CN116867260B - A closed type error-proofing device for SMT production line and its operation method - Google Patents

Abstract

The invention discloses a closed type error proofing device of an SMT production line and an operation method thereof, wherein the closed type error proofing device comprises an error proofing system APP, a background management system, a production line real-time monitoring system, an intelligent line side bin system, a chip mounter intelligent self-locking system, a material splitting module, a bulk material module, a material label management system and a central control system, wherein the error proofing system APP operates in a raspberry group, the central control system is arranged in the raspberry group, the raspberry group is respectively connected with an alarm and a power supply, and the background management system, the production line real-time monitoring system, the intelligent line side bin system, the chip mounter intelligent self-locking system, the material splitting module, the bulk material module and the material label management system are respectively connected with the central control system. According to the invention, the intelligent self-locking system of the chip mounter of the intelligent closed type error proofing system of the SMT production line is used for binding the material tray on the FEEDER and docking with the intelligent line side bin system, so that the hidden trouble that an operator does not understand the flow or operate the error sweeping station, take and connect errors and change the materials according to regulations is effectively avoided.

Description

A closed type error-proofing device for SMT production line and its operation method

Technical Field

The invention relates to the technical field of SMT patch, in particular to a closed type error-proofing device for an SMT production line and an operating method thereof.

Background Art

SMT is the abbreviation of Surface Mount Technology, which is the most commonly used mature assembly technology and process in the current electronic assembly industry. SMT uses a placement machine to mount various electronic components of different models and specifications onto a PCB (printed circuit board) according to a set program. Raw material storage, delivery, online production, material replenishment, material connection, material replacement, and material return are key links in the SMT production process. Because there are many production links and a wide variety of material specifications, although the SMT production line is equipped with IPQC (quality control) personnel to conduct regular sampling and full inspections of the entire production process, errors are still inevitable: abnormal material delivery, abnormal material loading, abnormal material replacement, abnormal material distribution, abnormal bulk (tail) material management, abnormal records, abnormal customer tracing, abnormal operation procedures, etc. These errors will affect the entire production. At the same time, this series of redundant verification, inspection, log recording and other work increases labor time and labor intensity.

In response to these situations, many companies at home and abroad have been committed to technological development and breakthroughs, and have achieved very good results. They have developed a series of practical anti-wrong material products, which effectively reduce the frequency of wrong material, reduce the operation process and labor intensity, and replace the work of operators with intelligent software and hardware. For example, the national patent publication numbers CN103049770A, CN104570891A, CN106061132A and CN109819645.A have realized the automatic inspection of the normal production process from warehouse discharge to finished product shipment, and use the barcode binding of materials, FEEDER (SMT feeder) and machine station, and use intelligent software to run through all production links, greatly improving the production efficiency and quality of the production line and reducing the error rate. However, these patented products cannot completely prevent the wrong materials. The main reason is that there are monitoring blind spots in the following links: first, the machine stations are closely arranged, and it is easy to scan the wrong station when scanning the barcode; second, even if the station is scanned correctly, it is easy to take the wrong material tray because the FEEDERs are closely arranged, one next to the other; third, the line storage positions are also closely arranged, which is prone to errors; fourth, a barcode scanner controls the entire process. If the operator does not understand the process or does not operate according to the regulations, the problem of wrong materials is still difficult to avoid; fifth, the management of material sorting and loose (tail) materials is missing and inadequate, which is prone to errors in material sorting and loose (tail) materials. The wrong material on the SMT production line is a very serious accident of responsibility, which will bring a series of adverse effects on normal production. When the wrong material occurs, the staff cannot discover and stop the loss in time, and the loss caused by wrong batch materials is even greater.

Based on the above reasons, the present invention provides a closed type error-proofing device for an SMT production line and an operating method thereof.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and provide a closed type error-proofing device for an SMT production line and an operating method thereof. The intelligent self-locking system of the placement machine of the intelligent closed type error-proofing device for the SMT production line is used to bind the material tray on the FEEDER and connect with the intelligent line side warehouse system, which effectively eliminates the hidden dangers of operators not understanding the process or not operating according to regulations and scanning the wrong position and taking the wrong material. At the same time, the material separation module and the bulk material module further standardize the process and can avoid the occurrence of errors.

To achieve the above-mentioned purpose, on the one hand, the present invention provides a closed type error-proofing device for an SMT production line, including software and hardware, wherein the software includes an error-proofing system APP, a background management system, a production line real-time monitoring system, an intelligent line-side warehouse system, a placement machine intelligent self-locking system, a material splitting module, a bulk material module, a material label management system and a central control system; the hardware includes a board passing sensor, an alarm light, a display, a scanner, a barcode printer, an intelligent shelf, an intelligent line-side warehouse, a placement machine, a placement machine intelligent self-locking mechanism and a feeder FEEDER;

The error-proofing system APP and central control system are both installed on the Raspberry Pi, which is connected to an alarm and a power supply respectively. The background management system, production line real-time monitoring system, intelligent line side warehouse system, placement machine intelligent self-locking system, material splitting module, bulk material module, and material label management system are connected to the central control system respectively; the central control system realizes error-proofing of the entire SMT production process by controlling the software systems connected to it, and then controlling the hardware connected to the software systems.

The error-proofing system APP is used to store material plans and check whether the material and station information match, and then ensure that the material is fed strictly according to the material plan by controlling the release and self-locking of the intelligent self-locking mechanism of the placement machine to achieve error-proofing of the material; the background management system is used to realize personnel management, work order management, material management, quality management and basic data management; the production line real-time monitoring system is used to collect production data, automatically report the station that needs to be replenished and issue signal instructions; the intelligent line-side warehouse system is used to receive outbound instructions and perform barcode verification, real-time monitoring of sensors, storage position light control, and lock position control operations, so as to realize the outbound or transfer of materials; the intelligent self-locking system of the placement machine is used to identify the required material connection and change when connecting and changing materials. The system can detect the position of materials, distinguish whether the materials are right or wrong, actively intervene in the operator's non-standard operation process, prompt the line-side warehouse to take materials and store them, and automatically lock the material tray when an error occurs; the material splitting module is used to split materials; the bulk material module is used to standardize the material use process when the production line generates materials and needs to clear them in time; the material label management system is used to convert the original material barcode into the internal barcode of the SMT production line according to the material standard example table uploaded by the warehouse operator, and print the converted internal barcode and stick it on the original barcode; the central control system is used to collect and store the discharge and remaining material data of the production line and the material location information, and control the intelligent self-locking system of the placement machine to self-lock when the data or material position is abnormal, and start the alarm light at the same time.

The intelligent line-side warehouse system is composed of one or more intelligent shelves placed next to the SMT production line. The intelligent shelves include QR code lighted shelves, induction smart shelves, intelligent self-locking shelves and intelligent tower warehouses. It has signal access and output functions, can prompt material storage locations, and can bind materials to storage locations. When an operation error occurs, it can issue an alarm in time. Shelves and warehouses with intelligent error prevention functions can be called intelligent shelves; the QR code lighted shelf is an SMT material storage rack guided by light and connected to a supporting software system. It can store more than one thousand trays of materials at a time. Each material storage location corresponds to a QR code for binding storage location information. At the same time, each storage location is also equipped with a set of signal indicator lights for waiting, error and normal, which are used to prompt the operator of the storage location status; the induction smart shelf is an upgraded version of the QR code lighted shelf. Each material storage location is equipped with an independent sensor that can automatically record storage location information. It has material positioning, first-in-first-out, LED Bin management, full-time material monitoring, authority management, wrong material alarm and power-off memory functions; the intelligent self-locking shelf includes a shelf, a first material box, a first material tray and a first electronic lock, the shelf is composed of a top plate, a bottom plate, a support plate and a partition, the support plate is supported between the top plate and the bottom plate, a number of partitions are arranged at equal intervals between the top plate and the bottom plate, a hinge seat is arranged in the middle of the partition, the first material box is a fan-shaped structure, the outer end face of the first material box is perpendicular to the inner end face, an indicator light is arranged on the top of the outer end of the first material box, the indicator light is electrically connected to the first electronic lock and the central control system respectively, the bottom of the outer end of the first material box is hinged to the hinge seat through a pin shaft, and the top of the first material box is provided with a tray slot for inserting the first material tray, An extension block is provided at the top of the inner end of the first material box, and a lock hole is provided on the outer wall of the extension block. The first electronic lock is fixed on the outer wall of the support plate, and a lock slot for inserting the extension block is provided on the first electronic lock. When the first electronic lock is locked with the lock hole, the distance between the outer end of the first material box and the upper partition is smaller than the outer diameter of the first material tray. When the outer end of the first material box is rotated to contact the lower partition, the distance between the outer end of the first material box and the upper partition is larger than the outer diameter of the first material tray. When the first material tray is inserted into the material box slot at the top of the first material box, the lock hole inside the first material box is used to lock with the first electronic lock, so that the distance between the outer end of the first material box and the upper partition is smaller than the outer diameter of the first material tray, thereby locking the first material tray and preventing it from entering or exiting.

There are two main forms of the intelligent self-locking mechanism of the placement machine: one is to install a baffle corresponding to the feeder table of the placement machine, which can lock the feeder and the materials on the feeder; the other is a storage type self-locking device similar to an intelligent self-locking shelf and fixed on the feeder table of the placement machine and corresponding to the position of the feeder;

The baffle-type intelligent self-locking mechanism of the placement machine, its material box plate includes a transverse plate and a longitudinal plate, the bottom of the transverse plate is fixed to the top of the loading platform base, and a cavity for the material box handle to be inserted is formed between two adjacent transverse plates, and a longitudinal plate integrally formed with the transverse plate is provided on the top of the transverse plate, and the two adjacent longitudinal plates are connected by the height limiting plate; a handle part is provided at the right end of the material box handle, an arc-shaped groove is provided at the bottom of the handle part, and the end of the handle part is a semicircular structure, and the limiting plates are connected to the middle sides of the material box handle by bolts, and a semicircular groove for the second material tray to be inserted is formed between the two adjacent limiting plates. The baffle-type intelligent self-locking mechanism of the placement machine can lock the material in case of material error by adding a limiting plate.

The intelligent self-locking mechanism of the warehouse-type placement machine includes a loading platform base, a second material box and a material box handle. The second material box is arranged on the top of the loading platform base. The second material box includes a plurality of material box plates and a height limiting plate. A cavity for inserting the material box handle is formed between two adjacent material box plates. The height limiting plate is connected between the tops of two adjacent material box plates. The material box handle is a semicircular structure. A semicircular groove for inserting the second material tray is provided in the middle of the material box handle. The lower ends of the outer walls on both sides of the material box handle are hinged to the adjacent material box plates. The left end of the material box handle is provided with a The lock hole is locked by the second electronic lock. When the lock hole and the second electronic lock are locked, the distance between the right end of the material box handle and the height limit plate is smaller than the outer diameter of the second material tray. When the right end of the material box handle is rotated clockwise until it contacts the top of the loading platform base, the distance between the right end of the material box handle and the height limit plate is larger than the outer diameter of the second material tray. After the second material tray is used up, the central control system controls the second electronic lock to open, and the user rotates the material box handle corresponding to the second material tray clockwise to take out the second material tray to avoid wrong materials.

On the other hand, the present invention also provides an operation method of the closed type error-proofing device of the SMT production line. The error-proofing device can be implemented in a fully automated AGV+manipulator state or in a manually operated state, and specifically includes the following steps:

Step S1, before production starts, the material label management system automatically converts the barcode of the original material into the internal barcode of the SMT production line after scanning the barcode of the original material with a scanner, and prints the converted internal barcode with a barcode printer and sticks it on the original barcode of the material;

Step S2: The material transfer vehicle stores the barcoded materials in the corresponding storage locations according to the instructions of the central control system, and enters the storage time and storage location information of the materials into the central control system. The administrator uploads the station table to the background management system according to the material list;

Step S3, the backend management system sends a delivery instruction to the intelligent line-side warehouse system, the intelligent line-side warehouse system receives the delivery instruction and verifies the barcode of the material, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line;

Step S4, production starts, the SMT production line operator checks the material list, confirms that all the required materials have been delivered to the designated location, performs the loading operation, and determines whether the loading operation is correct based on the current position of the material and the corresponding material number. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine and executes step S5; otherwise, the loading operation is performed again;

Step S5: After all machines have finished loading materials, the SMT production line starts production. During the production process, the operator scans the remaining materials of each machine one by one, and sends a storage instruction to the intelligent line warehouse system through the background management system. The intelligent line warehouse system receives the storage instruction and stores the materials in the designated position of the intelligent line warehouse after verifying the barcode of the materials.

Step S6, the real-time monitoring system of the production line connects to the board sensor according to the port of the placement machine to collect production data. When the real-time monitoring system of the production line detects that one or more machines need to be refilled, the system automatically reports the station where refilling is required and sends a signal instruction. The operator checks the interface information prompt of the Raspberry Pi and selects the refilling station. The intelligent line-side warehouse system sends a command to the line-side warehouse signal light to light up the prompt, or the intelligent self-locking line-side warehouse is automatically unlocked;

Step S7, the operator extracts materials from the intelligent line-side warehouse according to the intelligent line-side warehouse storage position signal, the intelligent line-side warehouse system transmits information to the intelligent self-locking system of the placement machine, the intelligent self-locking system of the placement machine unlocks the FEEDER material tray of the replenishing station and performs the replenishing operation. If the operator takes the wrong material, the intelligent self-locking system of the placement machine cannot unlock the FEEDER material tray of the replenishing station and the replenishing operation cannot be performed.

Furthermore, in step S3, the robot is controlled to grab materials from the shelf and put them on the transfer vehicle, and then the transfer vehicle transports the materials to the designated location of the SMT production line. When the same material is distributed to two or more machines, the number of trays is insufficient, and the material is split by the material splitting module. The specific steps are as follows:

Step S31, when the same material is distributed to two or more machines and the number of trays is insufficient, the operator inputs the operator ID, material storage location and number of trays to the material splitting module;

Step S32: the material splitting module retrieves a corresponding number of empty trays according to the material storage location and the number of trays, and the operator clears the original barcodes of the retrieved trays;

Step S33, the barcode printer prints the barcode of the corresponding number of material trays according to the material storage location information and the number of material trays, and sticks it on the prepared empty material tray;

Step S34, the intelligent line-side warehouse system takes out the materials, and the operator splits the materials. After verifying the barcode information of the materials and the trays, the split materials are rolled up in the trays with barcodes respectively, and put into the intelligent line-side warehouse after scanning the barcodes, waiting for the intelligent line-side warehouse system to transfer them.

Further, in step S4, when it is confirmed that all the required materials have been delivered to the designated location, the loading operation is performed, and the loading operation is judged to be correct according to the current station position of the placement machine and the material number corresponding to the material tray. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine. The specific process is as follows:

Step S41, first install the intelligent self-locking mechanism of the placement machine to the loading platform of the placement machine, and clear all debris in the intelligent self-locking mechanism of the placement machine, and insert the loading box in the intelligent self-locking mechanism of the placement machine into the corresponding position according to the station table;

Step S42, use a scanner to scan the barcode on the placement machine to get the station position, scan the barcode on the material tray to get the material number, judge whether the loading operation is correct according to the station position on the station table and the material number corresponding to the material tray, and the operator loads the material into the feeder FEEDER;

Step S43, scan the barcode of the material loaded into the feeder FEEDER, and when the loading box of the station is in the merged state, the loading box pops open, and the operator installs the feeder FEEDER to the specified position of the placement machine according to the signal light prompt of the intelligent self-locking mechanism of the placement machine;

Step S44, insert the material into the material box of the intelligent self-locking mechanism of the placement machine and close the material box. When it is placed in the wrong position, the material box cannot be closed, the signal light of the intelligent self-locking mechanism of the placement machine lights up, and a voice broadcast of material loading error is given. When the position is correct, a voice broadcast of material loading is correct and the loading operation is completed.

Furthermore, in step S6, when the real-time monitoring system of the production line detects that one or more machines need to be refilled, the operator sends a delivery instruction to the intelligent line warehouse through the background management system. The specific process is as follows:

Step S61, the real-time monitoring system of the production line collects production data according to the board sensor connected to the port of the placement machine, and sends a signal instruction when it detects that one or more machines need to be refilled. The operator checks the interface information prompt of the Raspberry Pi, selects the refilling station through the background management system, and sends a delivery instruction to the intelligent line side warehouse;

Step S62, the intelligent line-side warehouse system receives the outbound instruction and verifies the material barcode, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line;

Step S63: When the production line generates materials that need to be cleared and used in time, and when the smart line warehouse detects that the material inventory on the smart shelf is insufficient, the bulk material module is used to retrieve the materials for use.

Furthermore, in step S63, the bulk material is retrieved and used through the bulk material module, and the specific process is as follows:

Step S631: If there is a tray for the tail material, scan the tray barcode and store it in the intelligent line side warehouse;

Step S632: If there is no tray for the tailings, the operator needs to test the resistance and capacitance values. After verification by IPQC, a handwritten label is written. After confirmation by the supervisor, the supervisor enters the bulk material module in the Raspberry Pi operation interface and enters the storage location, quantity, operator ID, and IPQC ID information of the tailings in the smart line bin. The bulk material module sends a command to the label printer to print a new label. The operator sticks the label on the empty tray and rolls the tailings into the tray.

Step S633: re-scan the material tray with the tailings and store it in the smart line-side warehouse.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention realizes the fully enclosed error-proofing management of the SMT production process through the procedures of system control equipment → equipment anti-mistakes guide operators → equipment action completion information feedback to the system, etc. This human-machine interaction dominated by the system and equipment and software and hardware anti-mistakes at the same time can effectively realize the organic coordination between man and machine, ensuring that there will be no error in the SMT production process;

2. The present invention utilizes the intelligent self-locking system of the placement machine of the intelligent closed anti-error material device of the SMT production line to bind the material tray on the FEEDER and connect it with the intelligent line-side warehouse system, which effectively eliminates the hidden dangers of operators who do not understand the process or do not operate according to regulations and scan the wrong position and take the wrong material. At the same time, the material separation module and the bulk (tail) material module further standardize the process and can avoid the occurrence of errors.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a flowchart of a central control system of a closed type error-proofing device for an SMT production line according to the present invention;

FIG2 is a logical architecture diagram of the error-proofing function of a closed error-proofing device for an SMT production line according to the present invention;

FIG. 3 is a schematic diagram of the workshop layout of a closed type error-proofing device for an SMT production line according to the present invention.

FIG4 is a schematic diagram of the working process of a closed type error-proofing device for an SMT production line according to the present invention;

FIG5 is a schematic diagram of the structure of the intelligent self-locking shelf in the present invention;

FIG6 is a partial enlarged view of the intelligent self-locking shelf in FIG5;

7 is a schematic structural diagram of the intelligent self-locking mechanism of the warehouse-type placement machine of the present invention;

FIG8 is a cross-sectional view of the intelligent self-locking mechanism of the warehouse-type placement machine of the present invention;

FIG9 is a schematic structural diagram of the intelligent self-locking mechanism of the baffle type placement machine of the present invention;

10 is a schematic diagram of the internal structure of the intelligent self-locking mechanism of the baffle type placement machine of the present invention;

FIG11 is a schematic structural diagram of the intelligent self-locking mechanism of the hanging plate type placement machine of the present invention (front view);

FIG. 12 is a schematic diagram of the structure of the intelligent self-locking mechanism of the hanging plate type placement machine of the present invention (reverse side)

FIG13 is a flow chart of an operation method of a closed type error-proofing device for an SMT production line according to the present invention;

FIG14 is a material separation flow chart of the error-proofing device of the present invention;

15 is a flow chart of the feeding operation of the error-proofing device of the present invention;

16 is a flow chart of the feeding operation of the error-proofing device of the present invention;

17 is a flow chart of the feeding operation using materials of the error-proofing device of the present invention.

In the figure: 101, shelf; 102, first material box; 103, first material tray; 104, first electronic lock; 105, hinge seat; 106, pin; 108, caster; 111, top plate; 112, bottom plate; 113, support plate; 114, partition; 121, extension block; 122, indicator light; 201, loading platform base; 202, second material box; 203, material box handle; 205, second material tray; 206, second electronic lock; 211, horizontal plate; 212, longitudinal plate; 221, material box plate; 222, height limit plate; 231, semicircular groove; 232, lock hole; 233 handle; 234, arc groove; 235, limit plate.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Example

As shown in FIG1 , a closed type error-proofing device for an SMT production line is provided in this embodiment, including software and hardware. The software includes an error-proofing system APP, a background management system, a production line real-time monitoring system, an intelligent line-side warehouse system, a placement machine intelligent self-locking system, a material splitting module, a bulk material module, a material label management system, and a central control system; the hardware includes a board sensor, an alarm light, a display, a scanner, a barcode printer, an intelligent shelf, an intelligent line-side warehouse, a placement machine, a placement machine intelligent self-locking mechanism, and a feeder FEEDER;

As shown in Figure 2, the error-proofing system APP and central control system are both installed on the Raspberry Pi, which is connected to the alarm and power supply respectively. The background management system, production line real-time monitoring system, intelligent line side warehouse system, placement machine intelligent self-locking system, material splitting module, bulk material module, and material label management system are connected to the central control system respectively; the central control system realizes error-proofing of the entire SMT production process by controlling the software systems connected to it, and then controlling the hardware connected to each software system.

The board sensor is generally installed on the track of the previous process of the reflow furnace of the SMT production line, and is mainly used to collect production data and connect with the central control system; the alarm light is installed on the smart shelf, smart line-side warehouse and the smart self-locking mechanism of the SMT placement machine. When the operation is abnormal or illegal, the alarm light will sound an alarm to prompt the operator; the display is used to display digital information to realize human-computer interaction; the scanner is used to identify functions such as material barcodes, feeder FEEDER positions and smart line-side storage positions, and transmit the identified data information to the central control system; the barcode printer is used to print barcodes; the smart shelf is used to prompt the material storage location and can realize the binding of materials and storage locations. In this embodiment, the smart shelf refers to the QR code lighted shelf, induction smart shelf, smart self-locking shelf and smart tower warehouse in the prior art, which has signal access and output functions, can prompt the material storage location, can realize the binding of materials and storage locations, and can promptly sound an alarm when the operator makes an error. The shelves and warehouses with intelligent error prevention functions can be called smart shelves.

In order to make the structure and function of the above-mentioned smart shelves clearer, the structure and working process of the three smart shelves are further explained below:

①QR code lighted shelves

The QR code lighted shelf is an SMT material storage rack that is guided by light and connected to the supporting software system. It can store more than one thousand trays of materials at a time. Each material storage location corresponds to a QR code to bind the storage location information. At the same time, each storage location is also equipped with a set of signal indicators for waiting, error and normal to prompt the operator of the storage location status. The specific operation process is:

Material on the shelf: The operator first uses a scanner to scan the material label information, the shelf storage location light turns on, then puts the material tray into the lighted storage location, and scans the QR code of the lighted storage location with a scanner. At this point, the material is bound to the storage location, and the material is on the shelf;

Material unloading: The closed material error prevention device of the SMT production line prompts the station where the material is out of stock, and lights up, that is, the shelf storage signal light is on. The operator takes out the material according to the light guidance and scans the material label information with a scanner. After confirming that it is correct, the material is unloaded;

Connecting the lighted shelf system: Connecting with the manufacturing execution system MES

Disadvantages of QR code lighted shelves: manual scanning is required to store information. Because the storage locations are closely arranged, manual scanning of storage location information is prone to errors, the operation process is prone to omissions, and the storage of materials when loading and unloading the shelves is prone to errors.

In this embodiment, a systematic correction is made to the problem that the storage locations of the QR code lighted shelves are closely arranged and the materials are easily stored in the storage locations when being loaded and unloaded. Through the anti-error material system APP, the lighted shelf system and the intelligent self-locking system of the placement machine are connected to standardize the operating procedures. Before the operator connects or changes materials on the SMT production line, he must first scan the material label. If the material label information is inconsistent with the system information, the anti-error material system APP will prompt the intelligent self-locking mechanism of the placement machine to lock the feeder FEEDER and the material tray and issue an error material alarm. The operator can no longer perform the work of connecting or changing materials, thus preventing the occurrence of error materials.

②Inductive smart shelves

The induction smart shelf is an upgraded version of the QR code lighted shelf. Each material storage location is equipped with an independent sensor that can automatically record the storage location information. It has functions such as material positioning, first-in-first-out, LED Bin management, full-time material monitoring, authority management, wrong material alarm and power-off memory.

The specific operation process is:

Material shelving: The operator first uses a scanner to scan the material label information, and then puts the material tray into any vacant storage location. The material is automatically bound to the storage location and uploaded to the system to complete the material shelving (the storage location information is automatically bound to the material through the storage location sensor, and there is no error);

Material removal: The closed anti-error device of the SMT production line prompts the station where the material is out of stock, and the inductive intelligent shelf storage signal light is on. The operator takes out the material according to the light guidance. If the operator takes the wrong material, the system will automatically alarm.

2 Intelligent self-locking shelves are an improved version of induction-type intelligent shelves. On the basis of induction-type intelligent shelves, an independent intelligent self-locking device is installed for each storage location. The intelligent self-locking device is mainly composed of a tray support seat, a shaft bracket, a shaft, a buckle, an indicator light and an electronic induction lock.

When the operator scans the code to put the material into the storage location of the smart self-locking shelf and fastens the self-locking device, the system will automatically bind the material and storage location information according to the information of the self-locking mechanism and upload it to the system. If no system instructions are received, the self-locking mechanism cannot unlock the material tray, and the operator cannot take out any material. When the system prompts to connect and change materials, the system automatically unlocks the required material tray. The smart self-locking shelf plugs the loopholes in all links;

The working process of intelligent self-locking shelf:

Loading: Scan the QR code on the tray, put the material into the support frame of the self-locking device and push it forward. After it is pushed into place, the electronic lock will automatically lock. At the same time, the indicator light of the station will flash briefly to remind you that the material storage is OK. The self-locked material will be unable to enter or exit the tray because the distance between the material inlet and outlet is less than the diameter of the tray, thereby realizing the error prevention and foolproofing function.

Material discharging: The system issues a material call instruction. After receiving the material call instruction, the intelligent self-locking shelf automatically unlocks the target storage location. The material tray in the target storage location automatically pops out. After popping out, the distance between the material inlet and outlet will increase. At the same time, the indicator light of the station will light up, and the operator can freely take out or replace the material. When the material is taken out, the indicator light will go out.

Error-proofing system APP

The anti-wrong-material system APP is based on a B/S architecture system, and its core lies in the database server. The database server stores material planning lists, personnel management, material receiving and changing modules, material distribution modules and bulk material modules, etc. It can issue corresponding material call instructions through the WEB server and the database server according to the advance material call, remaining material time or remaining quantity set as needed, and command the relevant hardware to perform corresponding actions such as lighting up, unlocking, taking out of the cabinet, and taking out of the warehouse according to the issued material call instructions.

The data acquisition of the database server mainly comes from three methods: obtaining data by docking with the port of the placement machine; if the equipment does not provide port docking, a PCB counting device is installed on the placement machine to obtain data; if neither a port is provided nor a PCB counting device can be installed, data is collected by using a barcode scanner to scan the feeder FEEDER, the barcode of the material tray, and the operator pressing the self-locking position button.

The database server system is mainly composed of production planning and scheduling, material management (including label management), quality management, personnel management, error-proofing management, basic data management and other modules. All modules have four attributes: interface, function, logic and status. The error-proofing management module achieves the purpose of error-proofing by commanding the hardware to release the lock and checking whether the material and station information match;

2. Backend management system

The backend management system is used to implement personnel management, work order management, material management, quality management and basic data management;

Personnel management: This module is used to obtain operator information during material loading, receiving, changing, returning, dividing and bulking, and can be used for traceability;

Work order management: Users upload production plans in this module, including production quantity, start and end time, etc., for material batching;

Material management: records the in and out actions, and saves the material information and related location information. It is equivalent to an inventory management module, which can dispatch shelves to command their lights to light up, analyze the QR code information of materials, and generate related station labels;

Quality management: calculate the material loss of work orders and display the loss of each work order;

Basic data management: manage BOM material list and station location data of each machine model.

It should be noted that, as shown in FIG3 and FIG4, the existing generalized process is mainly as follows:

1) Create a BOM material list in the basic data management module to ensure that the specifications and quantities of various materials match the order data, and manually verify the correctness of the data;

2) After the materials arrive at the dock, check whether the material model specifications and quantity match according to the order/purchase information. After confirmation, enter the raw material warehouse, enter the incoming material information in the material management, and enter the storage location information in the WMS;

3) The production plan issues work order tasks to various departments. After receiving the task, the raw material warehouse needs to prepare the materials in advance according to the work order information. At this time, WMS is required to find materials and verify the integrity and correctness of the materials. The SMT production department needs to collect the corresponding materials from the raw material warehouse in advance according to the start time of the work order. The material management module generates a material delivery order in the raw material warehouse, and the SMT production department generates a material collection order;

4) After the SMT production department receives the materials, it uses material management to manually check the physical materials. After ensuring that the received materials are correct, the materials are put back on the shelves (traditional material storage shelves are generally used here, and there may be WMS to record the shelf information, or it may be directly managed using Excel);

5) When production is about to start, the SMT department needs to find the materials corresponding to the work order in advance, register the materials in the material management system, and find the first set of materials to facilitate the loading of the materials onto the feeder. When loading the materials onto the feeder, the material receiver uses the error-proofing material management PDA scanning inspection system to scan the code on the PDA to check whether the station information and material information of each tray of materials match. If they do not match, the system will alarm;

6) When production is about to start, the material receiver inserts the whole set of feeders into each module and uses the error-proofing material management PDA to scan and verify its correctness again;

7) After production starts, when the material tray is about to run out, the material receiver needs to find a new material tray to replace the empty tray and use the error-proofing material management PDA to scan to verify whether the loading position is correct;

8) During the production process, the inspection personnel use the error-proofing material management PDA to regularly check the correctness of materials at all stations;

9) After production is completed, unused materials are taken off the production line, entered into the material management system, and returned to the SMT department warehouse or raw material warehouse.

In this embodiment, the existing generalized process is improved, and the improved process is shown in Figures 3 and 4:

t1) Preparation and verification of bill of materials: Prepare the bill of materials in the basic data management module to ensure that the specifications and quantities of various materials match the order data. Use the association relationship with the help of algorithms to verify the bill of materials. The association relationship specifically means that there is a corresponding relationship between the location table and the logistics list table. Generally, the material total information of the location table is consistent with the bill of materials table, and is an integer multiple relationship; for example: the value of the material total information is N, if the final total number of materials in the bill of materials is N or an integer multiple of N, the verification passes.

In actual projects, customers often have material preparation errors due to errors in the bill of materials, which affects production progress and delivery time. This method can eliminate errors in station information from the source, reduce the chance of errors in basic data by business departments, and shorten material preparation time and material control process;

t2) After the materials arrive at the dock, check whether the material model specifications and quantity match according to the order/purchase information. After confirmation, enter the raw material warehouse and directly put the materials into the smart shelf. The smart shelf synchronizes the information to the smart line warehouse system and the material management module, combining the two steps of material entry and shelving into one, and synchronizes the hardware and system in real time. The material status is monitored in real time from the warehousing link, reducing the manual entry link, binding the material and location information in real time, eliminating the loss of materials due to warehousing errors, reducing the inventory process and time, and eliminating the possibility of scanning material A and placing material B;

t3) The production plan issues work order tasks to various departments. After receiving the tasks, the raw material warehouse needs to prepare the materials in advance according to the work order information. At this time, the material management module is used to link with the smart shelf to realize active lighting to guide the material retrieval. Because the smart shelf has a one-to-one correspondence with the material, each time a tray of material is taken out, the smart shelf synchronizes the information with the smart line-side warehouse system and the material management module. There is no need for the operator to manually enter the tray information, avoiding the possibility of wrong materials, and the efficiency of material retrieval is about 10 times that of traditional material search efficiency;

t4) After the SMT production department receives the materials, they are directly put on the smart shelves. The central control system will automatically check whether the materials received from the raw material warehouse are missing or in excess according to the material list. The system actively monitors the entire process, eliminating the leakage and wrong materials caused by the change of material position during transfer, and solves the problem of mixing and leaking materials when receiving multiple materials on the material list at one time;

t5) When production is about to start, the SMT department uses the material management module and smart shelves to find the corresponding materials by actively lighting up the lights. When each tray of materials is taken out, the system information will be updated in real time. Once the wrong material is taken out, the smart shelf will alarm. After the material is taken out, the material is put back on the smart line bin and pushed next to the feeder FEEDER. The smart line bin can only take out one tray of materials at a time according to the placement order of the feeder FEEDER, and light up the lights in turn to remind the operator to take out the corresponding first tray of materials, eliminating the possibility of the operator receiving material A and material B during the production process; when production is about to start, the material receiver inserts the whole set of feeders into each module and uses the error-proofing material management APP to scan and verify its correctness again;

t6) After production starts, when the material tray is about to run out, the feeder bayonet is released manually/automatically. The smart shelf will act according to the bayonet, and the storage position light of a tray of materials will be turned on each time. The material receiver can directly change the material after taking out the material. A preventive material receiving method is adopted here, and the material receiving right of only one station is released each time to avoid wrong material receiving. At the same time, for the situation where multiple people receive materials at the same time for a large material list, multiple smart line side warehouses can be arranged to send materials at the same time, and each person is responsible for receiving materials from different modules. Each person can only be bound to one smart line side warehouse on the same line, so as to ensure that the materials will not be received incorrectly. Improvement point: Jointly lock the feeder buckles of all stations on the same production line, and only allow the operation of materials at one station at a time. The material receiving process is clearer, the wrong materials will not be received, and the operation traceability is more convenient;

t7) During the production process, the inspection personnel use the scanner to scan and regularly or randomly check the correctness of materials at all stations;

t8) After production is completed, when unused materials come off the line, new material labels are directly generated by the material counting machine and put on the smart shelf. The shelf will synchronize the information to the material management module and the smart line warehouse system. There is no need to manually record the remaining material information, and the materials are put into storage as soon as they are put on the shelf, which reduces manual information entry and eliminates the wrong materials and missing materials caused by returned materials.

The present invention improves the existing generalized process, mainly integrating material planning, personnel management, error-proofing management and basic data management. Based on the idea of "minimizing human operation of the system and changing from post-correction to active prevention", the possibility of system errors is basically eliminated.

3. Real-time monitoring system for production lines

The real-time monitoring system of the production line (based on the port connection of the placement machine or the board sensor) collects production data. The system automatically reports the station that needs to be replenished and sends a signal instruction. The operator checks the interface information prompt of the Raspberry Pi and selects the replenishment station. The intelligent line-side warehouse system sends instructions to the line-side warehouse signal light, which lights up to prompt the material to be shipped out or transferred.

Material splitting module

This module runs on the anti-wrong-material system APP and can be logged in on the Raspberry Pi interface. The central control system manages the entire process of material outbound delivery, barcode scanning, material splitting, label printing, grading and verification, and labeling and warehousing to control operators in splitting materials. The system is deeply connected with the intelligent line-side warehouse system, the placement machine intelligent self-locking system, the background management system and the EMS system, effectively preventing the occurrence of wrong materials in splitting.

Bulk material module

The module runs on the error-proofing system APP, and the module can be logged into the Raspberry Pi interface. The system controls the entire process of bulk material grading, label printing, reel labeling, and code scanning for warehousing, allowing operators to prevent the error of bulk materials.

Central control system

It is used to start and stop the alarm light, count and display the number of PCB boards passing through the docking station, and control the smart shelves, smart line bins, and the smart self-locking mechanism of the placement machine. It includes the following:

① Actively collect real-time data of material passing through each production line;

② Actively calculate the real-time data of the remaining materials of each production line;

③Record the details of the self-locking buckle status changes of the placement machine;

④Record the location and movement information of materials in the smart shelf;

⑤ Provide external data query interface for the central control system to trace historical data.

7. Intelligent line side warehouse system

The intelligent line-side warehouse system is composed of one or more intelligent self-locking shelves with a self-locking mechanism placed next to the SMT production line. It is a material storage and transfer station for the SMT intelligent line-side warehouse and production line. The system is connected to the background management system, the intelligent self-locking mechanism of the placement machine, the material distribution and bulk material modules and the central control system. When the background management system does not have a warehouse outbound instruction, an alarm will be issued when the operator extracts the material (when the shelf is self-locking, the material cannot be taken out. After the system issues an instruction, the self-locking device pops up and lights up to guide the material retrieval). When taking out the material, the barcode printer will automatically print the material barcode. The operator will stick the barcode and close the warehouse door or the self-locking mechanism. The intelligent self-locking line-side warehouse will simultaneously send a signal to the intelligent self-locking system of the placement machine's material. Among them: the working logic of the intelligent self-locking shelf includes the following parts:

QR code verification: Verify whether the material QR code is valid and legal;

Sensor monitoring: monitor the status changes of sensors in smart shelves;

Storage position lamp control: batch scheduling control of storage position lamps can be realized;

Lock position control: batch scheduling control can be realized for lock positions;

Logical control: inbound action notification system/outbound instruction analysis/outbound traffic control/outbound action notification system/inbound and outbound abnormal judgment/pull-type material replenishment calculation/material buckle unlocking notification;

Shelf binding control: can be bound to a specific operator, only one person is allowed to be bound at a time;

Basic data management: Actively obtain the bill of materials and station table based on the work order being produced for replenishment logic calculation.

Intelligent self-locking shelves

As shown in Figures 5 and 6, the intelligent self-locking shelf includes a shelf 101, a first material box 102, a first material tray 103 and a first electronic lock 104. The shelf 101 is composed of a top plate 111, a bottom plate 112, a support plate 113 and a partition 114. The support plate 113 is supported between the top plate 111 and the bottom plate 112. A plurality of partitions 114 are evenly spaced between the top plate 111 and the bottom plate 112. A hinge seat 105 is provided in the middle of the partition 114. The first material box 102 is a fan-shaped structure. The outer end face of the first material box 102 is perpendicular to the inner end face. An indicator light 122 is provided on the top of the outer end of the first material box 102. The indicator light 122 is electrically connected to the first electronic lock 104 and the central control system respectively. The bottom of the outer end of the first material box 102 is hinged to the hinge seat 105 through a pin shaft 106. The top of the first material box 102 is provided with a material tray slot for inserting the first material tray 103. An extension block 121 is provided at the top of the inner end of the box 102, and a lock hole is provided on the outer wall of the extension block 121. The first electronic lock 104 is fixed on the outer wall of the support plate 113, and a lock groove for inserting the extension block 121 is provided on the first electronic lock 104. When the first electronic lock 104 is locked with the lock hole, the distance between the outer end of the first material box 102 and the upper partition 114 is smaller than the outer diameter of the first material tray 103. When the outer end of the first material box 102 is rotated to contact the lower partition 114, the distance between the outer end of the first material box 102 and the upper partition 114 is greater than the outer diameter of the first material tray 103. When the first material tray 103 is inserted into the material box slot at the top of the first material box 102, it is locked with the first electronic lock 104 through the lock hole inside the first material box 102, so that the distance between the outer end of the first material box 102 and the upper partition 114 is smaller than the outer diameter of the first material tray 103, thereby locking the first material tray 103 and preventing it from entering or exiting.

The working process of intelligent self-locking shelf:

Loading: Scan the QR code of the first material tray 103, put the material into the first material box 102 of the self-locking device and push it inward. After it is pushed into place, the first electronic lock 104 is automatically locked. At the same time, the indicator light 122 of the station will flash briefly to remind you that the material storage is OK. The self-locked material will be unable to enter or exit the first material tray 103 because the distance between the material inlet and outlet is less than the diameter of the first material tray 103, thereby realizing the error prevention and foolproofing function.

Discharging: The intelligent line-side warehouse system issues a discharging instruction. After receiving the discharging instruction, the intelligent shelf automatically unlocks the target storage location through the first electronic lock 104. The first material tray 103 in the target storage location automatically pops out. After popping out, the distance between the material inlet and outlet will increase. At the same time, the indicator light 122 of the station will light up, and the operator can freely take out or replace the first material tray 103. When the first material tray 103 is taken out, the indicator light 122 will go out.

Furthermore, the support plate 113 is supported at the middle position between the top plate 111 and the bottom plate 112, the top of the support plate 113 is connected to the middle of the bottom of the top plate 111, and the bottom of the support plate 113 is connected to the middle of the top of the bottom plate 112; a number of partitions 114 are evenly spaced on the outer walls on both sides of the support plate 113, so that the first material tray 103 can be placed on both sides of a shelf 1, which increases the storage space of the first material tray 103 without affecting the use of the first material tray 103.

Furthermore, casters 108 are provided at the four bottom corners of the bottom plate 112 to facilitate the movement of the shelf 101 .

Example

There are two main forms of intelligent self-locking mechanisms for placement machines: one is a baffle-type self-locking device that is installed on the feeder table of the placement machine and corresponds to the feeder one by one, and can lock the feeder and the materials on the feeder; the other is a warehouse-type self-locking device that is similar to an intelligent self-locking shelf and is fixed on the feeder table of the placement machine and corresponds to the feeder position one by one.

7 and 8 are schematic diagrams of the structure of the intelligent self-locking mechanism of the warehouse-type placement machine, which includes a loading platform base 201, a second material box 202 and a material box handle 203. The second material box 202 is arranged on the top of the loading platform base 201. The second material box 202 includes a plurality of material box plates 221 and a height limiting plate 222. A cavity for inserting the material box handle 203 is formed between two adjacent material box plates 221. The height limiting plate 222 is connected between the tops of two adjacent material box plates 221. The material box handle 203 is a semicircular structure. A semicircular groove 231 for inserting the feeding tray 205 is provided in the middle of the material box handle 203. The lower ends of the outer walls of both sides of the material box handle 203 are connected to the corresponding The adjacent material box plate 221 is hinged, and the left end of the handle of the second material box 202 is provided with a lock hole 232, and the lock hole 232 is locked by the second electronic lock 206. When the lock hole 232 and the second electronic lock 206 are locked, the distance between the right end of the material box handle 203 and the height limiting plate 222 is smaller than the outer diameter of the second material tray 205. When the right end of the material box handle 203 is rotated clockwise until it contacts the top of the loading platform base 201, the distance between the right end of the material box handle 203 and the height limiting plate 222 is greater than the outer diameter of the second material tray 205. After the second material tray 205 is used, the central control system controls the second electronic lock 206 to open, and the user rotates the material box handle 203 corresponding to the second material tray 205 clockwise to take out the second material tray 205 to avoid wrong materials.

Intelligent self-locking mechanism material changing process of warehouse-type placement machine

Manual material change process (i.e. active material change process): The operator changes materials according to the material shortage prompt of the placement machine or through the opening key. The process is: press the loading key - the material box automatically pops open and the prompt light 1 on the control panel lights up yellow - take out the material - the self-locking shelf unlocks the target material - the operator changes the material - push up the baffle and the material change prompt light turns green to end the loading.

The system guides the material change process (i.e., passive material change process): the system manually calculates the remaining material water level setting of the system based on the real-time usage quantity of the materials of the placement machine and the first material loading quantity. When the material reaches the warning water level, the system will directly notify the self-locking mechanism of the placement machine, and the material box of the self-locking mechanism will automatically pop open and the prompt light will light up yellow. The operator takes out the material, the self-locking shelf unlocks the target material, the operator changes the material, pushes up the material box, and the material change prompt light turns green to end the loading; or when the material reaches the warning water level, the system directly notifies the intelligent self-locking shelf, and the material bracket of the intelligent self-locking shelf automatically pops open. When the operator takes the material, the system will notify the self-locking mechanism of the placement machine to unlock it, and the material box of the self-locking mechanism will automatically pop open and the prompt light will light up yellow. The material is taken out, the operator changes the material, pushes up the material box, and the material change prompt light turns green to end the loading.

Example

There are two main forms of the intelligent self-locking mechanism of the placement machine: one is a baffle-type self-locking device that is installed on the placement machine FEEDER TABLE and corresponds to the FEEDER one by one, and can lock the FEEDER and the materials on the FEEDER; the other is a warehouse-type self-locking device that is similar to an intelligent self-locking shelf and is fixed on the FEEDER TABLE of the placement machine and corresponds to the FEEDER position one by one.

This embodiment is based on the embodiment 2 by placing the chip on the FEEDER A baffle corresponding to the FEEDER is installed on the TABLE, which can lock the material when the material is wrong. The baffle-type intelligent self-locking mechanism of the placement machine is shown in Figures 9 and 10. Its material box plate 221 includes a horizontal plate 211 and a longitudinal plate 212. The bottom of the horizontal plate 211 is fixed to the top of the loading table base 201. A cavity for inserting the material box handle 203 is formed between two adjacent horizontal plates 211. The top of the horizontal plate 211 is provided with a longitudinal plate 212 integrally formed with the horizontal plate 211, and the two adjacent longitudinal plates 212 are connected by the height limiting plate 222; a handle part 233 is provided at the right end of the material box handle 203, and an arc groove 234 is provided at the bottom of the handle part 233. The end of the handle part 233 is a semicircular structure. The two sides of the middle part of the material box handle 203 are connected with a limiting plate 235 by bolts, and a semicircular groove 231 for inserting the second material tray 205 is formed between two adjacent limiting plates 235.

The material changing process of the intelligent self-locking mechanism of the baffle type placement machine

Manual material change process (i.e. active material change process): The operator changes materials according to the material shortage prompt of the placement machine or through the warehouse opening key. The process is: press the loading key - the baffle automatically pops open and the prompt light 1 on the control panel lights up yellow - take out the material - the self-locking shelf unlocks the target material - the operator changes the material - push up the baffle and the material change prompt light turns on green to end the loading.

The system guides the material change process (i.e., passive material change process): The system manually calculates the remaining material water level setting of the system based on the real-time usage quantity of the materials of the placement machine and the first material loading quantity. When the material reaches the warning water level, the system will directly notify the self-locking mechanism of the placement machine, and the baffle of the self-locking mechanism will automatically pop open and the prompt light will light up yellow. The operator takes out the material, the self-locking shelf unlocks the target material, the operator changes the material, pushes up the baffle, and the material change prompt light turns green to end the loading; or when the material reaches the warning water level, the system directly notifies the smart shelf, and the material bracket of the smart shelf automatically pops open. When the operator takes the material, the system will notify the self-locking mechanism of the placement machine to unlock it, and the baffle of the self-locking mechanism will automatically pop open and the prompt light will light up yellow. The material is taken out, the operator changes the material, and pushes up the baffle, and the material change prompt light turns green to end the loading.

Example

In the present embodiment, a hanging tray type intelligent self-locking mechanism for a placement machine is provided. The hanging tray type intelligent self-locking mechanism for a placement machine does not need to rely on a complete set of intelligent self-locking mechanisms for a placement machine in the aforementioned embodiments, and can be applied to the self-locking of a single placement machine feeder. Under the premise that the production line does not have a complete set of control systems to control the intelligent self-locking mechanism of the placement machine, it can be directly hung on the tail of the feeder. Its structure is shown in Figures 11 and 12. The feeder hanging tray type intelligent self-locking mechanism for a placement machine includes a material box and a material box handle. The material box is arranged at the bottom of the material box handle. The material box has a semicircular structure. A semicircular groove for inserting a feed tray is provided in the material box. A locking hole is provided at the left end of the material box handle. The locking hole is locked by an electronic lock. The electronic lock controls its locking and release through an independent control system. After the locking hole is locked with the electronic lock, the material tray will be completely locked in the material box.

Example

The intelligent self-locking system of the chip mounter adopts the intelligent self-locking mechanism of the chip mounter in Example 2 and Example 3, which can lock the material tray on the feeder FEEDER of the chip mounter. When the signal instruction of the intelligent line-side warehouse system is not received, the feeder FEEDER and the material on the chip mounter are locked, and the material cannot be received or replaced. The system is connected with the intelligent line-side warehouse and the central control system, and has the functions of actively identifying the station where the material needs to be received or replaced, distinguishing the right or wrong materials, actively intervening in the operator's irregular operation process, and prompting the line-side warehouse to take the material storage position.

Specifically, the intelligent self-locking mechanism of the SMT machine is connected with the intelligent shelf and the intelligent line warehouse, and a fully enclosed error-proof material management system is formed through the manufacturing execution system MES. The system will automatically find the corresponding material in the intelligent line warehouse. After the operator extracts the material from the intelligent line warehouse, the intelligent line warehouse will send a signal to the intelligent self-locking mechanism of the SMT machine through the system. After receiving the signal, the intelligent self-locking mechanism of the SMT machine will automatically unlock the corresponding feeder FEEDER and material tray. After the operator completes the material exchange, he needs to close the door of the intelligent self-locking mechanism of the SMT machine material in time, otherwise the system will alarm and the next work instruction cannot be carried out; the system only receives one instruction at a time, and the intelligent self-locking mechanism of the SMT machine only unlocks the corresponding station material; the intelligent self-locking mechanism of the SMT machine corresponds to the feeder FEEDER one by one, and is separated by a baffle according to the feeder FEEDER station. The tray on the feeder FEEDER must be placed within the range of the intelligent self-locking mechanism of the SMT machine. The intelligent self-locking mechanism of the SMT machine, the intelligent line warehouse, and the manufacturing execution MES system are self-contained to ensure one-to-one fool-proof material exchange.

In this embodiment, according to the actual production line configuration of the user, the following docking methods are provided:

Docking with the placement machine port: Docking with the manufacturing execution system MES through the port, and at the same time docking with the third-party management software of the SMT production line. The SMT warehouse sends the first set of materials to the placement machine for production through the manufacturing execution system MES. During the production process, the manufacturing execution system MES system will obtain material usage data through the placement machine port in real time, and deduct the number according to the number of materials sent in the first set. The manufacturing execution system MES will then set a water level for the remaining number of materials. When the deduction reaches this water level, the manufacturing execution system MES will automatically inform the smart line side warehouse that the low-water-level material needs to be refilled, and the material in the corresponding storage position of the smart line side warehouse will be automatically unlocked and popped out. At the same time, the material indicator light of the storage position will flash, and the operator will be reminded by voice that refilling is needed. When the operator extracts materials, the label printer will automatically print the material label. After the operator sticks the label, the smart line side warehouse will send signals to the smart self-locking mechanism and SMT warehouse of the placement machine at the same time. The SMT warehouse will automatically replenish materials according to the actual production situation of the manufacturing execution system MES. After the self-locking mechanism of the placement machine receives the instruction to pick up the materials from the smart line side warehouse, the anti-wrong material system APP will immediately notify the smart self-locking mechanism of the placement machine to unlock. The operator can then carry out one-to-one material replenishment and control and lock the materials at this station again.

The SMT equipment does not support port docking: install a board passing sensor on the SMT machine, and use the board passing sensor to connect with the manufacturing execution system MES, and at the same time connect with the third-party management software of the SMT production line. The SMT warehouse sends the first set of materials to the SMT machine for production through the manufacturing execution system MES. During the production process, the board passing sensor installed on the production line will transmit the board passing data to the manufacturing execution system MES in real time. The manufacturing execution system MES will calculate the deduction based on the number of materials sent in the first set, BOM usage, and the number of boards passed. The manufacturing execution system MES can set a water level for the remaining quantity of materials. When the deduction reaches this water level, the manufacturing execution system MES will automatically inform the intelligent line side warehouse that the low-water-level material needs to be refilled. The material in the corresponding storage position of the intelligent line side warehouse will automatically unlock and pop up. At the same time, the material indicator light of the storage position will flash, and the operator will be reminded by voice that refilling is required. When the operator extracts materials, the label printer will automatically print material labels. After the operator affixes the labels, the smart line side warehouse will send signals to the smart self-locking mechanism and SMT warehouse of the placement machine at the same time. The SMT warehouse will automatically replenish materials according to the actual production situation of the manufacturing execution system MES. After the self-locking mechanism of the placement machine receives the instruction to pick up the materials from the smart line side warehouse, the anti-wrong material system APP will immediately notify the smart self-locking mechanism of the placement machine to unlock. The operator can then carry out one-to-one material replenishment and control and lock the materials at this station again.

The placement machine equipment does not support port docking and is not equipped with a board sensor: Use a barcode scanner to scan the feeder FEEDER and the material QR or barcode to connect with the manufacturing execution system MES, and at the same time connect with the SMT production line third-party management software. The operator can activate the error-proofing system APP through four manual operation methods (scan the station QR code, scan the feeder FEEDER QR code, scan the material tray QR code, and press the self-locking station button). The scanner or intelligent self-locking mechanism will inform the manufacturing execution system MES of the material replenishment information, and the manufacturing execution system MES will automatically inform the intelligent line-side warehouse, and the scanned material or the key-pressed material in the storage position will be automatically unlocked and popped out, and the material indicator light of the storage position will flash; when the operator extracts the material, the label printer will automatically print the material label. After the operator sticks the label, the intelligent line-side warehouse will simultaneously send a signal to the intelligent self-locking mechanism and SMT warehouse of the placement machine. The SMT warehouse will automatically replenish the material according to the actual production situation of the manufacturing execution system MES. After the intelligent self-locking mechanism of the placement machine receives the instruction to pick up the material from the intelligent line-side warehouse, the anti-wrong material system APP will immediately notify the placement machine self-locking mechanism to unlock, and the operator can carry out one-to-one material replenishment and control the material of the station again to lock it.

When the user does not have an intelligent line warehouse, the above operation process is changed as follows: the operator finds the corresponding material in the material storage area according to the material shortage information of the SMT production line, and scans the material barcode information. After receiving the information, the error-proofing system APP sends a signal command to the intelligent self-locking system of the placement machine. The intelligent self-locking mechanism then unlocks the feeder and material tray required for material connection and replacement according to the system command. The operator takes out the tray and performs the material connection and replacement operation.

It should be noted that in the above four scenarios, the fully enclosed material replacement process is that the system first activates the intelligent line side warehouse. When the operator extracts materials from the intelligent line side warehouse, the intelligent line side warehouse instantly issues a material outbound instruction to the system (when there is no intelligent line side warehouse, the material outbound instruction can be instantly issued to the system by scanning or activating the material barcode information). After receiving the instruction, the system will automatically activate the intelligent self-locking mechanism of the placement machine. The system also covers the following functions: When receiving a material refill instruction, the system will simultaneously notify the intelligent self-locking mechanism of the placement machine and the intelligent line side warehouse. The intelligent self-locking mechanism of the placement machine will unlock according to the material to be controlled, and cooperate with the intelligent line side warehouse to discharge the material.

Example

As shown in FIG. 13 , this example further provides an operation method of the closed type error-proofing device for the SMT production line described in Example 1, including the following steps:

Step S1, before production starts, the material label management system automatically converts the barcode of the original material into the internal barcode of the SMT production line after scanning the barcode of the original material with a scanner, and prints the converted internal barcode with a barcode printer and sticks it on the original barcode of the material;

Step S2: The material transfer vehicle stores the barcoded materials in the corresponding storage locations according to the instructions of the central control system, and enters the storage time and storage location information of the materials into the central control system. The administrator uploads the station table to the background management system according to the material list;

Step S3, the backend management system sends a delivery instruction to the intelligent line-side warehouse system, the intelligent line-side warehouse system receives the delivery instruction and verifies the barcode of the material, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line;

Step S4, production starts, the SMT production line operator checks the material list, confirms that all the required materials have been delivered to the designated location, performs the loading operation, and determines whether the loading operation is correct based on the current position of the material and the corresponding material number. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine and executes step S5; otherwise, the loading operation is performed again;

Step S5: After all machines have finished loading materials, the SMT production line starts production. During the production process, the operator scans the remaining materials of each machine one by one, and sends a storage instruction to the intelligent line warehouse system through the background management system. The intelligent line warehouse system receives the storage instruction and stores the materials one by one in the designated position of the intelligent line warehouse after verifying the barcode of the materials.

Step S6, the real-time monitoring system of the production line connects to the board sensor according to the port of the placement machine to collect production data. When the real-time monitoring system of the production line detects that one or more machines need to be refilled, the system automatically reports the station where refilling is required and sends a signal instruction. The operator checks the interface information prompt of the Raspberry Pi and selects the refilling station. The intelligent line-side warehouse system sends a command to the line-side warehouse signal light to light up the prompt, or the intelligent self-locking line-side warehouse is automatically unlocked;

Step S7, the operator extracts materials from the intelligent line-side warehouse according to the intelligent line-side warehouse storage position signal, the intelligent line-side warehouse system transmits information to the intelligent self-locking system of the placement machine, the intelligent self-locking system of the placement machine unlocks the FEEDER material tray of the replenishing station and performs the replenishing operation. If the operator takes the wrong material, the intelligent self-locking system of the placement machine cannot unlock the FEEDER material tray of the replenishing station and the replenishing operation cannot be performed.

Further, as shown in FIG14 , in step S3, the robot is controlled to grab materials from the shelf and put them on the transfer vehicle, and then the transfer vehicle transports the materials to the designated location of the SMT production line. When the same material is distributed to two or more machines, the number of trays is insufficient, and the material is split by the material splitting module. The specific steps are as follows:

Step S31, when the same material is distributed to two or more machines, resulting in insufficient number of trays, the operator inputs the operator ID, material storage location and number of trays to the material splitting module;

Step S32: the material splitting module retrieves a corresponding number of empty trays according to the material storage location and the number of trays, and the operator clears the original barcodes of the retrieved trays;

Step S33, the barcode printer prints the barcode of the corresponding number of material trays according to the material storage location information and the number of material trays, and sticks it on the prepared empty material tray;

Step S34, the intelligent line-side warehouse system takes out the materials, and the operator splits the materials. After verifying the barcode information of the materials and the trays, the split materials are rolled up in the trays with barcodes respectively, and put into the intelligent line-side warehouse after scanning the barcodes, waiting for the intelligent line-side warehouse system to transfer them.

Further, as shown in FIG. 15 , when it is confirmed in step S4 that all the required materials have been delivered to the designated position, the loading operation is performed, and the loading operation is judged to be correct according to the current station position of the placement machine and the material number corresponding to the material tray. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine. The specific process is as follows:

Step S41, first install the intelligent self-locking mechanism of the placement machine to the loading platform of the placement machine, and clear all debris in the intelligent self-locking mechanism of the placement machine, and insert the loading box in the intelligent self-locking mechanism of the placement machine into the corresponding position according to the station table;

Step S42, use a scanner to scan the barcode on the placement machine to get the station position, scan the barcode on the material tray to get the material number, judge whether the loading operation is correct according to the station position on the station table and the material number corresponding to the material tray, and the operator loads the material into the feeder FEEDER;

Step S43, scan the barcode of the material loaded into the feeder FEEDER, and when the loading box of the station is in the merged state, the loading box pops open, and the operator installs the feeder FEEDER to the specified position of the placement machine according to the signal light prompt of the intelligent self-locking mechanism of the placement machine;

Step S44, insert the material into the material box of the intelligent self-locking mechanism of the placement machine and close the material box. When it is placed in the wrong position, the material box cannot be closed, the signal light of the intelligent self-locking mechanism of the placement machine lights up, and a voice broadcast of material loading error is given. When the position is correct, a voice broadcast of material loading is correct and the loading operation is completed.

Further, as shown in FIG16 , in step S6, when the real-time monitoring system of the production line detects that one or more machines need to be refilled, the operator sends a delivery instruction to the intelligent line warehouse through the background management system. The specific process is as follows:

Step S61, the real-time monitoring system of the production line collects production data according to the board sensor connected to the port of the placement machine, and sends a signal instruction when it detects that one or more machines need to be refilled. The operator checks the interface information prompt of the Raspberry Pi, selects the refilling station through the background management system, and sends a delivery instruction to the intelligent line side warehouse;

Step S62, the intelligent line-side warehouse system receives the outbound instruction and verifies the material barcode, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line;

Step S63: When the production line generates bulk materials that need to be cleared and used in time, the bulk material module is used to retrieve the bulk materials for use. (For specific steps, please refer to 9.13 bulk material operation method in the original data, and the bulk material flow chart in Figure 15 needs to be adjusted according to the operation method).

Further, as shown in FIG17 , the bulk material is retrieved and used through the bulk material module in step S63, and the specific process is as follows:

Step S631: If there is a tray for the tail material, scan the tray barcode and store it in the intelligent line side warehouse;

Step S632: If there is no tray for the tailings, the operator needs to test the resistance and capacitance values. After verification by IPQC, a handwritten label is written. After confirmation by the supervisor, the supervisor enters the bulk material module in the Raspberry Pi operation interface and enters the storage location, quantity, operator ID, and IPQC ID information of the tailings in the smart line bin. The bulk material module sends a command to the label printer to print a new label. The operator sticks the label on the empty tray and rolls the tailings into the tray.

Step S633: re-scan the material tray with the tailings and store it in the smart line-side warehouse.

The above specifically describes the preferred implementation method of the present invention, but the invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims (8)

1. A closed type error-proofing device for an SMT production line, comprising software and hardware, characterized in that the software comprises an error-proofing system APP, a background management system, a production line real-time monitoring system, an intelligent line-side warehouse system, a mounter intelligent self-locking system, a material splitting module, a bulk material module, a material label management system and a central control system; the hardware comprises a board-passing sensor, an alarm light, a display, a scanner, a barcode printer, an intelligent shelf, an intelligent line-side warehouse, a mounter, a mounter intelligent self-locking mechanism and a feeder FEEDER; The anti-wrong material system APP and central control system are installed on the Raspberry Pi, and the Raspberry Pi is connected to the alarm and power supply respectively. The background management system, production line real-time monitoring system, intelligent line side warehouse system, placement machine intelligent self-locking system, material splitting module, bulk material module, and material label management system are connected to the central control system respectively; The board sensor is installed on the track of the previous process of the reflow furnace of the SMT production line to collect production data and connect with the central control system; the alarm light is installed on the smart shelf, smart line-side warehouse and the smart self-locking mechanism of the SMT placement machine. When the operation is abnormal or illegal, the alarm light will sound an alarm to prompt the operator; the display is used to display digital information to realize human-computer interaction; the scanner is used to identify the material barcode, the feeder FEEDER position and the smart line-side warehouse storage position function, and transmit the identified data information to the central control system; the barcode printer is used to print barcodes; the smart shelf is used to prompt the material storage location, and can realize the binding of materials and storage locations; The intelligent self-locking mechanism of the placement machine includes a warehouse-type self-locking device and a baffle-type self-locking device; The storage-type self-locking device comprises a loading platform base, a second material box and a material box handle, the second material box is arranged on the top of the loading platform base, the second material box comprises a plurality of material box plates and a height limiting plate, a cavity for inserting the material box handle is formed between two adjacent material box plates, the height limiting plate is connected between the tops of two adjacent material box plates, the material box handle is a semicircular structure, a semicircular groove for inserting the second material tray is provided in the middle of the material box handle, the lower ends of the outer walls on both sides of the material box handle are hinged to the adjacent material box plates, and a lock hole is provided at the left end of the material box handle. The lock hole is locked by the second electronic lock. When the lock hole and the second electronic lock are locked, the distance between the right end of the material box handle and the height limit plate is smaller than the outer diameter of the second material tray. When the right end of the material box handle is rotated clockwise to contact the top of the loading platform base, the distance between the right end of the material box handle and the height limit plate is larger than the outer diameter of the second material tray. After the second material tray is used, the central control system controls the second electronic lock to open, and the user rotates the material box handle corresponding to the second material tray clockwise to take out the second material tray to avoid wrong materials. The baffle-type self-locking device, the material box plate includes a transverse plate and a longitudinal plate, the bottom of the transverse plate is fixed to the top of the loading platform base, a cavity for the material box handle to be inserted is formed between two adjacent transverse plates, the top of the transverse plate is provided with a longitudinal plate integrally formed with the transverse plate, and the two adjacent longitudinal plates are connected by the height limiting plate; a handle part is provided at the right end of the material box handle, an arc-shaped groove is provided at the bottom of the handle part, the end of the handle part is a semicircular structure, and the limiting plates are connected on both sides of the middle part of the material box handle by bolts, and a semicircular groove for the second material tray to be inserted is formed between the two adjacent limiting plates. 2. A closed type error-proofing device for an SMT production line according to claim 1, characterized in that the error-proofing system APP is used to store material plans and check whether the material and station information match, and then control the release and self-locking of the intelligent self-locking mechanism of the placement machine to ensure that the material is fed strictly in accordance with the material plan to achieve error-proofing of the material; the background management system is used to realize personnel management, work order management, material management, quality management and basic data management; the production line real-time monitoring system is used to collect production data, automatically report the station that needs to be replenished and issue signal instructions; the intelligent line side warehouse system is used to receive outbound instructions and execute barcode verification, real-time monitoring of sensors, storage position light control, and lock position control operations, so as to realize the outbound or transfer of materials; the patch The machine's intelligent self-locking system is used to identify the station required to receive and change materials, distinguish whether the material is right or wrong, actively intervene in the operator's irregular operating procedures, prompt the line-side warehouse to take the material storage location, and automatically lock the material tray when an error occurs; the material splitting module is used to split the material; the bulk material module is used to put the remaining materials into use when the material inventory is insufficient; the material label management system is used to convert the original material barcode into the internal barcode of the SMT production line according to the material standard example table uploaded by the warehouse operator, and print the converted internal barcode and stick it on the original barcode; the central control system is used to collect and store the production line's discharge, remaining material data and material location information, and control the placement machine's intelligent self-locking system to self-lock when the data or material position is abnormal, and start the alarm light at the same time. 3. A closed type anti-error material device for an SMT production line according to claim 1, characterized in that the intelligent self-locking shelf comprises a shelf, a first material box, a first material tray and a first electronic lock, the shelf is composed of a top plate, a bottom plate, a support plate and a partition, the support plate is supported between the top plate and the bottom plate, a plurality of partitions are evenly spaced between the top plate and the bottom plate, a hinge seat is provided in the middle of the partition, the first material box is a fan-shaped structure, the outer end face of the first material box is perpendicular to the inner end face, an indicator light is provided on the top of the outer end of the first material box, the indicator light is electrically connected to the first electronic lock and the central control system respectively, the bottom of the outer end of the first material box is hinged to the hinge seat by a pin shaft, and a material tray for inserting the first material tray is provided on the top of the first material box. The lock hole is formed on the inner wall of the support plate, and the first electronic lock is fixed on the outer wall of the support plate. The lock hole is formed on the first electronic lock to lock the extension block. When the first electronic lock is locked with the lock hole, the distance between the outer end of the first material box and the upper partition is smaller than the outer diameter of the first material tray. When the outer end of the first material box is rotated to contact the lower partition, the distance between the outer end of the first material box and the upper partition is larger than the outer diameter of the first material tray. When the first material tray is inserted into the material box slot at the top of the first material box, the lock hole inside the first material box is used to lock with the first electronic lock, so that the distance between the outer end of the first material box and the upper partition is smaller than the outer diameter of the first material tray, thereby locking the first material tray and preventing it from entering or exiting. 4. An operating method of a closed type error-proofing device for an SMT production line as claimed in claims 1 to 3, characterized in that the error-proofing system can be implemented in a fully automated AGV+manipulator state or in a manually operated state, specifically comprising the following steps: Step S1, before production starts, the material label management system automatically converts the barcode of the original material into the internal barcode of the SMT production line after scanning the barcode of the original material with a scanner, and prints the converted internal barcode with a barcode printer and sticks it on the original barcode of the material; Step S2: The material transfer vehicle stores the barcoded materials in the corresponding storage locations according to the instructions of the central control system, and enters the storage time and storage location information of the materials into the central control system. The administrator uploads the station table to the background management system according to the material list; Step S3, the backend management system sends a delivery instruction to the intelligent line-side warehouse system, the intelligent line-side warehouse system receives the delivery instruction and verifies the barcode of the material, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line; Step S4, production starts, the SMT production line operator checks the material list, confirms that all the required materials have been delivered to the designated location, performs the loading operation, and determines whether the loading operation is correct based on the current position of the material and the corresponding material number. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine and executes step S5; otherwise, the loading operation is performed again; Step S5: After all machines have finished loading materials, the SMT production line starts production. During the production process, the operator scans the remaining materials of each machine one by one, and sends a storage instruction to the intelligent line warehouse system through the background management system. The intelligent line warehouse system receives the storage instruction and stores the materials in the designated position of the intelligent line warehouse after verifying the barcode of the materials. Step S6, the production line real-time monitoring system connects the board sensor according to the port of the placement machine to collect production data. When the production line real-time monitoring system detects that one or more machines need to be refilled, the system automatically reports the station where refilling is required and sends a signal instruction. The operator checks the interface information prompt of the Raspberry Pi and selects the refilling station. The intelligent line-side warehouse system sends a command to the line-side warehouse signal light to light up the prompt, or the intelligent self-locking line-side warehouse is automatically unlocked; Step S7, the operator extracts materials from the intelligent line-side warehouse according to the intelligent line-side warehouse storage position signal, the intelligent line-side warehouse system transmits information to the intelligent self-locking system of the placement machine, the intelligent self-locking system of the placement machine unlocks the FEEDER material tray of the replenishing station and performs the replenishing operation. If the operator takes the wrong material, the intelligent self-locking system of the placement machine cannot unlock the FEEDER material tray of the replenishing station and the replenishing operation cannot be performed. 5. The method for operating the closed type error-proofing device of the SMT production line according to claim 4 is characterized in that, in step S3, the manipulator is controlled to grab materials from the shelf and put them on the transfer vehicle, and then the transfer vehicle transports the materials to the designated position of the SMT production line. When the same material is distributed to two or more machines, the number of trays is insufficient, and the material is split by the material splitting module. The specific steps are as follows: Step S31, when the same material is distributed to two or more machines and the number of trays is insufficient, the operator inputs the operator ID, material storage location and number of trays to the material splitting module; Step S32: the material splitting module retrieves a corresponding number of empty trays according to the material storage location and the number of trays, and the operator clears the original barcodes of the retrieved trays; Step S33, the barcode printer prints the barcode of the corresponding number of material trays according to the material storage location information and the number of material trays, and sticks it on the prepared empty material tray; Step S34, the intelligent line-side warehouse system takes out the materials, and the operator splits the materials. After verifying the barcode information of the materials and the trays, the split materials are rolled up in the trays with barcodes respectively, and put into the intelligent line-side warehouse after scanning the barcodes, waiting for the intelligent line-side warehouse system to transfer them. 6. The method for operating the closed type error-proofing device for an SMT production line according to claim 4 is characterized in that, in the case of confirming that all required materials have been delivered to the designated position in step S4, a loading operation is performed, and whether the loading operation is correct is determined according to the current position of the placement machine and the material number corresponding to the material tray. If correct, the operator installs the feeder FEEDER to the designated position of the placement machine. The specific process is as follows: Step S41, first install the intelligent self-locking mechanism of the placement machine to the loading platform of the placement machine, and clear all debris in the intelligent self-locking mechanism of the placement machine, and insert the loading box in the intelligent self-locking mechanism of the placement machine into the corresponding position according to the station table; Step S42, use a scanner to scan the barcode on the placement machine to get the station position, scan the barcode on the material tray to get the material number, judge whether the loading operation is correct according to the station position on the station table and the material number corresponding to the material tray, and the operator loads the material into the feeder FEEDER; Step S43, scan the barcode of the material loaded into the feeder FEEDER, and when the loading box of the station is in the merged state, the loading box pops open, and the operator installs the feeder FEEDER to the specified position of the placement machine according to the signal light prompt of the intelligent self-locking mechanism of the placement machine; Step S44, insert the material into the material box of the intelligent self-locking mechanism of the placement machine and close the material box. When it is placed in the wrong position, the material box cannot be closed, the signal light of the intelligent self-locking mechanism of the placement machine lights up, and a voice broadcast of material loading error is given. When the position is correct, a voice broadcast of material loading is correct and the loading operation is completed. 7. The method for operating the closed type error-proofing device for an SMT production line according to claim 4 is characterized in that, in step S6, when the real-time monitoring system of the production line detects that one or more machines need to be refilled, the system automatically reports the station where refilling is required and issues a signal instruction, and the specific process is as follows: Step S61, the real-time monitoring system of the production line collects production data according to the board sensor connected to the port of the placement machine, and sends a signal instruction when it detects that one or more machines need to be refilled. The operator checks the interface information prompt of the Raspberry Pi, selects the refilling station through the background management system, and sends a delivery instruction to the intelligent line side warehouse; Step S62, the intelligent line-side warehouse system receives the outbound instruction and verifies the material barcode, and after the verification is correct, controls the manipulator to grab the material from the shelf and put it on the transfer vehicle, and then the transfer vehicle transports the material to the designated location of the SMT production line; Step S63: When the smart line warehouse detects that the material inventory on the smart shelf is insufficient, the bulk material module is used to retrieve the material for use. 8. The method for operating the closed type error-proofing device for an SMT production line according to claim 7, characterized in that the material is retrieved and used through the bulk material module in step S63, and the specific process is as follows: Step S631: If there is a tray for the tail material, scan the tray barcode and store it in the intelligent line side warehouse; Step S632: If there is no tray for the tailings, the operator needs to test the resistance and capacitance values. After IPQC checks that they are correct, the operator writes a label and confirms it. The supervisor then enters the bulk material module in the Raspberry Pi operation interface and enters the storage location, quantity, operator ID, and IPQC ID information of the tailings in the smart line bin. The bulk material module sends a command to the label printer to print a new label. The operator sticks the label on the empty tray and rolls the tailings into the tray. Step S633: re-scan the material tray with the tailings and store it in the smart line-side warehouse.