CN115055832A - A kind of wheel hub marking device and marking method - Google Patents

Abstract

The invention relates to a wheel hub marking device and a marking method. The device comprises an angle detection mechanism, an angle adjustment mechanism and a laser marking machine; the angle adjustment mechanism is arranged on a production line and comprises a jacking module, a centering module and a rotating Module, the jacking module is provided with a station, the centering module alignment station is arranged on the side of the jacking module, and the rotation module is connected with the jacking module in a transmission; the angle detection mechanism includes a trigger module arranged in the alignment station and a first The image detection module, the trigger module is used to detect the position information of the wheel hub, the first image detection module is used to obtain the image information of the wheel hub according to the position information, and the angle information of the wheel hub is detected according to the image information; the rotation module is used to adjust the working position according to the angle information The angle of the laser marking machine is set above the station for laser marking after the angle is adjusted. The invention solves the problem of inaccurate angular position of laser marking, and makes the angular position of wheel hub marking consistent and efficient.

Description

A kind of wheel hub marking device and marking method

technical field

The invention relates to the technical field of intelligent manufacturing, in particular to a wheel hub marking device and a marking method.

Background technique

In the automobile manufacturing industry, the traditional wheel hub marking position is close to the edge of the wheel hub, close to the outer circle of the wheel hub, and the marking here does not require much of the angle of the wheel hub. With the development of the automobile industry, higher requirements for product quality are put forward. It is required to change the marking position of the wheel hub to a position close to the inner circle of the wheel hub, and there are strict requirements for the angle of the marking position in the circumferential direction of the wheel hub. In order to meet the higher quality requirements in the wheel production process and make the production line more standardized and efficient, it is necessary to design an efficient and accurate wheel marking equipment that can be applied to the assembly line.

SUMMARY OF THE INVENTION

Aiming at the technical problems existing in the prior art, the present invention provides a wheel hub marking device and a marking method, which are used to solve the problem of inaccurate angular position of laser marking and make the angular position of wheel hub marking consistent and efficient. sex.

The technical scheme that the present invention solves the above-mentioned technical problems is as follows:

As a first aspect of the present invention, the present invention provides a wheel hub marking device, including an angle detection mechanism, an angle adjustment mechanism and a laser marking machine; the angle adjustment mechanism is arranged on the production line, and includes a jacking module, a pair of A middle module and a rotating module, the jacking module is provided with a station, the centering module is aligned with the station and is arranged on the side of the jacking module, and the rotating module is drive-connected with the jacking module; the angle detection mechanism It includes a trigger module and a first image detection module set at the alignment station, the trigger module is used to detect the position information of the wheel hub, and the first image detection module is used to obtain the image information of the wheel hub according to the position information, and according to the image information The angle information of the wheel hub is detected; the rotation module is used to adjust the angle of the station according to the angle information; the laser marking machine is arranged above the station for laser marking after the angle adjustment.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Preferably, the jacking module includes a jacking table, a telescopic cylinder and a guide column, the station is arranged on the top surface of the jacking table, the telescopic cylinder is vertically arranged below the jacking table, and the The movable part is fixedly connected with the jacking table, and the fixed part of the telescopic cylinder is fixedly arranged by the mounting piece; the guide column is arranged in parallel with the moving direction of the telescopic cylinder, one end of the guide column is fixedly connected with the jacking table, and the other end of the guide column slides with the mounting piece connect.

Preferably, the centering module includes a centering drive motor, a double-ended screw, two centering brackets and a plurality of rollers, the centering drive motor is fixedly arranged, and its output end is connected to the double-ended screw in a driving manner. The head screw is arranged in parallel with the lifting platform, the two centering brackets are symmetrically arranged at both ends of the double-ended screw, and are engaged with the thread of the double-ended screw for transmission. The axles of the plurality of rollers are installed on the centering bracket, and the The wheel surface is used for matching with the wheel hub; the thread directions at both ends of the double-start thread are opposite, and when the centering drive motor operates, the wheel surface of the roller moves toward or away from the wheel hub.

Preferably, the output shaft of the centering drive motor is drivingly connected with the double-ended screw through a transmission belt mechanism.

Preferably, the rotation module includes a rotary drive motor, a driving gear and a driven gear, the output end of the rotary driving motor is drivingly connected to the gear shaft of the driving gear, the driving gear is meshed with the driven gear, and the driven gear is The gear is parallel to the jacking table and is arranged under the jacking table, and the gear shaft of the driven gear is fixedly connected with the center of the jacking table.

Preferably, the output end of the rotary drive motor is connected to the gear shaft of the driving gear through a worm gear box.

Preferably, the trigger module is a position sensor.

Preferably, the device further includes a controller, the first image detection module is connected with the controller for bidirectional communication, the output end of the trigger module is connected to the input end of the controller, and the multiple output ends of the controller correspond to Connect the feeding module, jacking module, centering module, rotating module and laser marking machine;

The controller outputs a feeding control signal to the feeding module, a hub alignment signal to the alignment module, a jacking control signal to the jacking module, and an image capturing signal to the first image detection module according to the position information; the The controller also calculates the circumferential angle of the hub according to the image information, compares the circumferential angle with the angle threshold to obtain the angle difference, and outputs a rotation control signal to the rotation module according to the unqualified angle difference, and according to the qualified angle difference Output the marking control signal to the laser marking machine.

Preferably, the laser marking machine includes a laser source, a transflective lens, a galvanometer and a second image detection module, and the laser source, the galvanometer and the workstation are all arranged on the reflective surface of the transflective lens, And the laser source, the galvanometer and the work station are connected through the optical path in sequence; the second image detection module is arranged on the transmission surface of the transflective lens, and the second image detection module, the transflective lens and the galvanometer are coaxially arranged ; The second image detection module is used to detect whether the quality of the laser marking is qualified through the image.

As the second aspect of the present invention, the present invention also provides a wheel hub marking method, comprising:

S1, obtain the position information of the hub to be marked, and sequentially stop the hub displacement according to the position information, adjust the height of the hub, and align the center of the hub to a preset position;

S2, obtain the image information of the hub to be marked, extract the position information of the reference object according to the image information, calculate the angle information in the circumferential direction of the hub according to the position information of the reference object, make a difference between the angle information and the angle threshold, and obtain the belt The angle difference of the direction, if the angle difference exceeds the angle difference threshold range, then rotate the hub to adjust its circumferential angle;

S3, carry out laser marking on the wheel hub, and check the marking quality through the image.

The beneficial effects of the present invention are: when the device of the present invention is used to carry out laser marking on the marking surface of the wheel hub, the top surface of the wheel hub to be marked faces upwards and flows to the device of this embodiment along with the production line, and the trigger module detects that The wheel hub has reached the preset position, the jacking module lifts the wheel hub away from the drum of the production line, and the centering module pushes the wheel hub from the outside to the inside along the radial direction of the wheel hub to align its center point with the preset position, so that the wheel hub The marking surface and the reference object of the marking surface face the first image detection module. The first image detection module captures the image of the wheel hub and calculates the circumferential angle of the wheel hub according to the position of the reference object in the image. When the angle offset exceeds the threshold value When , the rotating module drives the hub to rotate circumferentially to adjust the circumferential angle of the hub to make it reach the expected angle; the laser marking machine emits a laser to the expected marking position to complete the marking of the hub. The device can realize automatic detection and adjustment of the wheel hub angle, ensure the consistency of the wheel hub marking position in the production line, and improve the production line efficiency and product quality.

Description of drawings

Fig. 1 is the overall structure schematic diagram that the device of the present invention cooperates with the hub;

Fig. 2 is the overall structure schematic diagram of the device of the present invention;

3 is a schematic structural diagram of an angle adjustment mechanism without a rotating mechanism according to the present invention;

4 is a schematic structural diagram of an angle adjustment mechanism with a rotating mechanism according to the present invention;

5 is a schematic diagram of the working principle of the laser marking machine of the present invention;

FIG. 6 is a flow chart of the wheel hub marking method of the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

1. jacking module, 101, jacking table, 102, telescopic cylinder, 103, guide column, 2, centering module, 201, centering drive motor, 202, double-ended screw, 203, centering bracket, 204, roller , 205, transmission belt mechanism, 3, rotary module, 301, rotary drive motor, 302, driving gear, 303, driven gear, 304, worm gear box, 4, first image detection module, 5, trigger module, 6, laser Marking machine, 601, laser source, 602, transflective lens, 603, galvanometer, 604, second image detection module, 7, hub, 8, controller, 9, lighting source, 10, roller, a, Station.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples are only used to explain the present invention, but not to limit the scope of the present invention.

Main Example:

As shown in Figures 1 to 2, a wheel hub marking device provided in this embodiment includes an angle detection mechanism, an angle adjustment mechanism and a laser marking machine 6; the angle adjustment mechanism is arranged on the production line and includes a jacking Module 1, centering module 2 and rotating module 3, the jacking module 1 is provided with a station a for placing the hub 7, the centering module 2 is aligned with the station a and is arranged on the side of the jacking module 1, The rotation module 3 is connected to the jacking module 1 in a driving manner; the angle detection mechanism includes a trigger module 5 and a first image detection module 4 arranged in alignment with the station a, and the trigger module 5 is used to detect the position information of the hub 7 , the first image detection module 4 is used to obtain the image information of the wheel hub 7 according to the position information, and the angle information of the wheel hub 7 is detected according to the image information; the rotation module 3 is used to adjust the angle of the station a according to the angle information; The laser marking machine 6 is arranged above the station a for laser marking after angle adjustment.

The feeding module of the production line adopts roller feeding, and the center of the roller feeding belt is provided with an opening corresponding to the position of the lifting module 1, and the lifting module 1 is arranged in the opening. If the flow direction of the production line is taken as the length direction of the opening, the width direction of the opening is smaller than the diameter of the hub 7 . When the wheel hub 7 flows above the jacking module 1, the jacking module 1 can lift the wheel hub 7 so that it stops flowing with the production line, so as to complete the laser marking process of the device; when the jacking module 1 is not working, the jacking The height of the lifting module 1 is lower than the height of the top surface of the drum 10 , so that the hub 7 can flow to the next process with the rotation of the drum 10 .

The wheel hub 7 to be marked flows to the device of this embodiment with the production line, the trigger module 5 detects that the wheel hub 7 has reached the preset position, and the jacking module 1 lifts the wheel hub 7 away from the drum 10 of the production line. The middle module 2 pushes the wheel hub 7 from the outside to the inside along the radial direction of the wheel hub 7, so that its center point is aligned with the preset position, so that the marking surface of the wheel hub 7 and the reference object of the marking surface (such as the valve core on the wheel hub) Facing the first image detection module 4, the first image detection module 4 captures an image of the wheel hub 7 and calculates the circumferential angle of the wheel hub 7 according to the position of the reference object in the image. When the angle offset exceeds the threshold, the rotation module 3 drives the wheel hub 7 performs circumferential rotation to adjust the circumferential angle of the hub 7 to make it reach the desired angle; the laser marking machine 6 emits laser light to the desired marking position to complete the marking of the hub 7 . The device can realize automatic detection and adjustment of the angle of the wheel hub 7, ensure the consistency of the marking position of the wheel hub 7 in the production line, and improve the production line efficiency and product quality.

On the basis of the above technical solutions, the main embodiment can also be improved as follows.

Example 1:

As shown in Figs. 1-2, in this embodiment, two stations a are arranged in sequence along the flow direction of the production line, that is, two jacking modules 1 arranged in sequence along the production line. A first station a is set on the first lifting module 1, a second station a is set on the second lifting module 1, and each lifting module 1 is provided with a trigger module 5 and a centering Module 2 and rotating module 3 are arranged on the second jacking module 1 . Among them, the first station a is used for angle detection of the hub 7, and the second station a is used for angle adjustment of the hub 7 and laser marking. Specifically, the first image detection module 4 is arranged above the first lifting module 1 and aligned with its station a, and a centering module 2 is arranged below the first lifting module 1, which is used to be hit. The target hub 7 is centered and clamped; a second centering module 2 and a rotation module 3 are arranged below the second jacking module 1 for centering and clamping the hub 7 to be marked and then performing Rotate a certain angle in the circumferential direction, so as to adjust the hub 7 to the desired angle, so that the desired marking position is aligned with the working area of the laser marking machine 6; the laser marking machine 6 is arranged above the second lifting module 1 , and its light emitting direction is toward the marking surface of the hub 7 . When the rotation module 3 adjusts the angle of the hub 7 , the laser marking machine 6 emits laser light according to the preset program to mark the marking surface of the hub 7 .

As shown in FIG. 3 , each of the jacking modules 1 includes a jacking table 101 , a telescopic cylinder 102 and a guide column 103 , the station a is set on the top surface of the jacking table 101 , and the telescopic cylinder 102 is vertical The movable portion of the telescopic cylinder 102 is fixedly connected to the jacking table 101, and the fixed portion of the telescopic cylinder 102 is fixedly arranged through the mounting member; the guide column 103 is arranged parallel to the movable direction of the telescopic cylinder 102. , one end of the guide column 103 is fixedly connected with the jacking platform 101, and the other end thereof is slidably connected with the mounting piece.

The telescopic cylinder 102 drives the jacking table 101 to rise, and lifts the hub 7 that flows to the top surface station a of the jacking table 101 with the production line, so that it is separated from the drum 10 of the production line and stops displacement. During the expansion and contraction of the telescopic cylinder 102 , the guide column 103 guides and prevents rotation of the movable part of the telescopic cylinder 102 , preventing the lifting platform 101 from deflecting during the expansion and contraction process, and interfering with the subsequent detection results of the angle of the hub 7 .

As shown in FIG. 3 , the centering module 2 includes a centering drive motor 201, a double-ended screw 202, two centering brackets 203 and a plurality of rollers 204. The centering drive motor 201 is fixedly arranged, and its output end is connected to the The double-ended screw 202 is connected in a driving manner. The double-ended screw 202 is arranged in parallel with the jacking table 101 . The two centering brackets 203 are symmetrically arranged at both ends of the double-ended screw 202 and are respectively engaged with the threads at both ends of the double-ended screw 202 for transmission. , the axles of the plurality of rollers 204 are mounted on the centering bracket 203, and the wheel surfaces of the rollers 204 are used to match the hub 7; the thread directions at both ends of the double-ended thread are opposite, when the centering drive motor 201 is running, The wheel surfaces of the rollers 204 move towards or away from the hub 7 .

When the centering drive motor 201 drives the double-ended screw 202 to rotate, the threads at both ends of the double-ended screw 202 drive the two centering brackets 203 to move linearly toward or away from the hub 7 at the same time, so that the plurality of rollers on the centering bracket 203 204 The hub 7 is clamped or released. When the roller 204 clamps the hub 7 to the limit position, the position of the hub 7 is at the expected image detection center position, and the centering of the hub 7 is realized. When the wheel hub 7 needs to be released after the detection is completed, the centering drive motor 201 runs in the reverse direction, and then drives the roller 204 to leave the wheel hub 7 to release the wheel hub 7 . When the roller 204 is in contact with the hub 7 , since the wheel surface of the roller 204 is rotatable, it can follow the movement of the hub 7 to rotate adaptively, thereby avoiding the damage to the hub 7 caused by rigid clamping and protecting the hub 7 .

As shown in FIG. 3 and FIG. 4 , the output shaft of the centering drive motor 201 is drivingly connected to the double-ended screw 202 through a transmission belt mechanism 205 . In order to reduce the overall volume of the device and save the space occupied by the equipment, the centering drive motor 201 can be parallel to the double-ended screw 202 and arranged below the double-ended screw 202, and the output shaft of the centering drive motor 201 is connected to the active end of the transmission belt mechanism 205 ( For example, its driving wheel), one end of the double-ended screw 202 is connected to the driven end of the transmission belt mechanism 205 (such as its driven wheel). Since the driving wheel and the driven wheel are driven by the transmission belt, the kinetic energy of the centering drive motor 201 is transmitted to the Double-ended screw 202 . This arrangement can save the lengthwise dimension of the centering module 2 , which is beneficial to the miniaturization of the overall equipment, facilitates subsequent maintenance of the equipment, and avoids interference between various functional modules of the equipment.

As shown in FIG. 4 , the rotation module 3 includes a rotation drive motor 301 , a driving gear 302 and a driven gear 303 , and the output end of the rotation driving motor 301 is drivingly connected to the gear shaft of the driving gear 302 , and the driving gear 302 Meshing with the driven gear 303 , the driven gear 303 is parallel to the jacking table 101 and disposed under the jacking table 101 , and the gear shaft of the driven gear 303 is fixedly connected to the center of the jacking table 101 .

The fixed part of the rotating motor can be fixedly connected to the bottom surface of the jacking table 101 through the connecting piece, so that the entire rotating module 3 can move up and down with the jacking table 101 . When the rotary drive motor 301 is running, the driving gear 302 is driven to rotate. Due to the meshing transmission between the driving gear 302 and the driven gear 303, the driven gear 303 is driven to rotate; when the driven gear 303 rotates, the jacking table 101 is driven around its center position. Circumferential rotation is performed, thereby driving the wheel hub 7 on the jacking platform 101 to rotate, thereby realizing the circumferential angle adjustment of the wheel hub 7 .

As shown in FIG. 4 , the output end of the rotary drive motor 301 is connected to the gear shaft of the driving gear 302 through a worm gear box 304 in a driving manner. With this arrangement, the output shaft of the rotary drive motor 301 can be perpendicular to the axial direction of the driving gear 302, and the rotary drive motor 301 can be arranged on the side of the production line, which is convenient for subsequent maintenance of the device.

As a preferred solution, the trigger module 5 is a position sensor. According to the actual use requirements of the production line, the position sensor can be a contact sensor or a non-direct contact sensor, such as a photoelectric sensor. When the position sensor senses that the hub 7 reaches the designated position, it outputs a trigger signal, thereby triggering the subsequent functional modules such as the jacking module 1 to work. This setting realizes the automatic induction of the workpiece of the hub 7 and triggers the production line to complete the work according to the process, which reduces the workload of the operator, saves the labor cost, and reduces the errors caused by manual operation.

As shown in Figures 1-2, the device further includes a controller 8, the first image detection module 4 is connected with the controller 8 for bidirectional communication, and the output end of the trigger module 5 is correspondingly connected to the input end of the controller 8, The multiple output ends of the controller 8 are respectively connected to the feeding module, the jacking module 1 , the centering module 2 , the rotating module 3 and the laser marking machine 6 .

The controller 8 outputs the feeding control signal to the feeding module according to the position information output by the trigger module 5, the hub 7 centering signal to the centering module 2, the jacking control signal to the jacking module 1, and the first image The detection module 4 outputs an image capture signal; the controller 8 also calculates the circumferential angle of the hub 7 according to the image information output by the first image detection module 4, and compares the circumferential angle with the angle threshold to obtain the angle difference, and according to the unqualified The angle difference of 100000000000000000 output rotation control signal to the rotation module 3, according to the qualified angle difference to output the marking control signal to the laser marking machine 6.

When the hub 7 follows the production line and arrives within the detection range of the trigger module 5, the trigger module 5 detects that the hub 7 is in place and outputs the position information of the hub 7, the feeding module receives the feeding control signal, stops feeding, and the jacking module 1 receives the Raise the signal, lift the wheel hub 7 to be separated from the drum 10, center the wheel hub 7 from the radial direction after receiving the centering signal and clamp it; then, the first image detection module 4 takes a photo of the wheel hub 7, Through the feature extraction of the image, the reference object (such as the valve core) of the wheel hub 7 is identified, and the current angle value of the wheel hub 7 can be calculated by the position of the reference object and the center position of the wheel hub 7, and then the calculated angle value is compared with the preset angle value. The set angle threshold is calculated to obtain the angle difference, and the angle offset of the hub 7 can be obtained through the magnitude and direction of the angle difference. If the angular offset exceeds the allowable tolerance range, the controller 8 converts the angular offset into the rotation angle of the rotary drive motor 301 when the angle adjustment is required, thereby controlling the rotation module 3 to carry the hub 7 to rotate until the hub 7 is rotated. angle is qualified. When the angle value of the wheel hub 7 is qualified, the controller 8 controls the laser marking machine 6 to emit laser for marking, so as to complete the laser marking operation process of the wheel hub 7 . When the laser marking is completed, the jacking module 1 is lowered, the wheel hub 7 is put back into the drum 10, the centering module 2 is released to open the wheel hub 7, the feeding module continues to operate, and the wheel hub 7 that has completed the process is transported away. The target hub 7 is transported to the jacking module 1, and the previous process is repeated.

As shown in FIG. 6 , the laser marking machine 6 includes a laser source 601, a transflective lens 602, a galvanometer 603 and a second image detection module 604. The laser source 601, the galvanometer 603 and the station a are all The second image detection module 604 is arranged on the transmissive surface of the transflective lens 602, and the laser source 601, the galvanometer 603 and the station a are sequentially connected through the optical path; The second image detection module 604 , the transflective lens 602 and the galvanometer 603 are coaxially disposed; the second image detection module 604 is used to image the marking surface of the wheel hub 7 .

The laser source 601 emits laser light for marking, and the reflected light from the reflection surface of the transflective lens 602 passes through the galvanometer 603 and reaches the preset marking position on the marking surface of the hub 7, thereby realizing the marking operation. The optical axis of the second image detection module 604 is arranged coaxially with the laser optical axis of the marking. After the light at the marking position is reflected by the marking point, it sequentially passes through the galvanometer 603 and the transmission surface of the semi-transparent and semi-reflective lens 602 to reach The second image detection module 604 is collected, and the marking surface of the wheel hub is imaged in the second image detection module 604. The operator can monitor the marking status of the marking surface through the image output by the second image detection module 604, and timely Find anomalies and stop losses. In order to obtain a better imaging effect in the second image detection module 604, the illumination light source 9 of the adjacent laser marking machine 6 can also be set to illuminate the marking surface of the wheel hub 7, so that the second image detection module 604 More reflected light on the marking surface is collected to obtain a clearer image of the marking surface of the hub 7.

Embodiment 2:

This embodiment is based on the structure and principle of the first embodiment, and further improvements are made on the basis of the first embodiment.

As shown in Figures 1-2, two stations a are arranged in sequence along the flow direction of the production line, that is, two lifting modules 1 arranged in sequence along the production line. The difference between this embodiment and Embodiment 1 is that in the first A first station a is set on one lifting module 1, and a second station a is set on the second lifting module 1. As shown in the structure diagram of FIG. 4, each lifting module 1 is set on There are trigger module 5 , centering module 2 and rotation module 3 . Among them, the first station a is used for angle detection and angle adjustment of the hub 7 , and the second station a is used for fine adjustment of the angle of the hub 7 and laser marking. Specifically, the first image detection module 4 is arranged above the first lifting module 1 and aligned with its station a to detect the angle of the hub 7 on the first station a; the first lifting module A first centering module 2 and a first rotation module 3 are arranged below the 1 for centering and clamping the hub 7 to be marked, and performing circumferential rotation when the angle of the hub 7 needs to be adjusted, thereby adjusting The angle of the hub 7 (coarse adjustment); the optical axis of the second image detection module 604 is arranged coaxially with the laser optical axis of the marking, and the laser marking machine 6 is arranged above the second jacking module 1 and is aligned with its work. Position a is set, and the second image detection module 604 is used to detect the angle of the hub 7 on the second station a again through the image, and to detect the quality of the laser marking; The centering module 2 and the second rotation module 3 are used to center and clamp the hub 7 to be marked and then perform circumferential rotation to fine-tune the angle, so as to adjust the hub 7 to the desired angle, so that the laser The working area of the marking machine 6 is aligned with the expected marking position; the light-emitting direction of the laser marking machine 6 is towards the marking surface of the hub 7. After the rotation module 3 adjusts the angle of the hub 7, the laser marking machine 6 follows the The preset program emits a laser to mark the marking surface of the hub 7 .

When the device is working, the wheel hub 7 to be marked flows to the device of this embodiment with the production line. After the first trigger module 5 detects the position information of the wheel hub 7, the first jacking module 1 lifts the wheel hub 7 up. Then, the centering module 2 at the first lifting module 1 acts to center and clamp the wheel hub 7, and the first image detection module 4 takes a photo of the wheel hub 7 and passes the image The feature extraction calculates the angle information of the wheel hub 7 , and when the angle is unqualified, the first rotation module 3 drives the wheel hub 7 to rotate, so as to perform the first angle adjustment on the wheel hub 7 . After the angle adjustment is completed, the first centering module 2 releases the wheel hub 7, the jacking module 1 descends, and puts the wheel hub 7 back on the drum 10, and the wheel hub 7 flows along the drum 10 to the second station a. At this time, the trigger module 5 at the second station a detects the position information of the wheel hub 7, and the second lift module 1 rises to lift the wheel hub 7 again. The second centering module 2 acts to drive the wheel hub 7. Centering and clamping the circumferential direction of the hub 7, the second image detection module 604 takes a photo of the hub 7 and calculates the angle information of the hub 7 again through image feature extraction. If the angle of the hub 7 is still unqualified, the second rotation When the mechanism is running, the wheel hub 7 is driven to fine-tune the angle, so as to ensure the angular accuracy of the wheel hub 7 marking. After the fine adjustment of the angle is completed, the laser marking machine 6 outputs laser to carry out laser marking on the hub 7 . After the marking is completed, the second image detection module 604 can also take pictures of the hub 7 to check whether the marking quality is up to standard, so as to detect defective products in time and stop losses in time.

The device of this embodiment can not only realize automatic detection and adjustment of the angle of the hub 7, but also recheck and fine-tune the angle of the hub 7 before marking, so as to better ensure the consistency of the marking position of the hub 7 in the production line , improve production line efficiency and product quality.

Embodiment three:

Based on the above-mentioned device embodiment, the present embodiment also provides a wheel hub marking method, which is used to perform laser marking on a fixed angle marking position on the wheel hub 7 . As shown in the flowchart of Figure 6, the steps of the method are as follows:

S1, obtain the position information of the hub 7 to be marked, and sequentially stop the displacement of the hub 7 according to the position information, adjust the height of the hub 7, and align the center of the hub 7 to a preset position;

S2, obtain the image information of the hub 7 to be marked, extract the position information of the reference object according to the image information, calculate the circumferential angle information of the hub 7 according to the position information of the reference object, and make the difference between the angle information and the angle threshold, Obtain the angle difference of the belt direction, if the angle difference exceeds the angle difference threshold range, then rotate the hub 7 to adjust its circumferential angle;

S3, carry out laser marking on the hub 7, and check the marking quality through the image.

In this embodiment, in order to obtain a more accurate angle adjustment effect, step S2 may be repeated and then step S3 may be performed.

The method of this embodiment can realize automatic detection and adjustment of the angle of the wheel hub 7, ensure the consistency of the marking position of the wheel hub 7 in the production line, and improve the production line efficiency and product quality.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. The hub marking device is characterized by comprising an angle detection mechanism, an angle adjusting mechanism and a laser marking machine (6); the angle adjusting mechanism is arranged on a production line and comprises a jacking module (1), a centering module (2) and a rotating module (3), wherein a station (a) is arranged on the jacking module (1), the centering module (2) is aligned to the station (a) and arranged on the side surface of the jacking module (1), and the rotating module (3) is in transmission connection with the jacking module (1); the angle detection mechanism comprises a trigger module (5) and a first image detection module (4) which are arranged in alignment with a station (a), the trigger module (5) is used for detecting the position information of the hub (7), and the first image detection module (4) is used for acquiring the image information of the hub (7) according to the position information and detecting the angle information of the hub (7) according to the image information; the rotating module (3) is used for adjusting the angle of the station (a) according to the angle information; the laser marking machine (6) is arranged above the station (a) and used for carrying out laser marking after angle adjustment.

2. The hub marking device according to claim 1, wherein the jacking module (1) comprises a jacking table (101), a telescopic cylinder (102) and a guide post (103), the station (a) is arranged on the top surface of the jacking table (101), the telescopic cylinder (102) is vertically arranged below the jacking table (101), a movable part of the telescopic cylinder (102) is fixedly connected with the jacking table (101), and a fixed part of the telescopic cylinder (102) is fixedly arranged through a mounting piece; the guide post (103) is arranged parallel to the moving direction of the telescopic cylinder (102), one end of the guide post (103) is fixedly connected with the jacking table (101), and the other end of the guide post is connected with the mounting piece in a sliding mode.

3. The hub marking device according to claim 2, wherein the centering module (2) comprises a centering driving motor (201), a double-headed screw (202), two centering brackets (203) and a plurality of rollers (204), the centering driving motor (201) is fixedly arranged, the output end of the centering driving motor is in transmission connection with the double-headed screw (202), the double-headed screw (202) is arranged in parallel with the jacking table (101), the two centering brackets (203) are symmetrically arranged at two ends of the double-headed screw (202) and are in transmission engagement with the threads of the double-headed screw (202), the axles of the plurality of rollers (204) are arranged on the centering brackets (203), and the wheel surfaces of the rollers (204) are used for being matched with the hub (7); the thread directions of two ends of the double-thread are opposite, and when the centering driving motor (201) runs, the wheel surface of the roller (204) moves towards or away from the hub (7).

4. The hub marking device according to claim 3, wherein an output shaft of the centering driving motor (201) is in transmission connection with the double-headed screw (202) through a transmission belt mechanism (205).

5. The hub marking device according to claim 3 or 4, wherein the rotating module (3) comprises a rotating driving motor (301), a driving gear (302) and a driven gear (303), an output end of the rotating driving motor (301) is in transmission connection with a gear shaft of the driving gear (302), the driving gear (302) is meshed with the driven gear (303), the driven gear (303) is parallel to the jacking table (101) and is arranged below the jacking table (101), and a gear shaft of the driven gear (303) is fixedly connected with the center of the jacking table (101).

6. Hub marking device according to claim 5, characterized in that the output of the rotary drive motor (301) is in drive connection with the gear shaft of the drive gear (302) via a worm gear box (304).

7. Marking device for a hub according to claim 1, characterized in that the triggering module (5) is a position sensor.

8. The hub marking device according to claim 1, further comprising a controller (8), and a controller (8), wherein the first image detection module (4) is in bidirectional communication with the controller (8), the output end of the trigger module (5) is connected to the input end of the controller (8), and a plurality of output ends of the controller (8) are respectively and correspondingly connected to the feeding module, the jacking module (1), the centering module (2), the rotating module (3) and the laser marking machine (6);

the controller (8) outputs a feeding control signal to the feeding module, a hub (7) centering signal to the centering module (2), a jacking control signal to the jacking module (1) and an image shooting signal to the first image detection module (4) according to the position information; the controller (8) also calculates the circumferential angle of the hub (7) according to the image information, compares the circumferential angle with an angle threshold value to obtain an angle difference value, outputs a rotation control signal to the rotation module (3) according to the unqualified angle difference value, and outputs a marking control signal to the laser marking machine (6) according to the qualified angle difference value.

9. The hub marking device according to claim 1, wherein the laser marking machine (6) comprises a laser source (601), a semi-transparent and semi-reflective lens (602), a galvanometer (603) and a second image detection module (604), the laser source (601), the galvanometer (603) and the station (a) are arranged on a reflecting surface of the semi-transparent and semi-reflective lens (602), and the laser source (601), the galvanometer (603) and the station (a) are sequentially connected through an optical path; the second image detection module (604) is arranged on the transmission surface of the semi-transparent and semi-reflective lens (602), and the second image detection module (604), the semi-transparent and semi-reflective lens (602) and the galvanometer (603) are coaxially arranged; the second image detection module (604) is used for detecting whether the laser marking quality is qualified or not through images.

10. A method of marking a hub, comprising:

s1, acquiring the position information of the hub to be marked, stopping the displacement of the hub, adjusting the height of the hub and aligning the center of the hub to a preset position according to the position information;

s2, acquiring image information of a hub to be marked, extracting position information of a reference object according to the image information, calculating circumferential angle information of the hub according to the position information of the reference object, subtracting the angle information from an angle threshold value to obtain an angle difference value in a belt direction, and rotating the hub to adjust the circumferential angle if the angle difference value exceeds the angle difference value threshold range;

and S3, carrying out laser marking on the hub, and detecting the marking quality through the image.

Images