CN104656555A - Intelligent milling cutter system based on RFID (Radio Frequency Identification) technology - Google Patents

Abstract

The invention discloses an intelligent milling tool system based on RFID technology, which includes a main shaft installed on a base of a machine tool, a tool handle is installed on the main shaft, a tool is installed on the tool handle, and a primary unit is fixedly installed on the base. A secondary unit is fixedly installed on the handle, and a sensor unit is fixedly installed on the tool. The sensor unit is installed near the cutting edge of the tool. The sensor unit and the secondary unit are connected by wires; the sensor unit is used for cutting The physical quantity of the tool is sensed in real time during the process; the secondary unit is used to sample the physical quantity sensed by the sensing unit online and transmit it to the primary unit through the wireless transmission channel; the primary unit is used to generate radio frequency carrier waves and obtain the data transmitted by the secondary unit in the wireless transmission channel data. This system completes the simultaneous transmission of energy and data through the same transmission channel, which makes the system structure simpler, has more physical quantities to perceive, and fast transmission speed. It can also identify the identity of the tool and is compatible with the intelligent tool management system.

Description

An Intelligent Milling Tool System Based on RFID Technology

technical field

The invention belongs to the field of intelligent cutting tools, and more specifically relates to an intelligent milling cutting tool system based on RFID technology.

Background technique

In the processing process, in order to better ensure the quality of the processed parts, it is necessary to monitor various physical quantities in the processing process online in real time; more and more intelligent tools are developed for the characteristics of milling processing; the existing intelligent milling tools It mainly uses Bluetooth plus lithium battery, surface acoustic wave and other technologies, or uses different transmission channels to realize the transmission of detection data and energy.

However, further research shows that there are many deficiencies in the existing milling intelligent tool system. First, the way of wireless transmission module and battery will make the energy not be replenished in time, so that the intelligent tool cannot work continuously and even the monitoring system is abnormal. Second, the materials used in surface acoustic wave technology are more easily damaged, the process is more complicated, and the physical quantity sensed at the same time is less; thirdly, the separate channel transmission of energy and data will make the system more complicated, the cost is higher, and the power consumption is lower. and the current intelligent tool system can only sense the physical quantity of cutting, but cannot be compatible with the existing intelligent tool management system, thus restricting the development of ultra-precision machining and intelligent manufacturing.

Contents of the invention

In view of the above defects or improvement needs of the prior art, the present invention provides an intelligent milling tool system based on RFID technology, the purpose of which is to realize energy and data sharing the same wireless transmission channel in the application where the relative rotation is not suitable for erecting connection lines. Transmission solves various problems existing in traditional intelligent milling tools, and has many advantages such as simple structure, sustainable work, multiple perceived physical quantities, strong real-time performance, compatibility with tool management systems, low cost, and ease of use.

In order to achieve the above object, according to one aspect of the present invention, an intelligent milling tool system based on RFID technology is provided, including a main shaft installed on the base of the machine tool, a tool handle is installed on the main shaft, and a tool is installed on the tool handle. A primary unit is fixedly installed on the base, a secondary unit is fixedly installed on the handle, a sensor unit is fixedly installed on the tool, the sensor unit is installed near the cutting edge of the tool, and the sensor unit It is connected with the secondary unit through wires; among them, the sensing unit is used to sense the physical quantity of the tool in real time during the cutting process; the secondary unit is used to sample the physical quantity sensed by the sensing unit online and transmit it to the primary unit through a wireless transmission channel; the primary The unit is used to generate radio frequency carrier and obtain the data transmitted by the secondary unit in the wireless transmission channel.

Preferably, when transmitting data, the secondary unit can obtain carrier energy in the wireless transmission channel and convert it to power itself.

Preferably, the secondary unit stores tool identity information, and the primary unit can read and write the tool identity information stored in the secondary unit through a query.

Preferably, the sensing unit is preferably an embedded sensor or a thin film sensor.

Preferably, the primary unit includes a primary bracket and a primary circuit board fixedly installed on the base, the tool handle is connected to the main shaft after passing through the primary bracket, a primary coil bracket is installed on the primary bracket, and the primary coil bracket is wound There is a primary coil, and both ends of the primary coil are connected to the primary circuit board; the primary coil is used to form a wireless transmission channel, and the primary circuit board is used for data inquiry, carrier energy transmission and data processing.

Preferably, the primary coil support is screwed on the primary support, and the distance between the primary coil and the secondary unit can be adjusted by twisting the primary coil support.

Preferably, the secondary unit includes a secondary bracket fixedly sleeved on the outside of the knife handle, a secondary circuit board and a secondary coil bracket are installed on the secondary bracket, and a secondary coil is wound on the secondary coil bracket, The two ends of the secondary coil are connected to the secondary circuit board; the secondary circuit board is used for collecting sensing data sensed by the sensing unit, receiving energy, processing data and storing tool identity information; the secondary coil is used for To form a wireless transmission channel.

Preferably, the secondary coil support is screwed on the secondary support, and the distance between the secondary coil and the primary unit can be adjusted by twisting the secondary coil support.

Preferably, the secondary circuit board is mounted on an end of the secondary bracket close to the sensing unit.

Preferably, the primary coil and/or the secondary coil are wound from Litz wire.

Generally speaking, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

1) Simple structure and sustainable work: the system completes the transmission of energy and data through the same transmission channel, making the system structure simpler;

2) Multiple sensing physical quantities and strong real-time performance: the diversity of sensing unit types can realize multiple physical quantities in the cutting tool cutting process at the same time, and the high-frequency electromagnetic field enables data to reach a higher transmission rate, thereby ensuring real-time transmission of the perceived physical quantities;

3) Compatible tool management system: the system stores tool identity information that can be queried in real time, and is compatible with existing tool management systems;

4) Low cost and easy to use: the simplification of the system structure and the simplification of the process greatly reduce the cost of the system and are easy to operate;

5) The secondary unit can continuously obtain energy while communicating to ensure the sustainable operation of the system.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of secondary unit among the present invention;

Fig. 3 is a schematic structural diagram of the primary unit in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

As shown in Figures 1 to 3, an intelligent milling tool system based on RFID technology includes a main shaft installed on the base 1 of the machine tool, a tool handle 2 is installed on the main shaft, and a tool 3 is installed on the tool handle 2. A primary unit 4 is fixedly installed on the base 1, a secondary unit 5 is fixedly installed on the handle 2, and a sensor unit 6 is fixedly installed on the tool 3. Preferably, the sensor unit 6 is preferably An embedded sensor or a film sensor is used to detect the physical quantity of the tool 3 . The sensing unit 6 is installed near the cutting edge 31 of the tool 3, and the sensing unit 6 should be as close to the cutting edge 31 as possible so that the detection result is closer to the actual value. The sensing unit 6 is connected to the secondary unit 5 through a wire 7; wherein, the sensing unit 6 is used to sense the physical quantity of the tool 3 in real time during the cutting process. The sensing unit 6 includes sensors such as a temperature sensor and/or a stress sensor and/or a torque sensor, which can detect physical quantities such as temperature and/or stress and/or torque near the cutting edge 31 on the tool 3; the secondary unit 5 is used for The physical quantity sensed by the sensing unit 6 is sampled online and transmitted to the primary unit 4 through a wireless transmission channel; the primary unit 4 is used to generate radio frequency carrier waves and acquire data transmitted by the secondary unit 5 in the wireless transmission channel.

The cutter 3, the sensing unit 6, the handle 2 and the secondary unit 5 of the present invention rotate synchronously, so the wire 7 will not be torn off due to the pulling force, and the secondary unit 5 can receive the cutter 3 returned on the sensing unit 6 physical quantities such as temperature and/or stress and/or torque. In addition, although the secondary unit 5 rotates relative to the base 1 and the primary unit 4 is stationary relative to the base, the secondary unit 5 and the primary unit 4 are not connected through conductive wires, but communicate through RFID technology, and the two can Communication is done well without being affected by the rotation of the tool 3 . However, the secondary unit 5 and the primary unit 4 of the present invention realize wireless connection through RFID technology, and realize energy and data sharing the same wireless transmission channel for transmission in the application where the relative rotation is not suitable for erecting a connection line, the structure is simplified, and the system cost is greatly reduced. cost and easy to operate.

Further, when the secondary unit 5 transmits data, it can obtain the carrier energy in the wireless transmission channel and convert it to power itself. There is no need to install batteries in the secondary unit 5, which avoids the problem of increasing the volume of the secondary unit 5 caused by installing batteries, and also avoids the problem that the system cannot continue to work due to battery replacement.

Further, the tool identity information is stored in the secondary unit 5, and the primary unit 4 can read and write the tool identity information stored in the secondary unit 5 through an inquiry, and the tool identity information can be inquired by the external tool 3 management system. It can be read and modified in a way, so that it can be compatible with the existing tool management system and realize the intelligent management of tools.

Further, the primary unit 4 includes a primary bracket 41 fixedly installed on the base 1 and a primary circuit board 42 , the primary bracket 41 is in the shape of a rotating body. The handle 2 is connected to the main shaft after passing through the primary bracket 41. The primary coil bracket 43 is installed on the primary bracket 41. The primary coil bracket 43 is wound with a primary coil 44. Both ends of the primary coil 44 are connected to the primary circuit board. 42 ; the primary coil 44 is used to form a wireless transmission channel, and the primary circuit board 42 is used for data inquiry, carrier energy transmission and data processing.

Further, the secondary unit 5 includes a secondary bracket 51 fixedly sleeved on the outside of the knife handle 2, a secondary circuit board 52 and a secondary coil bracket 53 are mounted on the secondary bracket 51, and the secondary coil bracket 53 is Wrapped with a secondary coil 54, the two ends of the secondary coil 54 are connected to the secondary circuit board 52, and the wire 7 is connected to the secondary circuit board 52; the secondary circuit board 52 is used for collecting the sensing unit 6 Sensing data, carrier energy reception, data processing and storage of tool identity information; the secondary coil 54 is used to form a wireless transmission channel.

As preferably, the primary coil support 43 is threaded on the primary support 41, and the distance between the primary coil 44 and the secondary coil 54 can be adjusted by twisting the primary coil support 43; the secondary coil support 53 is threaded on the secondary support 51, and twisted The secondary coil support 53 can adjust the distance between the secondary coil 54 and the primary coil 44 , which facilitates better communication between the primary unit 4 and the secondary unit 5 .

In addition, the secondary circuit board 52 is installed at one end of the secondary bracket 51 close to the sensing unit 6 , so that the wire 7 thereof connects the secondary circuit board 52 and the sensing unit 6 together.

Preferably, the primary coil 44 and/or the secondary coil 54 are wound with Litz wires to form a stable wireless transmission channel.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention, All should be included within the protection scope of the present invention.

Claims (10)

1. the intelligent milling cutter system based on RFID technique, comprise be arranged on lathe pedestal (1) on main shaft, main shaft is provided with handle of a knife (2), handle of a knife (2) is provided with cutter (3), it is characterized in that: described pedestal (1) is installed with primary unit (4), described handle of a knife (2) is installed with secondary units (5), described cutter (3) is installed with sensing unit (6), sensing unit (6) is arranged on the position of the cutting edge (31) near cutter (3), sensing unit (6) is connected by wire (7) with secondary units (5), wherein, sensing unit (6) is for the physical quantity of real-time perception cutter (3) in the process of cutting, secondary units (5) for on-line sampling sensing unit (6) perception physical quantity and transmitted to primary unit (4) by wireless transfer channel, primary unit (4) is for generation of radio-frequency carrier and in wireless transfer channel, obtain the data that secondary units (5) transmits.

2. a kind of intelligent milling cutter system based on RFID technique according to claim 1, is characterized in that: described secondary units (5) can obtain the carrier energy in wireless transfer channel and change to power itself when transmitting data.

3. a kind of intelligent milling cutter system based on RFID technique according to claim 1, it is characterized in that: the interior storing cutter identity information of described secondary units (5), primary unit (4) reads and writes by the mode of addressing inquires to the cutter identity information be stored in secondary units (5).

4. a kind of intelligent milling cutter system based on RFID technique according to claim 1, is characterized in that: described sensing unit (6) is preferably embedded type sensor or thin film sensor.

5. a kind of intelligent milling cutter system based on RFID technique according to claim 1, it is characterized in that: described primary unit (4) comprises and is fixedly installed in primary stent (41) on pedestal (1) and primary circuit plate (42), described handle of a knife (2) is through being connected on main shaft after primary stent (41), primary stent (41) is provided with primary coil support (43), primary coil support (43) is wound with primary coil (44), the two ends of primary coil (44) are all connected on primary circuit plate (42), primary coil (44) is for forming wireless transfer channel, and primary circuit plate (42) is for the process of the inquiry of data, the transmission of carrier energy and data.

6. a kind of intelligent milling cutter system based on RFID technique according to claim 5, it is characterized in that: primary coil support (43) is threaded on primary stent (41), turn the distance that primary coil support (43) can regulate primary coil (44) and secondary units (5).

7. a kind of intelligent milling cutter system based on RFID technique according to claim 1, it is characterized in that: described secondary units (5) comprises the fixedly sleeved secondary support (51) in handle of a knife (2) outside, described secondary support (51) is provided with secondary circuit board (52) and secondary coil support (53), secondary coil support (53) is wound with secondary coil (54), two ends of described secondary coil (54) are connected to secondary circuit board (52); Secondary circuit board (52) is for gathering the sensing data of sensing unit (6) perception, the reception of energy and the process of data and storing cutter identity information; Secondary coil (54) is for forming wireless transfer channel.

8. a kind of intelligent milling cutter system based on RFID technique according to claim 7, it is characterized in that: secondary coil support (53) is threaded on secondary support (51), turn the distance that secondary coil support (53) can regulate secondary coil (54) and primary unit (4).

9. a kind of intelligent milling cutter system based on RFID technique according to claim 7, is characterized in that: described secondary circuit board (52) is arranged on one end of the close sensing unit (6) of secondary support (51).

10. a kind of intelligent milling cutter system based on RFID technique according to claim 1, is characterized in that: described primary coil (44) and/or secondary coil (54) form for litz wire coiling.