Double-arc TIG welding control mainboard

Abstract

The utility model discloses a double-arc TIG welding control mainboard which comprises a welding control mainboard body, and a 32-bit main control chip, a first two-axis motion chip, a second two-axis motion chip, a first communication chip, a second communication chip, a third communication chip and a power conversion chip are fixedly arranged on the surface of the welding control mainboard body. A first serial port of the 32-bit main control chip is connected with the first communication chip, a second serial port of the 32-bit main control chip is connected with the second communication chip, the welding control mainboard integrates the 32-bit main control chip and the two two-axis motion chips, the two-axis motion chips have the functions of linear interpolation, arc interpolation and the like, and the two-axis motion chips have the functions of linear interpolation, arc interpolation and the like. The 32-bit main control chip sends a motion control command, the two-axis motion chip is responsible for executing the motion of a motion axis, and the welding control mainboard can control the two welding arcs and accurately control the waveforms of the two welding arcs according to the welding requirement.

Description

Technical Field

[0001] The utility model relates to the field of welding control mainboards, in particular to a double arc TIG welding control mainboard. Background Art

[0002] In the domestic nuclear power, aerospace, military industry and other fields, the main market share is occupied by foreign companies. Their core technology is the power control core board developed by themselves. In the civilian market, domestic equipment manufacturers mainly use programmable logic controllers (PLCs) as the control core of welding power supplies. However, the welding control system developed with PLC has the disadvantages of low welding current and voltage control accuracy, few controllable welding waveforms, and low welding reliability. In addition, in the existing technology, one control motherboard can only control one welding arc, but not two welding arcs.

[0003] In order to solve the above problems, a dual arc TIG welding control motherboard is proposed here. Utility Model Content

[0004] The purpose of the utility model is to provide a dual arc TIG welding control mainboard to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dual arc TIG welding control mainboard, comprising a welding control mainboard body, a 32-bit main control chip, a first two-axis motion chip, a second two-axis motion chip, a first communication chip, a second communication chip, a third communication chip and a power conversion chip are fixedly arranged on the surface of the welding control mainboard body, the first serial port of the 32-bit main control chip is connected to the first communication chip, the second serial port of the 32-bit main control chip is connected to the second communication chip, the third serial port of the 32-bit main control chip is connected to the third communication chip, a network port is arranged on one side of the welding control mainboard body, the first two-axis motion chip is connected to a wire feeding shaft and a rotating shaft, and the second two-axis motion chip is connected to a swing shaft and an arc pressure shaft.

[0006] The welding control motherboard integrates a 32-bit main control chip and two two-axis motion chips. The two-axis motion chip has functions such as linear interpolation and circular interpolation. The 32-bit main control chip issues motion control commands, and the two-axis motion chip is responsible for executing the movements of the motion axis. The welding control motherboard can control two welding arcs and accurately control the waveforms of the two welding arcs according to welding needs. The 32-bit main control chip controls the welding power supply control circuit 1, the welding power supply control circuit 2 and the hot wire power supply control circuit through the ttl signal, which can control the current and pulse time of the welding power supply and the current and pulse time of the hot wire power supply, and collect relevant Current, voltage and other signals, through the coordinated setting of DeviceNet bus, Ethernet / IP bus and EtherCAT bus, enable the welding control mainboard to communicate with the motion controllers of various manufacturers through the network port, thereby realizing powerful multi-axis motion welding automation equipment. The first communication chip converts the TTL level into the RS232 signal level to communicate with the external touch screen, the second communication chip converts the TTL level into the RS232 signal level to communicate with the printer, and the third communication chip converts the TTL level into the RS485 signal level to communicate with the hand control box.

[0007] Preferably, the model of the 32-bit main control chip is stm32f407. The 32-bit main control chip 2 can control the current and pulse time of the welding power supply and the current and pulse time of the hot wire power supply, and collect relevant current, voltage and other signals.

[0008] Preferably, the network port is connected to the DeviceNet bus, Ethernet / IP bus and EtherCAT bus. Through the coordinated setting of the DeviceNet bus, Ethernet / IP bus and EtherCAT bus, the welding control main board body can communicate with the motion controllers of various manufacturers through the network port, thereby realizing powerful multi-axis motion welding automation equipment.

[0009] Preferably, the first two-axis motion chip and the second two-axis motion chip are both connected to the 32-bit master control chip through a 16-bit parallel bus, and the setting of a 16-bit parallel bus facilitates communication between the 32-bit master control chip and the first two-axis motion chip and the second two-axis motion chip.

[0010] Preferably, a current and voltage sampling signal interface, a first power supply control signal interface, a second power supply control signal interface and a hot wire control signal interface are provided on one side of the welding control main board body, and the control main board is provided with a current and voltage sampling signal interface, a first power supply control signal interface, a second power supply control signal interface and a hot wire control signal interface, so that the 32-bit main control chip can control two welding power supply control circuits and a hot wire power supply control circuit through a TTL signal.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The welding control motherboard integrates a 32-bit main control chip and two two-axis motion chips. The two-axis motion chip has functions such as linear interpolation and circular interpolation. The 32-bit main control chip issues motion control commands, and the two-axis motion chip is responsible for executing the movements of the motion axis. The welding control motherboard can control two welding arcs and accurately control the waveforms of the two welding arcs according to welding needs. The 32-bit main control chip controls the welding power supply control circuit 1, the welding power supply control circuit 2 and the hot wire power supply control circuit through the ttl signal, which can control the current and pulse time of the welding power supply and the current and pulse time of the hot wire power supply, and collect relevant Current, voltage and other signals, through the coordinated setting of DeviceNet bus, Ethernet / IP bus and EtherCAT bus, enable the welding control mainboard to communicate with the motion controllers of various manufacturers through the network port, thereby realizing powerful multi-axis motion welding automation equipment. The first communication chip converts the TTL level into the RS232 signal level to communicate with the external touch screen, the second communication chip converts the TTL level into the RS232 signal level to communicate with the printer, and the third communication chip converts the TTL level into the RS485 signal level to communicate with the hand control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the principle diagram of the utility model.

[0014] In the figure: 1. welding control main board; 2. 32-bit main control chip; 3. first two-axis motion chip; 4. second two-axis motion chip; 5. first communication chip; 6. second communication chip; 7. third communication chip; 8. network port; 9. DeviceNet bus; 10. Ethernet / IP bus; 11. EtherCAT bus; 12. swing axis; 13. arc pressure axis; 14. wire feeding axis; 15. rotating axis; 16. power conversion chip; 17. 16-bit parallel bus; 18. current and voltage sampling signal interface; 19. first power control signal interface; 20. second power control signal interface; 21. hot wire control signal interface. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] See also Figure 1The utility model provides a dual arc TIG welding control motherboard, including a welding control motherboard body 1, a 32-bit main control chip 2, a first two-axis motion chip 3, a second two-axis motion chip 4, a first communication chip 5, a second communication chip 6, a third communication chip 7 and a power conversion chip 16 are fixedly arranged on the surface of the welding control motherboard body 1, a first serial port of the 32-bit main control chip 2 is connected to the first communication chip 5, a second serial port of the 32-bit main control chip 2 is connected to the second communication chip 6, and a third serial port of the 32-bit main control chip 2 is connected to the third communication chip 7, a network port 8 is arranged on one side of the welding control motherboard body 1, the first two-axis motion chip 3 is connected to a wire feeding shaft 14 and a rotating shaft 15, and the second two-axis motion chip 4 is connected to a swing shaft 12 and an arc pressure shaft 13, the welding control motherboard integrates a 32-bit main control chip 2 and two two-axis motion chips, the two-axis motion chip has functions such as linear interpolation and circular interpolation, the 32-bit main control chip 2 issues a motion control command, and the two-axis motion chip is responsible for executing the action of the motion axis, so that The welding control mainboard can control two welding arcs, and according to the welding needs, accurately control the waveforms of the two welding arcs. The 32-bit main control chip 2 controls the welding power supply control circuit 1, the welding power supply control circuit 2 and the hot wire power supply control circuit through the TTL signal, and can control the welding power supply, the welding current and pulse time of the welding power supply, and the current and pulse time of the hot wire power supply, and collect relevant current, voltage and other signals. Through the coordinated setting of the DeviceNet bus 9, the Ethernet / IP bus 10 and the EtherCAT bus 11, the welding control mainboard body 1 can communicate with the motion controllers of various manufacturers through the network port 8, so as to realize powerful multi-axis motion welding automation equipment. The first communication chip 5 converts the TTL level into the RS232 signal level to communicate with the external touch screen, the second communication chip 6 converts the TTL level into the RS232 signal level to communicate with the printer, and the third communication chip 7 converts the TTL level into the RS485 signal level to communicate with the hand control box.

[0017] The model of the 32-bit main control chip 2 is stm32f407, the network port 8 is connected to the DeviceNet bus 9, the Ethernet / IP bus 10 and the EtherCAT bus 11, and one side of the welding control mainboard body 1 is provided with a current and voltage sampling signal interface 18, a first power supply control signal interface 19, a second power supply control signal interface 20 and a hot wire control signal interface 21;

[0018] When in use, the control mainboard is provided with a current and voltage sampling signal interface 18, a first power supply control signal interface 19, a second power supply control signal interface 20 and a hot wire control signal interface 21, so that the 32-bit main control chip 2 can control two welding power supply control circuits and a hot wire power supply control circuit through a ttl signal, can control the current and pulse time of the welding power supply and the current and pulse time of the hot wire power supply, and collect relevant current, voltage and other signals. Through the coordinated setting of the DeviceNet bus 9, the Ethernet / IP bus 10 and the EtherCAT bus 11, the welding control mainboard body 1 can communicate with motion controllers of various manufacturers through the network port 8, thereby realizing a powerful multi-axis motion welding automation equipment;

[0019] The first two-axis motion chip 3 and the second two-axis motion chip 4 are both connected to the 32-bit main control chip 2 via a 16-bit parallel bus 17;

[0020] When in use, the 16-bit parallel bus 17 is provided to facilitate the communication between the 32-bit main control chip 2 and the first two-axis motion chip 3 and the second two-axis motion chip 4 .

[0021] When the embodiment of the present application is in use: the welding control mainboard integrates a 32-bit main control chip 2 and two two-axis motion chips, the two-axis motion chip has functions such as linear interpolation and circular arc interpolation, the 32-bit main control chip 2 issues motion control commands, and the two-axis motion chip is responsible for executing the movements of the motion axes, so that the welding control mainboard can control two welding arcs and accurately control the waveforms of the two welding arcs according to welding needs. The control mainboard is provided with a current and voltage sampling signal interface 18, a first power supply control signal interface 19, a second power supply control signal interface 20 and a hot wire control signal interface 21, so that the 32-bit main control chip 2 can control two welding power supply control circuits and a hot wire power supply control circuit through a ttl signal, and can control welding The current and pulse time of the power supply and the current and pulse time of the hot wire power supply are collected, and related current, voltage and other signals are collected. Through the coordinated setting of the DeviceNet bus 9, the Ethernet / IP bus 10 and the EtherCAT bus 11, the welding control main board body 1 can communicate with the motion controllers of various manufacturers through the network port 8, so as to realize a powerful multi-axis motion welding automation equipment. The first communication chip 5 converts the ttl level into the rs232 signal level to communicate with the external touch screen, the second communication chip 6 converts the ttl level into the rs232 signal level to communicate with the printer, and the third communication chip 7 converts the ttl level into the rs485 signal level to communicate with the hand control box;

[0022] Among them, when controlling the rotating motor, the 32-bit main control chip 2 communicates with the first two-axis motion chip 3 through the 16-bit parallel bus 17, and issues a rotating motor rotation command. The first two-axis motion chip 3 controls the rotating motor to rotate upon receiving the rotation command, and samples the feedback signal of the motor encoder at the same time, and dynamically adjusts the output of the motor to ensure the stability of the rotation speed. When controlling the wire feeding motor, the 32-bit main control chip 2 communicates with the first two-axis motion chip 3 through the 16-bit parallel bus 17, and issues a rotating motor rotation command. The first two-axis motion chip 3 controls the rotation of the motor upon receiving the wire feeding command, and samples the feedback signal of the motor encoder at the same time, and dynamically adjusts the output of the motor to ensure the stability of the wire feeding speed. The encoder signal is sampled through the high-speed pulse sampling circuit. The PID operation of the main control MCU controls the speed of the rotating motor in a closed loop, and has the advantages of stable welding wire feeding speed and high precision. When controlling the arc pressure motor, the 32-bit main control chip 2 communicates with the second two-axis motion chip 4 through the 16-bit parallel bus 17. By sampling the arc voltage, the 32-bit main control chip 2 issues an arc pressure motor control command during the welding process, and moves the second two-axis motion chip 4 to dynamically adjust the arc voltage height according to the command, so that the tungsten electrode maintains a relatively constant height relative to the workpiece, thereby ensuring the welding quality. When controlling the swing motor, the 32-bit main control chip 2 communicates with the second two-axis motion chip 4 through the 16-bit parallel bus 17. During the welding process, the 32-bit main control chip 2 issues a swing motor control command to control the width and speed of the tungsten electrode swing during the welding process.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual arc TIG welding control mainboard, comprising a welding control mainboard body (1), characterized in that: A 32-bit main control chip (2), a first two-axis motion chip (3), a second two-axis motion chip (4), a first communication chip (5), a second communication chip (6), a third communication chip (7) and a power conversion chip (16) are fixedly arranged on the surface of the welding control main board body (1); the first serial port of the 32-bit main control chip (2) is connected to the first communication chip (5); the second serial port of the 32-bit main control chip (2) is connected to the second communication chip (6); the third serial port of the 32-bit main control chip (2) is connected to the third communication chip (7); a network port (8) is arranged on one side of the welding control main board body (1); the first two-axis motion chip (3) is connected to a wire feeding shaft (14) and a rotating shaft (15); and the second two-axis motion chip (4) is connected to a swing shaft (12) and an arc pressure shaft (13).

2. The dual arc TIG welding control mainboard according to claim 1, characterized in that: The model of the 32-bit main control chip (2) is stm32f407.

3. The dual arc TIG welding control mainboard according to claim 1, characterized in that: The network port (8) is connected to a DeviceNet bus (9), an Ethernet / IP bus (10) and an EtherCAT bus (11).

4. The dual arc TIG welding control mainboard according to claim 1, characterized in that: The first two-axis motion chip (3) and the second two-axis motion chip (4) are both connected to the 32-bit main control chip (2) via a 16-bit parallel bus (17).

5. The dual arc TIG welding control mainboard according to claim 1, characterized in that: One side of the welding control mainboard body (1) is provided with a current and voltage sampling signal interface (18), a first power supply control signal interface (19), a second power supply control signal interface (20) and a hot wire control signal interface (21).

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