Welding gun contact tube replacing device of arc welding robot

Abstract

The utility model discloses a device for replacing a contact tube of a welding gun of an arc welding robot, and belongs to the technical field of contact tube replacement. Comprising a robot body, a robot control cabinet is connected to the left side of the robot body through a wire, a welding power source is connected to the upper portion of the robot control cabinet through a wire, an external controller is connected to the left side of the robot control cabinet through a wire, and an automatic protective sleeve replacing device is connected to the lower portion of the robot control cabinet through a wire. When the contact tube replacing device for the welding gun of the arc welding robot reaches the specified gun cleaning times and the specified welding seam length, the welding gun automatically stops welding, and meanwhile, the robot body moves the welding gun to the automatic protective sleeve and contact tube replacing device to replace the contact tube; by adopting the method, an operator does not need to manually replace the contact tube of the protective sleeve of the welding gun, and does not need to enter a safety fence to replace the protective sleeve and the contact tube.

Description

Technical Field

[0001] The utility model relates to a conductive nozzle replacement technology, in particular to a conductive nozzle replacement device for an arc welding robot welding gun. Background Art

[0002] Robotic arc welding is widely used in the welding production of automobiles, high-speed rail, motorcycles, machinery, chemicals, thermal power plants, medical equipment, furniture, household appliances, and their components. Currently, arc welding torches typically use air- or water-cooled MIG gas shielded welding torches. The main structure is shown in the figure, including the robot body, robot control cabinet, welding power supply, robotic welding gun, automatic replacement of protective sleeves and contact nozzles, gun cleaning station, welding station, fume purifier, external controller, and communication connection between the robot control cabinet and the welding power supply. The robot control cabinet controls the movements of the robot body. The robotic welding gun is located on the robot body and drives the robot welding gun's movement. The welding power supply is connected to the robot welding gun and controls the robot welding gun's welding process. The robotic welding gun is equipped with a protective sleeve and contact nozzle. During the production process, the contact nozzle generally needs to be replaced after each part is produced, typically once per shift. Currently, in most factories, operators are required to enter a safety fence or outside the fenced workstation to replace the protective sleeve and contact nozzle.

[0003] During this process, the operator moves frequently within the welding station, traveling a long route. The machinery within the safety fence can easily cause personal injury, so the operator must carefully navigate both inside and outside the safety fence. Furthermore, replacing the contact tip takes approximately 10 to 15 minutes, which is a long time. Furthermore, manual replacement of the protective sleeve and contact tip can result in poor gas shielding and deviation in the wire feed position, leading to porosity and deviation in the original welding position. This is time-consuming and poses certain safety risks, which in turn reduces production efficiency and causes batch quality issues.

[0004] Contents of this utility model

[0005] Purpose of the present invention: The purpose of the present invention is to provide a method for better protecting the personal safety of operators; another purpose of the present invention is to shorten the time it takes for operators to replace the protective cover and the conductive nozzle, thereby increasing work efficiency. Furthermore, after the protective cover and the conductive nozzle are replaced, there is no need for trajectory verification.

[0006] Technical solution: It includes a robot body, the left side wires of the robot body are connected to the robot control cabinet, the upper wires of the robot control cabinet are connected to the welding power supply, the left side wires of the robot control cabinet are connected to the external controller, and the lower wires of the robot control cabinet are connected to the automatic protective cover replacement device.

[0007] Furthermore, a conductive nozzle storage box is fixed on the left side of the robot body, a conductive nozzle seat is fixedly connected to the upper surface of the conductive nozzle storage box, and a conductive nozzle rotating motor is fixedly connected to the lower surface of the conductive nozzle storage box.

[0008] Furthermore, a protective cover storage box is fixedly connected to the right side of the robot body, a protective cover seat is fixedly connected to the upper surface of the protective cover storage box, and a protective cover rotating motor is fixedly connected to the lower surface of the protective cover storage box;

[0009] Furthermore, the upper wires of the robot control cabinet are connected to the robot welding gun, and the left wires of the robot welding gun are connected to the welding power supply.

[0010] Furthermore, the wires below the robot control cabinet are connected to a gun cleaning station.

[0011] Furthermore, the external controller includes a start button, and a stop button is fixedly connected to the lower side of the front surface of the start button.

[0012] Furthermore, an operation display screen is fixedly connected to the right side of the front surface of the external controller.

[0013] Furthermore, the lower surface of the robot body is fixedly connected to a base.

[0014] Beneficial effect: When the arc welding robot welding gun conductive nozzle replacement device reaches the specified number of gun cleaning times and welding weld length, the welding gun will automatically stop welding, and at the same time the robot body will move the welding gun to the automatic replacement of the protective cover and conductive nozzle device to replace the conductive nozzle. With this method, the operator does not need to manually replace the protective cover and conductive nozzle of the welding gun, and there is no need for the operator to enter the safety fence to replace the protective cover and conductive nozzle. After the replacement of the protective cover and conductive nozzle is completed, there is no need for trajectory verification, which greatly shortens the time for the operator to replace the protective cover and conductive nozzle and speeds up work efficiency. According to statistics, after adopting this method, the time for each replacement of the protective cover and conductive nozzle can be reduced from the original 10 to 15 minutes to 1.5 to 2 minutes, which can save a lot of time for production.

[0015] This method also makes it safer for operators to replace the welding gun's protective sleeve and conductive tip manually without having to enter the safety fence. This prevents personnel from entering dangerous areas and better protects the operator's personal safety. Furthermore, the robot automatically moves the welding gun to the automatic sleeve and conductive tip replacement device only when a control signal prompts the robot's main body to move the welding gun to the automatic sleeve and conductive tip replacement device, further ensuring safety. Furthermore, the operator does not need to move back and forth, reducing their labor intensity. The system is also inexpensive to implement, with hardware costs per system not exceeding 2,500 yuan, and labor costs around 800 yuan. However, the long-term value benefits are significant. On average, two shifts of production per day (based on two to three changes of the conductive tip and protective sleeve per shift) can increase production by 30 to 45 minutes, resulting in a short payback period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure is practical and practical;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above.

[0018] Figure 3 This is a schematic diagram of the internal control structure of the present utility model.

[0019] In the figure: 1. Robot body; 2. Robot control cabinet; 3. Welding power supply; 4. Robot welding gun; 5. Automatic protective cover replacement device; 6. Gun cleaning station; 7. Conductive nozzle storage box; 8. Conductive nozzle holder; 9. Base; 10. External controller; 11. Protective cover storage box; 12. Protective cover holder; 13. Start button; 14. Stop button; 15. Operation display screen; 16. Protective cover rotating motor; 17. Conductive nozzle rotating motor. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1-2As shown, a device for replacing a conductive tip of an arc welding robot welding gun is provided, comprising a robot body 1, wherein the left side wires of the robot body 1 are connected to a robot control cabinet 2, the upper wires of the robot control cabinet 2 are connected to a welding power source 3, the left side wires of the robot control cabinet 2 are connected to an external controller 10, the lower wires of the robot control cabinet 2 are connected to an automatic protective cover replacement device 5, a conductive tip storage box 7 is fixed to the left side of the robot body 1, the upper surface of the conductive tip storage box 7 is fixedly connected to a conductive tip seat 8, the right side of the robot body 1 is fixedly connected to a protective cover storage box 11, the upper surface of the protective cover storage box 11 is fixedly connected to a protective cover seat 12, the lower surface of the protective cover storage box 11 is fixedly connected to a protective cover rotating motor 16, the upper wires of the robot control cabinet 2 are connected to a robot welding gun 4, and the left side wires of the robot welding gun 4 are connected to the welding power source 3;

[0023] When the above device is working, the control system of the robot control cabinet 2 first detects the number of times the protective cover and the conductive nozzle on the robot welding gun 4 are cleaned, and the pre-taught program is compiled. If the number of times the protective cover and the conductive nozzle are cleaned and the weld length meet the specified requirements, the control system of the robot control cabinet 2 controls the welding gun to stop welding, and the control signal reminds the robot's walking path which has been programmed in advance. The robot body 1 drives the robot welding gun 4 to move to the gun cleaning station 6 for automatic wire cutting and then moves to the automatic replacement of the protective cover and the conductive nozzle device, and automatically realizes the first removal of the protective cover, then the conductive nozzle, the replacement of the new conductive nozzle, the replacement of the new protective cover, and the automatic replacement of the protective cover position of the protective cover device 5. The shaft and gear transmission arranged in the disassembly device can make it rise, fall and rotate left and right. There is a hole on it, the contour of which is consistent with the contour of the protective cover as a whole, for embedding the protective cover therein, so as to facilitate the removal and installation of the protective cover.

[0024] The conductive nozzle seat 8 is placed in the disassembly device and has a shaft and gear transmission that can make it rise, fall and rotate left and right. There is a hole on it, the contour of which is consistent with the overall contour of the lower end of the installation position of the conductive nozzle, which is used to embed the conductive nozzle into it, making it easy to disassemble and install the conductive nozzle. When the conductive nozzle and protective cover of the welding gun cannot be used and need to be replaced, the robot body cuts the wire first under the control of the program, then moves and aligns with the center of the welding gun protective cover to extend into the preset position of the protective cover seat of the automatic replacement protective cover device 5. The protective cover steering servo motor shaft transmission gear drives the overall contour fixture of the protective cover to rotate a certain angle to align with the welding gun protective cover and rotate left to remove the protective cover. After the protective cover is removed, the robot body leaves the disassembly and assembly device under the control of the program, and the protective cover replacement device rises to the position where the welding gun has just been disassembled and stopped, ejects the old protective cover, stops and starts to descend, and descends to the position of the protective cover magazine. The protective cover magazine ejects a protective cover through the clip device into the overall contour fixture of the protective cover to prepare for replacing the protective cover below;

[0025] When the robot body 1 drives the welding gun to move to the disassembly and assembly position of the automatic protective cover replacement device 5, the conductive cover steering servo motor shaft transmission gear drives the overall contour fixture of the conductive cover to rotate a certain angle to align with the welding gun conductive cover and rotate it to the left to remove the conductive cover. At this time, the conductive cover replacement steering servo motor shaft transmission gear drives the overall contour fixture of the conductive cover to start descending to the conductive cover storage box 7 position and stop waiting. The conductive cover storage box 7 pops out a new conductive cover through the clip device to squeeze out the old conductive cover and reach the overall contour fixture. The conductive cover steering servo motor bearing transmission gear drives the overall contour fixture of the conductive cover to start rising and turn right to install the conductive cover on the welding gun. After the conductive cover is installed, the robot body 1 drives the welding gun to leave the disassembly and assembly device under the control of the program and come to the protective cover replacement device 5. The protective cover steering servo motor shaft transmission gear drives the overall contour fixture of the protective cover to rotate a certain angle and rise to align with the welding gun protective cover and rotate it to the right to install the protective cover.

[0026] like Figure 1 As shown, the external controller 10 includes a start button 13, a stop button 14 is fixedly connected to the lower front surface of the start button 13, and an operation display screen 15 is fixedly connected to the right side of the front surface of the external controller 10;

[0027] The start button 13 and the stop button 14 can be externally connected. When connected, the robot can be controlled by the start button 13 and the stop button 14, and parameters can be set through the set display screen 15.

[0028] The lower surface of the robot body 1 is fixedly connected to a base 9;

[0029] The base 9 can make the robot body more stable when placed horizontally and will not fall over during operation.

[0030] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A device for replacing a conductive tip of an arc welding robot welding gun, comprising a robot body (1), characterized in that: The left side wires of the robot body (1) are connected to a robot control cabinet (2), the upper wires of the robot control cabinet (2) are connected to a welding power source (3), the left side wires of the robot control cabinet (2) are connected to an external controller (10), and the lower wires of the robot control cabinet (2) are connected to an automatic protective cover replacement device (5).

2. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: A conductive nozzle storage box (7) is fixed on the left side of the robot body (1), a conductive nozzle seat (8) is fixedly connected to the upper surface of the conductive nozzle storage box (7), and a conductive nozzle rotating motor (17) is fixedly connected to the lower surface of the conductive nozzle storage box (7).

3. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: The right side of the robot body (1) is fixedly connected to a protective cover storage box (11), the upper surface of the protective cover storage box (11) is fixedly connected to a protective cover seat (12), and the lower surface of the protective cover storage box (11) is fixedly connected to a protective cover rotating motor (16).

4. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: The upper wire of the robot control cabinet (2) is connected to the robot welding gun (4), and the left wire of the robot welding gun (4) is connected to the welding power source (3).

5. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: The lower electric wires of the robot control cabinet (2) are connected to a gun cleaning station (6).

6. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: The external controller (10) includes a start button (13), and a stop button (14) is fixedly connected to the lower portion of the front surface of the start button (13).

7. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: An operation display screen (15) is fixedly connected to the right side of the front surface of the external controller (10).

8. The arc welding robot welding gun contact tip replacement device according to claim 1, characterized in that: The lower surface of the robot body (1) is fixedly connected to a base (9).

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