Equipment for automatically replacing contact tube based on robot welding gun

Abstract

Equipment for automatically replacing a contact tube based on a robot welding gun comprises a shielding gas nozzle dismounting and mounting device, a contact tube dismounting and mounting device, a contact tube tightening device and a contact tube conveying device, and the equipment is driven by a pneumatic mechanism; each of the shielding gas nozzle dismounting device, the contact tube dismounting device and the contact tube tightening device comprises a spring structure; the contact tube conveying device comprises a contact tube box. Compared with a traditional motor driving mode, a pneumatic driving mode is combined with a spring structure design, so that the disassembly and assembly process and debugging are more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing or welding, and relates to a device based on an automatic electrode switching device for a robotic welding torch. Background Technology

[0002] In the fields of additive manufacturing or welding, the welding torch is the implementing component. The main components of the welding torch assembly, the contact tip and the nozzle, are consumable parts. The contact tip and nozzle are threadedly connected to the end of the welding torch. Generally, after 3-4 hours of continuous operation, the contact tip will show varying degrees of wear and tear. Therefore, to ensure product quality, manual replacement of the contact tip is necessary. However, the traditional method of manually replacing the welding torch contact tip has many problems.

[0003] First, the manual replacement speed cannot match the production cycle, resulting in the equipment not being utilized optimally. For example, during production line replacement, the entire line stops, severely impacting the production cycle. Second, workers need to frequently enter the work area for replacement, greatly increasing safety risks and threatening human life. Finally, in some special environments, workers cannot enter the work area, such as inside an inert gas argon chamber, where personnel cannot enter. In such cases, automated replacement of the contact nozzle becomes the only solution.

[0004] Existing technologies commonly use motor-driven methods to disassemble and assemble nozzles or conductive tips. The disadvantage of motor-driven methods is that the number of rotations during the nozzle or conductive tip disassembly and assembly process needs to be clearly defined in order to accurately disassemble or install it. At the same time, it also requires the welding torch head to be raised or lowered in coordination with the rotation process, making the entire disassembly, assembly, or debugging process quite cumbersome.

[0005] To solve the above-mentioned technical problems, this utility model provides a set of equipment for automatically changing the conductive tip of an industrial robot welding torch. It adopts a simple pneumatic drive method combined with a spring structure design, which eliminates the need for a specific number of rotations required by the motor drive method, and also eliminates the need to raise or lower the welding torch head. This improves the flexibility of the cooperation of various mechanical structures during disassembly and assembly, making the disassembly, assembly or debugging process simpler and more convenient. Utility Model Content

[0006] The main technical problem this invention addresses is providing an automated device for replacing the conductive tip of an industrial robot welding torch. This invention utilizes a purely pneumatic drive system, reducing the complexity of traditional motor-driven systems. The simple pneumatic drive, combined with different structural designs, enables precise disassembly and installation of the nozzle and conductive tip. This invention can improve the replacement speed of existing conductive tips, reduce the probability of accidents, save labor costs, and increase production efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A device for automatically changing contact nozzles based on a robotic welding torch includes: a device for disassembling and assembling protective gas nozzles; a device for disassembling contact nozzles; a device for tightening contact nozzles; a device for conveying contact nozzles; a device for collecting contact nozzles; a pneumatic sliding door device; a device for detecting the installation of contact nozzles; and a waste contact nozzle collection box.

[0008] The protective gas nozzle disassembly and assembly device can disassemble and install the protective gas nozzle of the welding torch. The conductive nozzle disassembly device can disassemble the old conductive nozzle, and the disassembled old conductive nozzle falls into the waste conductive nozzle collection box.

[0009] The conductive tip tightening device can drive the conductive tip conveying device to tighten new conductive tips; the conductive tip conveying device can transport new conductive tips from the conductive tip collecting device to the installation position; the conductive tip collecting device includes a conductive tip box; a quick positioning device; and a conductive tip pushing device; the conductive tip box contains conductive tips and is pressed by a rear spring. After the conductive tip box is full, it is inserted into the conductive tip collecting device. The quick positioning device performs quick positioning, and the conductive tip pushing device pushes the first conductive tip to the installation port. The conductive tip falls to the conductive tip conveying device due to gravity, and so on.

[0010] The pneumatic sliding door device automatically opens the sliding door during the conductive nozzle replacement procedure and automatically closes the sliding door after the procedure ends. The conductive nozzle installation detection device uses a through-beam sensor to detect whether the conductive nozzle has been successfully installed; the waste conductive nozzle collection box collects waste conductive nozzles.

[0011] An automatic contact tip changing device based on a robotic welding torch is disclosed. The device includes a protective gas nozzle assembly / disassembly device, a contact tip disassembly device, a contact tip tightening device, and a contact tip feeding device. The device is driven by a pneumatic mechanism. Each of the protective gas nozzle assembly / disassembly device, contact tip disassembly device, and contact tip tightening device includes a spring structure. The contact tip feeding device includes a contact tip holder. The protective gas nozzle assembly / disassembly device includes a first pneumatic motor; the contact tip disassembly device includes a second pneumatic motor; and the contact tip tightening device includes a third pneumatic motor. The protective gas nozzle assembly / disassembly device includes a wedge-shaped lifting spring and a protective gas nozzle buffer spring; the contact tip disassembly device includes a contact tip buffer spring; and the contact tip tightening device includes a lifting spring. The pneumatic mechanism and spring structure work together to improve the flexible fit between the device and the welding torch head, avoiding the need to raise or lower the welding torch head and eliminating the need to specify the number of rotations during assembly / disassembly as required by traditional motor-driven methods, thus making the assembly / disassembly and debugging processes more convenient.

[0012] The protective gas nozzle assembly / disassembly device includes a wedge, a wedge guide, a wedge outer guide fixing block, a nozzle vertical movement limiting component, a first bearing, a first pneumatic motor, a wedge lifting spring, a protective gas nozzle buffer spring, and a protective gas nozzle. The wedge and the wedge guide are engaged by an insertion fit; the wedge and the wedge outer guide fixing block are engaged by an inclined surface fit; the wedge outer guide fixing block and the nozzle vertical movement limiting component are engaged by a shaft hole fit; the bottom of the wedge outer guide fixing block is engaged with the protective gas nozzle buffer spring; the bottom of the wedge guide is engaged with the wedge lifting spring; and the nozzle vertical movement limiting component is connected to the first pneumatic motor via a coupling.

[0013] The device for removing the conductive nozzle includes a conductive nozzle clamping block, a conductive nozzle top cover, a conductive nozzle guide fixing component, a conductive nozzle central shaft, a conductive nozzle drive shaft, a second bearing, a large gear, a second pneumatic motor, a small gear, a conductive nozzle buffer spring, and an old conductive nozzle. The conductive nozzle clamping block is installed on the conductive nozzle top cover with screws. The conductive nozzle top cover and the conductive nozzle guide fixing component are flexibly connected by positioning beads and O-rings. The conductive nozzle top cover is connected to the conductive nozzle central shaft, which is connected to the disassembly drive shaft through a shaft hole. A positioning pin is installed on the conductive nozzle central shaft and connects to the waist-shaped groove of the disassembly drive shaft to achieve vertical movement limit. The disassembly drive shaft is connected to the bottom large gear, which meshes with the small gear. The small gear is connected to the second pneumatic motor.

[0014] The conductive nozzle tightening device includes a tightening shaft, a third bearing, a drive shaft, a third pneumatic motor, and a lifting spring. The tightening shaft and the lifting spring are mounted via shaft holes. The tightening shaft is connected to the drive shaft via shaft holes, and the drive shaft is connected to the third pneumatic motor via a coupling. After the conductive nozzle is tightened, the lifting spring continuously pushes the tightening shaft upward to keep it engaged with the conductive nozzle feeding device.

[0015] The conductive nozzle feeding device includes a conductive nozzle placement shaft, a meshing lifting spring, a connecting plate, and a rotary lifting cylinder. The rotary lifting cylinder is connected to the connecting plate by screws. The conductive nozzle placement shaft and the meshing lifting spring are engaged through a shaft hole. An oil-free bushing is provided in the middle of the connecting plate to guide and lubricate the conductive nozzle placement shaft as it slides up and down.

[0016] The conductive nozzle collecting device includes a mechanical quick-lock device, a conductive nozzle box support plate, a conductive nozzle pushing device, and a new conductive nozzle; a conductive nozzle box can be inserted into the conductive nozzle box support plate, and the mechanical quick-lock device releases the pin and inserts it into the conductive nozzle box to achieve quick positioning and locking. The conductive nozzle pushing device (38) is installed on the conductive nozzle box support plate by threads.

[0017] The mechanical quick-lock device includes a release knob, a center sleeve, a spring cavity, a return spring, and a positioning pin. The release knob is connected to the positioning pin by a screw, and the positioning pin and the spring cavity are fitted with a shaft hole. The return spring and the positioning pin are fitted with a shaft hole. The center sleeve is installed on the head of the spring cavity to ensure that it remains coaxial with the spring cavity when the release knob is released.

[0018] The equipment also includes a pneumatic sliding door device, a conductive nozzle installation detection device, and a waste conductive nozzle collection box.

[0019] Beneficial effects:

[0020] This invention provides a set of equipment for automatically changing the conductive tip of an industrial robot welding torch. Compared with traditional conductive tip changing systems, it has the following characteristics:

[0021] (1) The protective gas nozzle disassembly and assembly device can realize the elastic force generated by the compression of the wedge block lifting spring and the protective gas nozzle buffer spring when the welding torch is disassembled and assembled, as well as the pin groove matching guide. This allows the welding torch to be disassembled and assembled without raising and lowering the torch head as the threads are unscrewed and tightened, which greatly simplifies the debugging procedure and reduces the difficulty of debugging. The protective gas nozzle disassembly and assembly device is driven by a pneumatic motor, which greatly reduces the difficulty of electrical control.

[0022] (2) The disassembly device for the conductive nozzle can achieve the disassembly and assembly of the welding torch by means of the action of the conductive nozzle buffer spring, so that the torch head does not need to be raised or lowered as the threads are unscrewed and tightened, which greatly simplifies the debugging procedure and reduces the difficulty of debugging; the disassembly device for the conductive nozzle is driven by a pneumatic motor, which greatly reduces the difficulty of electrical control, and only the on and off of the solenoid valve needs to be controlled.

[0023] (3) The conductive tip tightening device has a bottom spring that continuously provides an upward thrust to keep it engaged with the conductive tip placement shaft of the conductive tip feeding device. This allows the welding torch to be fitted with a new conductive tip without raising or lowering the torch head as the threads are loosened or tightened, greatly simplifying the debugging process and reducing the difficulty of debugging. The conductive tip tightening device is driven by a pneumatic motor, which greatly reduces the difficulty of electrical control. Only the on / off state of the solenoid valve needs to be controlled.

[0024] (4) The conductive nozzle feeding device adopts a rotary lifting cylinder, which can lower the material receiving position of the conductive nozzle, thereby ensuring that the conductive nozzle collecting device sinks as a whole; the conductive nozzle feeding device adopts cylinder control, which greatly reduces the difficulty of electrical control, and only the on and off of the solenoid valve needs to be controlled.

[0025] (5) The conductive nozzle collection device adopts the form of a conductive nozzle box, which can fill multiple conductive nozzles at one time. After the conductive nozzles are used up, a new conductive nozzle box can be replaced to quickly fill the new conductive nozzles, ensuring that there are always new conductive nozzles available when the equipment is in long-term operation. When replacing the conductive nozzle box, the conductive nozzle collection device adopts a mechanical quick-locking device, which can quickly lock the conductive nozzle with just one insertion. The conductive nozzle collection device uses a conductive nozzle pushing device to push the new conductive nozzle to the feeding port. The conductive nozzle falls into the conductive nozzle conveying device by gravity. It adopts pneumatic control, which greatly reduces the difficulty of electrical control. Only the on and off of the solenoid valve needs to be controlled.

[0026] (6) Pneumatic sliding door device, which uses a cylinder to control the door to open or close automatically, can play a dust prevention role. Secondly, the use of pneumatic control greatly reduces the difficulty of electrical control, and only the on and off of the solenoid valve needs to be controlled.

[0027] (7) The whole equipment adopts a pure pneumatic control method, which greatly simplifies the electrical control logic, and ensures that the equipment is very easy to debug, the equipment failure rate is extremely low, and maintenance is very convenient and quick. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a front view of the protective gas nozzle disassembly and assembly device of this utility model.

[0030] Figure 3 This is a front view of the device for disassembling the conductive nozzle of this utility model.

[0031] Figure 4 This is a front view of the conductive nozzle tightening device of this utility model.

[0032] Figure 5 This is a schematic diagram of the conductive nozzle feeding device of this utility model.

[0033] Figure 6 This is a front view of the conductive nozzle collecting device of this utility model.

[0034] Figure 7 This utility model Figure 6 DD cross-sectional view.

[0035] In the diagram: 1. Conductive nozzle tightening device; 2. Conductive nozzle feeding device; 3. Conductive nozzle collecting device; 4. Conductive nozzle disassembly device; 5. Pneumatic sliding door device; 6. Protective gas nozzle disassembly and assembly device; 47. Conductive nozzle installation detection device; 48. Waste conductive nozzle collection box; 7. Wedge block; 8. Wedge block guide; 9. Wedge block outer guide fixing block; 10. Nozzle up and down movement limit component; 11. First bearing; 12. First pneumatic motor; 13. Wedge block lifting spring; 14. Protective gas nozzle buffer spring; 15. Protective gas nozzle; 16. Conductive nozzle clamping block; 17. Conductive nozzle top cover; 18. Conductive nozzle guide fixing component; 19. Conductive nozzle central shaft; 20. Conductive nozzle drive shaft; 21. Second bearing; 22. Large gear; 23. Second pneumatic motor; 24. Small gear; 25. Conductive nozzle buffer spring; 26. Old conductive nozzle; 27. Tightening shaft; 28. Third bearing; 29. ​​Drive shaft; 30. Third pneumatic motor; 31. Lifting spring; 32. Conductive nozzle placement shaft; 33. Engaging lifting spring; 34. Connecting plate; 35. Rotary lifting cylinder; 36. Mechanical quick-lock device; 37. Conductive nozzle housing support plate; 38. Conductive nozzle pushing device; 39. Proximity switch; 40. New conductive nozzle; 41. Tightening spring; 42. Disengagement knob; 43. Center sleeve; 44. Spring cavity; 45. Return spring; 46. Positioning pin. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-7 The present invention will be further described below.

[0037] An automatic contact tip replacement device based on a robotic welding torch includes: a protective gas nozzle disassembly and assembly device 6; a contact tip disassembly device 4; a contact tip tightening device 1; a contact tip material conveying device 2; a contact tip material collection device 3; a pneumatic sliding door device 5; a contact tip installation detection device 47; and a waste contact tip collection box 48.

[0038] The protective gas nozzle disassembly and assembly device 6 enables the disassembly and installation of the welding torch protective gas nozzle 15. The conductive nozzle disassembly device 4 disassembles the old conductive nozzle 26 and drops it into the waste conductive nozzle collection box 48. The conductive nozzle tightening device 1 drives the conductive nozzle conveying device 2 to tighten the new conductive nozzle 40. The conductive nozzle conveying device 2 transports the new conductive nozzle 40 from the conductive nozzle collection device 3 to the installation position. The conductive nozzle collection device 3 includes a conductive nozzle box, a mechanical quick-lock device 36, and a conductive nozzle pushing device 38. The conductive nozzle box contains conductive nozzles and is pressed by a rear spring. When the conductive nozzle box is full, it is inserted into the conductive nozzle collection device 3. The mechanical quick-lock device 36 performs rapid positioning, and the conductive nozzle pushing device 38 pushes the first conductive nozzle to the installation port. The conductive nozzle falls into the conductive nozzle conveying device 2 due to gravity, and so on. The pneumatic sliding door device 5 automatically opens the sliding door when the conductive nozzle replacement program is running and automatically closes the sliding door after the program ends. The conductive nozzle installation detection device 47 can detect whether the conductive nozzle has been successfully installed using a through-beam light sensor; the waste conductive nozzle collection box 48 can collect waste conductive nozzles.

[0039] like Figure 2 This utility model relates to a structural diagram of a protective gas nozzle disassembly and assembly device 6 for an automatic contactless welding torch based on a robotic welding torch. The protective gas nozzle disassembly and assembly device 6 includes: a wedge 7; a wedge guide 8; a wedge outer guide fixing block 9; a nozzle vertical movement limiting component 10; a first bearing 11; a first pneumatic motor 12; a wedge lifting spring 13; a protective gas nozzle buffer spring 14; and a protective gas nozzle 15. The wedge 7 and the wedge guide 8 are inserted together, allowing for radial sliding. The wedge 7 and the wedge outer guide fixing block 9 are fitted together by an inclined plane and move vertically, achieving the functions of tightening and loosening. The wedge outer guide fixing block 9 and the nozzle vertical movement limiting component 10 are fitted together by a shaft hole. A sliding pin is installed on the shaft of the wedge outer guide fixing block 9, which slides vertically within the slot of the nozzle vertical movement limiting component 10, achieving the function of vertical limiting. The bottom of the wedge outer guide fixing block 9 engages with the protective gas nozzle buffer spring 14, compensating for the height difference between thread disengagement and tightening when disassembling the protective gas nozzle 15. The bottom of the wedge guide 8 cooperates with the wedge lifting spring 13 to ensure that the wedge 7 is reset and opened after the protective gas nozzle is removed from the welding torch, facilitating the next disassembly and assembly process. The nozzle up-and-down movement limiter 10 is connected to the first pneumatic motor 12 via a coupling, driving it to rotate in both directions to achieve the disassembly and assembly of the protective gas nozzle.

[0040] like Figure 3This utility model relates to a schematic diagram of a conductive tip removal device 4 for an automatic conductive tip replacement device based on a robotic welding torch. The conductive tip removal device 4 includes: a conductive tip clamping block 16; a conductive tip top cover 17; a conductive tip guide fixing component 18; a conductive tip central shaft 19; a conductive tip drive shaft 20; a second bearing 21; a large gear 22; a second pneumatic motor 23; a small gear 24; a conductive tip buffer spring 25; and an old conductive tip 26. The disassembly device 4 includes four conductive nozzle clamping blocks 16, which are screwed onto the conductive nozzle cover 17. The conductive nozzle cover 17 and the conductive nozzle guide fixing member 18 are flexibly connected by positioning beads and O-rings. The conductive nozzle cover 17 is connected to the conductive nozzle central shaft 19, which is connected to the disassembly drive shaft 20 via a shaft hole. A positioning pin is installed on the central shaft 19 and connected to the waist-shaped groove of the disassembly drive shaft 20 to limit its vertical movement. The disassembly drive shaft 20 is connected to the bottom large gear 22, which meshes with the small gear 24. The small gear 24 is connected to the second pneumatic motor 23. Two pneumatic motors 23 drive a small gear 24 to rotate, which in turn drives a large gear 22 to rotate. The large gear 22 then drives a drive shaft 20 for disassembling the conductive nozzle to rotate. This drive shaft 20, via a pin, drives the central shaft 19 of the conductive nozzle to rotate. The central shaft 19 then drives the upper cover 17 of the conductive nozzle to rotate. Due to the friction of the sealing ring and the tightening force of the positioning ball, the upper cover 17 and the conductive nozzle fixing component cause the conductive nozzle clamping block 16 to rotate inward and tighten, ultimately clamping the conductive nozzle and disengaging it from the threads of the welding torch. During this disengagement process, the upper cover 17, along with the central shaft 19, presses down on the conductive nozzle buffer spring 25, ensuring that the torch head does not need to be raised during the disengagement process. After disassembly, the pneumatic motors rotate in the opposite direction, causing the conductive nozzle clamping block 16 to open outward. The conductive nozzle will then fall into the waste conductive nozzle collection box 48 due to gravity.

[0041] like Figure 4 The schematic diagram of the contact tip tightening device 1 of this utility model, applied to an automatic contact tip changing device for a robotic welding torch, includes: a tightening shaft 27; a third bearing 28; a drive shaft 29; a third pneumatic motor 30; and a lifting spring 31. The tightening shaft 27 and the lifting spring 31 are mounted via shaft holes. The tightening shaft 27 and the drive shaft 29 are connected via shaft holes. A positioning pin is installed on the tightening shaft 27, and the drive shaft 29 has a slotted groove in which the positioning pin slides up and down to achieve upper and lower limits. The drive shaft 29 and the third pneumatic motor 30 are connected via a coupling. After the contact tip is tightened, the lifting spring 31 continuously pushes the tightening shaft 27 upward, keeping it engaged with the contact tip feeding device 2. This eliminates the need to raise the welding torch head as it is screwed in, reducing adjustment difficulty.

[0042] like Figure 5This utility model relates to a conductive tip feeding device 2 of an automatic conductive tip changing device based on a robotic welding torch. The device includes: a conductive tip placement shaft 32; a meshing lifting spring 33; a connecting plate 34; and a rotary lifting cylinder 35. The rotary lifting cylinder 35 is connected to the connecting plate 34 by screws. The conductive tip placement shaft 32 and the meshing lifting spring 33 are fitted through a shaft hole. An oil-free bushing is provided in the middle of the connecting plate 34 to guide and lubricate the conductive tip placement shaft 32 as it slides up and down. The meshing lifting spring 33 ensures that the conductive tip placement shaft 32 automatically springs back to its original position after the welding torch presses down on it. The rotary lifting cylinder 35 operates as follows: rotating 45° triggers a magnetic switch, closing the electromagnetic control valve; descending to the bottom triggers the magnetic switch again; then the electromagnetic valve reopens; and rotating another 45° triggers the magnetic switch again, indicating that the receiving device has reached the receiving position. After receiving the material, the solenoid valve of the rotary lifting cylinder 35 is activated, causing the rotary lifting cylinder 35 to rotate 45° and trigger the magnetic switch. The solenoid control valve of the rotary lifting cylinder 35 is closed, and the rotary lifting cylinder 35 moves up to the top and triggers the magnetic switch. Then the solenoid valve of the rotary lifting cylinder 35 is reopened, and it rotates 45° again to trigger the magnetic switch, indicating that the receiving device has reached the installation position.

[0043] like Figure 6 and 7This utility model relates to a conductive tip collection device 3 in an automatic conductive tip changing device based on a robotic welding torch. The structural diagram includes: a mechanical quick-lock device 36; a conductive tip holder plate 37; a conductive tip pushing device 38; a proximity switch 39; a new conductive tip 40; a clamping spring 41; a release knob 42; a center sleeve 43; a spring cavity 44; a return spring 45; and a positioning pin 46. Multiple conductive tips are installed in the conductive tip holder. The clamping spring 41 is compressed to insert the conductive tip holder into the conductive tip holder plate 37. The mechanical quick-lock device 36 releases its pin into the conductive tip holder, achieving rapid positioning and locking. The conductive tip pushing device 38 is threaded onto the conductive tip holder plate 37, pushing one conductive tip at a time to the feeding port. The conductive tip falls into the conductive tip conveying device 2 by gravity. The mechanical quick-lock device 36 includes: a release knob 42; a center sleeve 43; a spring cavity 44; a return spring 45; and a positioning pin 46. The release knob 42 is connected to the positioning pin 46 via screws. The positioning pin 46 and the spring cavity 44 are fitted with a shaft hole, and the return spring 45 is fitted with the positioning pin 46 via a shaft hole. The center sleeve 43 is installed on the head of the spring cavity 44 to ensure that the release knob 42 remains coaxial with the spring cavity 44 when it is released. The usage steps are as follows: Pull the release knob 42 by hand and rotate it 45 degrees. At this time, the release knob 42 will engage with the top of the spring cavity 44, and the positioning pin 46 will be in the retracted state. After inserting the conductive nozzle box, rub the release knob 42 by hand. The positioning pin 46 will be pushed into the conical hole of the conductive nozzle box by the return spring 45, thereby achieving quick positioning and locking of the conductive nozzle box.

[0044] The working process of this utility model is as follows: The pneumatic sliding door device 5 receives a signal from the solenoid valve and drives the cylinder to open the sliding door; at this time, the procedure of removing the protective gas nozzle 15 from the welding torch is executed: the welding torch is inserted into the protective gas nozzle removal and installation device 6. The protective gas nozzle removal and installation device 6 adopts a wedge block 7 retraction structure. As the welding torch is continuously inserted, it drives the wedge block 7 to retract inward until it clamps the protective gas nozzle. At this time, the first pneumatic motor 12 drives the wedge block 7 mechanism to rotate, thereby realizing the function of removing the protective gas nozzle. During the removal process, the protective gas nozzle 15 will continuously press down the wedge block lifting spring 13 and the protective gas nozzle buffer spring 14 due to the threads coming loose, so that the welding torch does not need to be raised.

[0045] After the protective gas nozzle 15 is disassembled, the welding torch is moved to the conductive nozzle installation and detection device 47 to check for any discarded conductive nozzles. If a discarded conductive nozzle is detected, the next step of disassembling the discarded conductive nozzle is performed. Disassembly procedure: The welding torch is inserted into the conductive nozzle disassembly device 4, which includes four conductive nozzle clamping blocks 16. The four conductive nozzle clamping blocks are installed on the conductive nozzle cover 17. The conductive nozzle cover 17 and the conductive nozzle guide fixing member 18 are flexibly connected by positioning beads and O-rings. The conductive nozzle cover 17 is connected to the conductive nozzle central shaft 19. The conductive nozzle central shaft 19 is connected to the disassembly drive shaft 20 through a pin groove. The disassembly drive shaft 20 is connected to the bottom large gear. Next, the large gear meshes with the small gear, which is connected to the second pneumatic motor 23. The second pneumatic motor 23 drives the small gear to rotate, which in turn drives the large gear to rotate. The large gear drives the conductive nozzle drive shaft 20 to rotate, which in turn drives the conductive nozzle central shaft 19 to rotate via a pin. The conductive nozzle central shaft 19 drives the conductive nozzle upper cover 17 to rotate. Due to the friction of the sealing ring and the tightening force of the positioning bead, the conductive nozzle upper cover 17 and the conductive nozzle fixing component cause the conductive nozzle clamping block 16 to rotate inward and tighten, ultimately clamping the conductive nozzle and disengaging it from the threads of the welding torch. During the disengagement process, the conductive nozzle upper cover 17, along with the conductive nozzle central shaft 19, compresses the spring downward, ensuring that the torch head does not need to be raised during the disengagement process. After disassembly, the second pneumatic motor 23 rotates in the opposite direction, causing the conductive nozzle clamping block 16 to open outward. The conductive nozzle will then fall into the waste conductive nozzle collection box 48 due to gravity. The welding torch is raised to the contact tip installation detection device 47 to check whether the old contact tip has fallen off. If the detection is successful, proceed to the next procedure.

[0046] The procedure for installing a new conductive tip 40 is as follows: A diffuse reflection sensor on the side of the conductive tip feeding device 2 detects whether a new conductive tip 40 is present on the feeding device. Upon successful detection, the welding torch presses down on the new conductive tip 40, which in turn presses down on the conductive tip placement shaft 32. The conductive tip placement shaft 32 has an internal conical structure, ensuring that the new conductive tip 40 and the conductive tip placement shaft 32 remain coaxial. The conductive tip placement shaft 32 is then pressed down onto the new conductive tip 40 tightening device. The two are engaged by a helical inclined surface, ensuring engagement at any angle. The tightening shaft of the new conductive tip tightening device 1 has a compression spring at its bottom. The welding torch presses the tightening shaft down to its lowest point. The new conductive tip 40 tightening shaft is connected to the conductive tip drive shaft 20 via a pin groove. The conductive tip drive shaft 20 is connected to a pneumatic motor, which drives the conductive tip drive shaft 20 to rotate. The conductive tip drive shaft 20 drives the conductive tip tightening shaft 27 to rotate, which in turn drives the conductive tip placement shaft 32 of the conductive tip feeding device 2 to rotate, thereby tightening the conductive tip onto the welding torch. During the tightening process, the conductive tip tightening shaft 27 of the conductive tip tightening device 1 is continuously provided with an upward thrust by a bottom spring, keeping it continuously engaged with the conductive tip placement shaft 32 of the conductive tip feeding device 2, thus keeping the welding torch stationary. After tightening, the welding torch is moved to the conductive tip installation detection device 47 to detect that the new conductive tip is in place before proceeding to the next procedure.

[0047] Shielding gas nozzle tightening procedure: The welding torch is reinserted into the shielding gas nozzle removal and installation device 6 to perform the same action as removing the shielding gas nozzle, which will not be described here. After tightening, the welding torch is moved to the conductive nozzle installation detection device 47 to check whether the shielding gas nozzle is installed properly before proceeding to the next procedure segment.

[0048] New conductive tip feeding procedure: The conductive tip feeding device 2 is driven by a rotary lifting cylinder 35. The rotary lifting cylinder 35 rotates 45° to trigger a magnetic switch, the electromagnetic control valve of the rotary lifting cylinder 35 closes, the rotary lifting cylinder 35 descends to the bottom to trigger a magnetic switch, then the electromagnetic valve of the rotary lifting cylinder 35 reopens, and then rotates 45° again to trigger a magnetic switch, indicating that the receiving device has reached the receiving position. At this time, the conductive tip pushing device 38 of the conductive tip collecting device 3 pushes the new conductive tip to the feeding port. The conductive tip falls into the conductive tip feeding device 2 due to gravity. At this time, the electromagnetic valve of the rotary lifting cylinder 35 is activated, causing the rotary cylinder to rotate 45° to trigger a magnetic switch, the electromagnetic control valve of the rotary lifting cylinder 35 closes, the rotary lifting cylinder 35 rises to the top to trigger a magnetic switch, then the electromagnetic valve of the rotary lifting cylinder 35 reopens, and then rotates 45° again to trigger a magnetic switch, indicating that the receiving device has reached the installation position. At this point, the pneumatic sliding door device 5 receives a signal from the solenoid valve and drives the cylinder to close the sliding door; the process ends here, and the remaining step is to repeat the process to replace the conductive nozzle.

[0049] Regarding the limitation on the scope of protection of this utility model, those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of this utility model are still within the scope of protection of this utility model.

Claims

1. A device for automatically switching welding nozzles based on a robotic welding torch, characterized in that: The equipment includes a protective gas nozzle disassembly and assembly device (6), a conductive nozzle disassembly and assembly device (4), a conductive nozzle tightening device (1), a conductive nozzle feeding device (2), and a conductive nozzle collecting device (3); the protective gas nozzle disassembly and assembly device (6), the conductive nozzle disassembly and assembly device (4), the conductive nozzle tightening device (1), and the conductive nozzle feeding device (2) are driven by a pneumatic mechanism; the protective gas nozzle disassembly and assembly device (6), the conductive nozzle disassembly and assembly device (4), and the conductive nozzle tightening device (1) all include a spring structure; the conductive nozzle feeding device (2) includes a conductive nozzle box; the conductive nozzle collecting device (3) includes a mechanical quick-lock device (36), a conductive nozzle box support plate (37), a conductive nozzle pushing device (38), and a new conductive nozzle (40); a conductive nozzle box can be inserted into the conductive nozzle box support plate (37), the mechanical quick-lock device (36) releases the pin and inserts it into the conductive nozzle box to achieve quick positioning and locking, and the conductive nozzle pushing device (38) is installed on the conductive nozzle box support plate (37) by threads; The conductive nozzle tightening device (1) is located on one side of the conductive nozzle disassembly device (4), the disassembly and assembly protective gas nozzle device (6) is located on the other side of the conductive nozzle disassembly device (4), the conductive nozzle feeding device (2) is located on the side opposite to the conductive nozzle disassembly device (4) of the conductive nozzle tightening device (1), and the conductive nozzle collecting device (3) is located on the side opposite to the conductive nozzle tightening device (1) of the conductive nozzle feeding device (2).

2. The device for automatically switching welding nozzles based on a robotic welding torch according to claim 1, characterized in that: The protective gas nozzle assembly and disassembly device includes a wedge (7), a wedge guide (8), a wedge outer guide fixing block (9), a nozzle up-and-down movement limiting component (10), a first bearing (11), a first pneumatic motor (12), a wedge lifting spring (13), a protective gas nozzle buffer spring (14), and a protective gas nozzle (15). The wedge (7) and the wedge guide (8) are fitted together by insertion. The wedge (7) and the wedge outer guide fixing block (9) are fitted together by inclined plane. The wedge outer guide fixing block (9) and the nozzle up-and-down movement limiting component (10) are fitted together by shaft hole. The bottom of the wedge outer guide fixing block (9) is fitted together with the protective gas nozzle buffer spring (14). The bottom of the wedge guide (8) is fitted together with the wedge lifting spring (13). The nozzle up-and-down movement limiting component (10) is connected to the first pneumatic motor (12) by a coupling.

3. The device for automatically switching contact nozzles based on a robotic welding torch according to claim 1, characterized in that: The device for removing the conductive nozzle (4) includes a conductive nozzle clamping block (16), a conductive nozzle top cover (17), a conductive nozzle guide fixing component (18), a conductive nozzle central shaft (19), a conductive nozzle drive shaft (20), a second bearing (21), a large gear (22), a second pneumatic motor (23), a small gear (24), a conductive nozzle buffer spring (25), and an old conductive nozzle (26); the conductive nozzle clamping block (16) is mounted on the conductive nozzle top cover (17) by screws, and the conductive nozzle top cover (17) and the conductive nozzle guide fixing component (18) are connected to each other. 8) Flexible connection is made through positioning beads and O-ring seals. The upper cover (17) of the conductive nozzle is connected to the central shaft (19) of the conductive nozzle. The central shaft (19) of the conductive nozzle is connected to the drive shaft (20) of the disassembly conductive nozzle through the shaft hole. The positioning pin on the central shaft (19) of the conductive nozzle is connected to the waist-shaped groove of the drive shaft (20) of the disassembly conductive nozzle to realize the upper and lower movement limit. The drive shaft (20) of the disassembly conductive nozzle is connected to the bottom large gear (22). The large gear (22) meshes with the small gear (24). The small gear (24) is connected to the second pneumatic motor (23).

4. The device for automatically switching welding nozzles based on a robotic welding torch according to claim 1, characterized in that: The conductive nozzle tightening device (1) includes a tightening shaft (27), a third bearing (28), a drive shaft (29), a third pneumatic motor (30), and a lifting spring (31). The tightening shaft (27) and the lifting spring (31) are mounted on a shaft hole. The tightening shaft (27) and the drive shaft (29) are connected through a shaft hole. The drive shaft (29) and the third pneumatic motor (30) are connected through a coupling. After the conductive nozzle is tightened, the lifting spring (31) can continuously push the tightening shaft (27) upward so that it always maintains engagement with the conductive nozzle feeding device (2).

5. The device for automatically switching welding nozzles based on a robotic welding torch according to claim 1, characterized in that: The conductive nozzle feeding device (2) includes a conductive nozzle placement shaft (32), a meshing lifting spring (33), a connecting plate (34), and a rotary lifting cylinder (35). The rotary lifting cylinder (35) is connected to the connecting plate (34) by screws. The conductive nozzle placement shaft (32) and the meshing lifting spring (33) are engaged through a shaft hole. An oil-free bushing is provided in the middle of the connecting plate (34) to guide and lubricate the conductive nozzle placement shaft (32) as it slides up and down.

6. The device for automatically switching contact nozzles based on a robotic welding torch according to claim 1, characterized in that: The mechanical quick-lock device (36) includes a release knob (42), a center sleeve (43), a spring cavity (44), a return spring (45), and a positioning pin (46). The release knob (42) is connected to the positioning pin (46) by screws. The positioning pin (46) and the spring cavity (44) are fitted with a shaft hole. The return spring (45) and the positioning pin (46) are fitted with a shaft hole. The center sleeve (43) is installed on the head of the spring cavity (44) to ensure that the release knob (42) remains coaxial with the spring cavity (44) when it is released.

7. The device for automatically switching welding nozzles based on a robotic welding torch according to any one of claims 1 to 6, characterized in that: The equipment also includes a pneumatic sliding door device (5), a conductive nozzle installation detection device (47), and a waste conductive nozzle collection box (48).

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