Wire feeding mechanism of welding equipment

Abstract

The invention relates to the technical field of welding, in particular to a wire feeding mechanism of welding equipment, which comprises a support, a welding gun and a wire feeding structure arranged on the support, a wire feeding pipe is fixedly connected between the welding gun and a wire outlet end of the wire feeding structure, and a support frame is fixedly connected to the inner side of the support. The front side of the supporting frame is rotationally connected with a wire releasing roller used for fixing a wire reel, the rear side of the wire releasing roller penetrates through the supporting frame to be fixedly connected with a rotating rod, the outer wall of the rotating rod is fixedly connected with a rotating disc, the top of the supporting frame is fixedly connected with a fixing cylinder in a penetrating mode, a movable cutter and a fixed cutter are arranged in the fixing cylinder, and a through groove is formed in the bottom of the fixing cylinder in a penetrating mode. A winding mechanism used for driving the wire unwinding roller to wind is arranged in the supporting frame, when a wire reel needs to be replaced, a welding gun can be inserted into the fixing cylinder, molten drops of a welding wire on the welding gun are automatically cut off through mutual cooperation of the winding mechanism and the moving mechanism, then the redundant welding wire is wound on the wire reel, and therefore automatic wire unwinding of the device is achieved. And manual operation is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a wire feeding mechanism of welding equipment. Background Art

[0002] The wire feeder generally has a control part to provide parameter settings, the drive part drives the wire feeding under the control of the control part, and the wire feeding nozzle part sends the welding wire to the welding gun position. It is an automatically driven mechanized wire feeding device, which is mainly used for automatic wire feeding in manual welding, automatic wire feeding in argon arc welding, automatic wire feeding in plasma welding and automatic wire feeding in laser welding. The system adopts microcomputer control and stepping reduction motor transmission, with high wire feeding accuracy and good repeatability.

[0003] The prior art discloses a welding wire feeding device with publication number CN115519286A. After the welding device stops, the power is turned off, the electromagnet is powered off, and under the attraction of the permanent magnet, it moves downward to drive the pressure plate to press the wire reel to prevent the reel from continuing to rotate, thereby effectively preventing the welding wire from continuing to move forward. When the pressure plate moves downward, it drives the driving slider to move downward, and drives the clamping arm to clamp the wire feeding shaft through the driving slider, so that the wire feeding wheel stops rotating, thereby further ensuring that the welding wire is no longer fed forward, effectively preventing the welding wire from showing signs of looseness.

[0004] Although the welding wire can be transported during the welding process, there are still some defects in the actual welding process. Since the wire feeding mechanism lacks an automatic wire rewinding structure, after the welding wire on the wire reel is used up, workers are required to use tools to cut off the molten droplets on the end of the welding wire, and then manually rotate the wire reel in reverse to wind the excess welding wire back before replacing the new wire reel. This is not only time-consuming and labor-intensive, but also consumes a lot of time, which greatly reduces the welding efficiency of the device.

[0005] Therefore, a wire feeding mechanism of a welding device is proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a wire feeding mechanism for welding equipment.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a wire feeding mechanism of a welding equipment, comprising a bracket and a welding gun, and a wire feeding structure arranged on the bracket, a wire feeding tube is fixedly connected between the welding gun and the wire outlet end of the wire feeding structure, a support frame is fixedly connected to the inner side of the bracket, a wire unwinding roller for fixing the welding wire reel is rotatably connected to the front side of the support frame, a rotating rod is fixedly connected to the rear side of the wire unwinding roller through the support frame, a rotating disk is fixedly connected to the outer wall of the rotating rod, a fixed cylinder is fixedly connected to the top of the support frame, and a movable knife and a fixed knife are respectively arranged in the fixed cylinder, a through groove is opened through the bottom of the fixed cylinder, and a winding mechanism for driving the wire unwinding roller to wind is arranged in the support frame; The top end of the connecting plate is fixedly connected to the connecting plate, and the bottom end of the connecting plate is fixedly connected to the connecting plate, and the connecting plate is engaged with the inclined groove, and the front end of the connecting plate is fixedly connected to the inclined groove, and the supporting frame is provided with a moving mechanism for driving the sliding block and the moving knife to slide. The top of the connecting block is fixedly connected to the push rod, and the front end of the rack is fixedly connected to the U-shaped frame.

[0008] In the above technical solution, further, the width of the rack is greater than the width of the gear ring, the arc L-shaped plate is fixedly connected to the side close to the rotating disk with an anti-slip pad, and the stop block and the connecting frame are staggered.

[0009] In the above technical solution, further, an inwardly recessed groove is provided on the rear side of the inner wall of the support frame, and a pair of upper springs are fixedly connected between the groove and the fixing plate.

[0010] In the above technical solution, further, the moving mechanism includes a servo motor, the servo motor is fixedly connected to the side wall of the support frame, and the inner side of the support frame is rotatably connected with a threaded rod, the output end of the servo motor passes through the side wall of the support frame and is fixedly connected to the side wall of the threaded rod, the threaded rod is threadedly connected to the inner side wall of the sliding block, a bottom rod is provided between the connecting block and the rack and below the fixed cylinder, a material guide frame is fixedly connected to the top of the bottom rod, the movable knife is fixedly connected to the top of the material guide frame, and the fixed knife is fixedly connected to the inner side of the through slot; The front side of the bottom rod is provided with an inward-recessed bottom groove, the inner side of the bottom groove is slidably connected with an upper right-angle block, the bottom of the support frame is fixedly connected with a positioning rod between the stop block and the rack, the front side of the positioning rod is fixedly connected with a lower right-angle block, and the U-shaped frame is staggered between the end away from the gear ring and the bottom rod.

[0011] In the above technical solution, further, a lower spring is fixedly connected between the rear side of the upper right-angle block and the inner side of the bottom groove, the outer wall of the push rod abuts against the rear side of the upper right-angle block, and the lower right-angle block and the push rod are staggered.

[0012] In the above technical solution, further, a return spring is fixedly connected between the positioning rod and the bottom rod.

[0013] In the above technical solution, further, a push ring is slidably connected to the inner side of the fixed cylinder, a plurality of top springs are fixedly connected between the bottom of the push ring and the bottom end of the fixed cylinder, a touch sensor is provided at the bottom end of the fixed cylinder, and the touch sensor is electrically connected to the servo motor through a controller.

[0014] In the above technical solution, further, a limiting frame is fixedly connected to the inner side of the support frame and at a position corresponding to the material guide frame, a collecting box is slidably connected to the rear side of the support frame and at a position corresponding to the limiting frame, and the bottom end of the inner side of the material guide frame is tilted toward one side of the collecting box.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the wire reel needs to be replaced, the welding gun can be inserted into the fixed cylinder, and then the molten droplets of the welding wire on the welding gun can be automatically cut off through the cooperation of the winding mechanism and the moving mechanism, and then the excess welding wire can be wound on the wire reel, thereby realizing automatic wire retraction of the device without the need for worker operation, saving a lot of tedious steps and improving the welding efficiency of the device.

[0016] 2. Through the cooperation of the touch sensor, material guide frame, collection box and moving mechanism, not only can the wire be automatically withdrawn when the welding gun is inserted into the fixed barrel without pressing the switch control, but the cut welding wire can also be collected, which is conducive to subsequent unified processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front three-dimensional structure of the wire feeder of the present invention; Figure 2 It is a rear perspective structural schematic diagram of the wire feeder of the present invention; Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the wire feeder of the present invention; Figure 4 It is a schematic diagram of a rear-view full-section three-dimensional structure of a support frame of the present invention; Figure 5The present invention is attached Figure 4 A schematic diagram of the partially enlarged structure at center A; Figure 6 It is a schematic diagram of the full-section three-dimensional structure of the frame side of the present invention; Figure 7 It is a schematic diagram of the overall appearance structure of the winding mechanism of the present invention; Figure 8 It is a schematic diagram of the front three-dimensional structure of the fixing plate of the present invention; Fig. 9 It is a schematic diagram of a three-dimensional structure of a bottom rod of the present invention in full cross-section from the side; Fig.10 It is a schematic diagram of the top view of the winding mechanism of the present invention.

[0018] In the figure: 1, bracket; 2, wire feeding structure; 3, welding gun; 4, wire feeding tube; 5, support frame; 6, wire release roller; 7, rotating rod; 8, rotating disk; 9, fixed cylinder; 10, through groove; 11, gear ring; 12, fixed plate; 13, slide groove; 14, rack; 15, push plate; 16, arc L-shaped plate; 17, sliding block; 18, connecting block; 19, stop block; 20, inclined groove; 21, connecting frame; 22, inclined block; 23, movable knife ; 24. Fixed knife; 25. Anti-slip pad; 26. Groove; 27. Upper spring; 28. Servo motor; 29. ​​Threaded rod; 30. Push rod; 31. U-shaped frame; 32. Bottom rod; 33. Guide frame; 34. Bottom groove; 35. Upper right-angle block; 36. Lower spring; 37. Positioning rod; 38. Lower right-angle block; 39. Reset spring; 40. Push ring; 41. Top spring; 42. Touch sensor; 43. Limit frame; 44. Collection box. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0020] like Figure 1-Figure 10The wire feeding mechanism of a welding device shown in the figure comprises a bracket 1 and a welding gun 3, and a wire feeding structure 2 arranged on the bracket 1. The wire feeding structure 2 is a mature technology in the prior art and will not be described in detail here. A wire feeding tube 4 is fixedly connected between the welding gun 3 and the wire outlet end of the wire feeding structure 2. A support frame 5 is fixedly connected to the inner side of the bracket 1. A wire unwinding roller 6 for fixing a welding wire reel is rotatably connected to the front side of the support frame 5. When installing the welding wire reel, the chuck on the wire unwinding roller 6 is unscrewed, and the welding wire reel can be inserted, and the wire unwinding direction of the welding wire reel is opposite to the subsequent wire withdrawal direction. The chuck is then tightened, and the rear side of the wire-releasing roller 6 passes through the support frame 5 and is fixedly connected to a rotating rod 7, and the outer wall of the rotating rod 7 is fixedly connected to a rotating disk 8, and the top of the support frame 5 is fixedly connected to a fixed cylinder 9, and a moving knife 23 and a fixed knife 24 are respectively arranged in the fixed cylinder 9, and a through groove 10 is opened at the bottom of the fixed cylinder 9. The through groove 10 is arranged to avoid affecting the normal movement of the moving knife 23 and the slipping of the cut welding wire, and a winding mechanism for driving the wire-releasing roller 6 to rewind is arranged in the support frame 5; The winding mechanism includes a gear ring 11, a fixed plate 12 is slidably connected to the bottom end of the support frame 5, a slide groove 13 is provided on the front side of the fixed plate 12 and at a position corresponding to the rotating rod 7. The slide groove 13 is provided to prevent the fixed plate 12 from being hindered by the rotating rod 7 when sliding. The gear ring 11 is rotatably connected to the front side of the fixed plate 12 and is located on the outside of the rotating rod 7. The bottom end of the support frame 5 is slidably connected to a rack 14 meshing with the gear ring 11. A pair of push plates 15 are fixedly connected to the front side of the gear ring 11, and the front sides of the push plates 15 are fixedly connected. An arc-shaped L-shaped plate 16 is used to resist the outer side of the rotating disk 8. A sliding block 17 is provided in the support frame 5. A connecting block 18 is fixedly connected to the top end of the rear side of the sliding block 17. A resisting block 19 is fixedly connected to the bottom end of the connecting block 18. An inclined groove 20 is provided on the resisting block 19 near the fixed plate 12. A connecting frame 21 is fixedly connected to the front side of the fixed plate 12. An inclined block 22 is fixedly connected to the front side of the connecting frame 21 and fits with the inclined groove 20. A moving mechanism for driving the sliding block 17 and the moving knife 23 to slide is provided in the support frame 5. The top of the connecting block 18 is fixedly connected to a push rod 30, and the front side of the rack 14 is fixedly connected to a U-shaped frame 31. The width of the rack 14 is greater than the width of the gear ring 11, which can ensure that the gear ring 11 is still in meshing with the rack 14 after sliding. The arc-shaped L-shaped plate 16 and the side close to the rotating disk 8 are fixedly connected with an anti-skid pad 25. Through the setting of the anti-skid pad 25, the friction between the arc-shaped L-shaped plate 16 and the rotating disk 8 is increased, thereby ensuring that the wire release roller 6 can be driven to rotate normally. The stop block 19 and the connecting frame 21 are staggered to avoid being hindered by the connecting frame 21 when the stop block 19 slides over the tilting block 22, affecting the normal operation of the device. An inward groove 26 is provided on the rear side of the inner wall of the support frame 5, and a pair of upper springs 27 are fixedly connected between the groove 26 and the fixed plate 12. Through the setting of the upper spring 27, it is convenient for the stop block 19 to be reset by the elastic force of the upper spring 27 to quickly reset the fixed plate 12; During the process of the wire feeder withdrawing the wire and cutting off the molten drop on the welding gun 3, the movement of the connecting block 18 will drive the stop block 19 to move, thereby squeezing the inclined block 22 through the inclined groove 20 to drive the fixed plate 12 to slide through the connecting frame 21, thereby driving the gear ring 11, the push plate 15 and the arc-shaped L-shaped plate 16 to move, and at the same time stretching the upper spring 27 and driving the gear ring 11 to slide on the rack 14, so that the side wall of the arc-shaped L-shaped plate 16 is tightly pressed against the outer side of the rotating disk 8, and at the same time, the two anti-slip pads 25 are squeezed to ensure the tightness of the connection, and then the moving mechanism is moved. The servo motor 28 drives the push rod 30 to continue to move, which will push the U-shaped frame 31 and the rack 14 to slide, thereby driving the meshing gear ring 11 to rotate, and at the same time push the tilting block 22 to the front side of the stop block 19, thereby driving the push plate 15 and the arc-shaped L-shaped plate 16 to rotate, and then driving the rotating disk 8, the rotating rod 7 and the wire-releasing roller 6 to rotate, thereby realizing automatic winding of excess welding wire without the need for worker operation, eliminating a large number of tedious steps, and improving the welding efficiency of the device. Finally, the welding wire reel is removed from the wire-releasing roller 6, and the servo motor 28 is controlled to rotate in the opposite direction for reset.

[0021] In order to automatically cut off the molten droplet on the welding gun 3 and avoid the molten droplet getting stuck and affecting the normal wire withdrawal of the device, the moving mechanism includes a servo motor 28, the servo motor 28 is fixedly connected to the side wall of the support frame 5, and the inner side of the support frame 5 is rotatably connected with a threaded rod 29, the output end of the servo motor 28 passes through the side wall of the support frame 5 and is fixedly connected to the side wall of the threaded rod 29, the threaded rod 29 is threadedly connected to the inner wall of the sliding block 17, a bottom rod 32 is provided between the connecting block 18 and the rack 14 and below the fixed cylinder 9, the top of the bottom rod 32 is fixedly connected to a material guide frame 33, the moving knife 23 is fixedly connected to the top of the material guide frame 33, and the fixed knife 24 is fixedly connected to the inner side of the through groove 10; The front side of the bottom rod 32 is provided with a sunken bottom groove 34, and the inner side of the bottom groove 34 is slidably connected with an upper right-angle block 35. A positioning rod 37 is fixedly connected to the bottom of the support frame 5 and located between the abutting block 19 and the rack 14. The front side of the positioning rod 37 is fixedly connected to a lower right-angle block 38. The U-shaped frame 31 is staggered between the end away from the gear ring 11 and the bottom rod 32 to prevent the other end from being hindered by the bottom rod 32 when the sliding block 17 pushes the U-shaped frame 31 to move. A lower spring 36 is fixedly connected between the rear side of the upper right-angle block 35 and the inner side of the bottom groove 34. The outer wall of the push rod 30 abuts against the rear side of the upper right-angle block 35, and the lower right-angle block 38 and the push rod 30 are staggered. This can prevent the lower right-angle block 38 from squeezing the upper right-angle block 35 into the bottom groove 34 and hindering the continued movement of the push rod 30, and will not affect the pushing of the upper right-angle block 35. A return spring 39 is fixedly connected between the positioning rod 37 and the bottom rod 32. When the welding wire reel needs to be replaced, the welding gun 3 is first inserted into the fixed cylinder 9, and then the servo motor 28 is started to drive the threaded rod 29 to rotate, thereby driving the threaded sliding block 17 to move, and at the same time driving the connecting block 18 and the push rod 30 to move. At this time, the outer wall of the push rod 30 is against the vertical surface of the upper right-angle block 35, thereby pushing the upper right-angle block 35 and the bottom rod 32 to move, and at the same time compressing the reset spring 39, thereby driving the guide frame 33 and the moving knife 23 to move, and the contact between the moving knife 23 and the fixed knife 24 is used to cut off the molten droplet part on the welding gun 3; At the same time, the push rod 30 pushes the upper right-angle block 35 to move to the side of the lower right-angle block 38. As the push rod 30 continues to move, the upper right-angle block 35 is squeezed by the inclined surface of the lower right-angle block 38 and slides into the bottom groove 34 to squeeze the lower spring 36, thereby pushing the upper right-angle block 35 out of the contact position with the push rod 30. Then the push rod 30 continues to slide. When it slides out of the front side of the upper right-angle block 35, the elastic force of the reset spring 39 will push the bottom rod 32 to reset. At the same time, the elastic force of the lower spring 36 will push the upper right-angle block 35 to reset, thereby completing the automatic cutting off of the molten drop on the welding gun 3. Moreover, when the push rod 30 is reset, the inclined surface of the upper right-angle block 35 will be squeezed to make it slide into the bottom groove 34 until the upper right-angle block 35 is reset after the push rod 30 is removed, thereby ensuring that the push rod 30 can push the upper right-angle block 35 to move during subsequent use.

[0022] In order to improve the automation efficiency of the device, a push ring 40 is slidably connected to the inner side of the fixed cylinder 9, and a plurality of top springs 41 are fixedly connected between the bottom of the push ring 40 and the inner bottom end of the fixed cylinder 9. A touch sensor 42 is provided at the inner bottom end of the fixed cylinder 9, and the touch sensor 42 is electrically connected to the servo motor 28 through the controller; When the welding gun 3 is inserted into the fixed tube 9 during the wire withdrawal process, the insertion of the end of the welding gun 3 causes squeezing of the push ring 40, thereby compressing the top spring 41. Then, when the push ring 40 is squeezed to the bottom end of the fixed tube 9, it touches the touch sensor 42 at the bottom, and then transmits the signal to the controller. The controller controls the servo motor 28 to start automatically cutting the molten droplet, and then reels the remaining welding wire, thereby eliminating the need for workers to press the switch, further improving the working efficiency of the device.

[0023] In order to facilitate the collection of the cut welding wire, a limit frame 43 is fixedly connected to the inner side of the support frame 5 and at a position corresponding to the guide frame 33, and a collection box 44 is slidably connected to the rear side of the support frame 5 and at a position corresponding to the limit frame 43, and the inner bottom end of the guide frame 33 is tilted toward the side of the collection box 44; During the wire withdrawal process, the cut welding wire falls into the material guide frame 33 by its own gravity, and then due to the inclined setting of the bottom end of the material guide frame 33, the fallen welding wire will fall into the collection box 44 by its own gravity, thereby achieving the effect of centralized collection of the cut welding wire, which is beneficial to subsequent unified processing. When it is necessary to clean the welding wire, pull the handle on the collection box 44 to pull out the collection box 44 and pour out the welding wire.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A wire feeding mechanism of a welding device, comprising a support (1) and a welding gun (3), and a wire feeding structure (2) arranged on the support (1), wherein a wire feeding tube (4) is fixedly connected between the welding gun (3) and a wire outlet end of the wire feeding structure (2), and characterized in that: The support frame (1) is fixedly connected to the inner side of the bracket (1); a wire-releasing roller (6) for fixing the welding wire reel is rotatably connected to the front side of the support frame (5); a rotating rod (7) is fixedly connected to the rear side of the wire-releasing roller (6) through the support frame (5); a rotating disk (8) is fixedly connected to the outer wall of the rotating rod (7); a fixed cylinder (9) is fixedly connected to the top of the support frame (5); a movable knife (23) and a fixed knife (24) are respectively provided in the fixed cylinder (9); a through groove (10) is provided in the bottom of the fixed cylinder (9); and a winding mechanism for driving the wire-releasing roller (6) to wind is provided in the support frame (5); The winding mechanism comprises a gear ring (11), a fixed plate (12) is slidably connected to the bottom end of the support frame (5), a slide groove (13) is provided on the front side of the fixed plate (12) and at a position corresponding to the rotating rod (7), the gear ring (11) is rotatably connected to the front side of the fixed plate (12) and is located on the outside of the rotating rod (7), a rack (14) meshing with the gear ring (11) is slidably connected to the bottom end of the support frame (5), a pair of push plates (15) are fixedly connected to the front side of the gear ring (11), and the front sides of the push plates (15) are fixedly connected to an arc-shaped L-shaped plate (16) for resisting the outside of the rotating disk (8), and a sliding block (17) is provided in the support frame (5). The top end of the rear side of the sliding block (17) is fixedly connected to a connecting block (18), the bottom end of the connecting block (18) is fixedly connected to a stop block (19), a side of the stop block (19) close to the fixed plate (12) is provided with an inclined groove (20), the front side of the fixed plate (12) is fixedly connected to a connecting frame (21), the front side of the connecting frame (21) is fixedly connected to an inclined block (22) and fits with the inclined groove (20), a moving mechanism for driving the sliding block (17) and the moving knife (23) to slide is provided in the support frame (5), a push rod (30) is fixedly connected to the top of the connecting block (18), and a U-shaped frame (31) is fixedly connected to the front side of the rack (14).

2. The wire feeding mechanism of a welding device according to claim 1, characterized in that: The width of the rack (14) is greater than the width of the gear ring (11); a non-slip pad (25) is fixedly connected to the side of the arc-shaped L-shaped plate (16) close to the rotating disk (8); and the stop block (19) and the connecting frame (21) are arranged in an alternating manner.

3. The wire feeding mechanism of a welding device according to claim 1, characterized in that: An inwardly recessed groove (26) is provided on the rear side of the inner wall of the support frame (5), and a pair of upper springs (27) are fixedly connected between the groove (26) and the fixing plate (12).

4. The wire feeding mechanism of a welding device according to claim 1, characterized in that: The moving mechanism comprises a servo motor (28), the servo motor (28) is fixedly connected to the side wall of the support frame (5), and a threaded rod (29) is rotatably connected to the inner side of the support frame (5), an output end of the servo motor (28) passes through the side wall of the support frame (5) and is fixedly connected to the side wall of the threaded rod (29), the threaded rod (29) is threadedly connected to the inner side wall of the sliding block (17), a bottom rod (32) is provided between the connecting block (18) and the rack (14) and below the fixed cylinder (9), a material guide frame (33) is fixedly connected to the top of the bottom rod (32), the movable knife (23) is fixedly connected to the top of the material guide frame (33), and the fixed knife (24) is fixedly connected to the inner side of the through groove (10); The front side of the bottom rod (32) is provided with an inwardly sunken bottom groove (34), the inner side of the bottom groove (34) is slidably connected to an upper right-angle block (35), the bottom of the support frame (5) is fixedly connected to a positioning rod (37) between the stop block (19) and the rack (14), the front side of the positioning rod (37) is fixedly connected to a lower right-angle block (38), and the U-shaped frame (31) is staggeredly arranged between the end away from the gear ring (11) and the bottom rod (32).

5. The wire feeding mechanism of a welding device according to claim 4, characterized in that: A lower spring (36) is fixedly connected between the rear side of the upper right-angle block (35) and the inner side of the bottom groove (34); the outer wall of the push rod (30) abuts against the rear side of the upper right-angle block (35); and the lower right-angle block (38) and the push rod (30) are arranged alternately.

6. The wire feeding mechanism of a welding device according to claim 4, characterized in that: A return spring (39) is fixedly connected between the positioning rod (37) and the bottom rod (32).

7. The wire feeding mechanism of a welding device according to claim 4, characterized in that: A push ring (40) is slidably connected to the inner side of the fixed cylinder (9); a plurality of top springs (41) are fixedly connected between the bottom of the push ring (40) and the inner bottom end of the fixed cylinder (9); a touch sensor (42) is provided at the inner bottom end of the fixed cylinder (9); and the touch sensor (42) is electrically connected to the servo motor (28) via a controller.

8. The wire feeding mechanism of a welding device according to claim 4, characterized in that: A limiting frame (43) is fixedly connected to the inner side of the support frame (5) and at a position corresponding to the material guide frame (33); a collecting box (44) is slidably connected to the rear side of the support frame (5) and at a position corresponding to the limiting frame (43); the inner bottom end of the material guide frame (33) is tilted toward one side of the collecting box (44).

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