Automobile fan rotating shaft welding device

Abstract

The invention relates to the technical field of welding devices, and discloses an automobile fan rotating shaft welding device which comprises a portal frame, a movable welding gun is arranged on the portal frame, a wire feeding pipe is arranged on one side of the welding gun, a wire feeding head is arranged at the end of the wire feeding pipe, and the wire feeding pipe is elastically connected with the wire feeding head through a reset spring; a cleaning mechanism is arranged on one side of the portal frame and comprises a liftable cleaning head, a base is arranged on one side of the cleaning head, a first air cylinder is arranged on the base, a pull rod is arranged on a piston rod of the first air cylinder, and a first motor used for adjusting the angle of the wire feeding pipe is arranged on a gun body of the welding gun. The wire feeding head and the wire feeding pipe which can be separated are arranged, during cleaning, a large gap can be reserved between the wire feeding pipe and the wire feeding head, and even if part of impurities are pushed away by the cleaning head, the wire feeding head and the wire feeding pipe can be conveniently cleaned.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding device for automotive fan shafts. Background Technology

[0002] Automotive fan shafts are often constructed from multiple segments joined together, such as a smooth shaft and a splined shaft, or a short shaft and a long shaft. Welding between the fan shaft and the fan blades is also possible. The two most common welding methods used in the manufacturing of automotive fan shafts are electric arc welding and plasma arc welding. Simply put, plasma arc welding is an upgraded version of electric arc welding. Its principle is to use a compressed electric arc as a heat source for welding, resulting in higher energy density, a more stable arc column, and a smaller heat-affected zone, making it suitable for machining precision shaft parts.

[0003] In some cases, when there are gaps in the assembly or when it is necessary to increase the strength of the weld, filler wire is required during the welding process, which necessitates the use of an automatic wire feeding mechanism. Automatic wire feeding mechanisms often encounter problems with poor wire feeding during use. The main reasons for this are threefold: 1. Problems with the welding wire itself: bending, knotting, arching, rust, oxidation, and uneven material of the welding wire can all cause poor wire feeding; 2. Malfunctions in the wire feeding mechanism: wear on the wire feeding wheel, foreign objects, or improper pressure; 3. Blockage in the wire guide tube: the end of the welding torch, the wire guide nozzle, is close to the molten pool, and welding spatter easily sticks to the nozzle, clogging the wire channel. In existing technology, to address the problem of blocked wire guide nozzles, the machine is usually stopped first, and then the nozzle is manually cleared using a cleaning rod. However, existing wire guide nozzles and wire guide tubes are mostly fixed by threads or screws. When clearing with a cleaning rod, the rod can easily push the blockage deeper into the wire guide tube, making cleaning inconvenient. Summary of the Invention

[0004] This invention provides a welding device for automotive fan shafts, which features a detachable wire feeding tube and wire feeding head. This design reduces the likelihood of blockages being pushed deep into the wire feeding tube during unblocking, resulting in better cleaning. It solves the problem mentioned in the background art where, when using a wire guide for unblocking, the wire guide rod easily pushes blockages at the wire guide nozzle deep into the wire guide tube, causing inconvenience for cleaning.

[0005] The present invention provides the following technical solution: a welding device for automotive fan shaft, including a gantry frame, a movable welding torch on the gantry frame, a wire feeding tube on one side of the welding torch, a wire feeding head at the end of the wire feeding tube, and the wire feeding tube and the wire feeding head being elastically connected by a return spring.

[0006] The gantry frame is provided with a cleaning mechanism on one side, and the cleaning mechanism includes a liftable cleaning head. The cleaning head is provided with a base on one side, and a first cylinder is provided on the base. A pull rod is provided on the piston rod of the first cylinder. A first motor for adjusting the angle of the wire feeding tube is provided on the body of the welding gun.

[0007] As an optional embodiment of the automotive fan shaft welding device of the present invention, the wire feeding head is provided with a first cavity, and a movable seat is provided in the first cavity. A guide rod is provided on the wire feeding tube, and one end of the guide rod passes through the wire feeding head and is fixedly connected to the movable seat.

[0008] As an optional embodiment of the automotive fan shaft welding device of the present invention, the wire feeding head is further provided with a second cavity, and a nozzle is provided on the upper side of the second cavity. One end of the nozzle is connected to the second cavity, and a flow channel for connecting the first cavity and the second cavity is opened in the wire feeding head.

[0009] As an optional embodiment of the automotive fan shaft welding device of the present invention, wherein: one end of the movable seat is provided with a piston, and the piston and the movable seat are elastically connected by a first spring;

[0010] The wire feeding head is provided with a limiting block for limiting the piston, and the limiting block is elastically connected to the wire feeding head through a second spring. One end of the limiting block is provided with an inclined surface, and the wire feeding tube is provided with an extension rod, and the position of the extension rod is opposite to the limiting block.

[0011] As an optional embodiment of the automotive fan shaft welding device of the present invention, wherein: an extension block is provided on the outer side of the wire feeding head, and the extension block is elastically connected to the wire feeding head by a second spring, and a top rod is provided on the extension block.

[0012] As an optional embodiment of the automotive fan shaft welding device of the present invention, the nozzle is elastically connected to the wire feed head through a torsion spring, and the nozzle is provided with a protrusion and a slope on the protrusion. One end of the push rod passes through the wire feed head and abuts against the end of the protrusion with the slope.

[0013] As an optional embodiment of the automotive fan shaft welding device of the present invention, the wire feeding head is provided with a locking block, and the locking block is elastically connected to the wire feeding head by a third spring. One end of the locking block extends into the first cavity. The guide rod is provided with a groove that fits with the locking block. The gantry is provided with an adjustment mechanism for adjusting the locking block.

[0014] As an optional embodiment of the automotive fan shaft welding device of the present invention, the adjusting mechanism includes an extension block, and one end of the extension block is fixedly connected to the welding gun.

[0015] As an optional embodiment of the automotive fan shaft welding device of the present invention, the adjusting mechanism includes an adjusting ring, which is slidably connected to the wire feeding head, and the adjusting ring is fixedly connected to the extension block through a connecting rod, and one end of the locking block is provided with an inclined surface.

[0016] As an optional embodiment of the automotive fan shaft welding device of the present invention, the base is provided with a second cylinder, and the piston rod of the second cylinder is provided with a drive motor, the output shaft of the drive motor being fixedly connected to the cleaning head.

[0017] The present invention has the following beneficial effects:

[0018] 1. This automotive fan shaft welding device uses a liftable cleaning head to unclog the wire guide assembly. Since the cleaning head is inserted into the wire feed head from the outside in, to prevent impurities from being pushed deep into the wire feed head during the unclogging process, the wire feed head and the wire feed tube are separable. A pull rod is provided at the base. When the entire welding mechanism reaches the cleaning mechanism, the wire feed head is first pulled down by the pull rod to separate it from the wire feed tube. Then, the cleaning head is used to unclog the wire feed head. Since there is a large gap between the wire feed tube and the wire feed head at this time, even if some impurities are pushed deep into the wire feed tube by the cleaning head, they can be cleaned relatively easily.

[0019] 2. This automotive fan shaft welding device, by setting a wire feeding tube with a guide rod, on the one hand, with the cooperation of the return spring and the guide rod, can make the movement of the wire feeding head more stable when separating. On the other hand, by setting a first cavity with a piston inside and a wire feeding head with a nozzle, when the wire feeding head moves under the pull of the pull rod, the wire feeding tube and the guide rod remain stationary. Correspondingly, the piston slides in the first cavity, and gas is drawn into the first cavity. After cleaning, the wire feeding head moves closer to the wire feeding tube. During this process, the piston slides again in the first cavity, and the gas enters the second cavity through the flow channel and is sprayed out through the nozzle. The nozzle can clean the impurities on the top of the wire feeding head.

[0020] By setting a limiting block on the wire feeding head to limit the piston, and correspondingly, an extension rod is provided on the wire feeding tube, the limiting block can limit the piston, thereby causing the first spring to store force. After cleaning, the wire feeding head and the wire feeding tube gradually approach each other. When they reach the predetermined position, the extension rod and the limiting block abut against each other. Under the push of the extension rod, the limiting block overcomes the resistance of the second spring and moves. The limiting block is pulled out of the first cavity. After the limiting block is no longer restricted, the piston moves quickly in the first cavity under the push of the first spring. At this time, the gas will be ejected from the nozzle at a faster flow rate, resulting in a better cleaning effect.

[0021] 3. This automotive fan shaft welding device, by setting a wire feeding head with an extension block, on the one hand, the pull rod cooperates with the extension block to pull the wire feeding head and the wire feeding tube apart, on the other hand, the extension block is equipped with a push rod, which can cause the nozzle to deflect, so that it can perform a swirling spray action when spraying air, resulting in fewer dead corners and better cleaning effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a test diagram for the present invention.

[0024] Figure 3 This is a schematic diagram of the wire feeding tube and wire feeding head in a separated state according to the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the wire feeder of the present invention.

[0026] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0027] Figure 6 This is a schematic diagram of the adjustment mechanism in Embodiment 5 of the present invention.

[0028] Figure 7 This is a schematic diagram showing the relative position structure of the limiting block and the first cavity in this invention.

[0029] In the diagram: 1. Gantry frame; 2. Welding torch; 3. Wire feed tube; 4. Wire feed head; 401. First cavity; 402. Second cavity; 5. Return spring; 6. Cleaning head; 7. Base; 8. First cylinder; 9. Pull rod; 10. First motor; 11. Movable seat; 12. Guide rod; 1201. Groove; 13. Nozzle; 14. Piston; 15. First spring; 16. Limiting block; 17. Second spring; 18. Extension rod; 19. Extension block; 20. Third spring; 21. Top rod; 22. Torsion spring; 23. Protrusion; 24. Locking block; 25. Fourth spring; 26. Limiting rod; 27. Second cylinder; 28. Adjusting ring; 29. ​​Connecting rod; 30. Drive motor. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1, please refer to Figures 1 to 7 A welding device for automotive fan shaft includes a gantry frame 1, a movable welding torch 2 on the gantry frame 1, a wire feeding tube 3 on one side of the welding torch 2, a wire feeding head 4 at the end of the wire feeding tube 3, and a return spring 5 elastically connecting the wire feeding tube 3 and the wire feeding head 4.

[0032] A cleaning mechanism is provided on one side of the gantry frame 1, and the cleaning mechanism includes a liftable cleaning head 6. A base 7 is provided on one side of the cleaning head 6, and a first cylinder 8 is provided on the base 7. A pull rod 9 is provided on the piston rod of the first cylinder 8. A first motor 10 for adjusting the angle of the wire feeding tube 3 is provided on the body of the welding torch 2.

[0033] The base 7 is equipped with a second cylinder 27, and the piston rod of the second cylinder 27 is equipped with a drive motor 30. The output shaft of the drive motor 30 is fixedly connected to the cleaning head 6.

[0034] A movable processing table is provided on the lower side of the gantry frame 1. During processing, the workpiece is fixed on the processing table by a clamp. A sliding table that can move left and right is provided on the gantry frame 1. The welding torch 2 is fixed on the sliding table and can move left and right under the drive of the sliding table. A cylinder is also provided on the sliding table, which can push the welding torch 2 to rise and fall, facilitating the processing of the workpiece. A wire guide assembly for wire feeding is provided on one side of the welding torch 2, consisting of a wire feeding tube 3 and a wire feeding head 4. Correspondingly, a cleaning mechanism is provided on one side of the gantry frame 1. The wire guide assembly can be cleaned by a lifting cleaning head 6. To unclog the parts, under normal circumstances, the wire feed head 4 is set at an angle on one side of the welding gun 2. In order to facilitate cleaning, this technical solution sets a first motor 10 at the welding gun 2. The first motor 10 is fixedly connected to the welding gun 2, and the wire feed tube 3 is rotatably connected to the welding gun 2 through a bearing. The output shaft of the first motor 10 is fixedly connected to the wire feed tube 3. The tilt angle of the wire feed tube 3 can be adjusted by the first motor 10 so that it is in a state perpendicular to the ground. In this way, when the cleaning head 6 is raised, it can be inserted into the wire feed tube 3 to unclog the wire feed head 4.

[0035] Since the cleaning head 6 is inserted into the wire feeding head 4 from the outside in, to prevent impurities from being pushed deep into the wire feeding head 4 during the unblocking process, the wire feeding tube 3 and the wire feeding head 4 in this technical solution are separable. During normal use, they are together; during cleaning, they are separated. Specifically, the wire feeding tube 3 and the wire feeding head 4 are elastically connected by a return spring 5. To improve their stability, a guide rod 12 is also provided on the wire feeding tube 3, with one end of the guide rod 12 slidably connected to the wire feeding head 4. Correspondingly, a pull rod 9 is provided at the base 7. When the entire welding mechanism reaches the cleaning mechanism, the wire feeding head 4 is first pulled downwards by the pull rod 9, thus separating the wire feeding head 4 from the wire feeding tube 3. Then, the cleaning head 6 can be used to unblock the wire feeding head 4. Because a large gap remains between the wire feeding tube 3 and the wire feeding head 4 at this time, even if some impurities are pushed deep into the wire feeding head 4 by the cleaning head 6, they can be cleaned through this gap, making it more convenient.

[0036] The cleaning head 6 can be rotated by the drive motor 30 to improve its cleaning effect, and the drive motor 30 can be raised and lowered by the second cylinder 27.

[0037] Example 2 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 The wire feeding head 4 has a first cavity 401 inside, and a movable seat 11 is provided inside the first cavity 401. The wire feeding tube 3 is provided with a guide rod 12, and one end of the guide rod 12 passes through the wire feeding head 4 and is fixedly connected to the movable seat 11.

[0038] The wire feeding head 4 is also provided with a second cavity 402, and a nozzle 13 is provided on the upper side of the second cavity 402. One end of the nozzle 13 is connected to the second cavity 402. The wire feeding head 4 is provided with a flow channel for connecting the first cavity 401 and the second cavity 402.

[0039] A piston 14 is provided at one end of the movable seat 11, and the piston 14 and the movable seat 11 are elastically connected by a first spring 15.

[0040] The wire feeding head 4 is provided with a limiting block 16 for limiting the piston 14, and the limiting block 16 is elastically connected to the wire feeding head 4 through a second spring 17. One end of the limiting block 16 is provided with an inclined surface, and the wire feeding tube 3 is provided with an extension rod 18, and the position of the extension rod 18 is opposite to the limiting block 16.

[0041] During cleaning, most impurities are brushed off by the rotating cleaning head 6, while a small portion of impurities are pushed by the cleaning head 6 to the gap between the wire feeding head 4 and the wire feeding tube 3, and remain at the top of the wire feeding head 4. To solve the above problem, this technical solution provides a nozzle 13 at one end of the wire feeding head 4 near the wire feeding tube 3. Under normal circumstances, the nozzle 13 can be directly supplied with air by an external air source. When it is inconvenient to supply air by an external air source, air can be supplied by the air supply mechanism built into the wire feeding head 4. Specifically, a first cavity 401 and a second cavity 402 are provided in the wire feeding head 4. The nozzle 13 is connected to the second cavity 402. A piston 14 is provided in the first cavity 401. The first cavity 401 and the second cavity 402 are connected by a flow channel. Air can be supplied to the second cavity 402 and the nozzle 13 through the first cavity 401 with the piston 14.

[0042] When the wire feeding head 4 moves under the pull of the pull rod 9, the wire feeding tube 3 and the guide rod 12 remain stationary. Correspondingly, the movable seat 11 and the piston 14 slide in the first cavity 401. Gas is drawn into the first cavity 401. After cleaning, the wire feeding head 4 needs to rejoin the wire feeding tube 3. The wire feeding head 4 moves closer to the wire feeding tube 3. During this process, the piston 14 slides again in the first cavity 401. Under the push of the piston 14, the gas enters the second cavity 402 through the flow channel and is sprayed out through the nozzle 13. The nozzle 13 can clean the impurities on the top of the wire feeding head 4.

[0043] To further improve the cleaning effect, this technical solution also includes a limiting block 16 on the wire feeding head 4 to limit the piston 14. The limiting block 16 is elastically connected to the wire feeding head 4. Correspondingly, the wire feeding tube 3 is provided with an extension rod 18 to... Figure 7For example, when the movable seat 11 and piston 14 move upward, they will abut against the inclined surface on the limiting block 16, thereby pushing the limiting block 16 to move and thus avoid the limiting block 16. At this time, the presence of the limiting block 16 will not hinder the movement of the movable seat 11 and piston 14. When the movable seat 11 and piston 14 move downward, piston 14 will abut against the flat surface on the limiting block 16. At this time, the presence of the limiting block 16 will hinder the movement of piston 14. That is to say, at this time, piston 14 stops moving, while the movable seat 11 is on the guide rod 1. Driven by 2, the movement continues. At this time, the first spring 15 stores power. As the wire feeding head 4 and the wire feeding tube 3 gradually approach each other, the inclined surface on the extension rod 18 abuts against the limiting block 16. Under the push of the extension rod 18, the limiting block 16 overcomes the resistance of the second spring 17 and moves. The limiting block 16 is pulled out from the first cavity 401. After the limitation of the limiting block 16 is removed, the piston 14 moves quickly in the first cavity 401 under the push of the first spring 15. At this time, the gas will be ejected from the nozzle 13 at a faster flow rate, resulting in a better cleaning effect.

[0044] It should be noted that the movable seat 11 is also provided with an inclined surface, so the presence of the limiting block 16 will not affect the up and down movement of the movable seat 11. In order to improve the cleaning effect, a one-way valve (not shown in the figure) is provided in the first cavity 401. The one-way valve can control the unidirectional entry of external gas into the first cavity 401. When air blowing is required, the gas in the first cavity 401 will not flow out through other air intake channels, but will only be sprayed out through the nozzle 13.

[0045] Example 3 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 An extension block 19 is provided on the outer side of the wire feeding head 4, and the extension block 19 is elastically connected to the wire feeding head 4 through a third spring 20. A push rod 21 is provided on the extension block 19.

[0046] The nozzle 13 is elastically connected to the wire feeding head 4 via a torsion spring 22, and the nozzle 13 is provided with a protrusion 23, which is provided with a slope. One end of the push rod 21 passes through the wire feeding head 4 and abuts against the end of the protrusion 23 with the slope.

[0047] To further improve the cleaning effect, this technical solution provides an extension block 19 on the outside of the wire feeding head 4. The extension block 19 has two functions: First, the extension block 19 protrudes outward from the inside of the wire feeding head 4. During cleaning, the pull rod 9 will abut against the extension block 19, thereby pulling the wire feeding head 4 downward through the extension block 19. Second, the extension block 19 is provided with a push rod 21. The push rod 21 originally abuts against the protrusion 23 on the nozzle 13. At this time, the torsion spring 22 stores force. When the pull rod 9 pulls the extension block 19 downward, since the resistance of the return spring 5 is greater than that of the third spring 20, the extension block 19 will first overcome the resistance of the third spring 20 and slide relative to the wire feeding head 4. Then the extension block 19 moves to its limit position and stops moving. Then the pull rod 9... Pulled by the wire feed head 4, the extension rod 21 moves down synchronously with the wire feed tube 3. During this process, the push rod 21 separates from the protrusion 23, and the nozzle 13 rotates under the drive of the torsion spring 22. When the wire feed head 4 rejoins the wire feed tube 3, the extension rod 18 will first release the limit block 16 from the piston 14. Then the first motor 10 works, the wire feed tube 3 and the wire feed head 4 deflect, the extension block 19 separates from the pull rod 9, and the extension block 19 returns to its original position under the drive of the third spring 20. During this process, the push rod 21 abuts against the inclined surface on the protrusion 23. Under the push of the push rod 21, the protrusion 23 carries the nozzle 13 to overcome the resistance of the torsion spring 22 and rotate, achieving a swirling spray effect of the nozzle 13, which can more thoroughly clean the impurities on the top of the wire feed head 4.

[0048] It should be noted that the pull rod 9 is L-shaped. When the wire feeding head 4 deflects, the extension block 19 is offset from the pull rod 9. When the wire feeding head 4 is in a state perpendicular to the ground, the wire feeding head 4 intersects with the pull rod 9. Under the pull of the first cylinder 8, the pull rod 9 moves and then contacts the extension block 19.

[0049] Example 4 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 The wire feeding head 4 is provided with a locking block 24, and the locking block 24 is elastically connected to the wire feeding head 4 through a fourth spring 25. One end of the locking block 24 extends into the first cavity 401. The guide rod 12 is provided with a groove 1201 that fits with the locking block 24. The gantry frame 1 is provided with an adjustment mechanism for adjusting the locking block 24.

[0050] The adjustment mechanism includes a limit rod 26, and one end of the limit rod 26 is fixedly connected to the welding torch 2.

[0051] Since the wire feeding head 4 and the wire feeding tube 3 are separable, to prevent accidental separation during wire feeding, this technical solution also provides a locking block 24 on the wire feeding head 4. Correspondingly, a groove 1201 that matches the locking block 24 is provided on the guide rod 12. During operation, the locking block 24 engages with the guide rod 12. When cleaning is required, the position of the locking block 24 can be adjusted by the adjustment mechanism. Specifically, the locking block 24 is elastically connected to the wire feeding head 4 through a fourth spring 25. Under normal circumstances, the fourth spring 25 will provide the locking block 24 with a distance away from the guide rod 12. When the wire feed head 4 approaches the welding torch 2, the limiting rod 26 will abut against one end of the locking block 24. Under the push of the limiting rod 26, the locking block 24 overcomes the resistance of the fourth spring 25 and engages with the guide rod 12. When cleaning is required, the position of the wire feed tube 3 is first adjusted by the first motor 10 to make it deflect. As the wire feed tube 3 deflects, the distance between the wire feed head 4 and the welding torch 2 increases. At this time, the limiting rod 26 will separate from the locking block 24. After the limitation of the limiting rod 26 is removed, the locking block 24 will separate from the guide rod 12 again under the action of the fourth spring 25. At this time, the wire feed head 4 can move freely.

[0052] Example 5 is an explanation based on Example 1. For details, please refer to [link / reference]. Figures 1 to 7 The adjustment mechanism includes an adjustment ring 28, which is slidably connected to the wire feeding head 4, and the adjustment ring 28 is fixedly connected to the extension block 19 via a connecting rod 29. One end of the locking block 24 is provided with an inclined surface.

[0053] This embodiment discloses another technical solution for the adjustment mechanism, which includes an adjustment ring 28. The adjustment ring 28 is sleeved on the wire feeding head 4 and is fixedly connected to the extension block 19 through the connecting rod 29. Under normal circumstances, the fourth spring 25 will provide a force to the locking block 24 away from the guide rod 12. When the adjustment ring 28 and the locking block 24 come into contact, the locking block 24 overcomes the resistance of the fourth spring 25 and engages with the guide rod 12 under the push of the adjustment ring 28. When cleaning is required, the extension block 19 is pulled down by the pull rod 9. As the extension block 19 moves, the adjustment ring 28 separates from the locking block 24. After the restriction of the adjustment ring 28 is removed, the locking block 24 is driven by the fourth spring 25 and separates from the guide rod 12 again. At this time, the wire feeding head 4 can move.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A welding device for automotive fan shafts, comprising a gantry (1), characterized in that: The gantry frame (1) is equipped with a movable welding torch (2), and a wire feeding tube (3) is provided on one side of the welding torch (2). A wire feeding head (4) is provided at the end of the wire feeding tube (3), and the wire feeding tube (3) and the wire feeding head (4) are elastically connected by a return spring (5). The gantry (1) is provided with a cleaning mechanism on one side, and the cleaning mechanism includes a liftable cleaning head (6). The cleaning head (6) is provided with a base (7) on one side, and a first cylinder (8) is provided on the base (7). A pull rod (9) is provided on the piston rod of the first cylinder (8). A first motor (10) for adjusting the angle of the wire feeding tube (3) is provided on the body of the welding gun (2).

2. The automotive fan shaft welding device according to claim 1, characterized in that: The wire feeding head (4) has a first cavity (401) inside, and a movable seat (11) is provided inside the first cavity (401). The wire feeding tube (3) is provided with a guide rod (12), and one end of the guide rod (12) passes through the wire feeding head (4) and is fixedly connected to the movable seat (11).

3. The automotive fan shaft welding device according to claim 2, characterized in that: The wire feeding head (4) is also provided with a second cavity (402), and a nozzle (13) is provided on the upper side of the second cavity (402). One end of the nozzle (13) is connected to the second cavity (402), and a flow channel for connecting the first cavity (401) and the second cavity (402) is opened in the wire feeding head (4).

4. The automotive fan shaft welding device according to claim 3, characterized in that: One end of the movable seat (11) is provided with a piston (14), and the piston (14) and the movable seat (11) are elastically connected by a first spring (15); The wire feeding head (4) is provided with a limiting block (16) for limiting the piston (14), and the limiting block (16) is elastically connected to the wire feeding head (4) through a second spring (17). One end of the limiting block (16) is provided with an inclined surface. The wire feeding tube (3) is provided with an extension rod (18), and the position of the extension rod (18) is opposite to the limiting block (16).

5. The automotive fan shaft welding device according to claim 4, characterized in that: The outer side of the wire feeding head (4) is provided with an extension block (19), and the extension block (19) is elastically connected to the wire feeding head (4) through a third spring (20). The extension block (19) is provided with a top rod (21).

6. The automotive fan shaft welding device according to claim 5, characterized in that: The nozzle (13) is elastically connected to the wire feeding head (4) via a torsion spring (22), and the nozzle (13) is provided with a protrusion (23), the protrusion (23) is provided with a slope, one end of the push rod (21) passes through the wire feeding head (4) and abuts against the end of the protrusion (23) with the slope.

7. The automotive fan shaft welding device according to claim 6, characterized in that: The wire feeding head (4) is provided with a locking block (24), and the locking block (24) is elastically connected to the wire feeding head (4) through a fourth spring (25). One end of the locking block (24) extends into the first cavity (401). The guide rod (12) is provided with a groove (1201) that fits with the locking block (24). The gantry frame (1) is provided with an adjustment mechanism for adjusting the locking block (24).

8. The automotive fan shaft welding device according to claim 7, characterized in that: The adjustment mechanism includes a limiting rod (26), and one end of the limiting rod (26) is fixedly connected to the welding gun (2).

9. The automotive fan shaft welding device according to claim 7, characterized in that: The adjustment mechanism includes an adjustment ring (28), which is slidably connected to the wire feeding head (4), and the adjustment ring (28) is fixedly connected to the extension block (19) through a connecting rod (29). One end of the locking block (24) is provided with an inclined surface.

10. The automotive fan shaft welding device according to claim 1, characterized in that: The base (7) is provided with a second cylinder (27), and the piston rod of the second cylinder (27) is provided with a drive motor (30), the output shaft of the drive motor (30) is fixedly connected to the cleaning head (6).

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