A push-pull wire feeding mechanism for laser welding

Abstract

The present invention relates to the field of laser welding technology. The present invention is a push-pull wire feeding mechanism for laser welding, characterized in that it comprises a welding wire reel, a pushing assembly, a pulling assembly, and a wire guide tube; the welding wire reel is inserted on a vertical rotating shaft B, and the bottom end of the rotating shaft B is driven by a motor B; the pushing assembly is provided with two groups and is respectively arranged on both sides of the wire outlet direction of the welding wire reel, the pushing group is composed of a motor C, a vertical rotating shaft C, and a horizontal pushing wheel, the motor C is drivingly connected to the bottom end of the rotating shaft C, and the top end of the rotating shaft C is fixedly connected to the pushing wheel; the pulling assembly is composed of a pair of mutually close and horizontal pulling wheels, two motors A and two rotating shafts A for driving the two pulling wheels to rotate in opposite directions respectively. The present invention sets an independent pushing assembly and pulling assembly, and the pushing wheel and the pulling wheel are both horizontal wheel bodies, and the friction force generated by the rotation process of the wheel body and the welding wire is used as the source of thrust and pulling force, so that the structure of the entire push-pull wire feeding mechanism is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, in particular to a push-pull wire feeding mechanism for laser welding. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. The laser melts the welding wire to achieve the welding function. The laser welding machine is mainly composed of a welding head, a motion system, and a wire feeding mechanism.

[0003] Among them, the wire feeding mechanism is an important auxiliary mechanism of the laser welding machine. Currently, there are three different wire feeding methods: push wire type, wire drawing type, and push-draw wire type. The push wire feeding mechanism has a simple structure, is lightweight, and is easy to operate and maintain, but the resistance to feeding the welding wire is large, and as the wire feeding tube becomes longer, the wire feeding stability becomes worse. The wire drawing mechanism is usually fixed on the welding gun or welding head, and has a more complex structure, but the wire feeding is relatively stable. For the push-pull wire feeding mechanism, wire pushing is the main power, and wire drawing is mainly for straightening the welding wire. Because its structure is too complicated, it is rarely used in practice. Therefore, for the wire feeding mechanism of the laser welding machine, there is an urgent need for a mechanism with a simple structure and stable wire feeding. Summary of the invention

[0004] In order to solve the above-mentioned prior art problems, the present invention provides a push-pull wire feeding mechanism for laser welding, which is characterized by comprising: a welding wire reel, a pushing component, a pulling component, a wire guide tube and a bearing platform for the bearing mechanism;

[0005] The welding wire reel is inserted on a vertical rotating shaft B, the bottom end of the rotating shaft B is driven by a motor B, the top of the rotating shaft B is provided with an external thread and a threaded cap is screwed on;

[0006] The pushing assembly is provided with two groups and is respectively arranged on both sides of the wire output direction of the welding wire reel. The pushing assembly is composed of a motor C, a vertical rotating shaft C, and a horizontal pushing wheel. The motor C is drivingly connected to the bottom end of the rotating shaft C, and the top end of the rotating shaft C is fixedly connected to the pushing wheel.

[0007] The pulling assembly is composed of a pair of pulling wheels lying close to each other, two motors A and two rotating shafts A for driving the two pulling wheels to rotate in opposite directions respectively;

[0008] The lead tube can be arranged in an inclined horizontal position below the welding head of the welding machine, the upper part of the lead tube is connected to the welding head of the welding machine through a connecting shaft, and a lead outlet is provided at the downwardly inclined end of the lead tube;

[0009] The welding wire on the welding wire reel passes around the two pushing wheels in turn, passes between the two pulling wheels, passes through the lead tube and then comes out from the wire outlet.

[0010] Further preferred solution: a coaxial annular pad is fixedly provided at the middle and lower part of the rotating shaft B, and the pad is connected to the shaft body of the rotating shaft B. The pad can support the welding wire reel and prevent the bottom end of the welding wire reel from directly contacting the motor B.

[0011] Further preferred solution: the two push wheels are arranged so that the welding wire is in an "S" shape after passing through the two push wheels. The arrangement of the two push wheels makes the welding wire in an "S" shape, and by changing the wire running direction of the welding wire, the frictional force between the push wheels and the welding wire can be fully exerted.

[0012] Further preferred solution: a horizontal reversing wheel is arranged between the second group of pushing components and the pulling components, and the bottom of the reversing wheel is movably connected to the top of a vertical support shaft. The reversing wheel is arranged between the pushing component and the pulling component, which can serve as the intersection point of the pushing force and the pulling force and play a certain balancing role.

[0013] Further preferred solution: a horizontal adjustment wheel is provided between the second pushing component and the reversing wheel, and the adjustment wheel is screwed on the top of a vertical sliding shaft; the bottom of the sliding shaft is slidably connected to a receiving plate with a slide groove, the longitudinal section of the slide groove is in a "cross" shape, a slider is fixedly provided at the bottom of the sliding shaft, and the slider is slidably connected to the horizontal groove section of the slide groove; a horizontally arranged spring is connected to the groove wall at one end of the slide groove, and the other end of the spring is connected to the slider. An adjustment wheel is provided between the pushing component and the reversing wheel, and the adjustment wheel can adjust the force difference between the pushing force and the pulling force through the cooperation of the spring, the slider, and the slide groove, so as to play a role in balancing and adjusting.

[0014] Further preferred solution: the welding wire passes through the second pushing wheel, the adjusting wheel and the reversing wheel in an "S" shape in sequence, and the spring is arranged at the inner corner side end of the acute angle formed by the welding wire around the adjusting wheel, and the natural length of the spring is the same as the length of the slideway. The natural length of the spring is the same as the length of the slideway, and the spring is arranged at the inner corner side end of the acute angle formed after the welding wire is around the adjusting wheel. The balance between the pushing force and the pulling force can be automatically adjusted by the elastic force of the spring, thereby maintaining the consistency of the wire feeding process.

[0015] Further preferred solution: the diameter of the pulling wheel decreases from the middle to the two ends, a circle of arc grooves is provided around the wheel body in the middle of the pulling wheel, and a rubber ring is provided around the arc groove. The setting of the arc groove can play a certain role in limiting and preventing the passing welding wire, and prevent the welding wire from being offset due to the pulling force generated on the welding wire when the two pulling wheels rotate in opposite directions; the setting of the rubber ring can not only use the elasticity of the rubber to adapt to welding wires of different wire diameters, but also use the rubber to increase the friction between the pulling wheel and the welding wire, thereby fully converting the friction into pulling force.

[0016] A further preferred solution is that a V-shaped groove is provided around the wheel body at the middle of the driving wheel, the adjusting wheel and the reversing wheel. The V-shaped groove can not only limit the position of the welding wire and prevent it from slipping, but also can adapt to welding wires of different wire diameters.

[0017] Further preferred solution: the center heights of the push wheel, the regulating wheel, the reversing wheel, and the pulling wheel are the same. The same center height allows the wire section from the push assembly to the pulling assembly to remain at the same level as much as possible, reducing the force interference caused by the wire walking tilt.

[0018] Further preferred solution: the lead tube is connected to a positioning tube away from the outlet end, the positioning tube is inclined and the inclination is the same as that of the lead tube, and the upper and lower walls of the positioning tube are both provided with a plurality of staggered limiting rollers, and the lower edge connection line of the upper limiting roller is parallel to the upper edge connection line of the lower limiting roller. The positioning tube is provided and a plurality of staggered limiting rollers are provided in the upper and lower parts of the positioning tube, so that the welding wire maintains a straight wire path before passing through the outlet.

[0019] Further preferred solution: the positioning tube is provided with a straightening ball at the end away from the lead tube, the straightening ball is hollow inside and has openings on both sides along the wire running direction, two rollers are arranged in alignment up and down inside the straightening ball, a through shaft is movably inserted in each of the two rollers, both ends of the through shaft are connected to a support frame, the support frame is connected to the inner wall of the straightening ball through a vertical extrusion spring away from the roller end, and a rolling groove surrounding the wheel body is provided in the middle of the roller body. A straightening ball is provided in front of the positioning tube, a pair of rollers arranged in alignment up and down are provided inside the straightening ball, and an extrusion spring is provided in combination, the extrusion force of the two extrusion springs acting on the two rollers can be used to straighten the welding wire passing through the rolling groove, so as to ensure the straightness of the welding wire during welding.

[0020] The beneficial effects of the present invention are embodied in:

[0021] First, independent pushing components and pulling components are provided, and both the pushing wheel and the pulling wheel are horizontal wheel bodies, and the friction force generated by the rotation of the wheel body and the welding wire is used as the source of thrust and pulling force, so that the structure of the entire push-pull wire feeding mechanism is simplified.

[0022] Secondly, by setting an adjusting wheel and a spring, the balance between the pushing force and the pulling force can be automatically adjusted through the elastic force of the spring, thereby maintaining the consistency of the wire feeding process and helping to improve the stability of the wire feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention and the cooperation of the welding machine;

[0025] Figure 3 It is a schematic diagram of the welding wire reel and its connection drive structure of the present invention;

[0026] Figure 4 It is a schematic diagram of a longitudinal section in the length direction of the receiving plate of the present invention;

[0027] Figure 5 It is a schematic longitudinal cross-sectional view of the receiving plate in the width direction of the present invention;

[0028] Figure 6 It is a schematic diagram of the pulling assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the driving wheel of the present invention;

[0030] Figure 8 A schematic diagram of an adjustment wheel of the present invention;

[0031] Fig. 9 It is a schematic diagram of the reversing wheel of the present invention;

[0032] Fig.10 The figure is a schematic diagram of the interior of the straightened ball of the present invention;

[0033] Fig.11 It is a schematic longitudinal cross-sectional view of the positioning tube and the lead tube of the present invention in the length direction.

[0034] Reference numerals: 1, bearing platform; 2, support shaft; 3, reversing wheel; 4, straightening ball; 401, extrusion spring; 402, roller; 403, rolling groove; 404, through-shaft; 405, bearing frame; 5, positioning tube; 501, limiting roller; 6, connecting shaft; 7, lead tube; 701, outlet head; 8, pulling assembly; 801, motor A; 802, rotating shaft A; 803, pulling wheel; 80 4. Arc groove; 805. Rubber ring; 9. Wire reel; 10. Threaded cap; 11. Rotating shaft B; 1101. Pad; 12. Motor B; 13. Pushing assembly; 1301. Motor C; 1302. Rotating shaft C; 1303. Pushing wheel; 14. Supporting plate; 1401. Slide groove; 15. Sliding shaft; 1501. Sliding block; 16. Adjusting wheel; 17. Spring; 18. V-shaped groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] Reference Figure 1 , Figure 2 , Figure 3 The welding wire reel 9 is inserted on a vertical rotating shaft B11, the bottom of the rotating shaft B11 is driven by a motor B12, the top of the rotating shaft B11 is provided with an external thread line and a threaded cap 10 is screwed on; the pushing assembly 13 is provided with two groups and is respectively arranged on both sides of the wire outlet direction of the welding wire reel 9, and the pushing assembly 13 is composed of a motor C1301, a vertical rotating shaft C1302, and a horizontal pushing wheel 1303. The motor C1301 and the bottom of the rotating shaft C1302 are connected to each other. The end is driven and connected, and the top of the rotating shaft C1302 is fixedly connected to the pushing wheel 1303; the pulling assembly 8 is composed of a pair of pulling wheels 803 close to each other and lying horizontally, two motors A801 ​​and two rotating shafts A802 for driving the two pulling wheels 803 to rotate in opposite directions respectively; the lead tube 7 can be arranged in an inclined horizontal position below the welding head of the welding machine, and the upper part of the lead tube 7 is connected to the welding head of the welding machine through a connecting shaft 6, and a wire outlet head 701 is provided at the downwardly inclined end of the lead tube 7.

[0038] The welding wire is guided in an "S"-shaped wire path around the two pushing wheels 1303 in turn, and passes between the two pulling wheels 803, and then passes through the lead tube 7 and out of the wire outlet 701; the motor B12 drives the rotating shaft B11 to rotate to drive the welding wire reel 9 to rotate and output the wire, and the pushing wheel 1303 rotates under the drive of the motor C1301 and the rotating shaft C1302, and then the friction between the pushing wheel 1303 and the welding wire is used to push the welding wire forward. The two pulling wheels 803 rotate in opposite directions under the drive of the two motors A801 ​​and the two rotating shafts A802, forming a forward squeezing force on the welding wire, and using the friction force to form a pulling force on the welding wire. In this way, the push and pull wire feeding can smoothly and steadily deliver the welding wire to the lead tube 7 and pass it through the wire outlet 701 to participate in welding.

[0039] Embodiment 2:

[0040] Reference Figure 1 , Figure 4 , Figure 5 A horizontal reversing wheel 3 is provided between the second pushing assembly 13 and the pulling assembly 8, and the bottom of the reversing wheel 3 is movably screwed to the top of a vertical support shaft 2; a horizontal adjusting wheel 16 is provided between the second pushing assembly 13 and the reversing wheel 3, and the adjusting wheel 16 is screwed to the top of a vertical sliding shaft 15; the bottom of the sliding shaft 15 is slidably connected to a receiving plate 14 with a slide groove 1401, and the longitudinal section of the slide groove 1401 is in the shape of a "cross", and a slider 1501 is fixedly provided at the lower part of the sliding shaft 15, and the slider 1501 is slidably connected to the horizontal groove section of the slide groove 1401; a horizontally arranged spring 17 is connected to the groove wall at one end of the slide groove 1401, and the other end of the spring 17 is connected to the slider 1501; the spring 17 is arranged on the inner angle side end of the acute angle formed by the welding wire around the adjusting wheel 16, and the natural length of the spring 17 is the same as the length of the slide groove 1401.

[0041] The setting of the reversing wheel 3 can serve as the intersection point of the pushing force and the pulling force, and play a certain balancing role; when the pulling force is greater than the pushing force, the adjusting wheel 16 is squeezed by the welding wire in the direction of the spring 17, and the spring 17 contracts after being squeezed; when the pulling force is less than the pushing force, the squeezing force of the welding wire in the direction of the spring 17 on the adjusting wheel 16 becomes smaller, and the spring 17 relaxes at this time. Through the cooperation of the spring 17, the slider 1501, and the slide groove 1401, the force difference between the pushing force and the pulling force can be adjusted, thereby playing a balancing and regulating role.

[0042] Embodiment 3:

[0043] Reference Figure 6 , Figure 7 , Figure 8 , Fig. 9 The center heights of the driving wheel 1303, the adjusting wheel 16, the reversing wheel 3, and the pulling wheel 803 are the same; a V-shaped groove 18 is arranged around the wheel body in the middle of the driving wheel 1303, the adjusting wheel 16, and the reversing wheel 3; the wheel diameter of the pulling wheel 803 decreases from the middle to both ends, and a circular arc groove 804 is arranged around the wheel body in the middle of the pulling wheel 803, and a rubber ring 805 is arranged around the circular arc groove 804.

[0044] The center heights are the same, so that the wire section from the pushing component to the pulling component can be kept at the same level as much as possible; the setting of the V-shaped groove 18 can limit the welding wire and prevent it from slipping; the setting of the arc groove 804 can limit the passing welding wire to a certain extent and prevent it from slipping, thereby preventing the welding wire from being deviated due to the pulling force generated on the welding wire when the two pulling wheels 803 rotate in opposite directions; the setting of the rubber ring 805 can utilize the elasticity of the rubber to adapt to welding wires of different wire diameters, and can also utilize the rubber to increase the friction between the pulling wheel and the welding wire, thereby fully converting the friction into pulling force.

[0045] Embodiment 4:

[0046] Reference Fig.10 , Fig.11A positioning tube 5 is connected to the end of the lead tube 7 away from the wire outlet head 701. The positioning tube 5 is inclined and the inclination is the same as that of the lead tube 7. The upper and lower walls of the positioning tube 5 are provided with a plurality of staggered limiting rollers 501. The lower edge connection line of the upper limiting roller 501 is parallel to the upper edge connection line of the lower limiting roller 501. The wire path of the welding wire is between the upper and lower limiting rollers 501, so that the welding wire maintains a straight wire path before passing through the wire outlet head 701; a straightening ball 4 is provided at the end of the positioning tube 5 away from the lead tube 7. The straightening ball 4 is hollow inside and has openings on both sides along the wire running direction of the welding wire. Two rollers 402 aligned up and down are arranged in the straightening ball 4, and a through shaft 404 is movably arranged in each of the two rollers 402. Both ends of the through shaft 404 are connected to a supporting frame 405. The supporting frame 405 is connected to the inner wall of the straightening ball 4 through a vertical extrusion spring 401 at the end away from the roller 402. A rolling groove 403 surrounding the wheel body is provided in the middle of the roller 402; when the welding wire passes through the upper and lower rollers 402 from the rolling groove 403, the welding wire can be straightened under the extrusion force of the extrusion spring 401, thereby improving the straightness of the welding wire when it passes through the wire end.

[0047] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0048] In the description of the embodiments of the present invention, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0051] In the description of the embodiments of the present invention, it is to be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0052] In the description of the embodiments of the present invention, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A push-pull wire feeding mechanism for laser welding, characterized in that: include: A welding wire reel (9), a pushing assembly (13), a pulling assembly (8), a wire guide tube (7), and a bearing platform (1) for the bearing mechanism; The welding wire reel (9) is inserted on a vertical rotating shaft B (11), the bottom end of the rotating shaft B (11) is driven by a motor B (12), and the top of the rotating shaft B (11) is provided with an external thread and is screwed with a threaded cap (10); The pushing assembly (13) is provided with two groups and is respectively arranged on both sides of the wire output direction of the welding wire reel (9), the pushing assembly (13) is composed of a motor C (1301), a vertical rotating shaft C (1302), and a horizontal pushing wheel (1303), the motor C (1301) is drivingly connected to the bottom end of the rotating shaft C (1302), and the top end of the rotating shaft C (1302) is fixedly connected to the pushing wheel (1303); The pulling assembly (8) is composed of a pair of pulling wheels (803) lying close to each other, two motors A (801) for driving the two pulling wheels (803) to rotate in opposite directions, and two rotating shafts A (802); The lead tube (7) is arranged in an inclined horizontal position below the welding head of the welding machine. The upper part of the lead tube (7) is connected to the welding head of the welding machine via a connecting shaft (6). A lead outlet (701) is provided at the downwardly inclined end of the lead tube (7). A positioning tube (5) is connected to the end of the lead tube (7) away from the lead outlet (701). The positioning tube (5) is inclined and has the same inclination as the lead tube (7). The upper and lower walls of the positioning tube (5) are provided with a plurality of staggered limiting rollers (501). The lower edge connection line of the upper limiting roller (501) is parallel to the upper edge connection line of the lower limiting roller (501). The end of the positioning tube (5) away from the lead tube (7) is provided with a straightening ball (4). The straightening ball (4) is hollow inside and has openings on both sides along the wire running direction. Two rollers (402) are arranged in an upper and lower alignment in the straightening ball (4). A through shaft (404) is movably inserted in each of the two rollers (402). Both ends of the through shaft (404) are connected to a supporting frame (405). The end of the supporting frame (405) away from the roller (402) is connected to the inner wall of the straightening ball (4) through a vertical extrusion spring (401). A rolling groove (403) surrounding the wheel body is provided in the middle of the wheel body of the roller (402); The welding wire on the welding wire reel (9) passes around the two pushing wheels (1303) in sequence, passes through between the two pulling wheels (803), passes through the lead tube (7), and then passes out from the wire outlet (701).

2. A push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: A coaxial annular pad (1101) is fixedly provided at the lower middle portion of the rotating shaft B (11), and the pad (1101) is annularly connected to the shaft body of the rotating shaft B (11).

3. A push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: The positions of the two pushing wheels (1303) are arranged so that the welding wire forms an "S" shape after passing around the two pushing wheels (1303).

4. A push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: A horizontal reversing wheel (3) is provided between the second group of pushing components (13) and the pulling components (8), and the bottom of the reversing wheel (3) is movably screwed to the top of a vertical support shaft (2).

5. The push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: A horizontal adjusting wheel (16) is provided between the second pushing assembly (13) and the reversing wheel (3), and the adjusting wheel (16) is screwed to the top of a vertical sliding shaft (15); the bottom of the sliding shaft (15) is slidably connected to a receiving plate (14) provided with a sliding groove (1401), and the longitudinal section of the sliding groove (1401) is in the shape of a "cross", and a sliding block (1501) is fixedly provided at the lower part of the sliding shaft (15), and the sliding block (1501) is slidably connected to the horizontal groove section of the sliding groove (1401); a horizontally arranged spring (17) is connected to the groove wall at one end of the sliding groove (1401), and the other end of the spring (17) is connected to the sliding block (1501).

6. A push-pull wire feeding mechanism for laser welding according to claim 5, characterized in that: The welding wire is in an "S" shape and passes through the second pushing wheel (1303), the adjusting wheel (16), and the reversing wheel (3) in sequence. The spring (17) is arranged at the inner corner side end of the acute angle formed by the welding wire around the adjusting wheel (16), and the natural length of the spring (17) is the same as the length of the slide groove (1401).

7. A push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: The diameter of the pulling wheel (803) decreases from the middle to the two ends. A circular arc groove (804) is provided around the wheel body in the middle of the pulling wheel (803). A rubber ring (805) is provided around the circular arc groove (804).

8. The push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: A V-shaped groove (18) is formed around the wheel bodies of the driving wheel (1303), the regulating wheel (16) and the reversing wheel (3).

9. A push-pull wire feeding mechanism for laser welding according to claim 1, characterized in that: The heights of the centers of the driving wheel (1303), the regulating wheel (16), the reversing wheel (3), and the pulling wheel (803) are all the same.

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