Laser welding jig and laser welding equipment

Abstract

The utility model provides a laser welding jig and laser welding equipment, and the laser welding jig comprises a lower jig plate which is used for limiting a shell; the upper jig plate is arranged on the upper side of the lower jig plate and can be close to or away from the lower jig plate in the longitudinal direction, a rotating ring is rotationally installed on the upper jig plate, spokes are arranged on the inner side wall of the rotating ring, a rotating shaft is rotationally installed on the spokes, the rotating shaft and the rotating ring are coaxial, a pressing plate is arranged at the end, facing the lower jig plate, of the rotating shaft, and the shell is located between the lower jig plate and the pressing plate; and the first driving piece is arranged on the upper jig plate and used for driving the rotating ring to rotate, so that the spokes rotate by a certain angle along with the rotating ring. Continuous welding of the welding seam can be achieved by rotating the rotating ring, the shell does not need to be clamped again, the path does not need to be planned again when the galvanometer for projecting the laser beams executes two times of welding, the welding duration of the shell is effectively shortened, the welding efficiency is improved, and the labor cost is reduced.

Description

Laser welding fixtures and laser welding equipment Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a laser welding fixture and laser welding equipment. Background Technology

[0002] Figure 10 shows a housing comprising a bottom shell and a top cover on top of the bottom shell, the top cover being used to seal the bottom shell. To improve the sealing performance of the top cover over the bottom shell, the top cover and bottom shell are laser-welded, with the weld seam continuous and extending along the edge of the top cover. During welding, the top cover and bottom shell need to be fixed with clamps. However, traditional clamps inevitably interfere with the continuous path of laser welding. Therefore, to achieve full welding of the top cover edge, at least two laser welding operations are required for the housing. The first welding operation involves welding areas of the top cover that are not obstructed or interfered with by the clamps; the second welding operation uses another clamp to hold and fix the housing, and fills in the areas missed in the first welding operation. This increases the welding time, reduces welding efficiency, and increases labor costs. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the first objective of this utility model is to provide a laser welding fixture that effectively reduces the welding time of the shell, improves the welding efficiency, and reduces labor costs.

[0004] The second objective of this invention is to provide a laser welding device with higher welding efficiency.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A laser welding fixture includes: a lower fixture plate for limiting a housing; an upper fixture plate disposed on the upper side of the lower fixture plate and capable of moving longitudinally towards or away from the lower fixture plate; a rotating ring rotatably mounted on the upper fixture plate; spokes disposed on the inner sidewall of the rotating ring; a rotating shaft rotatably mounted on the spokes; the rotating shaft being coaxial with the rotating ring; a clamping plate disposed at the end of the rotating shaft facing the lower fixture plate; and the housing being positioned between the lower fixture plate and the clamping plate; and a first driving member disposed on the upper fixture plate for driving the rotating ring to rotate, so that the spokes follow the rotating ring to rotate a certain angle. This laser welding fixture enables continuous welding of the weld seam by rotating the rotating ring, eliminating the need to re-clamp the housing, and the galvanometer projecting the laser beam does not need to replan its path when performing two welding operations, effectively reducing the welding time of the housing, improving welding efficiency, and reducing labor costs.

[0007] According to a preferred embodiment, the clamping plate has a first working plane on one side facing the lower fixture plate, and a first negative pressure hole is provided on the first working plane.

[0008] According to a preferred embodiment, a second working plane is provided on one side of the lower fixture plate facing the upper fixture plate, and a second negative pressure hole is provided on the second working plane.

[0009] According to a preferred embodiment, a first limiting plate and a second limiting plate are disposed on the lower fixture plate, and both the first limiting plate and the second limiting plate are perpendicular to the second working plane; the first limiting plate and the second limiting plate are perpendicular, and the housing is placed on the second working plane and abuts against the first limiting plate and the second limiting plate.

[0010] According to a preferred embodiment, the circumferential side of the rotating shaft is provided with a first reset surface, and a reset block is adjustablely mounted on the spoke. The reset block is provided with a second reset surface, which can abut against or detach from the first reset surface. When the rotating ring is in a reset state, the second reset surface abuts against the first reset surface. When the rotating ring is in a non-reset state, the second reset surface detaches from the first reset surface.

[0011] According to a preferred embodiment, the reset block is slidably connected to the spoke.

[0012] According to a preferred embodiment, a fixing block is disposed on the rotating ring, and a first reset spring is disposed between the fixing block and the reset block. The first reset spring acts on the reset block to give the reset block a tendency to move toward the rotating shaft. A track block is mounted on the upper fixture plate, and a track surface is disposed on the track block. A roller is disposed on the reset block, and the roller is in rolling connection with the track surface. When the rotating ring rotates relative to the upper fixture plate, the roller moves along the track surface to make the reset block slide relative to the spoke.

[0013] According to a preferred embodiment, the first reset surface is a plane and is perpendicular to the horizontal plane; the second reset surface includes two cylindrical surfaces that protrude toward the first reset surface, and the generatrix of the cylindrical surfaces is perpendicular to the horizontal plane; when the rotating ring is in the reset state, both cylindrical surfaces abut against the first reset surface.

[0014] According to a preferred embodiment, the second reset surface includes two cylindrical surfaces that protrude toward the first reset surface; the first reset surface is a cylindrical surface that is radially recessed toward the rotating shaft, and the first reset surface is adapted to the second reset surface; when the rotating ring is in the reset state, the reset block is at least partially engaged with the rotating shaft.

[0015] A laser welding apparatus includes a machine base, a galvanometer, and the aforementioned laser welding fixture, both of which are mounted on the machine base. This laser welding apparatus has higher welding efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a three-dimensional structural schematic diagram of the laser welding fixture provided in an embodiment of the present invention;

[0018] Figure 2 is a top view of the laser welding fixture provided in an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of the first three-dimensional structure after the upper jig plate and the rotating ring are assembled according to the embodiment of this utility model.

[0020] Figure 4 is a schematic diagram of the second three-dimensional structure after the upper jig plate and the rotating ring are assembled according to the embodiment of this utility model.

[0021] Figure 5 is an exploded view of the assembly structure of the rotating ring and reset block, rotating shaft and clamping plate provided in the embodiment of this utility model.

[0022] Figure 6 is a three-dimensional structural schematic diagram of the lower guide portion provided in an embodiment of the present utility model;

[0023] Figure 7 is a top view of the rotating ring in the reset state according to an embodiment of the present invention;

[0024] Figure 8 is a top view of the rotating ring in a non-reset state according to an embodiment of the present invention.

[0025] Figure 9 is a schematic diagram of the assembly structure of the lower jig plate and the shell provided in an embodiment of the present utility model;

[0026] Figure 10 is a three-dimensional structural diagram of a certain model of housing in an embodiment of this utility model;

[0027] Figure 11 is a schematic diagram of the operation of the laser beam in conjunction with the laser welding fixture provided in this embodiment.

[0028] Icons: 1. Lower jig plate; 11. Second working plane; 12. First limiting plate; 13. Second limiting plate; 2. Upper jig plate; 21. Cylinder bracket; 22. Drive cylinder; 23. Drive plate; 231. Drive slide groove; 24. Track block; 241. Track surface; 25. Second return spring; 3. Rotary ring; 31. Spoke; 311. Clearance groove; 32. Return block; 321. Upper guide part; 3211. Roller; 322. Connecting... 323, Lower guide part; 3231, Second reset surface; 33, Fixing block; 34, First reset spring; 35, Follower wheel; 41, Base plate; 42, Longitudinal plate; 421, Rodless cylinder; 5, Rotating shaft; 50, First reset surface; 501, Reset step; 51, Pressing plate; 511, First working plane; 5111, First negative pressure hole; a, Housing; a1, Top cover; a11, Weld; a2, Bottom shell; A, Laser beam. Detailed Implementation

[0029] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0032] Referring to Figures 1 to 11, a laser welding fixture includes an upper fixture plate 2, a lower fixture plate 1, and a first driving member, wherein: the lower fixture plate 1 is used to limit the housing a; the upper fixture plate 2 is disposed on the upper side of the lower fixture plate 1 and can move closer to or away from the lower fixture plate 1 longitudinally; a rotating ring 3 is rotatably mounted on the upper fixture plate 2; spokes 31 are disposed on the inner side wall of the rotating ring 3; a rotating shaft 5 is rotatably mounted on the spokes 31; the rotating shaft 5 is coaxial with the rotating ring 3; a clamping plate 51 is disposed at the end of the rotating shaft 5 facing the lower fixture plate 1; and the housing a is located between the lower fixture plate 1 and the clamping plate 51; the first driving member is disposed on the upper fixture plate 2 and is used to drive the rotating ring 3 to rotate so that the spokes 31 follow the rotating ring 3 to rotate a certain angle.

[0033] As shown in Figure 1, the laser welding fixture also includes a base plate 41 and a longitudinal plate 42. The base plate 41 is horizontally positioned, and the longitudinal plate 42 is mounted on the base plate 41 and perpendicular to it. The lower fixture plate 1 is mounted on the base plate 41, and the upper fixture plate 2 is slidably mounted on the longitudinal plate 42 via a slide rail slider assembly, so that the upper fixture plate 2 can move longitudinally relative to the lower fixture plate 1. In this embodiment, the upper fixture plate 2 has a through-hole, and the rotating ring 3 is rotatably mounted in the through-hole via a bearing.

[0034] As shown in Figures 5, 6, and 7, the rotating ring 3 is a circular ring. Optionally, there is one spoke 31, which is disposed on the inner wall of the rotating ring 3. The spoke 31 coincides with one diameter of the rotating ring 3. The rotating shaft 5 is rotatably mounted at the center position of the spoke 31 via a bearing. The clamping plate 51 cooperates with the lower fixture plate 1 to position the housing a. The weld a11 of the housing a is exposed longitudinally upward through the internal space of the rotating ring 3. That is, the laser beam A passes through the internal space of the rotating ring 3 to reach the weld a11 position for welding. It can be understood that the clamping plate 51 is located inside the weld a11, and the spoke 31 area interferes with the continuity of the weld a11. In use, the housing a is positioned by the clamping plate and the lower fixture plate 1. At this time, the rotating ring 3 is in the reset state. The area of ​​the weld a11 that is not interfered with by the spoke 31 is defined as the first weld segment, and the area of ​​the weld a11 that is interfered with by the spoke 31 is defined as the second weld segment.

[0035] As shown in Figure 7, when the rotating ring 3 is in the reset state, the welding of the first weld segment is achieved; as shown in Figure 8, when the rotating ring 3 is in the non-reset state, the welding of the second weld segment is achieved. Specifically, after the welding of the first weld segment is completed, the first driving member drives the rotating ring 3 to rotate, and the spokes 31 rotate synchronously with the rotating ring 3 to expose the second weld segment. During this process, the rotating ring 3 rotates relative to the upper fixture plate 2, and the clamping plate 51, i.e., the rotating shaft 5, remains stationary relative to the upper fixture plate 2 under the action of the friction force of the housing a. Therefore, the second weld segment can be fully exposed during the rotation of the rotating ring 3 while maintaining good positioning of the housing a. This laser welding fixture achieves continuous welding of weld seam a11 by rotating the rotating ring 3 (here, continuous welding refers to the connection of the trajectories of the first and second weld segments to form a continuous closed-loop weld seam a11). It eliminates the need to re-clamp the shell a, and the galvanometer (not shown in the figure) projecting the laser beam A does not need to replan its path when performing two welding operations. It simply completes the welding of the first and second weld segments according to the preset weld seam a11 path, effectively reducing the welding time of the shell a, improving welding efficiency, and lowering labor costs. It should be noted that the rotation of the rotating ring 3 aims to expose the second weld segment; therefore, the rotation direction and angle of the rotating ring 3 are both designed to achieve this purpose, meaning that the second weld segment should be fully exposed after the rotating ring 3 rotates.

[0036] As shown in Figures 1 and 2, an adjustment groove (not shown in the figure) is provided through the longitudinal plate 42. A rodless cylinder 421 is provided on the side of the longitudinal plate 42 away from the upper fixture plate 2. The upper fixture plate 2 is connected to the rodless cylinder 421 through the adjustment groove at least partially and is driven by the rodless cylinder 421 to move longitudinally.

[0037] As shown in Figure 3, the first driving component includes a cylinder bracket 21, a driving plate 23, and a driving cylinder 22. The cylinder bracket 21 is fixedly installed on the upper fixture plate 2. The driving plate 23 is slidably installed on the upper fixture plate 2 via a slide rail slider assembly. The driving cylinder 22 is installed on the cylinder bracket 21 and is used to drive the driving plate 23 to move. The direction of movement of the driving plate 23 is parallel to the tangential direction of the rotating ring 3. A follower wheel 35 is configured on the rotating ring 3. A driving groove 231 is opened on the driving plate 23. The follower wheel 35 is assembled in the driving groove 231. With this configuration, the linear motion of the driving plate 23 can be converted into the circular motion of the rotating ring 3 to realize the rotation of the ring.

[0038] As shown in Figure 4, preferably, the side of the clamping plate 51 facing the lower fixture plate 1 is provided with a first working plane 511, and a first negative pressure hole 5111 is provided on the first working plane 511. In use, the top cover a1 is attached to the first working plane 511, and the first negative pressure hole 5111 generates negative pressure to adsorb and fix the top cover a1.

[0039] In this embodiment, the rotating shaft 5 is hollow and has an air passage. The upper end of the rotating shaft 5 is connected to a negative pressure source, and the lower end is connected to a pressure plate 51. In this embodiment, the negative pressure plate is hollow and has a first negative pressure chamber. The first negative pressure hole 5111 is connected to the first negative pressure chamber, and the lower end of the rotating shaft 5 is connected to the first negative pressure chamber.

[0040] As shown in Figures 1 and 9, a second working plane 11 is disposed on the side of the lower fixture plate 1 facing the upper fixture plate 2, and a second negative pressure hole (not shown in the figures) is disposed on the second working plane 11. In this embodiment, the lower fixture plate 1 is hollow and has a second negative pressure cavity, the second negative pressure hole is connected to the second negative pressure cavity, and the second negative pressure cavity is connected to a negative pressure source. A negative pressure is generated at the second negative pressure hole to adsorb and fix the bottom shell a2.

[0041] Furthermore, a first limiting plate 12 and a second limiting plate 13 are disposed on the lower fixture plate 1, both of which are perpendicular to the second working plane 11. With the first limiting plate 12 and the second limiting plate 13 perpendicular, the housing a is placed on the second working plane 11 and abuts against the first limiting plate 12 and the second limiting plate 13. In this embodiment, the first limiting plate 12 and the second limiting plate 13 are used to cooperate with the second working plane 11 to position the bottom shell a2, thereby ensuring the clamping accuracy of the bottom shell a2, i.e., the housing a.

[0042] In use, the bottom shell a2 is first positioned on the lower fixture plate 1 by the first limiting plate 12, the second limiting plate 13, and the second working plane 11; then the top cover a1 is transported to the clamping plate 51 by the robot arm, so that it fits and is fixed to the first working plane 511; then the upper fixture plate 2 moves downward along the longitudinal direction so that the top cover a1 is assembled onto the bottom shell a2, completing the clamping of the shell a on the fixture; then the shell a is welded by laser, that is, the welding steps of the first welding segment and the second welding segment mentioned above are performed to complete the welding of the shell a; finally, the rotating ring 3 is reset to the reset state, the upper fixture plate 2 moves away from the lower fixture plate 1 along the longitudinal direction, the shell a is unloaded and the next shell a is welded, and so on.

[0043] A first reset surface 50 is disposed on the circumferential side of the rotating shaft 5. A reset block 32 is adjustablely mounted on the spoke 31, and a second reset surface 3231 is disposed on the reset block 32. The second reset surface 3231 can abut against or disengage from the first reset surface 50. When the rotating ring 3 is in the reset state, the second reset surface 3231 abuts against the first reset surface 50; when the rotating ring 3 is in the non-reset state, the second reset surface 3231 disengages from the first reset surface 50. As shown in Figure 5, in this embodiment, the rotating shaft 5 is a stepped shaft, and its lower end, that is, the end near the pressure plate 51, has a reset step 501. The first reset surface 50 is disposed on the side of the reset step 501. Optionally, the first reset surface 50 is a plane, perpendicular to the horizontal plane. The second reset surface 3231 includes two cylindrical surfaces, which protrude toward the first reset surface 50. The generatrix of the cylindrical surfaces is perpendicular to the horizontal plane. When the rotating ring 3 is in the reset state, the second reset surface 3231 abuts against the first reset surface 50. At this time, both cylindrical surfaces are in line contact with the first reset surface 50, and the contact line is parallel to the generatrix of the cylindrical surface. In this way, when the rotating ring 3 is in the reset state, the rotating shaft 5, i.e. the pressure plate 51, can be in a stable circumferential position by the second reset surface 3231 abutting against the first reset surface 50. This ensures the accuracy of fixing the top cover a1 in the next welding cycle, thereby ensuring the assembly accuracy of the top cover a1 and the bottom shell a2, and thus ensuring the welding accuracy of the shell a.

[0044] In some embodiments, the first reset surface 50 can be a cylindrical surface adapted to the second reset surface 3231, that is, the first reset surface 50 is a cylindrical surface that is radially recessed towards the rotating shaft 5. With this configuration, when the second reset surface 3231 abuts against the first reset surface 50, that is, when the rotating ring 3 is in the reset state, the reset block 32 is at least partially engaged with the rotating shaft 5. This can limit the rotating shaft 5 in the circumferential direction while also ensuring the perpendicularity of the rotating shaft 5 to a certain extent, thereby ensuring that the pressure plate 51 does not tilt to a certain extent, and thus ensuring the assembly accuracy of the top cover a1.

[0045] In other embodiments, both the first reset surface 50 and the second reset surface 3231 can be spherical. Corresponding to the cylindrical surface, the second reset surface 3231 protrudes towards the first reset surface 50, and the first reset surface 50 is recessed radially inward along the axis of rotation 5.

[0046] In some embodiments, the reset block 32 is slidably connected to the spoke 31. In some embodiments, the reset block 32 is slidably connected to the spoke 31 via a slide rail slider assembly, and can be driven by a driving component such as a cylinder or an electric actuator to move the reset block 32 so that the second reset surface 3231 abuts against or disengages from the first reset surface 50.

[0047] In this embodiment, optionally, the reset block 32 includes an upper guide portion 321, a connecting portion 322, and a lower guide portion 323. The upper guide portion 321 and the lower guide portion 323 are connected by the connecting portion 322. A clearance groove 311 is provided through the spoke 31. The upper guide portion 321 is slidably mounted on the spoke 31 via a slide rail slider assembly. The connecting portion 322 passes through the clearance groove 311. The lower guide portion 323 is located on the lower side of the spoke 31. The second reset surface 3231 is disposed on the lower guide portion 323. With this configuration, the reset block 32 and the spoke 31 can be highly integrated to reduce the projected area of ​​the combined structure of the reset block 32 and the spoke 31 on the top cover a1. This can shorten the size of the second welding segment, thereby reducing the effective rotation angle of the swivel 3 (the minimum angle of rotation required to fully expose the second welding segment), which is beneficial to improving work efficiency.

[0048] As shown in Figures 5, 7, and 8, in this embodiment, a fixing block 33 is arranged on the rotating ring 3, and a first reset spring 34 is arranged between the fixing block 33 and the reset block 32. The first reset spring 34 acts on the reset block 32 so that the reset block 32 has a tendency to move toward the rotating shaft 5. A track block 24 is assembled on the upper fixture plate 2, and a track surface 241 is arranged on the track block 24. A roller 3211 is arranged on the reset block 32, and the roller 3211 is rolledly connected to the track surface 241. When the rotating ring 3 rotates relative to the upper fixture plate 2, the roller 3211 moves along the track surface 241 so that the reset block 32 slides relative to the spoke 31. In this embodiment, roller 3211 is rotatably mounted on upper guide portion 321, and track surface 241 is a cam surface adapted to roller 3211, used to cooperate with roller 3211 to drive reset block 32 to slide relative to spoke 31, so that second reset surface 3231 can disengage from first reset surface 50 during the rotation of ring 3 from reset state to non-reset state. This allows for synchronous rotation of ring 3 and sliding of reset block 32, improving motion accuracy. Furthermore, the rotation of ring 3 and sliding of reset block 32 are driven by the same power source, saving costs and reducing fixture size.

[0049] Optionally, both the aforementioned follower wheel 35 and roller 3211 can be cam followers.

[0050] As shown in Figures 7 and 8, the first reset spring 34 is always in a compressed state. When the rotating ring 3 is in a non-reset state, the first reset spring 34 is further compressed, which is beneficial for the reset block 32 to quickly reset when the rotating ring 3 rotates to the reset state, so that the second reset surface 3231 can act on the first reset surface 50 in time.

[0051] As shown in Figures 1 to 4, a second return spring 25 is provided between the rotating ring 3 and the upper fixture plate 2. The second return spring 25 acts on the rotating ring 3 to give it a tendency to remain in the reset state. Here, the second return spring 25 facilitates the process of the rotating ring 3 changing from the non-reset state to the reset state.

[0052] Figure 11 shows a schematic diagram of the operation of laser beam A in conjunction with the laser welding fixture of this embodiment.

[0053] In some embodiments, housing a can be used for the battery.

[0054] This embodiment also provides a laser welding apparatus, including a machine base (not shown in the figure), a galvanometer (not shown in the figure), and the aforementioned laser welding fixture, both of which are mounted on the machine base. Based on the laser welding fixture, this laser welding apparatus has higher welding efficiency.

[0055] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A laser welding fixture, characterized in that, include: A lower fixture plate is used to limit the housing; an upper fixture plate is disposed on the upper side of the lower fixture plate and can move closer to or further away from the lower fixture plate in the longitudinal direction; a rotating ring is rotatably mounted on the upper fixture plate; spokes are arranged on the inner sidewall of the rotating ring; a rotating shaft is rotatably mounted on the spokes; the rotating shaft is coaxial with the rotating ring; a clamping plate is arranged at the end of the rotating shaft facing the lower fixture plate; and the housing is located between the lower fixture plate and the clamping plate. And a first driving component, disposed on the upper fixture plate, for driving the rotating ring to rotate so that the spokes follow the rotating ring to rotate a certain angle.

2. The laser welding fixture according to claim 1, characterized in that, The clamping plate has a first working plane on one side facing the lower fixture plate, and a first negative pressure hole is provided on the first working plane.

3. The laser welding fixture according to claim 1, characterized in that, The lower fixture plate has a second working plane on one side facing the upper fixture plate, and a second negative pressure hole is provided on the second working plane.

4. The laser welding fixture according to claim 3, characterized in that, The lower fixture plate is provided with a first limiting plate and a second limiting plate, both of which are perpendicular to the second working plane; the first limiting plate and the second limiting plate are perpendicular, and the housing is placed on the second working plane and abuts against the first limiting plate and the second limiting plate.

5. The laser welding fixture according to claim 1, characterized in that, The circumferential side of the rotating shaft is provided with a first reset surface, and a reset block is adjustablely mounted on the spoke. The reset block is provided with a second reset surface, which can abut against or detach from the first reset surface. When the rotating ring is in the reset state, the second reset surface abuts against the first reset surface. When the rotating ring is in the non-reset state, the second reset surface detaches from the first reset surface.

6. The laser welding fixture according to claim 5, characterized in that, The reset block is slidably connected to the spoke.

7. The laser welding fixture according to claim 6, characterized in that, A fixed block is disposed on the rotating ring, and a first return spring is disposed between the fixed block and the reset block. The first return spring acts on the reset block so that the reset block tends to move toward the rotating shaft. A track block is mounted on the upper fixture plate, and a track surface is disposed on the track block. A roller is disposed on the reset block, and the roller is in rolling connection with the track surface. When the rotating ring rotates relative to the upper fixture plate, the roller moves along the track surface so that the reset block slides relative to the spoke.

8. The laser welding fixture according to claim 5, characterized in that, The first reset surface is a plane and is perpendicular to the horizontal plane; the second reset surface includes two cylindrical surfaces that protrude toward the first reset surface, and the generatrix of the cylindrical surfaces is perpendicular to the horizontal plane; when the rotating ring is in the reset state, both cylindrical surfaces abut against the first reset surface.

9. The laser welding fixture according to claim 5, characterized in that, The second reset surface includes two cylindrical surfaces that protrude toward the first reset surface; the first reset surface is a cylindrical surface that is radially recessed toward the rotating shaft, and the first reset surface is adapted to the second reset surface; when the rotating ring is in the reset state, the reset block is at least partially engaged with the rotating shaft.

10. A laser welding device, characterized in that, It includes a machine base, a galvanometer, and a laser welding fixture as described in any one of claims 1-9, wherein the galvanometer and the laser welding fixture are both mounted on the machine base.

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