A battery box welding equipment

Abstract

The application relates to the technical field of battery box welding, in particular to a battery box welding device which comprises an outer clamping assembly for fixing the battery box body, a turnover assembly for driving the battery box body to turn over, a welding assembly for welding the battery box body, and a feeding assembly for feeding the battery box bottom plate. In the application, the support member clamps from the inside of the battery box body, and the clamping plate clamps the outside of the battery box body. Under the action of the support member, the clamping plate can avoid deforming the battery box body, thereby realizing overall clamping of the battery box body, fixing the battery box body, avoiding shaking of the battery box body during welding, influencing the welding of the battery box body, and avoiding the clamping plate damaging the battery box body under the action of the support member.

Description

Technical Field

[0001] This invention relates to the field of battery box welding technology, and more specifically to a battery box welding device. Background Technology

[0002] The basic function of a battery box is to house and protect the battery pack. Its structure must ensure maximum storage space and sufficient strength to protect the batteries from impacts. In existing technology, the welding process for battery boxes generally involves bending the sheet metal three times using a bending machine to form the main body of the battery box. Then, the two ends of the main body are welded together, the base plate is welded to one end of the battery box, and finally, the battery box cover is installed at the other end of the main body to complete the processing of the battery box.

[0003] Patent application CN202321805502.2 discloses a welding machine for battery box production, including a lower main shell. An upper main shell is bolted to the top of the lower main shell. Four sets of support columns are fixedly connected to the top of the upper main shell. A motor is fixedly installed on the inner wall of each set of support columns. A fixed seat is fixedly connected between every two sets of support columns, and a transmission rod is rotatably connected to the inner wall of each fixed seat. One end of each transmission rod is fixedly connected to the output end of the motor. A second fixed seat is threaded to the outer wall of each transmission rod, and the second fixed seat can move within a channel opened in the inner wall of the first fixed seat. This allows a telescopic clamping plate to unfold according to the movement of the clamping plate body, enabling the clamping plate body and the telescopic clamping plate to clamp battery boxes of different sizes, effectively reducing the time spent on manual clamping.

[0004] The aforementioned application uses an automatic clamping method to clamp battery boxes of different sizes, reducing the time spent on manual clamping. However, the battery box cannot rotate after clamping, resulting in a single welding angle. When the battery box is thin, excessive clamping force can easily cause deformation of the battery box.

[0005] Application CN202311716538.8 relates to the field of battery box welding fixtures and discloses a welding fixture for a new energy forklift battery box. In this invention, two support boxes are fixedly mounted on both sides of the upper surface of the base. Two turntables are mounted on opposite sides of the two support boxes. A tilting frame is connected to the opposite surfaces of the two turntables. A fixing block is located in the middle of the tilting frame. An output shaft is connected to the other side of the turntables, and the other end of the output shaft is connected to the output end of a tilting motor, which is located inside the support boxes. By setting up the tilting assembly, workers can easily perform multi-angle welding on the battery box, improving the convenience of the welding work. Activating the tilting motor drives the output shaft and turntables to tilt, and the tilting frame connected to the turntables drives the battery box to tilt. The base and support boxes provide a stable working environment for the equipment.

[0006] This application enables the battery box to be flipped and welded at multiple angles, but it does not solve the problem of how to clamp the battery box to avoid deformation when the battery box is thin.

[0007] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the Invention

[0008] The purpose of this invention is to provide a battery box welding device that can effectively solve the above-mentioned technical problems.

[0009] To achieve the objectives of this invention, the following technical solution is adopted:

[0010] A battery box welding device includes: a machine base, a battery box body, and a battery box base plate;

[0011] An external clamping assembly for fixing the battery box body, a flipping assembly for rotating the battery box body, a welding assembly for welding the battery box body, and a feeding assembly for feeding the battery box bottom plate.

[0012] The flipping assembly includes: a suction cup for picking up material from the bottom plate of the battery box, a flipping assembly for flipping the main body of the battery box, and an inner clamping assembly for internally clamping the main body of the battery box.

[0013] The external clamping assembly includes: a clamping plate for externally fixing the battery box body, a stop block fixedly installed on the clamping plate, and a welding groove provided on the clamping plate;

[0014] The inner clamping assembly includes: a fixed rod; a piston fixedly mounted on the fixed rod; a sleeve slidably mounted on the piston; a fixed sleeve, a slider, a support member, and a second spring. The fixed sleeve is connected to the sleeve, the fixed sleeve is slidably connected to the slider, the slider is fixedly connected to the support member, and the second spring is fixedly connected to the support member and the slider, respectively.

[0015] Furthermore, the inner clamping assembly also includes: a support base fixedly installed on the machine base; a fixing rod fixedly installed on the support base; a limiting groove formed on the sleeve; a limiting block slidably connected to the limiting groove; a movable sleeve fixedly installed on the limiting block; and a power source fixedly installed on the fixing rod.

[0016] Furthermore, the power source output shaft passes through the fixed rod, piston, and sleeve in sequence, the movable sleeve is fixedly connected to the power source output shaft, and the movable sleeve is sleeved on the surface of the sleeve.

[0017] Furthermore, the feeding assembly includes: a conveyor belt, a fixed base, and a magnetic suction component; the conveyor belt is fixedly installed on the surface of the machine base, the conveyor belt is fixedly connected to the fixed base, and the fixed base is fixedly connected to the magnetic suction component.

[0018] Furthermore, the flipping assembly includes: multiple sets of straight grooves and threaded grooves formed on the inner surface of the sleeve, wherein the straight grooves and the threaded grooves are alternately connected;

[0019] Furthermore, an inclined groove is provided at the position where the straight groove and the threaded groove communicate, a spring abuts against the inclined groove, a push block is fixedly installed on the spring, the surface of the push block is chamfered, the push block is slidably connected to the sliding groove, an elastic rope is fixedly installed on the push block, and the end of the elastic rope is fixedly connected to the end of the inclined groove.

[0020] Furthermore, the welding assembly includes: a welding robot, a laser welding head, and a nozzle; the welding robot is fixedly installed on the surface of the machine base, the welding robot is fixedly connected to the laser welding head, the laser welding head is fixedly connected to the nozzle, and a flexible tube is connected to the sleeve, with one end of the flexible tube connected to the nozzle.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention discloses a battery box welding device. A support member clamps the battery box body from the inside, and a clamping plate clamps the battery box body from the outside. Under the action of the support member, the clamping plate can prevent the battery box body from deforming due to pressure, thereby achieving full clamping of the battery box body. This can fix the battery box body and prevent the battery box body from shaking during the welding process, which would affect the welding of the battery box body. Furthermore, under the action of the support member, the clamping plate can be prevented from damaging the battery box body. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] Figure 1 This is a schematic diagram of a battery box welding device according to the present invention;

[0025] Figure 2 This invention relates to a battery box welding device. Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 This is a schematic diagram of the feeding assembly of a battery box welding equipment according to the present invention;

[0027] Figure 4 This is a schematic diagram of the external clamping assembly of a battery box welding device according to the present invention;

[0028] Figure 5 This is a schematic diagram of the clamping plate of a battery box welding device according to the present invention;

[0029] Figure 6 This is a schematic diagram of the flipping component of a battery box welding device according to the present invention;

[0030] Figure 7 This is a cross-sectional schematic diagram of the flipping assembly of a battery box welding device according to the present invention;

[0031] Figure 8 This invention relates to a battery box welding device. Figure 7 Enlarged view of point B in the middle;

[0032] Figure 9 This is a schematic diagram of the sleeve of a battery box welding device according to the present invention;

[0033] Figure 10 This is a schematic cross-sectional view of the sleeve of a battery box welding device according to the present invention;

[0034] Figure 11 This invention relates to a battery box welding device. Figure 10 Enlarged view of point C in the middle;

[0035] Figure 12 This is a schematic diagram of a battery box for a battery box welding device according to the present invention.

[0036] In the diagram: 1. Machine base; 2. Tilting assembly; 21. Support base; 22. Power source; 23. Limiting groove; 24. Limiting plate; 25. Moving sleeve; 26. Suction cup; 27. Fixed rod; 271. Piston; 272. Limiting block; 273. Spring three; 28. Sleeve; 281. One-way valve; 282. Straight groove; 283. Threaded groove; 284. Inclined groove; 285. Spring one; 286. Push block; 29. ​​Inner clamping assembly; 291. Fixed sleeve; 292. Slider; 293. Support component; 294. Spring two; 3. Outer clamping assembly; 31. Linear movement module; 32. Clamping plate; 321. Welding groove; 33. Stop block; 4. Feeding assembly; 41. Conveyor belt; 42. Fixed base; 43. Magnetic suction component; 5. Welding assembly; 51. Welding robot; 52. Laser welding head; 53. Nozzle. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0038] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation on the scope of protection of this invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0039] like Figures 1 to 12 As shown, the present invention provides a battery box welding device, comprising: a machine base 1, a battery box body, and a battery box base plate; a loading robot is provided on the surface of the machine base 1 for gripping and loading the battery box body; an external clamping assembly 3 for fixing the battery box body, a flipping assembly 2 for rotating the battery box body, a welding assembly 5 for welding the battery box body, and a loading assembly 4 for loading the battery box base plate; the flipping assembly 2 includes: a flipping assembly 2 for rotating the battery box, and an internal clamping assembly 29 for internally clamping the battery box body.

[0040] Specifically, the feeding component 4 feeds the battery box base plate, and the feeding robot sends the battery box body to the outer clamping component 3. The battery box body is fixed by the outer clamping component 3 and the inner clamping component 29. Then, the battery box body is welded by the welding component 5. After welding, the battery box body is rotated by the flipping component 2 and the battery box base plate is removed. Finally, the battery box body and the base plate are welded by the welding component 5, thereby realizing automated overall welding of the battery box with low human intervention and high welding efficiency.

[0041] To elaborate, the battery box needs to be fixed during welding to prevent shaking and affecting the welding effect. Therefore, this application sets up an external clamping component 3 and an internal clamping component 29 to fix the battery box. The external clamping component 3 includes: a linear motion module 31, a clamping plate 32, and a stop block 33. The linear motion module 31 is fixedly installed on the surface of the machine base 1. The linear motion module 31 is fixedly connected to the clamping plate 32. The clamping plate 32 has a welding groove 321 and is fixedly connected to the stop block 33. The above structure fixes the battery box on the machine base 1. It is said that there are two sets. When in use, the two sets of linear motion modules 31 drive the clamping plates 32 to move relative to each other, and initially fix the battery box body (the initial fixation means that the clamping plates 32 fix the battery box body with a small force, and the battery box body will still shake under the action of external force, but the initial fixation clamping force will not cause the battery box body to deform). At this time, the loading robot arm carries the battery box body to move along the axial direction of the linear motion module 31, so that the battery box body contacts the stop block 33, thereby realizing the initial fixation and positioning of the battery box body.

[0042] However, since the battery box body is formed by bending a metal plate, its thickness is relatively thin and it is prone to deformation. The external clamping component 3 alone cannot completely restrain it. Therefore, after the battery box body is initially fixed by the external clamping component 3, an internal clamping component 29 is needed for auxiliary fixation. The internal clamping component 29 includes: a support base 21 fixedly mounted on the machine base 1; a fixing rod 27 fixedly mounted on the support base 21; a piston 271 fixedly mounted on the fixing rod 27; a sleeve 28 slidably mounted on the piston 271; a limiting groove 23 formed on the sleeve 28; a limiting plate 24 slidably connected to the limiting groove 23; and a limiting plate 24 fixedly mounted on the limiting groove 23. The movable sleeve 25 on the position plate 24 is fixedly installed on the power source 22 on the fixed rod 27. The output shaft of the power source 22 passes through the fixed rod 27, piston 271 and sleeve 28 in sequence. The movable sleeve 25 is fixedly connected to the output shaft of the power source 22. The movable sleeve 25 is sleeved on the surface of the sleeve 28. There are also a fixed sleeve 291, a slider 292, a support member 293 and a second spring 294. The fixed sleeve 291 is connected to the sleeve 28 and slidably connected to the slider 292. The slider 292 is fixedly connected to the support member 293. The second spring 294 is fixedly connected to the support member 293 and the slider 292 respectively. The power source 22 can be a hydraulic cylinder.

[0043] After the battery box body is initially fixed by the external clamping component 3, the power source 22 is started to drive the moving sleeve 25 to move, so that the limiting plate 24 slides in the limiting groove 23. When the limiting plate 24 slides to one end of the limiting groove 23, the moving sleeve 25 continues to move, driving the sleeve 28 to move. At the same time, the piston 271 moves relative to the sleeve 28, so that the piston 271 squeezes the gas inside the sleeve 28 into the fixed sleeve 291 and pushes the slider 292 to drive the support member 293 to extend, thereby realizing the internal clamping of the battery box body. When the support member 293 is clamped internally, the linear movement module 31 is started simultaneously to drive the clamping plate 32 to continue clamping the battery box body. When the support member 293 moves, it will squeeze the second spring 294. After the second spring 294 resets, it can drive the support member 293 to reset.

[0044] In other words, the support member 293 clamps the battery box body from inside, and the clamping plate 32 clamps the battery box body from the outside. Under the action of the support member 293, the clamping plate 32 can prevent the battery box body from deforming due to pressure, thereby achieving full clamping of the battery box body. On the one hand, it can fix the battery box body and prevent the battery box body from shaking during the welding process, which would affect the welding of the battery box body. On the other hand, under the action of the support member 293, it can prevent the clamping plate 32 from damaging the battery box body. When the loading robot arm is loading, it drives the battery box body to contact the stop block 33, thereby achieving the positioning of the battery box body and ensuring the welding accuracy of the battery box body.

[0045] In summary, this application employs two clamping methods: external clamping and internal clamping. The battery box body is positioned during external clamping, and the internal clamping is performed synchronously with the external clamping. This avoids damaging the battery box with a single clamping method and ensures the precision of welding the battery box body.

[0046] It should be noted that in this application, both the battery box body and the base plate are placed at an angle, which allows the weld seam on the body to be at the top, making it easier to observe the welding process manually. The welding groove 321 on the clamping plate 32 allows the welding assembly 5 to weld the weld seam on the side of the battery box body from the side even when the weld seam on the battery box body is not at the top, thus improving the welding success rate of this application.

[0047] After the main body of the battery box is welded, the bottom plate of the battery box needs to be welded to the main body of the battery box. At this time, the bottom plate of the battery box needs to be removed. The bottom plate of the battery box is loaded by the loading component 4, and then the bottom plate of the battery box is removed by the suction cup 26 and sent to the main body of the battery box for welding. Specifically, the loading component 4 includes: a conveyor belt 41, a fixed base 42, and a magnetic suction component 43. The conveyor belt 41 is fixedly installed on the surface of the machine base 1. The conveyor belt 41 is fixedly connected to the fixed base 42. The fixed base 42 is fixedly connected to the magnetic suction component 43. The magnetic suction component 43 can be a magnet.

[0048] The battery box bottom plate is mounted on the fixed base 42 by the magnetic suction 43. The battery box bottom plate is transported towards the battery box body by the conveyor belt 41. The fixed base 42 ensures that the battery box bottom plate and the battery box body are at the same height, avoiding welding failure due to misalignment between the battery box body and the battery box body after the suction cup 26 picks up the material.

[0049] When it is necessary to remove material from the bottom plate of the battery box, the power source 22 is started to drive the moving sleeve 25 to continue moving, so that the suction cup 26 moves towards the bottom plate of the battery box. The suction cup 26 picks up the bottom plate of the battery box and moves under the action of the power source 22 to dock the bottom plate of the battery box with the main body of the battery box, thus completing the removal of material from the bottom plate of the battery box.

[0050] Specifically, when the movable sleeve 25 with suction cup 26 picks up the material, the sleeve 28 moves accordingly, at which time spring 3 273 deforms. Then, the suction cup 26 completes the material picking. When the movable sleeve 25 with suction cup 26 aligns the battery base plate with the battery body, spring 3 273 gradually returns to its original position to prevent the sleeve 28 from moving towards the power source 22, which would cause the alignment to fail. When the power source 22 drives the movable sleeve 25 to move, on the one hand, it can drive the support member 293 to support and fix the battery body from the inside of the battery body, preventing the external clamp from damaging the battery body. On the other hand, it can pick up the battery base plate and directly align it with the battery body, saving positioning time and improving welding efficiency.

[0051] Furthermore, a ball bearing can be installed on the side of the support member 293 that contacts the battery box body, so as to ensure the support force while also ensuring the freedom of movement of the sleeve 28.

[0052] Because the battery box requires welding on different parts, multiple welding operations are necessary. Therefore, the battery box needs to be flipped during welding. The flipping component 2 includes multiple sets of straight grooves 282 and threaded grooves 283 formed on the inner surface of the sleeve 28. The straight grooves 282 and threaded grooves 283 are alternately connected. When the moving sleeve 25 moves the sleeve 28, the piston 271 moves in the straight groove 282 through the limiting block 272. When it is necessary to rotate the battery box body, the power source 22 controls the moving sleeve 25 to continue moving the sleeve 28 linearly, so that the limiting block 272 moves to the inclined groove 284 and proceeds... The sleeve 28 rotates under the limit of the threaded groove 283 and the inclined groove 284, and drives the battery box body to rotate through the support member 293, thereby changing the welding position and facilitating the welding assembly 5 to perform welding. In other words, when the suction cup 26 picks up the material, it can drive the battery box body to rotate, so that after the battery box body has been welded once, when welding the battery box body and the battery box bottom plate, the subsequent welding position can be avoided to be adjacent to the weld on the battery box body, thereby realizing the repositioning when welding the battery box bottom plate, avoiding the weld from melting point and reducing the weld quality.

[0053] Please refer to the instruction manual appendix. Figure 12 When welding the main body of the battery box, the weld seam is X. The suction cup 26 picks up the material and flips the main body of the battery box. Then, when welding the bottom plate of the battery box and the main body of the battery box, the weld seam is Y. However, the weld seam X rotates and does not come into contact with the weld seam Y. There will be no continuous welding of a single weld seam, which will lead to a deterioration in the weld quality. Then, weld seam O, weld seam I, and weld seam Z are welded in sequence to complete the welding of the entire battery box.

[0054] In addition, to ensure that the limiting block 272 can move stably from the straight groove 282 to the threaded groove 283, an inclined groove 284 is provided at the connection between the straight groove 282 and the threaded groove 283. A spring 285 abuts against the inclined groove 284, and a push block 286 is fixedly installed on the spring 285. The surface of the push block 286 is chamfered, and the push block 286 is slidably connected to the slide. An elastic rope is fixedly installed on the push block 286, and the end of the elastic rope is fixedly connected to the end of the inclined groove 284. The depth of the inclined groove 284 gradually increases from the direction of the power source 22 towards the bottom plate of the battery box. When the limiting block 272 moves inside the straight groove 282, it drives the push block 286 to move inside the inclined groove 284, so that the limiting block 272 can push the push block 286 when it moves. Block 286 moves inside the inclined groove 284, causing the elastic rope to deform under force. Simultaneously, guided by the inclined surface of the inclined groove 284, block 286 is pushed into the inclined groove 284. At this time, the limiting block 272 contacts the chamfered surface of the pushing block 286. Under the action of the chamfered surface, the pushing block 286 is squeezed, causing spring 285 to contract and allowing the limiting block 272 to move normally. Then, spring 285 and the elastic rope reset, respectively driving the pushing block 286 to reset and pulling the pushing block 286 upward. When the limiting block 272 moves from the straight groove 282 towards the power source 22, it is blocked by the pushing block 286 and enters the threaded groove 283, ensuring the effect of rotating the battery box body to change the welding position and ensuring the stability of this application when changing the welding surface.

[0055] It should be noted that when the piston 271 moves to the middle of the straight groove 282, the positive pressure chamber and the negative pressure chamber are connected through the threaded groove 283. However, the piston 271 moves quickly, and the number of limit blocks 272 is the same as the number of straight grooves 282 to ensure the sealing effect.

[0056] Finally, the welding assembly 5 of this application includes: a welding robot 51, a laser welding head 52, and a nozzle 53; the welding robot 51 is fixedly installed on the surface of the machine base 1, the welding robot 51 is fixedly connected to the laser welding head 52, the laser welding head 52 is fixedly connected to the nozzle 53, and the nozzle 53 blows air towards the laser welding head 52. A hose is connected to the positive pressure chamber of the sleeve 28, and one end of the hose is connected to the nozzle 53. During use, when the moving sleeve 25 moves to drive the suction cup 26 to pick up materials or when the moving sleeve 25 moves to drive the battery box body to flip, the gas in the positive pressure chamber can be squeezed and discharged to the laser welding head through the nozzle 53. That is to say, after each welding is completed, the nozzle 53 will spray air towards the laser welding head 52 to remove dust and prevent dust from sticking to the laser welding head 52 and affecting the use effect of the laser welding head 52. A one-way valve 281 is fixedly installed on the sleeve 28, which can draw in gas from outside the sleeve 28 to ensure the pressure in the positive pressure chamber.

[0057] In summary, this application achieves internal support of the battery box body by controlling the movement of the power source 22, and also enables the battery box to be flipped during welding, allowing for material handling of the battery box bottom plate during welding, and interspersing air jet cleaning of the laser welding head during welding gaps to ensure the cleaning effect of the laser welding head 52.

[0058] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0059] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A battery box welding device, characterized in that, Include: The machine table, the battery box body, the battery box bottom plate; The outer clamping assembly for fixing the battery box body, the turnover assembly for driving the battery box body to overturn, the welding assembly for welding the battery box body, the feeding assembly for feeding the battery box bottom plate; The turnover assembly includes: a suction cup for taking the battery box bottom plate, a turnover assembly for driving the battery box body to overturn, and an inner clamping assembly for clamping the battery box body; The outer clamping assembly includes: a clamping plate for fixing the battery box body, a stopper fixedly installed on the clamping plate, and a welding groove formed in the clamping plate; The inner clamping assembly includes: a fixed rod, a piston fixedly installed on the fixed rod, a sleeve slidingly installed on the piston, a fixed sleeve, a sliding block, a support, and a second spring, the fixed sleeve communicates with the sleeve, the fixed sleeve slidingly connects with the sliding block, the sliding block fixedly connects with the support, and the second spring fixedly connects with the support and the sliding block respectively; The feeding assembly includes: a conveyor belt, a fixed seat, and a magnetic attraction piece; the surface of the machine table is fixedly installed with a conveyor belt, the conveyor belt is fixedly connected with a fixed seat, and the fixed seat is fixedly connected with a magnetic attraction piece; The turnover assembly includes: a plurality of straight grooves and thread grooves formed in the inner surface of the sleeve, the straight grooves and the thread grooves are alternately communicated; The straight groove and the thread groove are provided with an inclined groove at the communicated position, the inclined groove is abutted with a spring, the spring is fixedly installed with a push block, the surface of the push block is provided with a chamfer, the push block slidingly connects with a sliding groove, the push block is fixedly installed with an elastic rope, and the end of the elastic rope is fixedly connected with the end of the inclined groove.

2. A battery case welding apparatus according to claim 1, wherein The inner clamping assembly further includes: a support fixedly installed on the machine table, a fixed rod fixedly installed on the support, a limiting groove formed in the sleeve, a limiting block slidingly connected with the limiting groove, a moving sleeve fixedly installed on the limiting block, and a power source fixedly installed on the fixed rod.

3. A battery case welding apparatus according to claim 2, wherein The output shaft of the power source penetrates the fixed rod, the piston and the sleeve in sequence, the moving sleeve is fixedly connected with the output shaft of the power source, and the moving sleeve is sleeved on the surface of the sleeve.

4. A battery case welding apparatus according to claim 1, wherein The welding assembly includes: a welding manipulator, a laser welding head, and a spray head; the surface of the machine table is fixedly installed with a welding manipulator, the welding manipulator is fixedly connected with a laser welding head, the laser welding head is fixedly connected with the spray head, the sleeve is communicated with a hose, and one end of the hose is communicated with the spray head.

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