Welding jig

Abstract

The invention relates to the field of machining, in particular to a welding jig which comprises a base plate, a fixing seat is arranged on the side edge of the base plate and provided with a supporting beam of a cantilever structure, inclined power telescopic mechanisms are symmetrically arranged on the two sides of the supporting beam, and a clamping plate at the movable end of each inclined power telescopic mechanism is provided with a vertical clamping part and a horizontal clamping part. A supporting plate is arranged below the supporting beam and connected with a vertical power telescopic mechanism. A ventilation pipeline is arranged in the middle of the upper end of the supporting beam; one end of the substrate is provided with a movable baffle and a swing mechanism; a guide rod is arranged on the base plate; a vertical lower pressing strip, a transverse side pressing strip and a reverse communication transmission mechanism are arranged in the clamping plate; floating ball mechanisms are arranged at the ends of the lower pressing plate and the side pressing plate, and the lower pressing plate can slide horizontally and is provided with a sliding groove matched with a limiting deflector rod on the fixed seat. The device achieves the technical effects that the to-be-welded shell can be stably clamped, welding operation is convenient, ventilation is effective, limiting is accurate, and the position of the pressing plate is flexibly adjusted.

Description

Technical Field

[0001] This application relates to the field of machining, and in particular to a welding fixture. Background Technology

[0002] In battery manufacturing technology, the outer casing of battery cells is typically made of steel and requires welding to achieve a tight seal. As the battery industry continues to develop, the performance and quality requirements for batteries are becoming increasingly stringent, prompting continuous optimization of every stage of the battery manufacturing process. Welding, as a critical process, directly impacts battery performance and safety. A good welding process ensures the battery casing's seal, prevents leakage of internal materials, and thus guarantees the battery's normal use and lifespan.

[0003] In traditional battery steel casing welding processes, the casing needs to be bent and shaped multiple times before the central weld is applied in the final step. To ensure the accuracy and stability of the welding, the casing needs to be secured before welding. Currently, there are two common securing methods used in the industry: manual clamps and universal clamps. Manual clamps rely on manual operation to hold and secure the casing, while universal clamps utilize their versatility to secure casings of different specifications.

[0004] However, these existing fixing methods have obvious drawbacks. Manual clamps rely on manual operation, which is not only inefficient, but also makes it difficult to guarantee clamping accuracy, leading to deviations. General-purpose clamps, due to a lack of specific design, are prone to deformation of thin-walled shells when clamping them for welding due to stress concentration. This deformation directly affects the sealing of the weld, thus adversely impacting battery performance. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this application provides a welding fixture that can firmly clamp the shell to be welded, reduce the deformation of the thin-walled shell to be welded due to stress concentration, ensure welding quality, facilitate welding operation, and effectively improve welding effect.

[0006] This application is achieved through the following technical solution: A welding fixture includes a base plate, a fixed seat on the side of the base plate, a support beam arranged in a cantilever structure on the fixed seat, and oblique power telescopic mechanisms symmetrically arranged on both sides of the support beam. A clamping plate is provided at the movable end of each oblique power telescopic mechanism. The clamping plate has a vertical clamping part and a horizontal clamping part arranged at right angles. The vertical clamping part faces the upper end face of the support beam, and the horizontal clamping part faces the side end face of the support beam. The oblique power telescopic mechanism can drive the clamping plate to move linearly along an oblique direction, so that the vertical and horizontal clamping parts simultaneously approach the support beam, thereby achieving a clamping action on the shell to be welded placed on the support beam. A support plate is provided below the support beam, and the support plate is fixed to the vertical power telescopic mechanism. The vertical power telescopic mechanism can drive the support plate to move upward, so that the support plate approaches the support beam, thereby achieving a clamping action on the shell to be welded placed on the support beam.

[0007] By adopting the above technical solution, the oblique power telescopic mechanism drives the clamping plate to move obliquely, so that the vertical clamping part and the horizontal clamping part of the clamping plate simultaneously approach the support beam. This can apply uniform vertical downward pressure and horizontal extrusion force to the shell to be welded placed on the support beam, thereby achieving clamping and fixing of the shell and avoiding deformation of the shell due to uneven force. The vertical power telescopic mechanism drives the support plate to move upward and approach the support beam, which can support the shell to be welded from below, improving stability.

[0008] Optionally, the upper middle part of the support beam is provided with a welding groove arranged along the length direction.

[0009] By adopting the above technical solution, a welding groove is set in the middle of the upper end of the support beam along the length direction, which makes it easier for the welding gun to weld the weld seam in the center of the shell to be welded along the welding groove, which helps to improve the welding quality.

[0010] Optionally, the support beam is provided with a ventilation pipe in the middle, and the bottom of the welding groove is provided with a number of ventilation holes along the length of the support beam. The ventilation holes are connected to the ventilation pipe, and the ventilation pipe is connected to a compressed air pipe.

[0011] By adopting the above technical solution, a ventilation pipe is set in the middle of the support beam, and ventilation holes connected to the ventilation pipe are arranged at the bottom of the welding tank along the length of the support beam. The ventilation pipe is connected to a compressed air pipe, which allows compressed air to be blown to the welding area through the ventilation pipe and ventilation holes. This can effectively clean impurities in the welding tank and improve the welding environment, which is beneficial to improving the welding quality.

[0012] Optionally, the substrate is provided with a movable baffle at the end away from the fixed seat. The movable baffle can limit the position of the shell to be welded on the support beam and prevent the shell to be welded from falling off the support beam.

[0013] By adopting the above technical solution, a movable baffle is set at the end of the base plate of the welding fixture away from the fixed seat, which can limit the position of the shell to be welded on the support beam, prevent the shell to be welded from falling off the support beam, enhance the fixing effect of the shell to be welded, and improve the structural stability.

[0014] Optionally, the end of the substrate away from the fixed seat is provided with a swing mechanism, and the movable baffle is fixed to the movable end of the swing mechanism. The swing mechanism can drive the movable baffle to swing in the vertical direction so that the movable baffle moves to the end of the support beam, thereby realizing the limiting action of the shell to be welded placed on the support beam.

[0015] By adopting the above technical solution, the support beam can support the shell to be welded, the oblique power telescopic mechanism drives the clamping plate to move obliquely, so that the vertical clamping part and the horizontal clamping part approach the support beam at the same time, thereby clamping the shell. The vertical power telescopic mechanism drives the support plate to rise and approach the support beam, thereby clamping the shell. The swing mechanism drives the movable baffle to swing in the vertical direction and approach the support beam, which can limit the shell to be welded placed on the support beam, prevent it from falling off the support beam, and enhance the structural stability.

[0016] Optionally, the base plate is provided with obliquely arranged guide rods; the clamping plate is fixed to the movable end of the oblique power telescopic mechanism by a mounting bracket, and the mounting bracket is provided with guide holes adapted to the guide rods.

[0017] By adopting the above technical solution, the obliquely arranged guide rods cooperate with the guide holes on the clamping plate to guide the oblique linear movement of the clamping plate, so that the clamping plate can move more accurately along the oblique direction under the drive of the oblique power telescopic mechanism, ensuring that the vertical clamping part and the horizontal clamping part accurately approach the support beam, realizing the stable clamping of the shell to be welded placed on the support beam, and at the same time, making the downward pressure applied by the clamping plate more uniform, avoiding deformation of the shell to be welded, and improving the welding quality.

[0018] Optionally, the vertical clamping part is a vertical downward pressure bar slidably connected in the clamping plate along the vertical direction, and the horizontal clamping part is a horizontal side pressure bar slidably connected in the clamping plate along the horizontal direction; a lower pressure plate is provided at the end of the vertical downward pressure bar near the support beam, and a side pressure plate is provided at the end of the horizontal side pressure bar near the support beam; a reverse connection transmission mechanism is provided between the vertical downward pressure bar and the horizontal side pressure bar, and the reverse connection transmission mechanism can drive the lower pressure plate to move closer to or further away from the clamping plate in the horizontal direction when it moves away from or closer to the clamping plate in the vertical direction.

[0019] By adopting the above technical solution, vertical downward pressure strips and horizontal side pressure strips arranged at right angles and slidably connected are set in the clamping plate, and a reverse transmission mechanism is set between them, which can effectively improve the adaptability of the welding fixture to the shells to be welded of different specifications and the clamping reliability. When the oblique power telescopic mechanism drives the clamping plate to move, the reverse transmission mechanism plays a role, so that while the lower pressure plate moves away from or towards the clamping plate in the vertical direction, it can drive the side pressure plate to move towards or away from the clamping plate in the horizontal direction. Specifically, if the lower pressure plate first abuts against the top of the shell to be welded during the oblique movement, under the action of the reverse transmission mechanism, as the oblique power telescopic mechanism continues to advance, the shell to be welded will limit the lower pressure plate, causing the lower pressure plate to retract and approach the clamping plate. At this time, the side pressure plate will extend from the pressure plate and move away from the clamping plate, gradually approaching the side wall of the shell to be welded until it abuts against the side wall of the shell to be welded, thereby achieving reliable clamping of the shell in both vertical and horizontal directions simultaneously. If the side pressure plate first abuts against the side wall of the shell to be welded during the oblique movement, under the action of the reverse transmission mechanism, as the oblique power telescopic mechanism continues to advance, the shell to be welded will limit the side pressure plate, causing the side pressure plate to retract and approach the clamping plate. At this time, the lower pressure plate will extend from the pressure plate and move away from the clamping plate, gradually approaching the top of the shell to be welded until it abuts against the top of the shell to be welded, thereby achieving reliable clamping of the shell in both vertical and horizontal directions simultaneously. This linkage mechanism enables the welding fixture to adaptively adjust according to the specifications of different shells to be welded, avoiding problems such as clamping instability caused by differences in shell size. This achieves reliable clamping and fixing of shells of different specifications to be welded, which is beneficial to improving the stability of the welding process and the welding quality.

[0020] Optionally, the vertical downward pressure strip and the horizontal side pressure strip are provided with teeth, and the reverse transmission mechanism includes a horizontal transmission shaft and a vertical transmission shaft rotatably disposed in the cavity of the clamping plate; the input end of the vertical transmission shaft is provided with a vertical transmission tooth that meshes with the teeth of the vertical downward pressure strip, and the output end is provided with a first conical tooth; the input end of the horizontal transmission shaft is provided with a horizontal transmission tooth that meshes with the teeth of the horizontal side pressure strip, and the output end is provided with a second conical tooth; the first conical tooth meshes with the second conical tooth.

[0021] By adopting the above technical solution, the teeth on the vertical downward pressure bar and the horizontal side pressure bar cooperate with the reverse-connecting transmission mechanism. When the vertical downward pressure bar or the horizontal side pressure bar moves, its teeth drive the vertical transmission teeth or the horizontal transmission teeth to rotate. The vertical transmission shaft and the horizontal transmission shaft achieve transmission through the meshing of the first conical teeth and the second conical teeth. This conical transmission structure can achieve efficient power transmission and direction conversion. Due to the meshing of the first conical teeth and the second conical teeth, the movements of the vertical downward pressure bar and the horizontal side pressure bar can be correlated. When the vertical downward pressure bar moves downward, it can drive the horizontal side pressure bar to move laterally through transmission, and vice versa. In this way, multi-angle, synchronous clamping of the shell to be welded placed on the support beam can be achieved, making the clamping more stable and uniform, avoiding deformation of the shell to be welded due to uneven clamping, thereby ensuring welding quality and improving the performance and reliability of the welding fixture.

[0022] Optionally, the ends of the lower pressure plate and the side pressure plate that abut against the shell to be welded are provided with a floating ball mechanism. The floating ball mechanism includes balls, a reset elastic element, and an abutment plate. The ends of the lower pressure plate and the side pressure plate are evenly distributed with a plurality of mounting grooves adapted to the balls. The abutment plate is fixed on the lower pressure plate and the side pressure plate, and the abutment plate is evenly distributed with a plurality of limiting holes adapted to the mounting grooves. The reset elastic element is placed in the mounting groove to provide elastic force to drive the balls to abut against the limiting holes, and to make the balls partially protrude from the abutment plate.

[0023] By adopting the above technical solution, a floating ball mechanism is installed at the ends of the lower pressure plate and side pressure plate that abut against the shell to be welded. The floating design of the floating ball mechanism allows it to abut against the shell to be welded first during the clamping and movement of the lower pressure plate or side pressure plate. While ensuring effective transmission of reaction force and without affecting the operating principle of the reverse transmission mechanism, the balls form sliding friction with the shell to be welded. Compared with traditional direct contact friction, this greatly reduces frictional damage to the shell to be welded caused by the lower pressure plate and side pressure plate. This not only reduces the risk of scratches, deformation, and other defects on the surface of the shell to be welded due to friction, improving the surface quality of the shell, but also better protects the structural integrity of the shell to be welded, ensuring the smooth progress of subsequent welding processes. At the same time, the elastic force provided by the reset elastic element in the floating ball mechanism ensures that the balls always maintain good contact with the shell to be welded, further enhancing the stability and reliability of clamping, which is conducive to improving the overall performance of the welding fixture and the welding quality.

[0024] Optionally, the lower pressure plate is slidably connected to the vertical lower pressure strip along the horizontal direction, and the end of the lower pressure plate near the weld of the shell to be welded is provided with a vertically arranged groove. A limiting lever is fixed on the fixed seat. The limiting lever is slidably connected in the groove. When the vertical lower pressure strip moves, the limiting lever slides in the groove to adjust the horizontal position of the lower pressure plate so that the horizontal distance between the lower pressure plate and the weld of the shell to be welded remains constant.

[0025] By adopting the above technical solution, when the welding fixture clamps the shell to be welded, the oblique power telescopic mechanism drives the clamping plate to move, which in turn moves the vertical downward pressure bar and the horizontal side pressure bar. The two are linked by a reverse transmission mechanism. During the movement of the vertical downward pressure bar, the lower pressure plate slides horizontally on the vertical downward pressure bar, and the end of the lower pressure plate near the weld seam of the shell to be welded has a vertically arranged groove. The limiting lever on the fixed seat slides in the groove, keeping the horizontal distance between the lower pressure plate and the weld seam of the shell to be welded constant. For shells of different specifications, this linkage mechanism can automatically adjust the horizontal position of the lower pressure plate, ensuring that the horizontal distance between the lower pressure plate and the weld seam of the shell to be welded remains constant. In this way, regardless of the specifications of the shell to be welded, the device can ensure stable clamping and precise positioning of the shell to be welded, avoiding weld warping caused by inaccurate positioning or unstable clamping, thus improving welding quality.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The oblique power telescopic mechanism of this application drives the clamping plate to move along an oblique straight line, so that the vertical clamping part and the horizontal clamping part simultaneously approach the support beam, applying uniform vertical downward pressure and horizontal extrusion force to the shell to be welded, thereby clamping and fixing the shell to be welded and avoiding deformation of the shell to be welded due to uneven force. The vertical power telescopic mechanism drives the support plate to move upward and approach the support beam, which can adjust the gap distance between the support plate and the support beam, making it easier for the shell to be welded to be inserted into the support beam and improving adaptability. It can also make the support plate support the shell to be welded from below after the shell to be welded is inserted, thereby improving stability. The vertical downward pressure bar and the horizontal side pressure bar in the clamping plate of this application are slidably connected and linked by a reverse transmission mechanism, so that the lower pressure plate and the side pressure plate can better adapt to the shape of the shell to be welded for clamping. The floating ball mechanism at the ends of the lower pressure plate and the side pressure plate can make the contact more flexible and reduce damage to the shell. The lower pressure plate of this application slides horizontally along the vertical downward pressure strip, and its horizontal position is adjusted by the limit lever and the slide groove, so that the horizontal distance between the lower pressure plate and the weld of the shell to be welded remains constant, thereby further improving the accuracy and stability of welding. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the welding fixture described in Embodiment 1; Figure 2 This is a top view of the welding fixture described in Embodiment 1; Figure 3 This is a longitudinal sectional view of the welding fixture at the guide rod as described in Embodiment 1; Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the welding fixture described in Embodiment 1 at the support beam; Figure 5 This is a schematic diagram of the clamping plate described in Embodiment 2; Figure 6 This is a schematic diagram of the reverse-connection transmission mechanism described in Embodiment 2; Figure 7 This is a schematic diagram of the floating ball mechanism described in Embodiment 2; Figure 8 This is a schematic diagram of the clamping plate described in Embodiment 3; Figure 9 This is a schematic diagram of the reverse-connection transmission mechanism described in Embodiment 3.

[0028] In the diagram: 1. Base plate; 11. Fixing seat; 111. Limiting lever; 12. Mounting seat; 13. Compressed air pipe; 2. Support beam; 21. Welding groove; 22. Ventilation pipe; 23. Ventilation hole; 3. Clamping plate; 31. Vertical clamping part; 32. Horizontal clamping part; 33. Vertical downward pressure bar; 331. Lower pressure plate; 332. Slide groove; 333. T-shaped slide rail; 34. Horizontal side pressure bar; 341. Side pressure plate; 35. Reverse connection transmission mechanism; 351. Vertical transmission shaft; 3511. Vertical 3512, First conical tooth; 352, Lateral drive shaft; 3521, Lateral drive tooth; 3522, Second conical tooth; 36, Floating ball mechanism; 361, Ball; 362, Reset elastic element; 363, Abutment plate; 37, Guide block; 4, Inclined power telescopic mechanism; 41, Mounting bracket; 411, Guide hole; 5, Guide rod; 6, Support plate; 7, Vertical power telescopic mechanism; 8, Swing mechanism; 9, Movable baffle; 10, Housing to be welded; 101, Weld. Detailed Implementation

[0029] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0030] Reference Figures 1 to 3This application discloses a welding fixture, including a base plate 1. A fixing seat 11 is provided on the side of the base plate 1. The fixing seat 11 has a support beam 2 arranged in a cantilever structure. An oblique power telescopic mechanism 4 is symmetrically arranged on both sides of the support beam 2. A clamping plate 3 is provided at the movable end of the oblique power telescopic mechanism 4. The clamping plate 3 has a vertical clamping part 31 and a horizontal clamping part 32 arranged at right angles. The vertical clamping part 31 faces the upper end face of the support beam 2, and the horizontal clamping part 32 faces the side end face of the support beam 2 and is obliquely... The power telescopic mechanism 4 can drive the clamping plate 3 to move linearly along the oblique direction, so that the vertical clamping part 31 and the horizontal clamping part 32 simultaneously approach the support beam 2, thereby realizing the clamping action of the shell 10 to be welded placed on the support beam 2; a support plate 6 is provided below the support beam 2, and the support plate 6 is fixed to the vertical power telescopic mechanism 7. The vertical power telescopic mechanism 7 can drive the support plate 6 to move upward, so that the support plate 6 approaches the support beam 2, thereby realizing the clamping action of the shell 10 to be welded placed on the support beam 2.

[0031] Specifically, the base plate 1 serves as the basic component of the entire welding fixture, playing the role of supporting and fixing other components; it can be made of high-strength metal materials, such as steel plates, to ensure that it has sufficient strength and stability; the fixing seat 11 is fixed to the side of the base plate 1, and it can be fixed to the base plate 1 by bolt connection or welding; the function of the fixing seat 11 is to provide fixed support for the support beam 2, so that it can be stably arranged in a cantilever structure.

[0032] Reference Figures 1 to 3 The support beam 2 is mounted on the fixed base 11 and has a cantilever structure. It can be made of solid metal rod. The support beam 2 supports the shell 10 to be welded, and its size and shape should be adapted to the shell 10 to be welded. The shell 10 to be welded is fitted onto the support beam 2, and the support beam 2 provides support for the shell 10 to be welded, ensuring the stability of the shell 10 to be welded during the welding process. The upper middle part of the support beam 2 is provided with a welding groove 21 arranged along the length direction. The welding groove 21 can be machined on the support beam 2 by milling. The middle part of the support beam 2 is provided with a ventilation pipe 22, and the bottom of the welding groove 21 is provided with several ventilation holes 23 arranged along the length direction of the support beam 2. The ventilation holes 23 are connected to the ventilation pipe 22, and the ventilation pipe 22 is connected to the compressed air pipe 13.

[0033] Reference Figures 2 to 4 The oblique power telescopic mechanism 4 is symmetrically arranged on both sides of the support beam 2 and is installed on the base plate 1 through the support seat. It can be a telescopic cylinder, such as a hydraulic cylinder or a pneumatic cylinder. The telescopic cylinder is set at an angle, which can be 45° with the horizontal plane or can be set according to actual needs. The extended end of the telescopic cylinder is fixedly connected to the clamping plate 3. When the telescopic cylinder extends, it can drive the clamping plate 3 to move linearly along the oblique direction.

[0034] Reference Figures 2 to 4 The clamping plate 3 has an "L"-shaped structure and is mounted on the movable end of the inclined power telescopic mechanism 4 via the mounting bracket 41. The clamping plate 3 is provided with a vertical clamping part 31 and a horizontal clamping part 32 arranged at right angles. The vertical clamping part 31 and the horizontal clamping part 32 are adapted to the upper end face and side end face of the support beam 2. The clamping plate 3 and the mounting bracket 41 can be made of high-strength metal plate, such as stainless steel plate. When the telescopic cylinder extends, the vertical clamping part 31 and the horizontal clamping part 32 of the clamping plate 3 will simultaneously approach the support beam 2, thereby realizing the clamping action of the shell 10 to be welded placed on the support beam 2. The vertical clamping part 31 can apply vertical downward pressure to the shell 10 to be welded, and the horizontal clamping part 32 can apply horizontal extrusion force to the shell 10 to be welded. This composite force application mechanism can achieve uniform clamping of the shell 10 to be welded and reduce the deformation of the shell 10 to be welded.

[0035] Reference Figures 2 to 4 The support plate 6 is located below the support beam 2. It can be a flat plate made of metal, such as a steel plate. The support plate 6 is fixed to the vertical power telescopic mechanism 7, which can be a lifting cylinder, such as a pneumatic lifting cylinder. The vertical power telescopic mechanism 7 can drive the support plate 6 to move upward. When the shell to be welded 10 is inserted into the support beam 2, the support plate 6 rises and can press against the bottom of the shell to be welded 10, providing support from below and improving the stability of the shell to be welded 10. At the same time, when adjusting the gap between the support plate 6 and the support beam 2, it is easier for the shell to be welded 10 to be inserted into the support beam 2, improving the adaptability of the fixture.

[0036] Reference Figures 2 to 4 The substrate 1 has a movable baffle 9 at the end away from the fixed base 11. The movable baffle 9 can limit the position of the shell 10 to be welded on the support beam 2 and prevent the shell 10 to be welded from falling off the support beam 2. The substrate 1 has a swing mechanism 8 at the end away from the fixed base 11. The movable baffle 9 is fixed to the movable end of the swing mechanism 8. The swing mechanism 8 can drive the movable baffle 9 to swing in the vertical direction so that the movable baffle 9 is close to the support beam 2, thereby realizing the limiting action of the shell 10 to be welded placed on the support beam 2. The swing mechanism 8 can be an electric swinger or a hydraulic swinger.

[0037] Reference Figures 2 to 4The base plate 1 is provided with an obliquely arranged guide rod 5, and the mounting frame 41 is provided with a guide hole 411 that matches the guide rod 5. The guide rod 5 can be made of metal rod, such as stainless steel rod, and the guide hole 411 can be machined on the mounting frame 41 by drilling. When the oblique power telescopic mechanism 4 drives the clamping plate 3 to move linearly along the oblique direction, the cooperation between the guide rod 5 and the guide hole 411 can guide the movement of the clamping plate 3, making the movement of the clamping plate 3 more stable and accurate. At the same time, this design can also make the downward pressure applied to the clamping plate 3 on the shell 10 to be welded more uniform, further reducing the deformation of the shell 10 to be welded.

[0038] The implementation principle of this embodiment is as follows: the oblique power telescopic mechanism 4 drives the clamping plate 3 to move along an oblique straight line, so that the vertical clamping part 31 and the horizontal clamping part 32 simultaneously approach the support beam 2, applying uniform vertical downward pressure and horizontal extrusion force to the shell 10 to be welded, thereby clamping and fixing the shell 10 to be welded and avoiding deformation of the shell 10 to be welded due to uneven force; the welding groove 21 in the middle of the upper end of the support beam 2 facilitates welding along it with the welding torch, improving the welding quality; the vertical power telescopic mechanism 7 drives the support plate 6 to move upward and approach the support beam 2, which can adjust the support plate 6 and the support beam 2. The gap between them facilitates the insertion of the shell 10 to be welded into the support beam 2, improving adaptability, and also allows the support plate 6 to support the shell 10 from below after it is inserted, improving stability; the guide rod 5 arranged obliquely on the base plate 1 cooperates with the guide hole 411 on the clamping plate 3 to guide the downward pressing action of the clamping plate 3, making the downward pressure more uniform and preventing deformation of the shell 10 to be welded; the ventilation pipe 22 in the middle of the support beam 2 is connected to the ventilation hole 23 at the bottom of the welding groove 21 and is connected to the compressed air pipe 13, which can play a role in ventilation during welding and ensure the welding environment. Example 2

[0039] Reference Figures 5 to 7The difference between this embodiment and Embodiment 1 is that the vertical clamping part 31 is a vertically downward pressure bar 33 slidably connected in the clamping plate 3 along the vertical direction, and the horizontal clamping part 32 is a horizontally slidably connected in the clamping plate 3 as a transverse side pressure bar 34. A lower pressure plate 331 is provided at the end of the vertically downward pressure bar 33 near the support beam 2, and a side pressure plate 341 is provided at the end of the transverse side pressure bar 34 near the support beam 2. A reverse transmission mechanism 35 is provided between the vertically downward pressure bar 33 and the transverse side pressure bar 34. The reverse transmission mechanism 35 can drive the lower pressure plate 331 to move away from or towards the clamping plate 3 in the vertical direction, thereby causing the side pressure plate 341 to move closer to or further away from the clamping plate 3 in the horizontal direction. Specifically, the vertically downward pressure bar 33 and the transverse side pressure bar 34 can be made of square steel. The column is made of steel, and the clamping plate 3 is provided with a guide block 37 adapted to the vertical downward pressure strip 33 and the horizontal side pressure strip 34. The guide block 37 is provided with a guide groove. The vertical downward pressure strip 33 and the horizontal side pressure strip 34 are provided with teeth. The reverse connection transmission mechanism 35 includes a horizontal transmission shaft 352 and a vertical transmission shaft 351 rotatably disposed in the cavity of the clamping plate 3. The input end of the vertical transmission shaft 351 is provided with a vertical transmission tooth 3511 that meshes with the teeth of the vertical downward pressure strip 33, and the output end is provided with a first conical tooth 3512. The input end of the horizontal transmission shaft 352 is provided with a horizontal transmission tooth 3521 that meshes with the teeth of the horizontal side pressure strip 34, and the output end is provided with a second conical tooth 3522. The first conical tooth 3512 and the second conical tooth 3522 mesh with each other.

[0040] The ends of the lower pressure plate 331 and the side pressure plate 341 that abut against the housing 10 to be welded are provided with a floating ball mechanism 36. The floating ball mechanism 36 includes a ball 361, a reset elastic element 362, and an abutment plate 363. The ends of the lower pressure plate 331 and the side pressure plate 341 are evenly distributed with a plurality of mounting grooves adapted to the ball 361. The abutment plate 363 is fixed on the lower pressure plate 331 and the side pressure plate 341, and the abutment plate 363 is evenly distributed with a plurality of limiting holes adapted to the mounting grooves. The reset elastic element 362 is placed in the mounting groove to provide elastic force to drive the ball 361 to abut against the limiting hole, and to make the ball 361 partially protrude from the abutment plate 363.

[0041] The implementation principle of this embodiment is as follows: A vertical downward pressure bar 33 and a horizontal side pressure bar 34, arranged at right angles and slidably connected, are provided in the clamping plate 3. A reverse-connection transmission mechanism 35 is provided between them, which can effectively improve the adaptability of the welding fixture to the shells 10 of different specifications to be welded and the clamping reliability. When the oblique power telescopic mechanism 4 drives the clamping plate 3 to move, the reverse-connection transmission mechanism 35 plays a role, so that while the lower pressure plate 331 moves away from or closer to the clamping plate 3 in the vertical direction, it can drive the side pressure plate 341 to move closer to or away from the clamping plate 3 in the horizontal direction. Specifically, if the lower pressure plate 331 first abuts against the top of the shell 10 to be welded during the oblique movement, under the action of the reverse transmission mechanism 35, as the oblique power telescopic mechanism 4 continues to advance, the shell 10 to be welded will limit the lower pressure plate 331, causing the lower pressure plate 331 to retract closer to the clamping plate 3. At this time, the side pressure plate 341 will extend from the pressure plate and move away from the clamping plate 3, gradually approaching the side wall of the shell 10 to be welded until it abuts against the side wall of the shell 10 to be welded, thereby achieving reliable clamping of the shell in both vertical and horizontal directions. If the side pressure plate 341 first abuts against the side wall of the shell 10 to be welded during the oblique movement, under the action of the reverse connection transmission mechanism 35, as the oblique power telescopic mechanism 4 continues to advance, the shell 10 to be welded will limit the side pressure plate 341, causing the side pressure plate 341 to retract and approach the clamping plate 3. At this time, the lower pressure plate 331 will extend from the pressure plate and move away from the clamping plate 3, gradually approaching the top of the shell 10 to be welded, until it abuts against the top of the shell 10 to be welded, thereby achieving reliable clamping of the shell in both vertical and horizontal directions at the same time. This linkage mechanism enables the welding fixture to adaptively adjust according to the specifications of different shells 10 to be welded, avoiding problems such as clamping instability caused by differences in shell size. This achieves reliable clamping and fixing of shells 10 of different specifications, which is beneficial to improving the stability and welding quality of the welding process. The floating design of the floating ball mechanism 36 can first come into contact with the shell 10 to be welded during the clamping movement of the lower pressure plate 331 or the side pressure plate 341. While ensuring effective transmission of reaction force and not affecting the operating principle of the reverse connection transmission mechanism 35, the ball 361 forms sliding friction with the shell 10 to be welded. Compared with the traditional direct contact friction, this greatly reduces the frictional damage of the lower pressure plate 331 and the side pressure plate 341 to the shell 10 to be welded. Example 3

[0042] Reference Figures 8 to 9The difference between this embodiment and embodiment two is that the lower pressure plate 331 is provided with a T-shaped slide rail 333, and the lower end of the vertical lower pressure strip 33 is provided with a T-shaped groove adapted to the T-shaped slide rail 333; the lower pressure plate 331 is slidably connected to the vertical lower pressure strip 33 in the horizontal direction, and the end of the lower pressure plate 331 near the weld 101 of the shell 10 to be welded is provided with a vertically arranged groove 332, and a limiting lever 111 is fixed on the fixing seat 11; the limiting lever 111 is slidably connected in the groove 332, and when the vertical lower pressure strip 33 moves, the limiting lever 111 slides in the groove 332 to adjust the horizontal position of the lower pressure plate 331 so that the horizontal distance between the lower pressure plate 331 and the weld 101 of the shell 10 to be welded remains constant.

[0043] The implementation principle of this application embodiment is as follows: When the welding fixture is used to clamp the shell 10 to be welded, the oblique power telescopic mechanism 4 drives the clamping plate 3 to move, which in turn drives the vertical downward pressure bar 33 and the horizontal side pressure bar 34 to move. The two are linked by the reverse transmission mechanism 35. During the movement of the vertical downward pressure bar 33, since the lower pressure plate 331 is slidably connected to the vertical downward pressure bar 33 along the horizontal direction, and the lower pressure plate 331 is provided with a vertically arranged sliding groove 332 at the end near the weld 101 of the shell 10 to be welded, the limiting lever 111 on the fixed seat 11 is slidably connected in the sliding groove 332. 111 will slide in the groove 332, so that the horizontal distance between the lower pressure plate 331 and the weld 101 of the shell 10 to be welded remains constant. For shells 10 of different specifications to be welded, this linkage mechanism can automatically adjust the horizontal position of the lower pressure plate 331, so that the horizontal distance between the lower pressure plate 331 and the weld 101 of the shell 10 to be welded always remains constant. In this way, no matter how the specifications of the shell 10 to be welded change, the device can ensure stable clamping and precise positioning of the shell 10 to be welded, avoid welding edge warping due to inaccurate positioning or unstable clamping, and help improve welding quality.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A welding fixture, characterized in that, The system includes a base plate (1), a fixing seat (11) on the side of the base plate (1), a support beam (2) arranged in a cantilever structure on the fixing seat (11), and oblique power telescopic mechanisms (4) symmetrically arranged on both sides of the support beam (2). A clamping plate (3) is provided at the movable end of the oblique power telescopic mechanism (4). A vertical clamping part (31) and a horizontal clamping part (32) arranged at right angles are provided on the clamping plate (3). The vertical clamping part (31) faces the upper end face of the support beam (2), and the horizontal clamping part (32) faces the side end face of the support beam (2). The oblique power telescopic mechanism (4)... The retraction mechanism (4) can drive the clamping plate (3) to move in a straight line along the oblique direction so that the vertical clamping part (31) and the horizontal clamping part (32) approach the support beam (2) at the same time, so as to realize the clamping action of the shell (10) to be welded placed on the support beam (2); a support plate (6) is provided below the support beam (2), the support plate (6) is fixed to the vertical power telescopic mechanism (7), the vertical power telescopic mechanism (7) can drive the support plate (6) to move upward so that the support plate (6) approaches the support beam (2), so as to realize the clamping action of the shell (10) to be welded placed on the support beam (2).

2. The welding fixture according to claim 1, characterized in that, The upper middle part of the support beam (2) is provided with a welding groove (21) arranged along the length direction.

3. The welding fixture according to claim 2, characterized in that, The support beam (2) is provided with a ventilation pipe (22) in the middle. The bottom of the welding groove (21) is provided with a number of ventilation holes (23) along the length of the support beam (2). The ventilation holes (23) are connected to the ventilation pipe (22). The ventilation pipe (22) is connected to the compressed air pipe (13).

4. The welding fixture according to claim 1, characterized in that, The substrate (1) has a movable baffle (9) at one end away from the fixed seat (11). The movable baffle (9) can limit the position of the shell to be welded (10) on the support beam (2) and prevent the shell to be welded (10) from falling off the support beam (2).

5. The welding fixture according to claim 4, characterized in that, The base plate (1) is provided with a swing mechanism (8) at one end away from the fixed seat (11). The movable baffle (9) is fixed at the movable end of the swing mechanism (8). The swing mechanism (8) can drive the movable baffle (9) to swing in the vertical direction so that the movable baffle (9) moves to the end of the support beam (2) to realize the limiting action of the shell (10) to be welded on the support beam (2).

6. The welding fixture according to claim 1, characterized in that, The base plate (1) is provided with a guide rod (5) arranged obliquely; the clamping plate (3) is fixed to the movable end of the oblique power telescopic mechanism (4) by a mounting bracket (41), and the mounting bracket (41) is provided with a guide hole (411) that matches the guide rod (5).

7. The welding fixture according to claim 1, characterized in that, The vertical clamping part (31) is a vertical downward pressure bar (33) that is slidably connected in the clamping plate (3) in the vertical direction, and the horizontal clamping part (32) is a horizontal side pressure bar (34) that is slidably connected in the clamping plate (3) in the horizontal direction; the end of the vertical downward pressure bar (33) near the support beam (2) is provided with a lower pressure plate (331), and the end of the horizontal side pressure bar (34) near the support beam (2) is provided with a side pressure plate (341); a reverse connection transmission mechanism (35) is provided between the vertical downward pressure bar (33) and the horizontal side pressure bar (34), and the reverse connection transmission mechanism (35) can drive the lower pressure plate (331) to move away from or away from the clamping plate (3) in the vertical direction, thereby driving the side pressure plate (341) to move closer to or away from the clamping plate (3) in the horizontal direction.

8. The welding fixture according to claim 7, characterized in that, The vertical downward pressure bar (33) and the horizontal side pressure bar (34) are provided with teeth. The reverse connection transmission mechanism (35) includes a horizontal transmission shaft (352) and a vertical transmission shaft (351) rotatably disposed in the cavity of the clamp plate (3). The input end of the vertical transmission shaft (351) is provided with a vertical transmission tooth (3511) that meshes with the teeth of the vertical downward pressure bar, and the output end is provided with a first conical tooth (3512). The input end of the horizontal transmission shaft (352) is provided with a horizontal transmission tooth (3521) that meshes with the teeth of the horizontal side pressure bar (34), and the output end is provided with a second conical tooth (3522). The first conical tooth (3512) meshes with the second conical tooth (3522).

9. The welding fixture according to claim 7, characterized in that, The lower pressure plate (331) and the side pressure plate (341) are provided with a floating ball mechanism (36) at the ends that abut against the shell (10) to be welded. The floating ball mechanism (36) includes a ball (361), a reset elastic element (362) and an abutment plate (363). The lower pressure plate (331) and the side pressure plate (341) are evenly distributed with a plurality of mounting grooves that are adapted to the ball (361). The abutment plate (363) is fixed on the lower pressure plate (331) and the side pressure plate (341), and the abutment plate (363) is evenly distributed with a plurality of limiting holes that are adapted to the mounting grooves. The reset elastic element (362) is placed in the mounting groove to provide elastic force to drive the ball (361) to abut against the limiting hole, and to make the ball (361) partially protrude from the abutment plate (363).

10. The welding fixture according to claim 7, characterized in that, The lower pressure plate (331) is slidably connected to the vertical lower pressure strip (33) along the horizontal direction, and the end of the lower pressure plate (331) near the weld (101) of the shell (10) to be welded is provided with a vertically arranged groove (332). The fixed seat (11) is fixedly provided with a limiting lever (111). The limiting lever (111) is slidably connected in the groove (332). When the vertical lower pressure strip (33) moves, the limiting lever (111) slides in the groove (332) to adjust the horizontal position of the lower pressure plate (331) so that the horizontal distance between the lower pressure plate (331) and the weld (101) of the shell (10) to be welded remains constant.

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