Battery box body welding and assembling tool

Abstract

The utility model relates to the technical field of metal processing, and discloses a battery box body welding assembly tool which is used for positioning and clamping a battery box body and comprises a supporting plate, a front end support, a rear end support, a supporting plate rear end air cylinder, a supporting plate side face air cylinder and a welding seam pressing device. The welding structure of the battery box body is arranged on the upper surface of the supporting plate; the front end support is arranged below the front end of the supporting plate, the rear end support is arranged below the rear end of the supporting plate, the supporting plate rear end air cylinder is arranged at the rear end of the supporting plate, the supporting plate side face air cylinder is arranged on the outer side of the second side of the supporting plate, and the welding seam pressing device is connected with the supporting plate. According to the welding assembly tool, by means of the stability, accurate limiting and adjusting functions, high quality and high efficiency in the welding process are fully guaranteed, the quality and strength of welding seams are improved, and the qualified rate of the welding cost is also guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, and particularly relates to a welding and assembling tooling for a battery box body. Background Art

[0002] The aluminum alloy battery box body is a key component of the power battery system of new energy vehicles. Firstly, reducing its weight can effectively improve the energy density of the power battery. Secondly, aluminum alloy has good thermal conductivity, which can help the battery dissipate heat quickly, thereby improving the service life and safety of the battery. Moreover, the aluminum alloy battery box body is safer and more environmentally friendly. It can better resist damage caused by external impact or extrusion than a steel shell, reducing the risk of battery damage in accidents or other situations. The aluminum alloy shell in the battery pack can also be recycled, reducing resource waste and environmental pollution.

[0003] The main structure of the thin - plate aluminum alloy battery box body is made of aluminum alloy rolling plates, and the materials are usually 3xxx and 5xxx aluminum alloys. The shaping is completed by stamping and bending, and the longitudinal seam of the shell is connected by laser welding. Since the wall thickness is generally between 0.5 mm and 1 mm, this poses high requirements for the design of the welding tooling. If the clamping is unstable or the support is insufficient, deformation may occur during welding, thus affecting the quality and strength of the weld. At the same time, it is difficult to control the joint gap and misalignment amount during the welding process. In fact, it is very easy to result in insufficient assembly accuracy, thereby reducing the production efficiency and qualification rate. During the production process, if the tooling cannot effectively cope with the thermal deformation of the material, it will increase the difficulty and time of subsequent processing. In addition, the maintenance and adjustment of the tooling also require additional resources and energy, which is not ideal in terms of cost control. Therefore, the welding and assembling tooling for the aluminum alloy battery box body urgently needs to be improved to improve the production efficiency and product quality. In view of the above - mentioned existing problems, it is very necessary to research and design a new type of welding and assembling tooling for the battery box body to overcome the problems existing in the existing welding and assembling tooling for the battery box body. Summary of the Invention

[0004] In order to solve the problem that in the existing welding and assembling tooling for the battery box body, unstable clamping or insufficient support leads to deformation during welding, thus affecting the quality and strength of the weld, the utility model provides a welding and assembling tooling for the battery box body.

[0005] The technical solution adopted by the utility model to achieve the above - mentioned purpose is: a welding and assembling tooling for a battery box body, used for positioning and clamping the battery box body. The battery box body includes a first side wall, a welding structure, and a second side wall connected in sequence. The welding structure includes a first joint structure and a second joint structure. The first joint structure is connected to the first side wall, and the second joint structure is connected to the second side wall. It is characterized by including

[0006] A support plate, the support plate is used to support the battery box body, and the welding structure is arranged on the upper surface of the support plate;

[0007] A front support, the front support is arranged below the front end of the support plate and is used to support the front end of the support plate in the Z-axis direction;

[0008] A rear support, the rear support is arranged below the rear end of the support plate and is used to support the rear end of the support plate in the Z-axis direction;

[0009] A rear-end cylinder of the support plate, the rear-end cylinder of the support plate is arranged at the rear end of the support plate, and the rear-end cylinder of the support plate is used to press the support plate tightly so that the support plate fits with the front support, and limit the support plate in the Y-axis direction;

[0010] A side cylinder of the support plate, the side cylinder of the support plate is arranged outside the second side of the support plate, and the side cylinder of the support plate is used to press the support plate tightly so that the support plate fits with the front support and the rear support, and limit the support plate in the X-axis direction;

[0011] A weld pressing device, the weld pressing device is connected with the support plate, and the weld pressing device is used to press the first side wall, the welding structure and the second side wall on the support plate.

[0012] A welding and assembling tool for a battery box body according to some embodiments of the present invention, the support plate is provided with a limiting block, a first connecting piece, a second connecting piece and a third connecting piece, the limiting block is arranged on the upper surface of the support plate and is used to limit the battery box body, the first connecting piece is arranged on the first side of the support plate, the second connecting piece is arranged on the first side of the support plate, the third connecting piece is arranged on the second side of the support plate, and the first connecting piece, the second connecting piece and the third connecting piece are all used to be connected with the weld pressing device.

[0013] A welding and assembling tool for a battery box body according to some embodiments of the present invention, the weld pressing device includes a weld front pressing component, a first weld side pressing component and a second weld side pressing component, the weld front component is connected with the support plate and is arranged above the support plate and is used to press the welding structure on the upper surface of the support plate, the first weld side pressing component is used to press the first side wall on the first side of the support plate, and the second weld side pressing component is used to press the second side wall on the second side of the support plate.

[0014] A welding and assembly tool for a battery box body according to some embodiments of the present invention. The front weld pressing assembly includes a connecting arm, two front weld pressing arms, and a plurality of front set screws. The connecting arm is an L-shaped plate. The vertical part of the connecting arm is connected to the first connecting piece, and the horizontal part of the connecting arm is respectively connected to the two front weld pressing arms. The two front weld pressing arms are respectively arranged above the first joint structure and the second joint structure. A plurality of the front set screws are arranged along the Y-axis direction of the two front weld pressing arms. Two rows of the front set screws are respectively arranged above the first joint structure and the second joint structure. The two rows of the front set screws are respectively used to press the first joint structure and the second joint structure against the upper surface of the support plate.

[0015] A welding and assembly tool for a battery box body according to some embodiments of the present invention. The first side weld pressing assembly includes a first side wall pressing arm and a first set screw. The first side wall pressing arm is connected to the second connecting piece. A plurality of the first set screws are arranged along the Y-axis direction of the first side wall pressing arm. The first set screw is used to press the first side wall against the first side of the support plate.

[0016] A welding and assembly tool for a battery box body according to some embodiments of the present invention. The second side weld pressing assembly includes a second side wall pressing arm and a second set screw. The second side wall pressing arm is connected to the third connecting piece. A plurality of the second set screws are arranged along the Y-axis direction of the second side wall pressing arm. The second set screw is used to press the second side wall against the second side of the support plate.

[0017] A welding and assembly tool for a battery box body according to some embodiments of the present invention. The vertical part of the connecting arm is connected to the first connecting piece through a connecting pin. The first side wall pressing arm is connected to the second connecting piece through a connecting pin. The second side wall pressing arm is connected to the third connecting piece through a connecting pin.

[0018] A welding and assembly tool for a battery box body according to some embodiments of the present invention. There are two side cylinders of the support plate, and the two side cylinders of the support plate are respectively arranged at the front side and the rear side of the outside of the second side of the support plate.

[0019] A welding and assembly tool for a battery box housing according to some embodiments of the present utility model. The front support includes a front support base and a covering portion connected to each other. The front support base is disposed below the front end of the support plate and is used to support the front end of the support plate in the Z-axis direction. The covering portion covers a part of the outer surface of the front end of the support plate. The covering portion includes a first facing surface, a second facing surface, and a third facing surface connected in sequence. The first facing surface faces a part of the surface of the first side of the support plate. The second facing surface faces a part of the surface of the front end of the support plate. The third facing surface faces a part of the surface of the second side of the support plate. A cylinder at the rear end of the support plate presses against the support plate to make the support plate fit with the second facing surface.

[0020] A welding and assembly tool for a battery box housing according to some embodiments of the present utility model. The rear support includes a rear support base, a fourth facing surface, and a fifth facing surface. The rear support base is disposed below the rear end of the support plate and is used to support the rear end of the support plate in the Z-axis direction. The fourth facing surface faces a part of the surface of the first side of the support plate. The fifth facing surface faces a part of the surface of the second side of the support plate. A cylinder on the side of the support plate presses against the support plate to make the support plate fit with the first facing surface and the fourth facing surface.

[0021] A welding and assembly tool for a battery box housing of the present utility model can ensure the stability of the workpiece to be welded during the welding operation. The support plate ensures the stability of the battery box housing during the welding process and avoids deformation caused by insufficient support. The front support and the rear support can perform effective limiting to ensure the accuracy of the welding position. In addition, the application of the cylinder at the rear end of the support plate and the cylinder on the side of the support plate can fasten the support plate to make the support plate fit with the front support and the rear support, further enhancing the reliability of the welding position during the welding process. By setting a weld pressing device, the front and side surfaces of the welding structure can be pressed to prevent the welding structure from having misalignment or gaps during the welding process, ensuring the welding quality. At the same time, by setting the front set screw, the first set screw, and the second set screw, the welding and assembly tool can flexibly respond to the fine adjustment of the position of the battery box housing, improving the adaptability and accuracy. In addition, the setting of the limit block effectively avoids the positioning deviation that may occur when the welding robot repeats the trial calibration, improving the efficiency and accuracy of automatic welding. Generally speaking, the welding and assembly tool of this embodiment, with its stability, precise limiting, and adjustment functions, fully guarantees the high quality and high efficiency of the welding process, improves the quality and strength of the weld, and also ensures the qualification rate of the welding cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a front view of the overall structure of a welding and assembly tool for a battery box housing according to an embodiment of the present utility model;

[0023] Figure 2 It is a reverse schematic diagram of the overall structure of a welding and assembly tooling for a battery box body in an embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the structure of a battery box body in an embodiment of the present utility model;

[0025] Figure 4 It is an enlarged schematic diagram of the structure at the limiting block in an embodiment of the present utility model;

[0026] Figure 5 It is a schematic diagram of the structure when loading parts during the use of the welding and assembly tooling for the battery box body in an embodiment of the present utility model;

[0027] Figure 6 It is a schematic diagram of the structure when the support plate is positioned during the use of the welding and assembly tooling for the battery box body in an embodiment of the present utility model;

[0028] Figure 7 It is a schematic diagram of the structure when the battery box body is positioned during the use of the welding and assembly tooling for the battery box body in an embodiment of the present utility model;

[0029] Figure 8 It is a schematic diagram of the structure when being pressed tightly during the use of the welding and assembly tooling for the battery box body in an embodiment of the present utility model;

[0030] Figure 9 It is a schematic diagram of the front sealing plate and the rear sealing plate of the battery box body in an embodiment of the present utility model;

[0031] Figure 10 It is a schematic diagram of the battery box structure in an embodiment of the present utility model.

[0032] In the figure: 1. Battery box body, 1-1. First side wall, 1-2. Welding structure, 1-21. First joint structure, 1-22. Second joint structure, 1-3. Second side wall, 1-4. Front sealing plate, 1-5. Rear sealing plate, 2. Support plate, 2-1. Limiting block, 2-2. First connecting piece, 2-3. Second connecting piece, 2-4. Third connecting piece, 3. Front end support, 3-1. Front end support base, 3-2. Wrapping part, 3-21. First facing, 3-22. Second facing, 3-23. Third facing, 4. Rear end support, 4-1. Rear end support base, 4-2. Fourth facing, 4-3. Fifth facing, 5. Support plate rear end cylinder, 6. Support plate side cylinder, 7. Weld seam pressing device, 7-1. Weld seam front pressing component, 7-11. Connecting arm, 7-12. Weld seam front pressing arm, 7-13. Front jackscrew, 7-2. First weld seam side pressing component, 7-21. First side wall pressing arm, 7-22. First jackscrew, 7-3. Second weld seam side pressing component, 7-31. Second side wall pressing arm, 7-32. Second jackscrew. Detailed implementation manners

[0033] The embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. The terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0035] A welding and assembly tooling for the battery box body of this embodiment, as Figure 1 and Figure 2 shown, is used to position and clamp the battery box body 1, as Figure 3As shown in the figure, the battery box body 1 is formed by rolling plates, stamping, bending and welding. The joint form is butt joint without beveling. The battery box body 1 includes a first side wall 1-1, a welding structure 1-2 and a second side wall 1-3 connected in sequence. The welding structure 1-2 includes a first joint structure 1-21 and a second joint structure 1-22. The first joint structure 1-21 is connected to the first side wall 1-1, and the second joint structure 1-22 is connected to the second side wall 1-3. The welding assembly tooling for the battery box body includes a support plate 2, a front support 3, a rear support 4, a rear cylinder of the support plate 5, a side cylinder of the support plate 6 and a weld pressing device 7. The support plate 2 is used to support the battery box body 1, and the welding structure 1-2 is arranged on the upper surface of the support plate 2. The front support 3 is arranged below the front end of the support plate 2 and is used to support the front end of the support plate 2 in the Z-axis direction. The rear support 4 is arranged below the rear end of the support plate 2 and is used to support the rear end of the support plate 2 in the Z-axis direction. The rear cylinder of the support plate 5 is arranged at the rear end of the support plate 2. The rear cylinder of the support plate 5 is used to press the support plate 2 tightly so that the support plate 2 fits with the front support 3, and limit the support plate 2 in the Y-axis direction. The side cylinder of the support plate 6 is arranged outside the second side of the support plate 2. The side cylinder of the support plate 6 is used to press the support plate 2 tightly so that the support plate 2 fits with the front support 3 and the rear support 4, and limit the support plate 2 in the X-axis direction. The weld pressing device 7 is connected to the support plate 2, and the weld pressing device 7 is used to press the first side wall 1-1, the welding structure 1-2 and the second side wall 1-3 tightly on the support plate 2.

[0036] It should be noted that, as a preference of this embodiment, the support plate 2 is provided with a limit block 2-1, a first connecting piece 2-2, a second connecting piece 2-3 and a third connecting piece 2-4, as Figure 4 shown. The limit block 2-1 is arranged on the upper surface of the support plate 2 and is used to limit the battery box body 1 to avoid repeated trial calibration by the welding robot. The first connecting piece 2-2 is arranged on the first side of the support plate 2, the second connecting piece 2-3 is arranged on the first side of the support plate 2, and the third connecting piece 2-4 is arranged on the second side of the support plate 2. The first connecting piece 2-2, the second connecting piece 2-3 and the third connecting piece 2-4 are all used to connect with the weld pressing device 7.

[0037] It should be noted that, as a preference of this embodiment, the weld pressing device 7 includes a front weld pressing assembly 7-1, a first side weld pressing assembly 7-2 and a second side weld pressing assembly 7-3. The front weld assembly is connected to the support plate 2 and is arranged above the support plate 2 and is used to press the welding structure 1-2 tightly on the upper surface of the support plate 2. The first side weld pressing assembly 7-2 is used to press the first side wall 1-1 tightly on the first side of the support plate 2, and the second side weld pressing assembly 7-3 is used to press the second side wall 1-3 tightly on the second side of the support plate 2.

[0038] Specifically, the front weld pressing assembly 7-1 presses the first joint structure 1-21 and the second joint structure 1-22 of the welding structure 1-2 against the upper surface of the support plate 2 above, so that there is no misalignment between the first joint structure 1-21 and the second joint structure 1-22. The front weld pressing assembly 7-1 includes a connecting arm 7-11, two front weld pressing arms 7-12, and multiple front set screws 7-13. The connecting arm 7-11 is an L-shaped plate. The vertical part of the connecting arm 7-11 is connected to the first connecting piece 2-2, and the horizontal part of the connecting arm 7-11 is respectively connected to the two front weld pressing arms 7-12. The two front weld pressing arms 7-12 are respectively arranged above the first joint structure 1-21 and the second joint structure 1-22. Multiple front set screws 7-13 are respectively arranged along the Y-axis direction of the two front weld pressing arms 7-12. Two rows of front set screws 7-13 are respectively arranged above the first joint structure 1-21 and the second joint structure 1-22. The two rows of front set screws 7-13 are respectively used to press the first joint structure 1-21 and the second joint structure 1-22 against the upper surface of the support plate 2. In addition, the two rows of front set screws 7-13 can adjust and flatten the misaligned positions. The first side weld pressing assembly 7-2 includes a first side wall pressing arm 7-21 and a first set screw 7-22. The first side wall pressing arm 7-21 is connected to the second connecting piece 2-3. Multiple first set screws 7-22 are arranged along the Y-axis direction of the first side wall pressing arm 7-21. The first set screw 7-22 is used to press the first side wall 1-1 against the first side of the support plate 2, and the first set screw 7-22 can adjust the gap position to make the first side wall 1-3 fit tightly against the first side of the support plate 2. The second side weld pressing assembly 7-3 includes a second side wall pressing arm 7-31 and a second set screw 7-32. The second side wall pressing arm 7-31 is connected to the third connecting piece 2-4. Multiple second set screws 7-32 are arranged along the Y-axis direction of the second side wall pressing arm 7-31. The second set screw 7-32 is used to press the second side wall 1-3 against the second side of the support plate 2, and the second set screw 7-32 can adjust the gap position to make the second side wall 1-3 fit tightly against the second side of the support plate 2, ensuring that the gap between the first joint structure 1-21 and the second joint structure 1-22 is within the specified range. The first set screw 7-22 and the second set screw 7-32 work together to ensure that the gap between the first joint structure 1-21 and the second joint structure 1-22 is within the specified range.

[0039] It should be noted that, as a preference of this embodiment, the vertical part of the connecting arm 7-11 can be connected to the first connecting member 2-2 through a connecting pin, the first side wall pressing arm 7-21 is connected to the second connecting member 2-3 through a connecting pin, and the second side wall pressing arm 7-31 is connected to the third connecting member 2-4 through a connecting pin. The connection through the connecting pin can not only ensure the stability of the connection between the connecting arm 7-11, the first side wall pressing arm 7-21, the second side wall pressing arm 7-31, etc. and the support plate 2, but also facilitate disassembly, improve the installation efficiency of the welding assembly tooling, and thus improve the efficiency of the overall welding process.

[0040] It should be noted that, as a preference of this embodiment, there are two side cylinders 6 of the support plate. The two side cylinders 6 of the support plate are respectively arranged on the front side and the rear side of the outside of the second side of the support plate 2. Arranging two side cylinders 6 of the support plate can not only quickly push the support plate 2 to the specified position, but also make the support plate 2 more evenly stressed because the two side cylinders 6 of the support plate are respectively arranged on the front and rear sides of the support plate 2, so that the position of the support plate 2 will not shift.

[0041] It should be noted that, as a preference of this embodiment, the front end support 3 includes a front end support base 3-1 and a covering part 3-2 which are connected to each other. The front end support base 3-1 is arranged below the front end of the support plate and is used to support the front end of the support plate 2 in the Z-axis direction. The covering part 3-2 covers a part of the outer surface of the front end of the support plate 2. The covering part 3-2 includes a first facing 3-21, a second facing 3-22 and a third facing 3-23 which are connected in sequence. The first facing 3-21 faces a part of the surface of the first side of the support plate 2, the second facing 3-22 faces a part of the surface of the front end of the support plate 2, and the third facing 3-23 faces a part of the surface of the second side of the support plate 2. The rear end cylinder 5 of the support plate presses against the support plate 2 to make the support plate 2 fit with the second facing 3-22. The rear end support 4 includes a rear end support base 4-1, a fourth facing 4-2 and a fifth facing 4-3. The rear end support base 4-1 is arranged below the rear end of the support plate 2 and is used to support the rear end of the support plate 2 in the Z-axis direction. The fourth facing 4-2 faces a part of the surface of the first side of the support plate 2, and the fifth facing 4-3 faces a part of the surface of the second side of the support plate 2. The side cylinder 6 of the support plate presses against the support plate 2 to make the support plate 2 fit with the first facing 3-21 and the fourth facing 4-2. Through the combined action of the front end support 3, the rear end support 4, the rear end cylinder 5 of the support plate and the side cylinder 6 of the support plate, the position of the support plate 2 is fixed and will not move during the welding process, affecting the welding effect of the workpiece.

[0042] In this embodiment, a method for using a welding assembly tooling for a battery box body includes the following steps:

[0043] S1. Positioning: Fix the front support 3 and the rear support 4 on the welding platform with bolts, check the positioning accuracy with a coordinate measuring machine, and fix the rear cylinder 5 of the support plate and the side cylinder 6 of the support plate at the corresponding positions;

[0044] S2. Loading the workpiece: As Figure 5 shown, assemble the un-welded battery box body 1 onto the support plate 2. After assembly, place the support plate 2 on the front support 3 and the rear support 4;

[0045] S3. Positioning of the support plate: As Figure 6 shown, first use the rear cylinder 5 of the support plate to press against the support plate 2 tightly, so that the front end of the support plate 2 is in close contact with the first contact surface 21 of the front support 3. Then use the side cylinder 6 of the support plate to press against the support plate 2 tightly, so that the support plate 2 is in close contact with the first contact surface 3-21 of the front support 3 and the fourth contact surface 4-2 of the rear support 4. Thus, the positioning of the support plate 2 is completed;

[0046] S4. Positioning of the battery box body 1: As Figure 7 shown, one end of the welding structure 1-2 of the battery box body 1 is in close contact with the limit block 2-1, and there is a machining allowance in the length direction of the weld, so this close contact is sufficient; Use a connecting pin to connect the connecting arm 7-11 of the weld front pressing component 7-1 with the first connecting piece 2-2, so that the weld front pressing arm 7-12 is above the welding structure 1-2. By adjusting the front jackscrew 7-13, make the first joint structure 1-21 and the second joint structure 1-22 respectively fit with the upper surface of the support plate 2. Thus, the positioning of the battery box body 1 is completed;

[0047] S5. Pressing: As Figure 8 shown, use a connecting pin to connect the first weld side pressing component 7-2 with the second connecting piece 2-3, so that the first side wall pressing arm 7-21 is located outside the first side wall 1-1. Use a connecting pin to connect the second weld side pressing component 7-3 with the third connecting piece 2-4, so that the second side wall pressing arm 7-31 is located outside the second side wall 1-3. First, pre-press the welding structure 1-2 by adjusting the front jackscrew 7-13 to ensure that there is no edge dislocation of the welding structure 1-2 when the first jackscrew 7-22 and the second jackscrew 7-32 are side-pressed; Secondly, adjust the first jackscrew 7-22 so that the weld position gap between the first joint structure 1-21 and the second joint structure 1-22 is within 0.02 mm; Finally, adjust the second jackscrew 7-32 to perform the final pressing on the first joint structure 1-21 and the second joint structure 1-22, ensuring that the edge dislocation amount between the first joint structure 1-21 and the second joint structure 1-22 is controlled within 0.05 mm;

[0048] S6. Welding;

[0049] S7. Lower part: After welding is completed, first loosen the front set screw 7-13, the first set screw 7-22, and the second set screw 7-32; secondly, remove all the connecting pins, and remove the front weld pressing assembly 7-1, the first side weld pressing assembly 7-2, and the second side weld pressing assembly 7-3; finally, loosen the rear cylinder 5 of the support plate and the side cylinder 6 of the support plate, remove the support plate 2, and remove the battery box body 1 after welding is completed.

[0050] S8. Machining: Machine off the excess margins on both sides of the battery box body 1.

[0051] S9. Sealing plate welding: Weld the battery box body 1 after machining with the front sealing plate 1-4 and the rear sealing plate 1-5. As Figure 9 - 10 shown, a battery box is obtained. The welding process uses laser autogenous welding with a double focus.

[0052] S10. Quality inspection: Inspect the welded product. After meeting the requirements, transfer it to the next process.

[0053] The embodiments of the present invention are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present invention and its practical application, and to enable those of ordinary skill in the art to understand the present invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A welding and assembly tooling for a battery box body, which is used to position and clamp the battery box body (1). The battery box body (1) includes a first side wall (1-1), a welding structure (1-2) and a second side wall (1-3) connected in sequence. The welding structure (1-2) includes a first joint structure (1-21) and a second joint structure (1-22). The first joint structure (1-21) is connected to the first side wall (1-1), and the second joint structure (1-22) is connected to the second side wall (1-3). It is characterized in that, including a support plate (2) for supporting the battery box body (1), and the welding structure (1-2) is arranged on the upper surface of the support plate (2); a front support (3) arranged below the front end of the support plate (2) for supporting the front end of the support plate (2) in the Z-axis direction; a rear support (4) arranged below the rear end of the support plate (2) for supporting the rear end of the support plate (2) in the Z-axis direction; a support plate rear cylinder (5) arranged at the rear end of the support plate (2), and the support plate rear cylinder (5) is used to press the support plate (2) to make the support plate (2) fit with the front support (3) to limit the support plate (2) in the Y-axis direction; a support plate side cylinder (6) arranged outside the second side of the support plate (2), and the support plate side cylinder (6) is used to press the support plate (2) to make the support plate (2) fit with the front support (3) and the rear support (4) to limit the support plate (2) in the X-axis direction; a weld pressing device (7) connected to the support plate (2), and the weld pressing device (7) is used to press the first side wall (1-1), the welding structure (1-2) and the second side wall (1-3) on the support plate (2); 2. The welding and assembly tooling for a battery box body according to claim 1, characterized in that the support plate (2) is provided with a limit block (2-1), a first connecting piece (2-2), a second connecting piece (2-3) and a third connecting piece (2-4). The limit block (2-1) is arranged on the upper surface of the support plate (2) for limiting the battery box body (1). The first connecting piece (2-2) is arranged on the first side of the support plate (2), the second connecting piece (2-3) is arranged on the first side of the support plate (2), and the third connecting piece (2-4) is arranged on the second side of the support plate (2). The first connecting piece (2-2), the second connecting piece (2-3) and the third connecting piece (2-4) are all used to connect with the weld pressing device (7); 3. The welding and assembly tooling for a battery box body according to claim 2, characterized in that, the weld pressing device (7) includes a weld front pressing assembly (7-1), a first weld side pressing assembly (7-2) and a second weld side pressing assembly (7-3). The weld front assembly is connected to the support plate (2) and arranged above the support plate (2) for pressing the welding structure (1-2) on the upper surface of the support plate (2). The first weld side pressing assembly (7-2) is used to press the first side wall (1-1) on the first side of the support plate (2), and the second weld side pressing assembly (7-3) is used to press the second side wall (1-3) on the second side of the support plate (2).

4. The welding and assembly tooling for a battery box body according to claim 3, wherein, The front weld pressing assembly (7-1) includes a connecting arm (7-11), two front weld pressing arms (7-12), and multiple front set screws (7-13). The connecting arm (7-11) is an L-shaped plate. The vertical part of the connecting arm (7-11) is connected to the first connecting member (2-2), and the horizontal part of the connecting arm (7-11) is respectively connected to the two front weld pressing arms (7-12). The two front weld pressing arms (7-12) are respectively arranged above the first joint structure (1-21) and the second joint structure (1-22). Multiple front set screws (7-13) are respectively arranged along the Y-axis direction of the two front weld pressing arms (7-12). Two rows of front set screws (7-13) are respectively arranged above the first joint structure (1-21) and the second joint structure (1-22). The two rows of front set screws (7-13) are respectively used to press the first joint structure (1-21) and the second joint structure (1-22) against the upper surface of the support plate (2).

5. A welding and assembly tooling for a battery box body according to claim 4, characterized in that, The first side weld pressing assembly (7-2) includes a first side wall pressing arm (7-21) and a first set screw (7-22). The first side wall pressing arm (7-21) is connected to the second connecting member (2-3). Multiple first set screws (7-22) are arranged along the Y-axis direction of the first side wall pressing arm (7-21). The first set screw (7-22) is used to press the first side wall (1-1) against the first side of the support plate (2).

6. A welding and assembly tooling for a battery box body according to claim 5, characterized in that, The second side weld pressing assembly (7-3) includes a second side wall pressing arm (7-31) and a second set screw (7-32). The second side wall pressing arm (7-31) is connected to the third connecting member (2-4). Multiple second set screws (7-32) are arranged along the Y-axis direction of the second side wall pressing arm (7-31). The second set screw (7-32) is used to press the second side wall (1-3) against the second side of the support plate (2).

7. The welding and assembly tooling for a battery box housing according to claim 6, wherein, The vertical part of the connecting arm (7-11) is connected to the first connecting member (2-2) through a connecting pin. The first side wall pressing arm (7-21) is connected to the second connecting member (2-3) through a connecting pin. The second side wall pressing arm (7-31) is connected to the third connecting member (2-4) through a connecting pin.

8. A welding and assembly tooling for a battery box body according to claim 7, wherein, There are two side air cylinders (6) of the support plate, and the two side air cylinders (6) of the support plate are respectively arranged on the front side and the rear side of the outside of the second side of the support plate (2).

9. A welding and assembly tooling for a battery box body according to claim 1, characterized in that, The front support (3) includes a front support base (3-1) and a covering portion (3-2) that are connected to each other. The front support base (3-1) is disposed below the front end of the support plate and is used to support the front end of the support plate (2) in the Z-axis direction. The covering portion (3-2) covers a part of the outer surface of the front end of the support plate (2). The covering portion (3-2) includes a first facing surface (3-21), a second facing surface (3-22), and a third facing surface (3-23) that are connected in sequence. The first facing surface (3-21) faces a part of the surface of the first side of the support plate (2). The second facing surface (3-22) faces a part of the surface of the front end of the support plate (2). The third facing surface (3-23) faces a part of the surface of the second side of the support plate (2). The cylinder (5) at the rear end of the support plate presses against the support plate (2) to make the support plate (2) fit with the second facing surface (3-22).

10. The welding and assembly tooling for a battery box body according to claim 9, characterized in that, The rear support (4) includes a rear support base (4-1), a fourth facing surface (4-2), and a fifth facing surface (4-3). The rear support base (4-1) is disposed below the rear end of the support plate and is used to support the rear end of the support plate (2) in the Z-axis direction. The fourth facing surface (4-2) faces a part of the surface of the first side of the support plate (2). The fifth facing surface (4-3) faces a part of the surface of the second side of the support plate (2). The cylinder (6) on the side of the support plate presses against the support plate (2) to make the support plate (2) fit with the first facing surface (3-21) and the fourth facing surface (4-2).

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