Clamp suitable for friction stir welding of new energy battery shell and water cooling plate

Abstract

The utility model relates to a clamp suitable for friction stir welding of a new energy battery shell and a water-cooling plate, which comprises a base and a supporting part arranged on the base and used for supporting a side frame of the battery shell to be welded and the water-cooling plate, and is characterized by further comprising a suction cup part comprising at least two suction cups, the suckers are distributed on the lower surface of the to-be-welded water-cooling plate at intervals and can adsorb the to-be-welded water-cooling plate to restrain the to-be-welded water-cooling plate on a preset plane; the pressing part is located on the periphery of the side frame of the battery shell and used for pressing the water cooling plate to be welded on the supporting part; and the reversible deformation part is arranged on the base, is positioned on the inner side of the side frame of the battery shell to be welded, and can prop against the long edge and the short edge of the side frame of the battery shell to prevent the side frame of the battery shell from being deformed. Therefore, the battery case is prevented from deforming in multiple directions during friction stir welding, the flatness of the whole workpiece after welding is good, and deformation is small.

Description

Technical Field

[0001] This utility model relates to the field of mechanical welding fixture manufacturing, specifically to a fixture suitable for friction stir welding of new energy battery casings and water-cooled plates. Background Technology

[0002] Stimulated by various national support policies, my country's new energy vehicle production has grown rapidly. High-quality, efficient battery casing manufacturing technology will be crucial for companies to cope with the increasingly competitive automotive market. As the carrier of the new energy battery pack, the battery casing plays a key role in the safe operation and protection of the battery modules. Its manufacturing process is complex, and quality requirements are extremely stringent. The water-cooling plate is an important component of the battery casing, playing a crucial role in cooling and sealing. During battery pack assembly, the water-cooling plate needs to be welded to the side frame of the battery casing. For example, a battery pack structure disclosed in Chinese utility model patent CN216413153U. Friction stir welding is one of the important methods and technologies for battery casing connection, and it has high requirements for materials, assembly, tooling, and processes.

[0003] The structural form of friction stir welding fixtures has become a key factor affecting battery casing production capacity and economic benefits. Due to the limitations of the welding method, it is limited to welding simple structural components, such as straight or cylindrical structures, and the workpiece must have good support or padding during the welding process.

[0004] Currently, friction stir welding of battery casings and water-cooling plates typically employs a single-point clamping method. For example, Chinese utility model patent application CN201810173612.9 discloses an "automatic welding fixture for friction stir welding," comprising a base plate, a controller, a hydraulic mechanism, a detection device, and a bracket for placing the workpiece to be welded, using the hydraulic mechanism to clamp the workpiece at a single point. However, when using this technical solution, the clamping points of the water-cooling plate clamping unit are located on both sides of the water-cooling plate, only able to clamp the two ends of the water-cooling plate, failing to prevent deformation of the middle of the water-cooling plate due to welding. Furthermore, this solution also cannot prevent deformation of the side frame of the battery casing during welding of the water-cooling plate. Therefore, further improvements are needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a clamp that can prevent deformation of the battery casing during friction stir welding in multiple directions, in light of the above-mentioned existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a fixture suitable for friction stir welding of new energy battery casings and water-cooled plates, comprising...

[0007] Base;

[0008] A support portion is provided on the base and close to the inner wall of the battery case side frame to support the battery case side frame and water cooling plate to be welded.

[0009] Its characteristic is that it further includes:

[0010] The suction cup part is disposed on the base and the inner ring of the support part, including at least two suction cups. Each of the suction cups is spaced apart on the lower surface of the water-cooled plate to be welded, and can adsorb the water-cooled plate to be welded and constrain it on a preset plane.

[0011] A clamping part is provided on the outer periphery of the side frame of the battery case to be welded, and is used to press the water-cooled plate to be welded onto the support part;

[0012] The anti-deformation part is provided on the base and located inside the side frame of the battery case to be welded. It can hold the long and short sides of the side frame of the battery case to be welded to prevent deformation.

[0013] In order to enable the suction cup part to adsorb the water-cooled plate and constrain it on a preset plane, preferably, the suction cup part includes at least two sets of suction cup mechanisms. Each set of suction cup mechanisms includes multiple suction cups and a plate. The plate is fixedly connected to the base by multiple connecting columns. The suction cups are fixedly set on the upper surface of the plate, and the water-cooled plate covers the suction cups. After the suction cups are de-aired, they can adsorb and fix the water-cooled plate. Moreover, at least two sets of suction cup mechanisms are located on the same plane to prevent the water-cooled plate from tilting or deforming.

[0014] To support the side frame of the battery case and the water-cooling plate, preferably, the support part includes a first support block. Multiple first support blocks are sequentially and fixedly arranged on the base along the inner sidewall of the long side frame of the battery case. The first support blocks are used to support the rolled edge of the side frame of the battery case and the water-cooling plate.

[0015] As one implementation structure of the anti-deformation part, preferably, the anti-deformation part includes two side-push cylinder mechanisms disposed on the base and located on the inner sides of the two long sides. The side-push cylinder mechanism includes a first cylinder and a side-push block connected to the cylinder rod of the first cylinder. A through groove is provided on the first support block corresponding to the side-push block. When the first cylinder is in the air intake state, the cylinder rod extends and drives the side-push block to extend out of the through groove, thereby pressing the inner sidewall of the long side.

[0016] In order to hold the short side of the battery case side frame, preferably, the anti-deformation part includes two guide rail mechanisms disposed on the base and located within the two short sides of the battery case side frame. The guide rail mechanism includes a second cylinder, a guide rail, and a support plate. The second cylinder and the guide rail are disposed on the base, and a slidable support plate is disposed on the guide rail. The support plate is connected to the cylinder rod of the second cylinder to move on the guide rail. The support plate is provided with at least two second support blocks. The second support blocks are disposed along the short side of the battery case side frame and are thus driven by the second cylinder to press against the inner sidewall of the short side.

[0017] In order to limit the battery case to a preset placement position during loading, preferably, at least two limiting plates are provided on the base at the outer periphery of the preset placement position on the side frame of the battery case. Each limiting plate can be used to hold the battery case in place during loading.

[0018] To determine the orientation of the battery case side frame and the water-cooling plate during loading, a positioning part is preferably provided at the corner of the corresponding battery case frame. The positioning part includes a positioning cylinder, a connecting block, and a positioning pin. The positioning pin is fixedly connected to the positioning cylinder through the connecting block, and the positioning cylinder can drive the positioning pin to extend, thereby cooperating with the positioning holes on the battery case to determine the orientation of the battery case side frame and the water-cooling plate.

[0019] As one implementation structure of the pressing part, preferably, the pressing part is provided with at least two hydraulic cylinder pressing mechanisms, including hydraulic cylinders, a linkage mechanism disposed on the hydraulic cylinders, and a pressing block connected to the free end of the linkage mechanism. The hydraulic cylinders can drive the hydraulic rods to extend and drive the linkage mechanism to move, so that the linkage mechanism can drive the pressing block to press the water-cooled plate.

[0020] This utility model has the following advantages: by setting the anti-deformation part and the suction cup part, it can ensure that the water-cooled plate is completely attached to the frame. In particular, the suction cup part can fix and constrain the water-cooled plate on a plane, thereby preventing the battery shell from deforming during friction stir welding in multiple directions. The overall flatness of the workpiece after welding is better and the deformation is smaller. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure during material feeding in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure when the battery casing and water cooling plate are removed in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of this utility model when the battery casing, water cooling plate and suction cup structure are removed;

[0024] Figure 4This is a cross-sectional view at one angle during material loading in an embodiment of this utility model;

[0025] Figure 5 This is a cross-sectional view from another angle during the feeding process in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the suction cup mechanism in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the positioning part in an embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the side-push cylinder mechanism in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the guide rail mechanism in an embodiment of the present utility model;

[0030] Figure 10 for Figure 3 Enlarged view of point A in the middle.

[0031] Labels: 1. Base, 2. Side frame, 21. Rolled edge, 22. Long side, 23. Short side, 3. Water-cooled plate, 41. First support block, 411. Through groove, 42. Second support block, 5. Suction cup mechanism, 51. Suction cup, 52. Flat plate, 521. Connecting column, 6. Hydraulic cylinder pressing mechanism, 61. Hydraulic cylinder, 62. Linkage mechanism, 63. Pressing block, 7. Side push cylinder mechanism, 71. First cylinder, 72. Side push block, 8. Guide rail mechanism, 81. Second cylinder, 82. Guide rail, 83. Support plate, 9. Limiting plate, 10. Positioning part, 101. Positioning cylinder, 102. Connecting block, 103. Positioning pin. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-3 The diagram shows the preferred embodiment of this utility model. This embodiment describes a fixture suitable for friction stir welding of a new energy battery casing and a water-cooled plate, comprising a base 1, a support portion, a suction cup portion, a clamping portion, and an anti-deformation portion. The tooling configuration of the battery casing side frame 2 and the water-cooled plate 3 is as shown. Figure 1 As shown.

[0034] The support section includes a first support block 41 and a second support block 42 mounted on the base 1, with each support block close to the inner wall of the battery casing side frame 2. Multiple first support blocks 41 are sequentially arranged on the base 1 along the inner wall of the long side 22 of the battery casing side frame 2. These first support blocks 41 support the rolled edge 21 and water-cooling plate 3 of the side frame 2 and are fixed to the base 1 by pins and bolts. The second support blocks 42 are located in the anti-deformation section.

[0035] like Figure 2 , Figure 6 As shown, the suction cup section includes at least two sets of suction cup mechanisms 5, which are disposed on the base 1 and the inner ring of the support section. Each set of suction cup mechanism 5 includes multiple suction cups 51 and a flat plate 52. The flat plate 52 is fixedly connected to the base 1 by multiple connecting posts 521. The suction cups 51 are fixedly disposed on the upper surface of the flat plate 52, and the water-cooled plate 3 covers the suction cups 51. After the suction cups 51 are de-aired, they can adsorb and fix the water-cooled plate 3 to be welded. At least two sets of suction cup mechanisms 5 are located on the same plane. The suction cups 51 are distributed at intervals on the lower surface of the water-cooled plate 3. For example, the water-cooled plate 3 is evenly divided into multiple areas, and a suction cup 51 is correspondingly disposed in each area, thereby preventing the water-cooled plate 3 from tilting or deforming. This ensures that the water-cooled plate 3 is completely attached to the side frame 2, and the flatness after welding is good.

[0036] like Figures 1-3 , Figure 5 , Figure 10 As shown, in this embodiment, the clamping part is a plurality of hydraulic cylinder clamping mechanisms 6 disposed on the outer periphery of the side frame 2 of the battery case. The hydraulic cylinder clamping mechanism 6 includes a hydraulic cylinder 61, a linkage mechanism 62 disposed on the hydraulic cylinder 61, and a clamping block 63 connected to the free end of the linkage mechanism 62. When the hydraulic cylinder 61 is activated, the hydraulic rod extends and drives the linkage mechanism 62 to move, and the linkage mechanism 62 then drives the clamping block 63 to clamp the water cooling plate 3.

[0037] like Figure 3 , Figure 4 , Figure 8 , Figure 9 and Figure 10 As shown, the anti-deformation part includes two side-push cylinder mechanisms 7 disposed on the base 1 and located inside the two long sides 22, and two guide rail mechanisms 8 disposed within the two short sides 23 of the battery casing side frame 2. The side-push cylinder mechanism 7 includes a first cylinder 71 and a side-push block 72. A through groove 411 is provided on the first support block 41 corresponding to the side-push block 72. When the first cylinder 71 is inlet, the cylinder rod extends and drives the side-push block 72 to extend outward of the through groove 411, thereby pressing against the inner wall of the long side 22, that is, applying an outward thrust to press the long side 22, thereby preventing the long side 22 from welding deformation. The guide rail mechanism 8 includes a second cylinder 81, a guide rail 82, and a support plate 83. The second cylinder 81 and the guide rail 82 are disposed on the base 1, and a slidable support plate 83 is disposed on the guide rail 82. Several second support blocks 42 are disposed on the support plate 83. The support plate 83 can be moved on the guide rail 82 by the second cylinder 81, so that the second support block 42 can press against the inner wall of the short side 23, thereby preventing the short side 23 from deforming.

[0038] In addition, such as Figure 1 , Figure 3 , Figure 5As shown, several limiting plates 9 are provided on the base 1 and on the outer periphery of the preset placement position on the side frame 2 of the battery case. These plates can hold the battery case in place at the preset placement position during loading.

[0039] like Figure 1 , Figure 2 , Figure 7 As shown, a positioning part 10 is also provided on the base, located at the corner of the corresponding battery housing frame, including a positioning cylinder 101, a connecting block 102, and a positioning pin 103. The positioning pin 103 is fixedly connected to the positioning cylinder 101 through the connecting block 102. The positioning cylinder 101 can drive the positioning pin 103 to extend, which, in conjunction with the positioning hole on the battery housing, determines the direction of the side frame 2 of the battery housing and the water cooling plate 3 during material loading.

[0040] In use, the cylinder rod of the positioning cylinder 101 drives the positioning pin 103 to extend, and then the material is loaded, that is, the side frame 2 of the battery case and the water-cooled plate 3 are placed in the predetermined placement position. The suction cup mechanism 5 draws air and sucks the water-cooled plate 3 tightly. The hydraulic cylinder 61 drives the hydraulic rod to extend, which drives the linkage mechanism 62 and the pressing block 63 to press the water-cooled plate 3 onto the side frame 2. The first cylinder 71 is air-intaken, the cylinder rod extends, and drives the side push block 72 to press the side wall of the long side 22 of the housing. The second cylinder 81 is air-intaken, the cylinder rod extends, which drives the support plate 83 and the second support block 42 to press the short side 23 tightly.

[0041] After welding is completed, stop the operation of the first cylinder 71, the second cylinder 81 and the hydraulic cylinder 61, eliminate the suction of the suction cup 51, and retract the positioning pin 103 before unloading.

Claims

1. A fixture suitable for friction stir welding of new energy battery casings and water-cooled plates, comprising: Base (1); The support is provided on the base (1) and close to the inner wall of the battery case side frame (2) for supporting the battery case side frame (2) and the water cooling plate (3) to be welded. Its characteristic is that it further includes: The suction cup part is provided on the base (1) and the inner ring of the support part, including at least two suction cups (51). Each of the suction cups (51) is spaced apart on the lower surface of the water-cooled plate (3) to be welded, and can adsorb the water-cooled plate (3) to be welded and constrain it on a preset plane. A pressing part is provided on the outer periphery of the side frame (2) of the battery case to be welded, and is used to press the water cooling plate (3) to be welded onto the support part; The anti-deformation part is provided on the base (1) and located inside the side frame (2) of the battery case to be welded. It can hold the long side (22) and short side (23) of the side frame (2) of the battery case to be welded to prevent it from deforming.

2. The clamp according to claim 1, characterized in that: The suction cup part includes at least two sets of suction cup mechanisms (5). Each set of suction cup mechanism (5) includes multiple suction cups (51) and a plate (52). The plate (52) is fixedly connected to the base (1) by multiple connecting columns (521). The suction cups (51) are fixedly set on the upper surface of the plate (52), and the water-cooled plate (3) covers the suction cups (51). After the suction cups (51) are de-aired, they can adsorb and fix the water-cooled plate (3). At least two sets of suction cup mechanisms (5) are located on the same plane to prevent the water-cooled plate (3) from tilting or deforming.

3. The clamp according to claim 2, characterized in that: The support includes a first support block (41). Multiple first support blocks (41) are fixedly arranged sequentially on the inner sidewall of the long side (22) of the battery case side frame (2) on the base (1). The first support block (41) is used to support the rolled edge (21) and water cooling plate (3) of the battery case side frame (2).

4. The clamp according to claim 3, characterized in that: The anti-deformation part includes two side-push cylinder mechanisms (7) disposed on the base (1) and located inside the two long sides (22). The side-push cylinder mechanism (7) includes a first cylinder (71) and a side-push block (72) connected to the cylinder rod of the first cylinder (71). A through groove (411) is provided on the first support block (41) corresponding to the side-push block (72). When the first cylinder (71) is in the air intake state, the cylinder rod extends and drives the side-push block (72) to extend out of the through groove (411), thereby pressing the inner wall of the long side (22).

5. The clamp according to claim 4, characterized in that: The anti-deformation part includes two guide rail mechanisms (8) disposed on the base (1) and located within the two short sides (23) of the battery case side frame (2). The guide rail mechanism (8) includes a second cylinder (81), a guide rail (82) and a support plate (83). The second cylinder (81) and the guide rail (82) are disposed on the base (1), and a sliding support plate (83) is disposed on the guide rail (82). The support plate (83) is connected to the cylinder rod of the second cylinder (81) to move on the guide rail (82). At least two second support blocks (42) are provided on the support plate (83). The second support blocks (42) are disposed along the short side (23) of the battery case side frame (2) and are driven by the second cylinder (81) to press against the inner wall of the short side (23).

6. The clamp according to any one of claims 1 to 5, characterized in that: At least two limiting plates (9) are provided on the outer periphery of the preset placement position on the side frame (2) of the battery case on the base (1). Each limiting plate (9) can be used to hold the battery case in place during loading.

7. The clamp according to claim 6, characterized in that: A positioning part (10) is also provided at the corner of the corresponding battery casing frame. The positioning part (10) includes a positioning cylinder (101), a connecting block (102) and a positioning pin (103). The positioning pin (103) is fixedly connected to the positioning cylinder (101) through the connecting block (102), and the positioning cylinder (101) can drive the positioning pin (103) to extend, thereby cooperating with the positioning hole on the battery casing to determine the direction of the side frame (2) of the battery casing and the water cooling plate (3).

8. The clamp according to any one of claims 1 to 5, characterized in that: The pressing part is provided with at least two hydraulic cylinder pressing mechanisms (6), including a hydraulic cylinder (61), a linkage mechanism (62) set on the hydraulic cylinder (61), and a pressing block (63) connected to the free end of the linkage mechanism (62). The hydraulic cylinder (61) can drive the hydraulic rod to extend and drive the linkage mechanism (62) to move, so that the linkage mechanism (62) can drive the pressing block (63) to press the water cooling plate.

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