A large-size battery box shell multi-station stamping forming device and forming process

Abstract

This invention discloses a multi-station stamping forming device and forming process for a large-size battery box shell, relating to the technical field of stamping forming. The shell contains a clamping assembly and a driving device used in conjunction with it. When the workpiece needs to be moved, a hydraulic telescopic rod extends, driving a mounting plate to move. The mounting plate brings the clamping assembly closer to the workpiece, while a gear moves along a rack, causing it to rotate. This rotation drives a rotating shaft, and each set of threads on the outer wall of the shaft moves two threaded seats, bringing the clamping plates on the outer wall of the threaded seats closer to both sides of the workpiece and clamping them. The driving device then moves the workpiece to the next process, thus completing the continuous processing steps. Furthermore, the mold assembly of this device is configured according to each processing step, with each mold processing the workpiece sequentially according to the process order, thereby completely forming the large-size battery box shell.

Description

Technical Field

[0001] This invention relates to the technical field of stamping, and in particular to a multi-station stamping device and process for large-size battery box housings. Background Technology

[0002] Large-size battery box housings refer to the external structural components of power battery packs in new energy vehicles, typically with a length ≥1.5 meters, a width ≥1 meter, and a depth of 0.1~0.3 meters. They are used to support and protect battery modules, cooling systems, and electrical components, and must possess high strength, good sealing, and vibration resistance. Common materials are high-strength steel or aluminum alloy, and the shape is often a deep box-like structure with reinforcing ribs.

[0003] Currently, large-size battery box casings are generally manufactured using a single-process, independent processing model: after completing one process, the workpiece needs to be transferred to the next press manually or using simple machinery. This model not only results in a dispersed equipment layout and a large footprint, but also relies heavily on manual operation, significantly increasing manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-station stamping forming device and forming process for large-size battery box housings in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a housing for a stamping device for stamping large-size battery box housings, wherein a clamping assembly and a driving device for use therewith are installed inside the housing, an upper mold is installed at the upper end of the housing, a lower mold is installed at the lower end of the housing, and conveyor belts are respectively provided at both ends of the housing;

[0006] The clamping assembly includes a connecting plate fixedly connected to the second square block. Hydraulic telescopic rods are respectively installed at both ends of the connecting plate. An installation plate is fixedly installed at the telescopic end of the hydraulic telescopic rod. A rotating shaft is rotatably provided on the outer wall of the installation plate. Multiple clamping groups are threadedly connected to the outer wall of the rotating shaft. Multiple racks are fixedly provided on the outer wall of the connecting plate. A gear is fixedly provided on the outer wall of the rotating shaft between each clamping group. The gear meshes with the rack.

[0007] The clamping assembly includes two mirror-arranged threaded seats. A clamping plate is fixedly provided on the outer wall of the threaded seats. An anti-slip pad is provided at the position where the clamping plate contacts the workpiece. Multiple sets of threaded groups are opened on the outer wall of the rotating shaft. Each set of threaded groups is provided with two threaded segments with opposite directions that are used to engage the threaded seats. The position of each set of threaded seats can be adjusted according to actual needs.

[0008] In practical applications, when the workpiece needs to be moved, the hydraulic telescopic rod extends, driving the mounting plate to move. The mounting plate brings the clamping assembly closer to the workpiece, and simultaneously, the gear moves along the rack, causing the gear to rotate. The gear then drives the rotating shaft to rotate, and each set of threads on the outer wall of the rotating shaft drives two threaded seats to move, bringing the clamping plates on the outer wall of the threaded seats closer to both sides of the workpiece and clamping them. Subsequently, the workpiece is moved to the next process by the drive device, thus completing the continuous processing steps. Moreover, the mold assembly of this device is configured with corresponding molds according to each processing technology, and each mold processes the workpiece sequentially according to the process sequence, thereby completely completing the forming of the large-size battery box shell.

[0009] Furthermore, the driving device includes a mounting bracket fixedly installed inside the housing and a connecting shaft penetrating the bottom of the housing. One end of the connecting shaft is connected to the output shaft of the motor, and the other end of the connecting shaft is rotatably connected to the housing. Sprockets are fixedly installed at both ends of the connecting shaft. A chain is sleeved on the outer wall of each sprocket. A rotating ring is meshed with the other end of the chain. A sliding rod is fixedly installed inside the rotating ring. The middle position of the sliding rod is rotatably connected to the mounting bracket. A sliding block is slidably installed on the outer wall of the sliding rod. A groove for cooperating with the sliding block is opened on the outer wall of the mounting bracket. A first square block is slidably installed on the outer wall of the mounting bracket. A second square block is slidably installed on the outer wall of the first square block. The sliding directions of the mounting bracket and the first square block and the sliding directions of the first square block and the second square block are perpendicular to each other. A C-shaped connecting rod is fixedly installed at the middle position of the second square block. The middle position of the C-shaped connecting rod is rotatably connected to the sliding block.

[0010] The mounting bracket has a rectangular block in the middle. The first square block, the second square block, and the rectangular block are the same size. A connecting rod is fixedly installed at the top corner of the rectangular block. A fixing post is fixedly installed at the end of the connecting rod. The fixing post is fixedly connected to the outer shell.

[0011] The slide is rectangular, and the top corners of the slide are chamfered.

[0012] The slider component includes a slider block that is slidably connected to the slider rod, one end of the slider block is rotatably connected to a rotating cylinder, and the other end of the slider block is fixedly provided with a fixed shaft;

[0013] In practical applications, when the clamping assembly needs to be moved, the motor is started. The motor's output shaft drives the connecting shaft to rotate forward, which in turn drives two sprockets to move. The sprockets drive a rotating ring to rotate via a chain, which in turn drives a sliding rod to move. The sliding rod then drives a slider to move along a groove, which in turn drives a C-shaped connecting rod to move. The C-shaped connecting rod then drives a second square block to move, which in turn drives a connecting plate to move, thus moving the workpiece to the next process. After the workpiece has moved to the next process, the motor's output shaft drives the connecting shaft to rotate in reverse, thus returning the clamping assembly to its previous position.

[0014] A multi-station stamping process for large-size battery box housings includes the following steps:

[0015] A: Blanking / preforming involves punching the blank out of the shell from the coil and unfolding the blank, while simultaneously pressing out process bumps or cuts to improve material flow, in preparation for deep drawing;

[0016] B: Deep drawing, stretching the blank into a box-shaped body, controlling the edge clamping force and lubrication to avoid corner cracking and side wall wrinkling, and ensuring that the depth and rounded corners meet the standards;

[0017] C: Trimming, removing process waste around the shell after deep drawing to make the opening edge neat and ensure the reference accuracy for subsequent positioning and assembly;

[0018] D: Punching: Punching mounting holes, positioning holes, etc., on the bottom or side wall of the housing. Pay attention to the hole edge distance and punching clearance to prevent deformation around the hole.

[0019] E: Shaping, correcting the flatness of the bottom surface, the springback of the side walls and the shape of the rounded corners, and ensuring the stability of the shell dimensions through bending compensation and partitioned pressing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] When the workpiece needs to be moved, the hydraulic telescopic rod extends, which drives the mounting plate to move. The mounting plate brings the clamping assembly closer to the workpiece, and the gear moves along the rack, causing the gear to rotate. The gear drives the rotating shaft to rotate, and each set of threads on the outer wall of the rotating shaft drives two threaded seats to move, bringing the clamping plate on the outer wall of the threaded seats closer to both sides of the workpiece and clamping it. Then, the workpiece is moved to the next process by the drive device, thus completing the continuous processing process. Moreover, the mold assembly of this device is configured with corresponding molds according to each processing technology. Each mold processes the workpiece in sequence according to the process sequence, thus completing the forming of the large-size battery box shell.

[0022] When it is necessary to move the clamping assembly, start the motor. The motor's output shaft drives the connecting shaft to rotate forward. The connecting shaft drives the two sprockets to move. The sprockets drive the rotating ring to rotate via the chain. The rotating ring drives the sliding rod to move. The sliding rod drives the slider to move along the slide groove. In turn, the slider drives the C-shaped connecting rod to move. The C-shaped connecting rod drives the second square block to move. The second square block drives the connecting plate to move, thereby moving the workpiece to the next process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the outer shell proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the clamping component structure proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the drive device structure proposed in this invention;

[0027] Figure 5 This is a schematic diagram of the first square block structure proposed in this invention;

[0028] Figure 6 This is a schematic diagram of the slider structure proposed in this invention;

[0029] Figure 7 This is a schematic diagram of the clamping assembly structure proposed in this invention.

[0030] In the diagram: 1. Outer shell; 2. Clamping assembly; 201. Connecting plate; 202. Hydraulic telescopic rod; 203. Mounting plate; 204. Rack; 205. Gear; 206. Clamping group; 2061. Threaded seat; 2062. Clamping plate; 207. Rotating shaft; 3. Drive device; 301. Connecting shaft; 302. Sprocket; 303. Motor; 304. Chain; 305. Rotating ring; 306. Slide rod; 307. Sliding block; 3071. Sliding block; 3072. Fixed shaft; 3073. Rotating cylinder; 308. Mounting bracket; 3081. Slide groove; 309. Second square block; 310. C-shaped connecting rod; 311. First square block; 4. Upper mold; 5. Lower mold. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Reference Figure 1-7 A multi-station stamping forming device and forming process for a large-size battery box shell includes a shell 1 for stamping a stamping device for stamping a large-size battery box shell, a clamping assembly 2 and a driving device 3 used in conjunction with the shell 1 are installed inside the shell 1, an upper mold 4 is installed at the upper end of the shell 1, a lower mold 5 is installed at the lower end of the shell 1, and conveyor belts are respectively provided at both ends of the shell 1.

[0034] The clamping assembly 2 includes a connecting plate 201 fixedly connected to the second square block 309. Hydraulic telescopic rods 202 are respectively installed at both ends of the connecting plate 201. An installation plate 203 is fixedly installed at the telescopic end of the hydraulic telescopic rods 202. A rotating shaft 207 is rotatably provided on the outer wall of the installation plate 203. Multiple clamping groups 206 are threadedly connected to the outer wall of the rotating shaft 207. Multiple racks 204 are fixedly provided on the outer wall of the connecting plate 201. A gear 205 is fixedly provided on the outer wall of the rotating shaft 207 between each clamping group 206. The gear 205 meshes with the rack 204.

[0035] The clamping assembly 206 includes two mirror-arranged threaded seats 2061. A clamping plate 2062 is fixedly mounted on the outer wall of the threaded seat 2061. An anti-slip pad is provided at the position where the clamping plate 2062 contacts the workpiece. Multiple sets of threaded groups are opened on the outer wall of the rotating shaft 207. Each set of threaded groups is provided with two threaded segments with opposite directions that are used to engage with the threaded seats 2061. The position of each set of threaded seats 2061 can be adjusted according to actual needs.

[0036] In practical applications, when the workpiece needs to be moved, the hydraulic telescopic rod 202 extends, driving the mounting plate 203 to move. The mounting plate 203 brings the clamping assembly 206 closer to the workpiece. At the same time, the gear 205 moves along the rack 204, causing the gear 205 to rotate. The gear 205 drives the rotating shaft 207 to rotate. Each set of threads on the outer wall of the rotating shaft 207 drives two threaded seats 2061 to move, causing the clamping plate 2062 on the outer wall of the threaded seats 2061 to move closer to both sides of the workpiece and clamp it. Then, the workpiece is moved to the next process by the drive device 3, thus completing the continuous processing process. Moreover, the mold assembly of this device is configured with corresponding molds according to each processing technology. Each mold processes the workpiece in sequence according to the process order, thus completing the forming of the large-size battery box shell.

[0037] Furthermore, the drive device 3 includes a mounting bracket 308 fixedly installed inside the housing 1 and a connecting shaft 301 penetrating the bottom of the housing 1. One end of the connecting shaft 301 is connected to the output shaft of the motor 303, and the other end of the connecting shaft 301 is rotatably connected to the housing 1. Sprockets 302 are fixedly installed at both ends of the connecting shaft 301. A chain 304 is sleeved on the outer wall of the sprocket 302. A rotating ring 305 is meshed with the other end of the chain 304. A slide rod 306 is fixedly installed inside the rotating ring 305. The middle position of the slide rod 306 is rotatably connected to the mounting bracket 308. The outer wall of the 06 is slidably provided with a slider 307, and the outer wall of the mounting bracket 308 is provided with a groove 3081 for use with the slider 307. The outer wall of the mounting bracket 308 is slidably provided with a first square block 311, and the outer wall of the first square block 311 is slidably provided with a second square block 309. The sliding direction of the mounting bracket 308 and the first square block 311 and the sliding direction of the first square block 311 and the second square block 309 are perpendicular to each other. A C-shaped connecting rod 310 is fixedly provided at the middle position of the second square block 309, and the middle position of the C-shaped connecting rod 310 is rotatably connected to the slider 307.

[0038] The mounting bracket 308 has a rectangular block in the middle. The first square block 311 and the second square block 309 are the same size as the rectangular block. A connecting rod is fixedly installed at the top corner of the rectangular block, and a fixing post is fixedly installed at the end of the connecting rod. The fixing post is fixedly connected to the outer shell 1.

[0039] The slide 3081 is rectangular, and the top corners of the slide 3081 are chamfered;

[0040] The slider component 307 includes a slider block 3071 that is slidably connected to the slider 306. One end of the slider block 3071 is rotatably connected to a rotating cylinder 3073, and the other end of the slider block 3071 is fixedly provided with a fixed shaft 3072.

[0041] In practical applications, when it is necessary to move the clamping assembly 2, the motor 303 is started. The output shaft of the motor 303 drives the connecting shaft 301 to rotate forward. The connecting shaft 301 drives the two sprockets 302 to move. The sprockets 302 drive the rotating ring 305 to rotate via the chain 304. The rotating ring 305 drives the slide rod 306 to move. The slide rod 306 drives the slider 307 to move along the slide groove 3081. Thus, the slider 307 drives the C-shaped connecting rod 310 to move. The C-shaped connecting rod 310 drives the second square block 309 to move. The second square block 309 drives the connecting plate 201 to move, thereby moving the workpiece to the next process. After the workpiece is moved to the next process, the output shaft of the motor 303 drives the connecting shaft 301 to rotate in reverse, thereby returning the clamping assembly 2 to its previous position.

[0042] A multi-station stamping process for large-size battery box housings includes the following steps:

[0043] A: Blanking / preforming involves punching the blank out of the shell from the coil and unfolding the blank, while simultaneously pressing out process bumps or cuts to improve material flow, in preparation for deep drawing;

[0044] B: Deep drawing, stretching the blank into a box-shaped body, controlling the edge clamping force and lubrication to avoid corner cracking and side wall wrinkling, and ensuring that the depth and rounded corners meet the standards;

[0045] C: Trimming, removing process waste around the shell after deep drawing to make the opening edge neat and ensure the reference accuracy for subsequent positioning and assembly;

[0046] D: Punching: Punching mounting holes, positioning holes, etc., on the bottom or side wall of the housing. Pay attention to the hole edge distance and punching clearance to prevent deformation around the hole.

[0047] E: Shaping, correcting the flatness of the bottom surface, the springback of the side walls and the shape of the rounded corners, and ensuring the stability of the shell dimensions through bending compensation and partitioned pressing.

[0048] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-station stamping forming device for large-size battery box shells, characterized in that, The device includes a housing (1) for stamping a large-size battery box housing. Inside the housing (1) is a clamping assembly (2) and a drive device (3) used in conjunction with it. An upper mold (4) is installed at the upper end of the housing (1), a lower mold (5) is installed at the lower end of the housing (1), and conveyor belts are respectively provided at both ends of the housing (1). The clamping assembly (2) includes a connecting plate (201) connected to the driving device (3). Hydraulic telescopic rods (202) are respectively installed at both ends of the connecting plate (201). An installation plate (203) is fixedly installed at the telescopic end of the hydraulic telescopic rods (202). A rotating shaft (207) is rotatably provided on the outer wall of the installation plate (203). Multiple clamping groups (206) are threadedly connected to the outer wall of the rotating shaft (207). Multiple racks (204) are fixedly provided on the outer wall of the connecting plate (201). A gear (205) is fixedly provided on the outer wall of the rotating shaft (207) between each clamping group (206). The gear (205) meshes with the rack (204).

2. The multi-station stamping forming device for a large-size battery box shell according to claim 1, characterized in that, The drive device (3) includes a mounting bracket (308) fixedly installed inside the housing (1) and a connecting shaft (301) penetrating the bottom of the housing (1). The end of the connecting shaft (301) is connected to the output shaft of the motor (303), and the other end of the connecting shaft (301) is rotatably connected to the housing (1). Sprockets (302) are fixedly installed at both ends of the connecting shaft (301). A chain (304) is sleeved on the outer wall of the sprocket (302). A rotating ring (305) is meshed with the other end of the chain (304). A slide rod (306) is fixedly installed inside the rotating ring (305). The middle position of the slide rod (306) is rotatably connected to the mounting bracket (308). A slider (307) is slidably provided on the outer wall of the slide rod (306). A groove (3081) for use with the slider (307) is provided on the outer wall of the mounting frame (308). A first square block (311) is slidably provided on the outer wall of the mounting frame (308). A second square block (309) is slidably provided on the outer wall of the first square block (311). The sliding direction of the mounting frame (308) and the first square block (311) and the sliding direction of the first square block (311) and the second square block (309) are perpendicular to each other. A C-shaped connecting rod (310) is fixedly provided at the middle position of the second square block (309). The middle position of the C-shaped connecting rod (310) is rotatably connected to the slider (307).

3. The multi-station stamping forming device for large-size battery box housing according to claim 1, characterized in that, The clamping assembly (206) includes two mirror-arranged threaded seats (2061). A clamping plate (2062) is fixedly provided on the outer wall of the threaded seat (2061). An anti-slip pad is provided at the position where the clamping plate (2062) contacts the workpiece. Multiple sets of threaded groups are opened on the outer wall of the rotating shaft (207). Each set of threaded groups is provided with two threaded segments with opposite directions that are used by the threaded seats (2061).

4. The multi-station stamping forming device for large-size battery box housing according to claim 2, characterized in that, The mounting bracket (308) has a rectangular block in the middle. The first square block (311), the second square block (309) and the rectangular block have the same size. A connecting rod is fixedly installed at the top corner of the rectangular block. A fixing post is fixedly installed at the end of the connecting rod. The fixing post is fixedly connected to the outer shell (1).

5. The multi-station stamping forming device for a large-size battery box shell according to claim 2, characterized in that, The slide (3081) is rectangular, and the top corner of the slide (3081) is chamfered.

6. The multi-station stamping forming device for a large-size battery box shell according to claim 2, characterized in that, The slider (307) includes a slider block (3071) that is slidably connected to the slider (306). One end of the slider block (3071) is rotatably connected to a rotating cylinder (3073), and the other end of the slider block (3071) is fixedly provided with a fixed shaft (3072).

7. The multi-station stamping forming process for a large-size battery box shell according to claim 1, characterized in that, Includes the following steps: A: Blanking / preforming involves punching the blank out of the shell from the coil and unfolding the blank, while simultaneously pressing out process bumps or cuts to improve material flow, in preparation for deep drawing; B: Deep drawing, stretching the blank into a box-shaped body, controlling the edge clamping force and lubrication to avoid corner cracking and side wall wrinkling, and ensuring that the depth and rounded corners meet the standards; C: Trimming, removing process waste around the shell after deep drawing to make the opening edge neat and ensure the reference accuracy for subsequent positioning and assembly; D: Punching: Punching mounting holes, positioning holes, etc., on the bottom or side wall of the housing. Pay attention to the hole edge distance and punching clearance to prevent deformation around the hole. E: Shaping, correcting the flatness of the bottom surface, the springback of the side walls and the shape of the rounded corners, and ensuring the stability of the shell dimensions through bending compensation and partitioned pressing.

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