Bending die and bending equipment
By designing a bending die with an angle greater than 90 degrees between the clamping surface and the shaping surface, and combining it with a drive component and an elastic reset component, the problems of inaccurate angles and low efficiency in copper busbar bending were solved, achieving efficient and precise workpiece forming.
Patent Information
- Application Number
- CN202520269392.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-19
AI Technical Summary
During the processing of existing copper busbar bending dies, the springback of the workpiece material causes inaccurate bending angles, requiring multiple adjustments, resulting in low production efficiency and an inability to achieve the expected angle in one go, especially for angles greater than 90 degrees.
A bending die was designed, which adopts a structure in which the included angle between the first clamping surface and the shaping surface is greater than 90 degrees. Combined with the driving component and the pressing block, the bending angle of the workpiece is slightly greater than the required angle. The elastic reset component is used to adjust the springback and reduce the number of bending times.
It improves the efficiency of workpiece bending and forming, reduces the need for multiple adjustments, improves product consistency and precision, and extends the service life of molds.
Smart Images
Figure CN223761820U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of processing equipment, and in particular to a bending die and bending equipment. Background Technology
[0002] Bending technology is a process widely used in the electrical, construction, and mechanical manufacturing fields. This technology mainly involves bending plate-shaped workpieces such as copper busbars at specific angles or curvatures to adapt to different engineering needs, providing a reliable guarantee for the safe and stable operation of power equipment.
[0003] Currently, in the copper busbar production process, the workpiece generally needs to be bent to 90 degrees. The angle between the clamping surface and the positioning surface of the conventional mold is a fixed 90 degrees. When bending, the workpiece is first bent at 45 degrees and then bent to 90 degrees. The bending process is cumbersome. Moreover, since the material of the workpiece often has a springback, the bending angle of the workpiece cannot reach the expected value, and the workpiece cannot meet the production requirements. Multiple bending adjustments or the use of shims and other tools for adjustment are required, resulting in low production efficiency. Utility Model Content
[0004] The purpose of this utility model embodiment is to provide a bending die and bending equipment, wherein the bending die can improve the efficiency of workpiece bending and forming.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] On the one hand, a bending die is provided, comprising:
[0007] A first base is provided with an extrusion groove; the first base has a first clamping surface and a shaping surface located within the extrusion groove;
[0008] The push block is slidably mounted on the first base and located within the extrusion groove;
[0009] The second base has a second clamping surface;
[0010] as well as
[0011] A drive assembly is movably mounted on the second base to drive the push block toward or away from the shaping surface; the push block is located on the movement path of the drive assembly.
[0012] A clamping gap is formed between the first clamping surface and the second clamping surface. The first clamping surface is connected to the shaping surface. The first clamping surface is parallel to the sliding direction of the pushing block. The shaping surface is located on the sliding path of the pushing block and is inclined in a direction away from the pushing block. The angle between the first clamping surface and the shaping surface is an obtuse angle.
[0013] Optionally, the bending die further includes a slide rod and a first elastic reset member; the slide rod is slidably mounted on the first base and connected to the pressing block, the slide rod has a limiting platform located outside the extrusion groove, and the first elastic reset member is clamped between the limiting platform and the first base.
[0014] Optionally, the bending die further includes a second elastic reset member; the drive assembly is connected to the base through the second elastic reset member, and the second elastic reset member applies an elastic force to move the drive assembly away from the push block.
[0015] Optionally, the driving assembly includes a driving screw, a first slider, and a second slider; the second base has a first slide groove and a second slide groove connected in sequence, the first slider slides in the first slide groove, the second slider slides in the second slide groove, the second slider is located on the sliding path of the first slider, and the pushing block is located on the sliding path of the second slider;
[0016] The drive screw is rotatably mounted on the second base. The drive screw is threadedly connected to the first slider to drive the first slider, the second slider, and the push block to slide in sequence. The second elastic reset member is clamped between the second base and the second slider so that the second slider moves away from the push block.
[0017] Optionally, the second base includes an upper cover plate, an upper mold base, an upper pad plate, an upper clamping plate, a stop plate, and an upper release plate connected in sequence; the upper pad plate and the upper clamping plate together form the first sliding groove, and the second sliding groove passes through the upper clamping plate, the stop plate, and the upper release plate.
[0018] Optionally, the stop plate is provided with a connector and a slot, and a limiting block is provided in the slot. The stop plate is connected to the upper clamping plate through the connector. The upper clamping plate and the upper pad plate together form a limiting cavity communicating with the second slide groove. The second slider has a limiting part located in the limiting cavity. The limiting block is located on the moving path of the limiting part, and the second elastic reset member is clamped between the limiting part and the limiting block.
[0019] Optionally, the first base includes the shaping block and a lower pad, a lower mold base, a lower pad plate, and a lower template connected in sequence; the extrusion groove is formed in the lower template, the shaping block is installed in the extrusion groove, at least part of the first clamping surface is located on the shaping block, and the shaping surface is located on the shaping block.
[0020] Optionally, the pressing block is provided with an extrusion table, the extrusion table has an extrusion arc surface, and the connection between the first clamping surface and the shaping surface is located on the moving path of the extrusion arc surface.
[0021] Optionally, the first clamping surface is smoothly connected to the shaping surface.
[0022] On the other hand, a bending device is provided, including the bending die described above.
[0023] The beneficial effects of this utility model are as follows: In this bending die, the first base and the first base clamp a part of the workpiece during the process of closing close to each other. Then, the driving component drives the pressing block to squeeze the bending part of the workpiece, so that the workpiece is bent. Since the angle between the first clamping surface and the shaping surface of this application is greater than 90 degrees, this application can bend at a larger angle, so that the bending angle of the bending part of the workpiece is slightly greater than the required angle. After the workpiece springs back, it still meets the bending requirements of the workpiece. It does not require multiple bending and forming or additional use of shims or other workpieces for bending, thus improving the efficiency of workpiece bending and forming.
[0024] This bending equipment uses the aforementioned bending die, which can improve the efficiency of workpiece bending and forming. Attached Figure Description
[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0026] Figure 1 This is a schematic diagram of the bending die structure;
[0027] Figure 2 This is a schematic diagram of the bending die's operation.
[0028] Figure 3 An exploded view of a half-section view of a bending die;
[0029] Figure 4 This is a schematic diagram showing the assembly of the drive component, slide bar, first elastic reset component, push block, and shaping block.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. First base; 2. Second base; 3. Push block; 4. Drive assembly; 5. Clamping gap; 6. Slide rod; 7. First elastic reset component; 8. Limiting platform; 9. Second elastic reset component; 10. Workpiece;
[0032] 101. Shaping block; 102. Lower support foot; 103. Lower mold base; 104. Lower backing plate; 105. Lower template; 106. First clamping surface; 107. Shaping surface; 108. Extrusion groove;
[0033] 201. Upper cover plate; 202. Upper mold base; 203. Upper pad plate; 204. Upper clamping plate; 205. Stop plate; 206. Upper release plate; 207. First slide groove; 208. Second slide groove; 209. Connecting piece; 210. Limiting block; 211. Limiting cavity; 212. Second clamping surface;
[0034] 301. Extrusion table; 302. Extrusion arc surface; 303. Fourth pushing inclined surface;
[0035] 401. Drive screw; 402. First slider; 403. Second slider; 404. First pushing inclined surface; 405. Second pushing inclined surface; 406. Third pushing inclined surface; 407. Limiting part. Detailed Implementation
[0036] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "fixed," "linked," "communicated," "abutting," "clamping," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0039] In the description herein, it should be understood that the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings, and are used only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.
[0040] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0042] Unless otherwise stated or defined, the term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.
[0043] For ease of description, unless otherwise stated, the terms "up" and "down" in the following text refer to the same direction as "top" and "bottom". Figure 2 Its left and right directions are consistent, and the left and right directions mentioned below are the same as those in the previous text. Figure 2 Its left-right direction is consistent, and the front-back direction mentioned below is consistent with... Figure 2 Their projection directions are consistent.
[0044] In existing technologies, workpieces such as copper busbars are bent at 90 degrees. However, the material of these workpieces exhibits springback. Using existing molds for bending, the bending angle can only reach 85 to 89 degrees, which does not meet the required bending angle for the product. Therefore, after the workpiece is bent into shape on the mold, it is necessary to adjust it using shims or other methods, requiring a considerable amount of time to adjust it to achieve the desired bending angle. Furthermore, when the required product angle is greater than 90 degrees, existing molds cannot be bent into shape in one go, resulting in low production efficiency.
[0045] like Figures 1 to 4As shown, this embodiment provides a bending die for stamping workpiece 10. In this embodiment, workpiece 10 is a plate-shaped metal part. The bending die can bend workpiece 10 to form a copper busbar. The bending angle can be different angles such as 60 degrees, 90 degrees, and 120 degrees. In this embodiment, a 90-degree bending angle is taken as an example. The raw material of workpiece 10 can be a rolled plate, which is cut into a plate shape by a cutting mechanism before stamping, and then stamped and bent into shape using a bending die.
[0046] The bending die includes a first base 1, a pressing block 3, a second base 2, and a driving assembly 4. The first base 1 and the second base 2 can move closer to each other and further away from each other. When the first base 1 and the second base 2 are close together, the die is closed, and then the workpiece 10 is bent. When the first base 1 and the second base 2 are far apart, the die is opened, and the bent workpiece 10 can be removed. In this embodiment, the first base 1 is located below the second base 2, and the first base 1 and the second base 2 can move up and down relative to each other. The driving assembly 4 is used to drive the pressing block 3 to move, and the pressing block 3 can push the part of the workpiece 10 that needs to be bent to move, so that the workpiece 10 can be bent into shape.
[0047] The first base 1 has an extrusion groove 108 located on its upper surface. The first base 1 has a first clamping surface 106 and a shaping surface 107 located within the extrusion groove 108. A pusher block 3 is slidably mounted on the first base 1 and located within the extrusion groove 108. The second base 2 has a second clamping surface 212. During processing, the fixed portion of the workpiece 10 is placed on the first clamping surface 106, and the bent portion of the workpiece 10 is placed at the extrusion groove 108. When the first base 1 and the second base 2 approach each other, the first clamping surface 106 and the second clamping surface 212 approach each other, thereby clamping a portion of the workpiece 10 together. Then, the bent portion of the workpiece 10 is bent using the cooperation of the drive assembly 4 and the pusher block 3. When the first clamping surface 106 and the second clamping surface 212 move away from each other, the first clamping surface 106 and the second clamping surface 212 release the workpiece 10, allowing it to be removed. The drive assembly 4 is movably mounted on the second base 2 to drive the pressing block 3 towards or away from the shaping surface 107. The pressing block 3 is located on the moving path of the drive assembly 4. During processing, by driving the drive assembly 4 towards the pressing block 3, the pressing block 3 moves towards the shaping surface 107 and presses the bent portion of the workpiece 10, thereby achieving the bending and forming of the workpiece 10. When the drive assembly 4 moves away from the pressing block 3, the pressing block 3 moves away from the workpiece 10.
[0048] A clamping gap 5 is formed between the first clamping surface 106 and the second clamping surface 212. Before processing, the workpiece 10 is placed in the clamping gap 5, and the fixed part of the workpiece 10 is placed on the first clamping surface 106. The first clamping surface 106 is connected to the shaping surface 107. The first clamping surface 106 is parallel to the sliding direction of the push block 3. The shaping surface 107 is located on the sliding path of the push block 3 and is inclined in a direction away from the push block 3. The angle between the first clamping surface 106 and the shaping surface 107 is an obtuse angle. Specifically, the first clamping surface 106 and the second clamping surface 212 are both horizontal planes. The push block 3 slides horizontally left and right. The push block 3 is located to the right of the shaping surface 107. The shaping surface 107 is inclined from top to bottom and to the left, so that the angle between the first clamping surface 106 and the shaping surface 107 is greater than 90 degrees. In this embodiment, the angle between the first clamping surface 106 and the shaping surface 107 is greater than 100 degrees. When the bending die bends the workpiece 10 at a 90-degree angle, the bending portion of the workpiece 10 can be pushed closer to the shaping surface 107 by the cooperation of the drive component 4 and the push block 3, so that the bending angle of the workpiece 10 is slightly greater than 90 degrees. The bending angle pushed by the push block 3 can be adjusted according to the springback characteristics of the workpiece 10 material. Then the push block 3 is held at the current position for a certain period of time, and finally the push block 3 is moved away from the workpiece 10. Even if the workpiece 10 has a slight springback, the bending requirement of 90 degrees can still be achieved. In addition, this application can also bend the workpiece 10 at angles greater than 90 degrees, 100 degrees, etc. This application can reduce the number of bending operations of the workpiece 10 and improve the efficiency of bending and forming the workpiece 10.
[0049] In other embodiments, by increasing the included angle between the first clamping surface 106 and the shaping surface 107, the bending die of this application can bend the workpiece 10 with a larger negative angle.
[0050] Optionally, the bending die also includes a slide rod 6 and a first elastic reset member 7. The slide rod 6 is slidably mounted on the first base 1 and connected to the pressing block 3. The slide rod 6 has a limiting platform 8 located outside the extrusion groove 108, and the first elastic reset member 7 is clamped between the limiting platform 8 and the first base 1. The first elastic reset member 7 is a columnar spring, which is sleeved on the slide rod 6. The limiting platform 8 and the first elastic reset member 7 are located outside the first base 1. One end of the slide rod 6 is located outside the first base 1, and the other end of the slide rod 6 is slidably disposed in the extrusion groove 108 and connected to the pressing block 3. When the driving assembly 4 drives the pressing block 3 to press the workpiece 10, the first elastic reset member 7 undergoes elastic deformation. When the driving assembly 4 resets, the pressing block 3 moves away from the workpiece 10 under the elastic force of the first elastic reset member 7.
[0051] In one embodiment, the bending die further includes a second elastic reset member 9. The drive assembly 4 is connected to the base via the second elastic reset member 9, which applies elastic force to move the drive assembly 4 away from the push block 3. The second elastic reset member 9 includes a washer, a spring, a rubber support, etc. When the drive assembly 4 moves the push block 3 closer to and bends the workpiece 10, the second elastic reset member 9 is compressed or stretched. When the workpiece 10 is bent and formed, the drive assembly 4 is released, and the drive assembly 4 resets under the action of the second elastic reset member 9.
[0052] In other embodiments, the bending die further includes a third elastic reset member. The third elastic reset member is located within the extrusion groove 108 and is clamped between the pressing block 3 and the inner wall of the extrusion groove 108. When the drive assembly 4 is reset, the pressing block 3 moves away from the workpiece 10 under the elastic force of the third elastic reset member.
[0053] Furthermore, the drive assembly 4 includes a drive screw 401, a first slider 402, and a second slider 403. The second base 2 has a first sliding groove 207 and a second sliding groove 208 connected in sequence. The first slider 402 slides in the first sliding groove 207, which extends horizontally in the left-right direction, allowing the first slider 402 to slide left and right. The second slider 403 slides in the second sliding groove 208, which extends vertically, allowing the first slider 402 to slide up and down. The second slider 403 is located on the sliding path of the first slider 402, and the push block 3 is located on the sliding path of the second slider 403.
[0054] The drive screw 401 is rotatably mounted on the second base 2. The drive screw 401 is threadedly connected to the first slider 402 to drive the first slider 402, the second slider 403, and the push block 3 to slide sequentially. The second elastic reset member 9 is clamped between the second base 2 and the second slider 403 so that the second slider 403 is away from the push block 3. The first slider 402 is L-shaped, and the right end of the first slider 402 is located outside the second base 2. The first slider 402 is rotatably mounted on the first slide groove 207 of the second base 2. The left end of the drive screw 401 is rotatably mounted on the second base 2 and threadedly connected to the first slider 402. When the drive screw 401 rotates, it can drive the first slider 402 to slide left and right. The first slider 402 has a first pushing inclined surface 404 on its left side. The upper end of the second slider 403 has a second pushing inclined surface 405 located on the moving path of the first pushing inclined surface 404. The lower end of the second slider 403 has a third pushing inclined surface 406. The upper end of the pressing block 3 has a fourth pushing inclined surface 303 located on the moving path of the third pushing inclined surface 406. Thus, when the drive screw 401 is rotated to make the first slider 402 slide to the left, the first pushing inclined surface 404 presses against the second pushing inclined surface 405, causing the second slider 403 to slide downward. The third pushing inclined surface 406 of the second slider 403 presses against the fourth pushing inclined surface 303, causing the pressing block 3 to move closer to the shaping surface 107, thereby bending the workpiece 10. When the drive screw 401 makes the first slider 402 slide to the right, under the action of the first elastic reset member 7 and the second elastic reset member 9, the second slider 403 moves upward away from the pressing block 3, and the pressing block 3 moves to the right away from the shaping surface 107.
[0055] The bending die of this application features a drive screw 401 on the second base 2. The bending angle of the workpiece 10 is adjusted by rotating the drive screw 401 a certain number of times. Different rotations of the drive screw 401 result in different displacement distances for the push block 3, allowing it to bend the workpiece 10 into the desired angle. After the push block 3 bends the workpiece 10 to 90 degrees, the drive screw 401 is further adjusted to push the workpiece 10 to the left, allowing the bending angle to be adjusted. This prevents the workpiece 10 from springing back and failing to reach the required angle, and reduces errors that may result from multiple bends and operations, thereby improving product consistency and precision. The precise adjustment function of the drive screw 401 also ensures the accuracy of each bending angle. The bending die can process workpieces 10 with bending angles up to 90°, as well as negative angles up to 100 degrees. The bending die of this application can not only improve production efficiency and product quality, but also avoid wear caused by repeated bending, thus improving the durability of the bending die and extending its overall service life.
[0056] In one embodiment, the second base 2 includes an upper cover plate 201, an upper mold base 202, an upper pad plate 203, an upper clamping plate 204, a stop plate 205, and an upper release plate 206 connected in sequence from top to bottom. The upper cover plate 201, upper mold base 202, upper pad plate 203, upper clamping plate 204, stop plate 205, and upper release plate 206 are connected in sequence from top to bottom. The lower end face of the upper pad plate 203 and the upper end face of the upper clamping plate 204 are connected and together form a first sliding groove 207. A second sliding groove 208 passes through the upper clamping plate 204, stop plate 205, and upper release plate 206 in sequence from top to bottom, facilitating the processing of the first sliding groove 207 and the second sliding groove 208.
[0057] Optionally, the stop plate 205 is provided with a connector 209 and a slot, and the connector 209 is a threaded fastener such as a bolt. A limiting block 210 is provided in the slot. The stop plate 205 is connected to the upper clamping plate 204 through the connector 209. The upper clamping plate 204 and the upper pad plate 203 together form a limiting cavity 211 that communicates with the second slide groove 208. The second slider 403 has a limiting part 407 located in the limiting cavity 211. The limiting block 210 is located on the moving path of the limiting part 407, and the second elastic reset member 9 is clamped between the limiting part 407 and the limiting block 210, which facilitates the installation and disassembly of components such as the first slider 402 and the second slider 403, thereby facilitating the production, assembly, disassembly and maintenance of the bending die.
[0058] Furthermore, the first base 1 includes a shaping block 101 and a lower pad 102, a lower mold base 103, a lower pad plate 104, and a lower template 105 connected in sequence. The lower pad 102, lower mold base 103, lower pad plate 104, and lower template 105 are connected in sequence from bottom to top. There are multiple lower pads 102, which are spaced apart from front to back on the lower end face of the lower mold base 103. An extrusion groove 108 is formed on the upper end face of the lower template 105. The shaping block 101 is installed in the extrusion groove 108. At least a portion of the first clamping surface 106 is located on the shaping block 101, and the shaping surface 107 is located on the right side face of the shaping block 101. When the length of the fixed part of the workpiece 10 is short, the entire first clamping surface 106 is located on the shaping block 101. When the length of the fixed part of the workpiece 10 is long, a portion of the first clamping surface 106 is located on the shaping block 101, and a portion is located on the lower template 105. The shaping block 101 is detachable, making it easy to replace different shaping blocks 101. Different shaping blocks 101 have different bending angles, that is, the included angle between the first clamping surface 106 and the shaping surface 107 is different, so that more workpieces 10 with different angles can be bent.
[0059] In one embodiment, the pressing block 3 is provided with an extrusion table 301, which has an extrusion arc surface 302 to prevent the workpiece 10 from being scratched. The connection between the first clamping surface 106 and the shaping surface 107 is located on the moving path of the extrusion arc surface 302, so that the extrusion arc surface 302 can bend the bending point of the workpiece 10.
[0060] Furthermore, the first clamping surface 106 is smoothly connected to the shaping surface 107, that is, the connection between the first clamping surface 106 and the shaping surface 107 forms an arc surface, which can prevent the shaping block 101 from causing scratches to the workpiece 10.
[0061] This embodiment also provides a bending device, including the bending die described above. For example, the bending device further includes a driver, which drives the first base 1 and the second base 2 to move closer to or further apart from each other.
[0062] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A bending die characterized by comprising: It comprises: a first base (1) provided with an extrusion groove (108); the first base (1) is provided with a first clamping surface (106) and a shaping surface (107) located in the extrusion groove (108); a push block (3) slidingly installed in the first base (1) and located in the extrusion groove (108); a second base (2) provided with a second clamping surface (212); and a driving assembly (4) movably installed on the second base (2) to drive the push block (3) to move close to or away from the shaping surface (107); the push block (3) is located on the moving path of the driving assembly (4); a clamping gap (5) is formed between the first clamping surface (106) and the second clamping surface (212), the first clamping surface (106) is connected with the shaping surface (107), the sliding direction of the first clamping surface (106) is parallel to the push block (3), the shaping surface (107) is located on the sliding path of the push block (3) and is inclined away from the push block (3), and the included angle between the first clamping surface (106) and the shaping surface (107) is obtuse. It also comprises a slide rod (6), a first elastic return member (7); the slide rod (6) is slidingly installed on the first base (1) and connected with the push block (3), the slide rod (6) is provided with a limiting table (8) located outside the extrusion groove (108), and the first elastic return member (7) is clamped between the limiting table (8) and the first base (1).
2. The bending die according to claim 1, characterized by It also comprises a second elastic return member (9); the driving assembly (4) is connected with the base through the second elastic return member (9), and the second elastic return member (9) applies elastic force to make the driving assembly (4) move away from the push block (3).
3. The bending die according to claim 2, characterized by The driving assembly (4) comprises a driving screw (401), a first sliding block (402) and a second sliding block (403); the second base (2) is provided with a first sliding groove (207) and a second sliding groove (208) which are sequentially communicated, the first sliding block (402) is slidingly arranged in the first sliding groove (207), the second sliding block (403) is slidingly arranged in the second sliding groove (208), the second sliding block (403) is located on the sliding path of the first sliding block (402), and the push block (3) is located on the sliding path of the second sliding block (403); 4. The bending die according to claim 3, characterized by the driving screw (401) is rotationally installed on the second base (2), the driving screw (401) is threadedly connected with the first sliding block (402) to drive the first sliding block (402), the second sliding block (403) and the push block (3) to slide in sequence, and the second elastic return member (9) is clamped between the second base (2) and the second sliding block (403) to make the second sliding block (403) move away from the push block (3). 5. The bending die according to claim 4, wherein The second base (2) comprises an upper cover plate (201), an upper die seat (202), an upper pad plate (203), an upper clamping plate (204), a stop plate (205), and an upper stripping plate (206) connected in sequence; the upper pad plate (203) and the upper clamping plate (204) jointly enclose the first sliding groove (207), and the second sliding groove (208) penetrates through the upper clamping plate (204), the stop plate (205), and the upper stripping plate (206).
6. The bending die according to claim 5, wherein The stop plate (205) is provided with a connecting piece (209) and a clamping groove, a limiting block (210) is arranged in the clamping groove, the stop plate (205) is connected to the upper clamping plate (204) through the connecting piece (209), the upper clamping plate (204) and the upper pad plate (203) jointly enclose a limiting cavity (211) in communication with the second sliding groove (208), the second sliding block (403) has a limiting portion (407) located in the limiting cavity (211), the limiting block (210) is located on the movement path of the limiting portion (407), and the second elastic reset member (9) is clamped between the limiting portion (407) and the limiting block (210).
7. The bending die according to any one of claims 1 to 6, characterized in that, The first base (1) comprises the shaping block (101) and a lower pad (102), a lower die seat (103), a lower pad plate (104), and a lower die plate (105) connected in sequence; the extrusion groove (108) is arranged in the lower die plate (105), the shaping block (101) is installed in the extrusion groove (108), at least part of the first clamping surface (106) is located on the shaping block (101), and the shaping surface (107) is located on the shaping block (101).
8. The bending die according to any one of claims 1 to 6, characterized in that, The push block (3) is provided with an extrusion table (301), the extrusion table (301) has an extrusion circular arc surface (302), and the connection position of the first clamping surface (106) and the shaping surface (107) is located on the movement path of the extrusion circular arc surface (302).
9. The bending die according to any one of claims 1 to 6, characterized by The first clamping surface (106) and the shaping surface (107) are smoothly connected.
10. A bending apparatus characterized by comprising: The bending die comprises the bending die according to any one of claims 1 to 9.