Angle bending compensation progressive die

Abstract

The utility model discloses an angle bending compensation continuous die, including upper die and lower die, the upper die includes upper die plate and upper forming body, and the upper forming body sets up in the lower part of upper die plate, is provided with a plurality of bending punch on the upper die plate, and a plurality of bending punch sets up in the outside of upper forming body, the lower die includes lower die plate and lower forming body, and the lower forming body sets up in the upper part of lower die plate, be provided with a plurality of bending forming block corresponding with bending punch on the lower forming body, and a plurality of bending forming block and lower forming body constitute lower forming face structure, be provided with a plurality of bending guide block on the lower die plate, and a plurality of bending guide block correspond with bending punch, the rear side of bending punch lower part is provided with inclined plane structure A, the lateral surface of bending guide block upper part is provided with the inclined plane structure B of matching with inclined plane structure A, when bending punch presses down, and the inclined plane structure A and the inclined plane structure B contact and constitute lateral locking.

Description

Technical Field

[0001] This utility model relates to the field of metal stamping forming die technology, specifically to an angle bending compensation continuous die. Background Technology

[0002] In sheet metal processing, progressive dies are a highly efficient production tool that can complete multiple processes such as blanking, punching, and bending in a single stamping stroke. For workpieces involving complex bends, especially those with multiple bending angles, ensuring the accuracy and consistency of each bending angle in continuous production has been a long-standing challenge in the industry.

[0003] Traditional bending dies suffer from the following main drawbacks: First, the bending punch is prone to slight lateral displacement or springback under stress, leading to inaccurate bending angles and non-straight bending lines, affecting workpiece dimensional accuracy and forming quality. Second, during long-term, high-frequency stamping processes, key forming components (such as the punch and forming block) inevitably experience wear, resulting in increased clearance and a gradual decrease in machining accuracy. To address the loss of accuracy due to wear, it is usually necessary to replace the entire module or even the die plate, resulting in high maintenance costs and long cycles. Furthermore, existing die structures often lack sufficient rigidity, exhibiting poor stability under large lateral forces, further impacting the forming stability of the workpiece.

[0004] Therefore, there is an urgent need in this field for a new type of continuous die structure that can not only achieve high-precision bending, but also effectively resist lateral forces and compensate for wear, thereby maintaining stable processing quality and reducing maintenance costs during long-term use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a continuous angle bending die. This structure aims to solve problems such as lateral offset, accuracy degradation, and short die life during the bending process through a unique inclined plane locking mechanism and modular compensation design.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An angle-compensating continuous die includes an upper die and a lower die. The upper die includes an upper template and an upper forming body, the upper forming body being disposed at the lower part of the upper template. Multiple bending punches are disposed on the upper template and located on the outer side of the upper forming body. The lower die includes a lower template and a lower forming body, the lower forming body being disposed at the upper part of the lower template. Multiple bending forming blocks corresponding to the bending punches are disposed on the lower forming body, forming a lower forming surface structure with the lower forming body. Multiple bending guide blocks are disposed on the lower template, each corresponding to a bending punch. A sloped structure A is disposed on the lower rear side of each bending punch, and a sloped structure B matching the sloped structure A is disposed on the upper side of each bending guide block. When the bending punch is pressed down, the sloped structure A and the sloped structure B contact to form a lateral locking mechanism.

[0007] Furthermore, the lower part of the upper molded body is provided with an upper molding surface structure.

[0008] Furthermore, the lower front side of the bending punch is provided with an upper bending forming surface structure.

[0009] Furthermore, the bending forming block is provided with a lower bending forming surface structure that matches the upper bending forming surface structure.

[0010] Furthermore, the lower molded body is provided with a fixed mounting groove, and the bending forming block is disposed in the fixed mounting groove.

[0011] Furthermore, a pad is provided between the outer side of the bending block and the inner side of the fixing groove.

[0012] Furthermore, a pad and a wear-resistant block are sequentially arranged on the inclined structure B of the bending guide block.

[0013] Furthermore, the upper mold also includes a guide sleeve, which is disposed on the upper template; the lower mold also includes a guide post, which is disposed on the lower template and cooperates with the guide sleeve.

[0014] Compared with existing technologies, the technical solution of this patent achieves the following beneficial effects: 1. By cooperating with the inclined surface of the bending punch and the bending guide block, dynamic lateral locking is achieved, which effectively eliminates lateral gaps and springback during the bending process, ensuring the accuracy and stability of the bending angle and good product consistency.

[0015] 2. The modular bending and forming block design, combined with pads and dedicated wear-resistant blocks, forms an effective wear compensation system. Key vulnerable parts can be quickly replaced, avoiding the scrapping of the entire large component. This allows the mold to maintain its precision even under long-term high-intensity use, significantly reducing the total life cycle cost.

[0016] 3. The overall force transmission path is rationally designed, with a compact and rigid structure capable of withstanding high-frequency, high-intensity stamping operations, ensuring stable and reliable operation. It integrates surface forming and multi-angle bending functions, enabling multi-process machining of workpieces in a single stamping stroke, significantly improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the angle bending compensation continuous mold (before mold closing) of this utility model; Figure 2 This is a side view of the angle bending compensation continuous mold (before mold closing) of this utility model. Figure 3 This is a three-dimensional structural diagram of the upper mold of this utility model; Figure 4 This is a three-dimensional structural diagram of the lower mold of this utility model; Figure 5 This is a three-dimensional structural diagram of the angle bending compensation continuous mold (mold closing) of this utility model; Figure 6 This is a side view of the angle bending compensation continuous mold (mold closing) of this utility model; Figure 7 This is a cross-sectional structural schematic diagram of the angle bending compensation continuous mold (mold closing) of this utility model; Figure 8 This is a three-dimensional structural diagram of the molded workpiece of this utility model.

[0018] In the diagram: 1. Upper die; 11. Upper template; 12. Upper forming body; 121. Upper forming surface structure; 13. Bending punch; 131. Upper bending forming surface structure; 132. Inclined surface structure A; 14. Guide sleeve; 2. Lower die; 21. Lower template; 22. Lower forming body; 221. Lower forming surface structure; 222. Fixed mounting groove; 23. Bending forming block; 231. Lower bending forming surface structure; 24. Bending guide block; 241. Inclined surface structure B; 25. Guide post; 3. Pad block; 4. Wear-resistant block; 5. Formed workpiece. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figure 1-8As shown, this embodiment provides an angle bending compensation continuous die, including an upper die 1 and a lower die 2. The upper die 1 includes an upper template 11 and an upper forming body 12, with the upper forming body 12 disposed below the upper template 11. Multiple bending punches 13 are disposed on the upper template 11, and the multiple bending punches 13 are disposed on the outer side of the upper forming body 12. The lower die 2 includes a lower template 21 and a lower forming body 22, with the lower forming body 22 disposed above the lower template 21. The lower forming body 22 is provided with multiple bending punches corresponding to the bending punches 13. A molding block 23, several bending forming blocks 23, and a lower forming body 22 constitute a lower forming surface structure 221. Multiple bending guide blocks 24 are provided on the lower template 21, corresponding to the bending punch 13. A sloped structure A132 is provided on the lower rear side of the bending punch 13, and a sloped structure B241 matching the sloped structure A132 is provided on the upper side of the bending guide block 24. When the bending punch 13 is pressed down, the sloped structure A132 and the sloped structure B241 contact each other to form a lateral lock. Through the cooperation between the sloped structure A132 on the rear side of the bending punch 13 and the sloped structure B241 on the bending guide block 24, the vertical force is decomposed when the bending punch 13 is pressed down, generating a horizontal locking force. This force pushes the bending punch 13 tightly against the bending forming block 24, achieving dynamic lateral locking. This greatly enhances the rigidity of the bending process, effectively suppresses the springback and offset of the punch, and ensures the repeatability of each bending action, thereby ensuring the ultra-high stability and consistency of the workpiece bending angle.

[0021] It should be noted that, considering the flexibility of mold design and the bending process requirements of specific workpieces, not all bending punches 13 must adopt a beveled locking structure. In some embodiments, depending on the actual force conditions, a beveled structure A132 and a corresponding bending guide block 24 with a beveled structure B241 can be provided on one side of the mold (e.g., the side bearing the main lateral force) of the bending punch 13; while on the other side of the mold, the lower rear side of the bending punch 13 can be machined into a vertical surface structure, and the upper side of the corresponding bending guide block 24 is also set as a vertical guide surface. A pad block 3 and a wear-resistant block 4 can also be provided on this vertical guide surface. In this configuration, the beveled side generates an active locking force through the bevel engagement, while the vertical side mainly serves as a guide and support, forming a sliding engagement with the vertically structured bending punch 13 to jointly prevent springback and offset. This hybrid design simplifies the mold structure and reduces costs while ensuring locking accuracy at critical positions.

[0022] The lower part of the upper forming body 12 is machined with an upper forming surface structure 121 for forming the main body shape. The upper forming surface structure 121 works together with the lower forming surface structure to accurately press the main curved surface or shape of the workpiece. The lower front side of the bending punch 13 (i.e., the side facing the bending area of ​​the workpiece) is provided with an upper bending forming surface structure 131 for performing the bending action. The upper bending forming surface structure 131 is specifically responsible for forming the bending area of ​​the workpiece. This allows the mold to simultaneously complete complex shapes and angled bends, improving the functional integration and processing efficiency of the mold, and ensuring the accuracy of the overall and local shape of the workpiece.

[0023] The bending forming block 23 is provided with a lower bending forming surface structure 231 that matches the upper bending forming surface structure 131 of the bending punch 13. The lower bending forming surface structure 231 on the bending forming block 23 and the upper bending forming surface structure 131 of the bending punch 13 are a pair of matching working surfaces. Together, they form a precision bending profile. This ensures that the bending force is applied evenly to the workpiece, allowing the material to be bent precisely according to the preset profile, significantly improving the accuracy of the bending angle and the surface quality of the bending area, and effectively controlling springback.

[0024] The lower forming body 22 is provided with a fixed mounting groove 222 for the bending forming block 23 to be placed therein. A pad 3 is provided between the outer side of the bending forming block 23 and the inner side of the fixed mounting groove 222 of the lower forming body 22. The fixed mounting groove 222 provides a standardized installation position for the bending forming block 23, realizing modular installation and facilitating disassembly and maintenance. The pad 3 is the core compensation mechanism. By replacing pads of different thicknesses, the precise position of the bending forming block 23 in the horizontal direction can be finely adjusted. This not only compensates for tolerances in the mold manufacturing process, but also compensates for wear on the working surface after long-term use, restoring the mold to its initial accuracy, greatly extending the service life of the mold, and reducing maintenance costs.

[0025] The inclined structure B241 of the bending guide block 24 is sequentially equipped with a pad block 3 and a wear-resistant block 4. The pad block 3 also serves as a positional compensation, ensuring the initial engagement clearance of the locking mechanism. The wear-resistant block 4 directly bears the friction with the bending punch and is made of a material with superior wear resistance, such as cemented carbide or tool steel. When the wear-resistant block 4 wears out, only the wear-resistant block itself needs to be replaced, without replacing the entire bending guide block or the lower die plate. This significantly improves the durability of the key moving parts of the die and reduces maintenance frequency and costs.

[0026] The upper die 1 also includes a guide sleeve 14, which is disposed on the upper template 11; the lower die 2 also includes a guide post 25, which is disposed on the lower template 21 and cooperates with the guide sleeve 14. The cooperation between the guide post 25 and the guide sleeve 14 provides precise guidance for the upper die 1 and the lower die 2, ensuring that the upper and lower dies can be accurately aligned in each stamping, avoiding die damage and product scrap rate caused by misalignment, and improving the reliability and safety of the operation.

[0027] The working principle of this utility model is as follows: During the stamping process, the upper template 11 is driven to move downward by the external stamping mechanism, which drives the upper forming body 12 and all bending punches 13 to press down synchronously.

[0028] Forming and bending: The upper forming surface structure 121 of the upper forming body 12 and the lower forming surface structure 221 formed by the lower forming body 22 and the bending forming block 23 on it come into contact, forming the main body of the workpiece. At the same time, the upper bending forming surface structure 131 of the bending punch 13 and the lower bending forming surface structure 231 of the bending forming block 23 work together to compress the part of the workpiece to be bent, completing the bending action.

[0029] Lateral locking: As the bending punch 13 presses down, its inclined structure A132 contacts the inclined structure B241 on the bending guide block 24 through the wear-resistant block 4. The vertical downward pressure is decomposed, generating a horizontal locking force. This force pushes the bending punch 13 tightly against the bending forming block 23, forming a dynamic lateral locking. This mechanism greatly enhances the rigidity of the bending process, effectively preventing the bending punch from deviating and springing back, and ensuring the accuracy and stability of the bending angle.

[0030] The bending punch 13 with its vertical surface structure and the bending guide block 24 with its vertical guide surface primarily function as a precision guide and rigid support during operation. When the upper die is pressed down, the bending punch 13 with its vertical surface structure slides tightly against the vertical guide surface (via the wear-resistant block 4). Although this mating surface does not generate an active horizontal locking force, it forms a robust guide pair that effectively limits the offset of the bending punch on this side in any direction and resists the springback torque generated during bending. Thus, it works in conjunction with the side with the inclined locking surface to ensure the stability and accuracy of the entire bending system.

[0031] Reset: The stamping mechanism drives the upper die 1 to rise during the return stroke, the inclined structure of the bending punch 13 separates from the bending guide block 24, and the locking state is released. The operator can then remove the formed workpiece 5 and feed in a new blank to enter the next work cycle.

Claims

1. A continuous angle bending compensation die, comprising an upper die (1) and a lower die (2), wherein the upper die (1) comprises an upper template (11) and an upper forming body (12), the upper forming body (12) being disposed at the lower part of the upper template (11), and a plurality of bending punches (13) being disposed on the upper template (11), the plurality of bending punches (13) being disposed on the outer side of the upper forming body (12); the lower die (2) comprises a lower template (21) and a lower forming body (22), the lower forming body (22) being disposed at the upper part of the lower template (21), characterized in that, The lower forming body (22) is provided with a plurality of bending forming blocks (23) corresponding to the bending punch (13). The plurality of bending forming blocks (23) and the lower forming body (22) constitute a lower forming surface structure (221). The lower template (21) is provided with a plurality of bending guide blocks (24). The plurality of bending guide blocks (24) correspond to the bending punch (13). The lower rear side of the bending punch (13) is provided with a slope structure A (132). The upper side of the bending guide block (24) is provided with a slope structure B (241) that matches the slope structure A (132). When the bending punch (13) is pressed down, the slope structure A (132) and the slope structure B (241) contact each other to form a lateral lock.

2. The angle bending compensation continuous die according to claim 1, characterized in that, The upper molded body (12) has an upper molded surface structure (121) at its lower part.

3. The angle bending compensation continuous die according to claim 1, characterized in that, The lower front side of the bending punch (13) is provided with an upper bending forming surface structure (131).

4. The angle bending compensation continuous die according to claim 3, characterized in that, The bending forming block (23) is provided with a lower bending forming surface structure (231) that matches the upper bending forming surface structure (131).

5. The angle bending compensation continuous die according to claim 1, characterized in that, The lower molding body (22) is provided with a fixed mounting groove (222), and the bending molding block (23) is disposed in the fixed mounting groove (222).

6. The angle bending compensation continuous die according to claim 5, characterized in that, A pad (3) is provided between the outer side of the bent forming block (23) and the inner side of the fixed mounting groove (222).

7. The angle bending compensation continuous die according to claim 1, characterized in that, The inclined structure B (241) of the bending guide block (24) is provided with a pad (3) and a wear-resistant block (4) in sequence.

8. The angle bending compensation continuous die according to claim 1, characterized in that, The upper mold (1) also includes a guide sleeve (14), which is disposed on the upper template (11); the lower mold (2) also includes a guide post (25), which is disposed on the lower template (21) and cooperates with the guide sleeve (14).

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