Sheet metal inclined pressure punching die

Abstract

The utility model discloses a sheet metal oblique pressing punching die, which comprises an upper die structure and a lower die structure, the upper die structure comprises an upper die seat, a liftable material pressing assembly is arranged at the bottom of the upper die seat, an oblique through groove is arranged in the middle of the material pressing assembly, a punching structure capable of sliding up and down is arranged in the oblique through groove sleeve, and the lower die structure is arranged on the lower die seat. The lower die structure comprises a lower die base, a metal plate positioning and clamping structure with the embedding characteristic is formed between the top of the lower die base and the bottom of the material pressing assembly, and a punching female die insert is arranged at the top of the lower die base. And a hidden suspension type inclined punching structure for the metal plate is formed among the inclined through groove, the punching female die insert and the punching structure. By means of synchronous slope movement of the punch and the sliding block, normal forward punching of the slope portion of a sheet metal workpiece is achieved, the punching angle does not need to be manually adjusted, operation is convenient, and machining efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of punching processing technology for automotive parts, specifically a sheet metal oblique pressing punching die. Background Technology

[0002] Automobile bodies and their components often have complex geometries, with some sheet metal parts featuring beveled or curved edges and transition areas, such as the support brackets for the left and right rear suspension arms. When machining these parts, a punching process is required to create reference holes on the thin-walled beveled surfaces.

[0003] Traditional punching dies are mainly suitable for processing flat sheet metal parts. However, when punching on inclined or curved surfaces, manual drilling or custom-made dies are usually required. When processing holes on inclined surfaces, the thin-walled inclined or curved surface of the punching area easily leads to material deformation after punching, reducing processing efficiency and increasing labor costs. Furthermore, it is difficult to ensure that the punch and the punching point maintain a perpendicular angle throughout the processing, potentially resulting in tilted cross-sections or hole diameter deviations after punching, failing to meet the requirements of forward stamping in the normal direction.

[0004] Therefore, it is necessary to provide a sheet metal oblique punching die that can fix the sheet metal part as a whole during punching, without affecting the tilt angle of the sheet metal part's inclined surface, and can ensure that the angle between the punch and the punching point is perpendicular during punching, and ensure that the inner diameter cross-section of the hole has no slope. Utility Model Content

[0005] This utility model proposes a sheet metal oblique pressing punching die to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sheet metal oblique punching die includes an upper die structure and a lower die structure. The upper die structure includes an upper die base, and a liftable pressing component is installed at the bottom of the upper die base. An oblique through groove is provided in the middle of the pressing component, and a punching structure that can slide up and down is provided in the oblique through groove. The lower die structure includes a lower die base, and a sheet metal positioning and clamping structure with interlocking features is formed between the top of the lower die base and the bottom of the pressing component. A punching die insert is provided at the top of the lower die base, and the oblique through groove, the punching die insert, and the punching structure form a hidden and suspended oblique punching structure for the sheet metal.

[0008] Preferably, the punching structure includes a slider located within an inclined through groove. A pad is provided at the bottom of the slider, and a clamping plate is provided at the bottom of the pad. Several punches are mounted on the clamping plate. Wear-resistant plates are installed on all four sides of the slider. Spring top blocks are fixed to the upper parts of the left and right sides of the slider, and limit blocks are fixed to the upper parts of the front and rear sides of the slider. The wear-resistant plates protect the four sides of the slider, preventing direct contact and friction between the slider and the inner wall of the inclined through groove. This avoids wear after frequent contact and sliding between the slider sides and the inner wall of the inclined through groove, thus reducing the impact of slider wear on the punching effect. The wear-resistant plates can be made of high-temperature resistant materials to reduce the impact of high temperatures generated during stamping due to high-pressure friction between the wear-resistant plates and the inner wall of the inclined through groove on the subsequent punching effect.

[0009] Preferably, the pressing assembly includes a pressing plate, a pressing insert fixed on the pressing plate at the bottom of the inclined through groove, and limiting blocks corresponding to the limiting blocks on the pressing plates on the front and rear sides of the top of the inclined through groove. Nitrogen springs corresponding to the spring top blocks are provided on the pressing plates on the left and right sides of the top of the inclined through groove. The limiting blocks contact the limiting blocks to prevent the punching structure from detaching from the inclined through groove. The movable end of the nitrogen spring contacts the spring top block to lift the punching structure as a whole.

[0010] Preferably, the bottom of the pressure plate and the top of the lower die base are both complementary L-shaped inclined surface structures. The inclined through groove is relatively perpendicular to the inclined surface of the lower die base where the punching die insert is provided, so that the punch moves obliquely relative to the punching die insert along with the slider.

[0011] Preferably, the pressure insert has multiple through holes corresponding to the punches, and the bottom of the upper die base has a pressure groove matching the shape of the pressure plate. The pressure plate slides vertically within the pressure groove, and a wear-resistant pad is provided at the top of the pressure groove, directly above the opening at the top of the inclined through groove. The wear-resistant pad contacts the top of the slider to prevent direct contact between the top of the slider and the upper die base, reducing wear and also providing vibration damping and noise reduction. Both the wear-resistant pad and the wear-resistant plate are removable and replaceable, facilitating quick maintenance and replacement after wear, and improving work efficiency.

[0012] Preferably, the pressure plate has two mounting plates on its top, located on either side of the inclined through groove. Each mounting plate is equipped with a telescopic guide post, the upper end of which is movable and fixed to the top of the pressure groove. The telescopic guide post guides the pressure plate, ensuring its vertical movement within the pressure groove, and also acts as a limit to prevent the pressure plate from detaching from the pressure groove.

[0013] Preferably, a groove is provided on the inclined surface at the top of the lower die base, and the punching die insert is inserted into the groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model discloses a sheet metal oblique punching die. An upper die base drives a vertically movable pressure assembly and a punching structure that moves obliquely within an oblique slot. The punch and punching die insert remain relatively perpendicular, and the punch's tilt angle matches the oblique movement angle of the slider. During the oblique movement of the punch with the slider, the punch sequentially passes through the perforation and the sheet metal workpiece, achieving normal punching of the workpiece's oblique surface, effectively meeting the requirement of a non-oblique inner diameter cross-section for punching. Simultaneously, a telescopic guide post connects the upper die base to the pressure plate, ensuring that the pressure plate insert firmly presses the workpiece against the lower die plate throughout the entire process of punching the workpiece's oblique surface and disengaging from the workpiece. This design effectively prevents the punch from affecting the workpiece's oblique surface and the inner diameter of the punch during operation, thus protecting the shape and structure of the workpiece's oblique surface and the punched area, and improving production efficiency and yield. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the overall structure of this utility model when it is not in operation;

[0017] Figure 2 This is a schematic cross-sectional view of the upper and lower mold structures in their working states according to this utility model.

[0018] Figure 3 This is a schematic diagram of the upper mold structure component of this utility model;

[0019] Figure 4 This is a schematic diagram of the lower mold structure and process component structure of this utility model;

[0020] 1. Upper die structure; 2. Lower die structure; 3. Upper die base; 4. Pressure plate assembly; 5. Punching structure; 6. Angled through slot; 7. Lower die base; 8. Punching die insert; 9. Pressure plate groove; 10. Telescopic guide post; 11. Wear-resistant pad; 12. Slider; 13. Wear-resistant plate; 14. Limiting block; 15. Spring top block; 16. Pad plate; 17. Clamping plate; 18. Punch; 19. Nitrogen spring; 20. Limiting stop; 21. Insert groove; 22. Pressure plate insert; 23. Through hole; 24. Pressure plate; 25. Mounting plate; A. Process parts. Detailed Implementation

[0021] 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.

[0022] Reference Figure 1-4 A sheet metal oblique punching die includes an upper die structure 1 and a lower die structure 2. The upper die structure 1 includes an upper die base 3, and a liftable pressing component 4 is installed at the bottom of the upper die base 3. An oblique through groove 6 is provided in the middle of the pressing component 4, and a punching structure 5 that can slide up and down is provided in the oblique through groove 6. The lower die structure 2 includes a lower die base 7. The top of the lower die base 7 and the bottom of the pressing component 4 form a sheet metal positioning and clamping structure with interlocking features. A punching die insert 8 is provided at the top of the lower die base 7, and the oblique through groove 6, the punching die insert 8 and the punching structure 5 form a hidden and suspended oblique punching structure 5 for the sheet metal.

[0023] The punching structure 5 includes a slider 12 located within an inclined through groove 6. A pad 16 is provided at the bottom of the slider 12, and a clamping plate 17 is provided at the bottom of the pad 16. Several punches 18 are mounted on the clamping plate 17. Wear-resistant plates 13 are installed on all four sides of the slider 12. Spring top blocks 15 are fixed to the upper parts of the left and right sides of the slider 12, and limit blocks 14 are fixed to the upper parts of the front and rear sides of the slider 12. The wear-resistant plates 13 protect the four sides of the slider 12, preventing direct contact and friction between the slider 12 and the inner wall of the inclined through groove 6. This avoids wear after frequent contact and sliding between the sides of the slider 12 and the inner wall of the inclined through groove 6, thus reducing the impact on the punching effect after wear of the slider 12. The wear-resistant plates 13 can be made of high-temperature resistant materials to reduce the impact of high temperatures generated during stamping due to high-pressure friction between the wear-resistant plates 13 and the inner wall of the inclined through groove 6 on the subsequent punching effect.

[0024] The pressing assembly 4 includes a pressing plate 24. A pressing insert 22 is fixed on the pressing plate 24 at the bottom of the inclined through groove 6. Limiting blocks 20 corresponding to limiting blocks 14 are provided on the pressing plates 24 on the front and rear sides of the top of the inclined through groove 6. Nitrogen springs 19 corresponding to spring top blocks 15 are provided on the pressing plates 24 on the left and right sides of the top of the inclined through groove 6. The limiting blocks 20 are in contact with the limiting blocks 14 to prevent the punching structure 5 from disengaging from the inclined through groove 6. The movable end of the nitrogen spring 19 is in contact with the spring top block 15 to lift the punching structure 5 as a whole.

[0025] The bottom of the pressure plate 24 and the top of the lower mold base 7 are both complementary L-shaped inclined surface structures.

[0026] The pressure insert 22 has multiple through holes 23 corresponding to the punches 18. The bottom of the upper die base 3 has a pressure groove 9 that matches the shape of the pressure plate 24. The pressure plate 24 slides vertically within the pressure groove 9. A wear-resistant pad 11 is provided at the top of the pressure groove 9, and the wear-resistant pad 11 is located directly above the top opening of the inclined through groove 6. The wear-resistant pad 11 is used to contact the top of the slider 12 to prevent the top of the slider 12 from directly contacting the upper die base 3, reducing wear, and also playing a role in shock absorption and noise reduction. Both the wear-resistant pad 11 and the wear-resistant plate 13 are removable and replaceable, facilitating quick maintenance and replacement after wear, and improving work efficiency.

[0027] The pressure plate 24 has two mounting plates 25 on its top, located on either side of the inclined through groove 6. Each mounting plate 25 is equipped with a telescopic guide post 10, the upper end of which is movable and fixed to the top of the pressure groove 9. The telescopic guide post 10 guides the pressure plate 24, ensuring its vertical movement within the pressure groove 9, and also acts as a limit to prevent the pressure plate 24 from detaching from the pressure groove 9.

[0028] The lower die base 7 has a groove 21 on its inclined surface at the top, and the punching die insert 8 is inserted into the groove 21.

[0029] When this utility model is used, after the flat sheet metal is initially processed, it forms a left and right rear suspension arm support component with an irregular multi-turn inclined surface. The component is placed on the lower mold base 7, the position of the component is adjusted, and the part of the inclined surface that needs to be punched is located on the punching die insert 8. The upper mold base 3 moves down, driving the punching structure 5 and the pressure assembly 4 to move downward together. The pressure plate 24 first contacts the top of the component and presses the component tightly on the lower mold base 7.

[0030] By extending and retracting the telescopic guide post 10, the pressing assembly 4 presses the workpiece while the upper mold base 3 continues to move downward until the wear-resistant pad 11 contacts the top of the slider 12. The upper mold base 3 applies downward pressure to the slider 12 through the wear-resistant pad 11, thereby causing the slider 12 to slide obliquely downward along the oblique through groove 6. At the same time, the spring top block 15 contacts and compresses the nitrogen spring 19.

[0031] The punch 18 passes through the hole 23 on the blank holder 22 to punch the workpiece until the end of the punch 18 extends into the punching die insert 8, completing the normal punching process of the inclined surface of the workpiece.

[0032] After the workpiece is formed by oblique punching, the upper die base 3 moves upward, and at the same time, the nitrogen spring 19 returns to its original position and pops out, sliding the entire punching structure 5 along the oblique through groove 6 and returning to its original position. During the resetting of the upper die base 3 and the punching structure 5, the pressure assembly 4 still presses the workpiece tightly on the lower die base 7 to prevent the punch 18 from moving the workpiece and affecting the punching shape when it resets. When the punch 18 completely disengages from the punching die insert 8 and the punching of the workpiece, it is the maximum extension length of the telescopic guide post 10. At this time, the pressure assembly 4 moves upward and resets together with the upper die base 3, completing the stamping process of the workpiece.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style 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.

Claims

1. A die for oblique pressing and piercing of sheet metal, comprising an upper die structure (1) and a lower die structure (2), characterized in that, The upper die structure (1) comprises an upper die base (3), the bottom of the upper die base (3) is provided with a liftable material pressing assembly (4), the middle of the material pressing assembly (4) is provided with an oblique through groove (6), the oblique through groove (6) is internally provided with a punch structure (5) capable of sliding up and down, the lower die structure (2) comprises a lower die base (7), the top of the lower die base (7) and the bottom of the material pressing assembly (4) are provided with a sheet metal positioning and clamping structure with a fitting feature, the top of the lower die base (7) is provided with a punch concave die insert (8), and the oblique through groove (6), the punch concave die insert (8) and the punch structure (5) form a hidden suspension type oblique punching structure (5) for sheet metal.

2. The die set as defined in claim 1, wherein, The punch structure (5) comprises a sliding block (12) located in the oblique through groove (6), the bottom of the sliding block (12) is provided with a backing plate (16), the bottom of the backing plate (16) is provided with a clamping plate (17), a plurality of punches (18) are mounted on the clamping plate (17), wear-resistant plates (13) are mounted on the four sides of the sliding block (12), spring top blocks (15) are respectively fixed to the upper parts of the left and right sides of the sliding block (12), and limit blocks (14) are respectively fixed to the upper parts of the front and rear sides of the sliding block (12).

3. The die set as defined in claim 2 wherein, The material pressing assembly (4) comprises a material pressing plate (24), the material pressing plate (24) at the bottom of the oblique through groove (6) is fixed with a material pressing insert (22), the material pressing plate (24) at the top of the oblique through groove (6) is provided with a limit block (20) corresponding to the limit block (14) on the front and rear sides, and the material pressing plate (24) at the top of the oblique through groove (6) is provided with a nitrogen gas spring (19) corresponding to the spring top block (15) on the left and right sides.

4. The die set as defined in claim 3 wherein, The bottom of the material pressing plate (24) and the top of the lower die base (7) are complementary L-shaped inclined surface structures.

5. The die set as defined in claim 4 wherein, The material pressing insert (22) is provided with a plurality of through holes (23) corresponding to the punches (18), the bottom of the upper die base (3) is provided with a material pressing groove (9) matching the shape of the material pressing plate (24), the material pressing plate (24) vertically slides in the material pressing groove (9), the top of the material pressing groove (9) is provided with a wear-resistant pad (11) located directly above the top opening of the oblique through groove (6).

6. The die set as defined in claim 5 wherein, The top of the material pressing plate (24) is provided with two mounting plates (25), the two mounting plates (25) are respectively located on the two sides of the oblique through groove (6), and each mounting plate (25) is provided with a telescopic guide column (10), the upper end of the telescopic guide column (10) is a movable end and is fixed to the top of the material pressing groove (9).

7. The die set as defined in claim 6 wherein, The top of the lower die base (7) is provided with a recess (21) at the inclined surface, and the punch concave die insert (8) is embedded into the recess (21).

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