Barb suspension type sheet metal punching die

Abstract

The utility model discloses a barb suspension type metal plate punching die which comprises an upper die structure and a lower die structure, the upper die structure comprises an upper die base, a spring inclined punching structure moving in the horizontal direction and a material pressing assembly lifting in the vertical direction are installed on the bottom face of the upper die base, and the lower die structure comprises a lower die base. An inclined guide structure and a lower die plate are installed on the top of the lower die base, the lower die plate is located under the material pressing assembly, and the inclined guide structure is located under the spring inclined punching structure. By means of synchronous slope movement of the punch and the installation piece, normal forward punching of the slope portion of the sheet metal working procedure piece 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 technical field, specifically a hook-type suspended sheet metal punching die. Background Technology

[0002] In automotive parts manufacturing, punching of sheet metal parts is a critical process. These parts often have complex and diverse shapes and structures, and some sheet metal parts require punching on their beveled surfaces. Due to the thinness of these sheet metal parts and the critical requirement for punching quality, a normal punching process must be used to prevent the formation of a bevel on the inner cross-section of the hole. However, traditional punching equipment has the following technical drawbacks in practical applications: First, the punching process easily interferes with the tilt angle of the sheet metal part's beveled surface, causing deformation of the beveled structure, which in turn affects the stability of subsequent processing steps and the quality of the finished product; second, existing punching processes struggle to accurately implement normal punching, resulting in residual bevel characteristics on the inner diameter cross-section of the hole, and in severe cases, even deviations in the hole diameter, directly affecting the functional performance of the parts.

[0003] Therefore, it is necessary to provide a hook-type suspended sheet metal punching die that can achieve normal punching, does not affect the tilt angle of the sheet metal surface, and ensures that the inner diameter section of the hole has no slope. Utility Model Content

[0004] This utility model proposes a hook-type suspended sheet metal punching die to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hook-shaped suspended sheet metal punching die includes an upper die structure and a lower die structure. The upper die structure includes an upper die base, on the bottom surface of which is mounted a horizontally movable spring-loaded oblique punching structure and a vertically lifting pressure assembly. The lower die structure includes a lower die base, on the top of which is mounted an oblique guide structure and a lower template. The lower template is located directly below the pressure assembly, and the top of the lower template and the bottom of the pressure assembly form a sheet metal positioning and clamping structure with interlocking features. The oblique guide structure is located directly below the spring-loaded oblique punching structure, and the spring-loaded oblique punching structure and the oblique guide structure slide in contact to form a hook-shaped suspended positioning and punching structure for the sheet metal.

[0007] Preferably, the spring-loaded oblique punching structure includes a mounting component. Two L-shaped guide blocks are symmetrically fixed to the bottom of the upper die base, forming a groove between the two L-shaped guide blocks. A slider is provided on the top of the mounting component, and the mounting component is slidably mounted on the groove via the slider. A wear-resistant plate is installed on the top of the slider to protect it and reduce wear during sliding.

[0008] Preferably, a spring top block is installed at the bottom of the upper mold base on one side of the mounting component, and a limit block is installed at the bottom of the upper mold base on the other side of the mounting component. The spring top block has two nitrogen springs on the side facing the mounting component, and the movable ends of the nitrogen springs contact the mounting component. A silencer is provided on the side of the limit block facing the mounting component, and a silencer groove is provided on the side of the mounting component. The silencer extends into the silencer groove and contacts the mounting component. The silencer is a polyurethane silencer, which buffers and reduces noise when the nitrogen springs reset the mounting component.

[0009] Preferably, the bottom ends of the mounting component are a long convex end and a short convex end, respectively. The inward side of the long convex end is a slope one, on which a V-shaped guide block is installed. Both sides of the long convex end are equipped with return hooks. The bottom surface of the short convex end is a slope two, on which a punching assembly is installed.

[0010] Preferably, the punching assembly includes a gasket mounted on the inclined plane two, a clamping plate fixedly mounted on the gasket, the clamping plate having a hollow center, and a clamping plate insert disposed within the hollow center, with a punch mounted on the clamping plate insert. Both the clamping plate and the clamping plate insert are fixed to the short protruding end by screws passing through the gasket.

[0011] Preferably, the pressing assembly includes a pressing plate, the top of the pressing plate is provided with a lifting guide column that is movably connected to the upper mold base, the bottom of the pressing plate is provided with a pressing plate insert, the pressing plate insert is provided with a punching slot, the punching slot is located directly below the punch and the clamping plate.

[0012] Preferably, the oblique guide structure includes a guide seat, the outer side of which is an inclined surface three. A guide wear-resistant plate is mounted on the inclined surface three, and a hook groove is provided between the guide wear-resistant plate and the inclined surface three. The end of the return hook opposite to the long convex end is slidably engaged with the groove. The inclination angles of the relative surfaces of the guide wear-resistant plate and the V-shaped guide block, as well as the inclination angle of the punch, are the same, allowing the V-shaped guide block to conform to the inclined surface of the guide wear-resistant plate and move at a fixed inclination angle. At the same time, the punch can perform oblique punching on the sheet metal at the same moving angle as the V-shaped guide block.

[0013] Preferably, the side of the guide wear-resistant plate facing the V-shaped guide block is a V-shaped convex surface, and the side of the V-shaped guide block facing the guide wear-resistant plate is a V-shaped concave surface. The V-shaped convex surface and the V-shaped concave surface slide in corresponding contact. This serves a guiding function, preventing positional or angular displacement when the V-shaped guide block slides in contact with the guide wear-resistant plate.

[0014] Preferably, the lower template is located directly below the pressure plate. The lower template is equipped with several positioning pins and a lower die insert, which is located directly below the punching slot. Four positioning pins are provided to position the sheet metal and pressure plate insert, ensuring the accuracy of the punch's drilling position on the sheet metal. The lower die insert is installed at an angle on the lower template, with the same angle as the punch, serving to detect and position the punching angle. The punching angle can be adjusted by uniformly replacing the V-shaped guide block, guide wear plate, clamping plate, and lower die insert with the same angle of inclination.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention features a horizontally movable spring-loaded oblique punching structure and a vertically lifting pressure assembly mounted on an upper die base. Because the punch and the lower die insert are relatively perpendicular, and the punch's tilt angle matches the oblique movement angle of the mounting component, the punch effectively ensures vertical penetration of the sheet metal workpiece's inclined surface as it moves with the spring-loaded oblique punching structure. This prevents the punch from tilting the inner diameter cross-section, enabling normal punching of the workpiece's inclined surface.

[0017] The lifting guide pillar connects the upper die base and the pressure plate, allowing the pressure plate insert to firmly press the workpiece against the lower die plate when the punch is punching the inclined surface of the workpiece. This prevents the punch from affecting the inclined surface and the inner diameter of the punch during operation, effectively protecting the shape and structure of the inclined surface and the punched area, and improving the yield rate. Furthermore, by uniformly replacing the V-shaped guide blocks, guide wear plates, clamping plates, and lower die cutting edge inserts with the same tilt angle, the tilt angle of the punch can be flexibly adjusted to adapt to punching sheet metal parts with different tilt angles, demonstrating high flexibility and adaptability.

[0018] This invention achieves normal punching of the inclined portion of sheet metal parts by synchronously moving the punch and the mounting part on an inclined plane. It eliminates the need for manual adjustment of the punching angle, making it convenient to operate and highly efficient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the upper and lower die structures in their non-working state when no punching process is performed.

[0020] Figure 2 This is a schematic diagram showing the working state of the upper and lower die structures during punching processing according to this utility model.

[0021] Figure 3 This is a schematic diagram of the upper mold structure component of this utility model;

[0022] Figure 4 This is a schematic diagram of the lower mold structure component of this utility model;

[0023] Figure 5 This is a schematic diagram of the process component structure of this utility model;

[0024] 1. Upper die structure; 2. Lower die structure; 3. Upper die base; 4. Spring oblique punching structure; 5. Pressure plate assembly; 6. Lower die base; 7. Oblique guide structure; 8. Lower template; 9. Mounting parts; 10. L-shaped guide block; 11. Slide groove; 12. Slider; 13. Slider wear plate; 14. Nitrogen spring; 15. Spring top block; 16. Limiting block; 17. Silencer; 18. Silencer groove; 19. Long protrusion; 20. Short protrusion; 21. V-shaped guide block; 22. Return hook; 23. Shim; 24. Clamping plate; 25. Clamping plate insert; 26. Punch; 27. Pressure plate; 28. Pressure plate insert; 29. ​​Punching slot; 30. Lifting guide column; 31. Guide seat; 32. Guide wear plate; 33. Groove; 34. Positioning pin; 35. Lower die cutting edge insert; A. Process parts. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1-5 A hook-shaped suspended sheet metal 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, on the bottom surface of which a horizontally movable spring-loaded oblique punching structure 4 and a vertically movable pressure assembly 5 are mounted. The lower die structure 2 includes a lower die base 6, on the top of which an oblique guide structure 7 and a lower template 8 are mounted. The lower template 8 is located directly below the pressure assembly 5, and the top of the lower template 8 and the bottom of the pressure assembly 5 form a sheet metal positioning and clamping structure with interlocking features. The oblique guide structure 7 is located directly below the spring-loaded oblique punching structure 4, and the spring-loaded oblique punching structure 4 and the oblique guide structure 7 slide in contact to form a hook-shaped suspended positioning and punching structure for the sheet metal.

[0027] The spring-loaded oblique punching structure 4 includes a mounting component 9. Two L-shaped guide blocks 10 are symmetrically fixed to the bottom of the upper die base 3, forming a groove 11 between the two L-shaped guide blocks 10. A slider 12 is provided on the top of the mounting component 9, and the mounting component 9 is slidably mounted on the groove 11 via the slider 12. A wear-resistant plate 13 is installed on the top of the slider 12 to protect it and reduce wear during sliding.

[0028] A spring top block 15 is installed at the bottom of the upper mold base 3 on one side of the mounting component 9, and a limiting block 16 is installed at the bottom of the upper mold base 3 on the other side of the mounting component 9. Two nitrogen springs 14 are provided on the side of the spring top block 15 facing the mounting component 9, and the movable ends of the nitrogen springs 14 contact the mounting component 9. A silencer 17 is provided on the side of the limiting block 16 facing the mounting component 9, and a silencer groove 18 is provided on the side of the mounting component 9. The silencer 17 extends into the silencer groove 18 and contacts the mounting component 9. The silencer 17 is a polyurethane silencer 17, which provides a buffering and noise reduction effect when the nitrogen springs 14 reset the mounting component 9.

[0029] The mounting component 9 has a long protruding end 19 and a short protruding end 20 at its bottom ends. The inward-facing side of the long protruding end 19 is a slope one, on which a V-shaped guide block 21 is installed. Both sides of the long protruding end 19 are equipped with return hooks 22. The bottom surface of the short protruding end 20 is a slope two, on which a punching assembly is installed.

[0030] The punching assembly includes a gasket 23 mounted on the inclined plane 2, a clamping plate 24 fixedly mounted on the gasket 23, the clamping plate 24 having a hollow center, and a clamping plate insert 25 disposed within the hollow center, on which a punch 26 is mounted. Both the clamping plate 24 and the clamping plate insert 25 are fixed to the short protruding end 20 by screws passing through the gasket 23.

[0031] The pressing assembly 5 includes a pressing plate 27. The top of the pressing plate 27 is provided with a lifting guide post 30 that is movably connected to the upper mold base 3. The bottom of the pressing plate 27 is provided with a pressing plate insert 28. The pressing plate insert 28 is provided with a punching slot 29. The punching slot 29 is located directly below the punch 26 and the clamping plate 24.

[0032] The oblique guide structure 7 includes a guide seat 31, the outer side of which is an inclined surface three. A guide wear-resistant plate 32 is mounted on the inclined surface three. A hook groove is provided between the guide wear-resistant plate 32 and the inclined surface three. The end of the return hook 22 opposite to the long protrusion 19 is slidably engaged with the groove 33. The inclination angles of the relative surfaces of the guide wear-resistant plate 32 and the V-shaped guide block 21, as well as the inclination angle of the punch 26, are the same, so that the V-shaped guide block 21 can fit against the inclined surface of the guide wear-resistant plate 32 and move at a fixed inclination angle. At the same time, the punch 26 can perform oblique punching on the sheet metal at the same moving angle as the V-shaped guide block 21.

[0033] The side of the guide wear-resistant plate 32 facing the V-shaped guide block 21 is a V-shaped convex surface, and the side of the V-shaped guide block 21 facing the guide wear-resistant plate 32 is a V-shaped concave surface. The V-shaped convex surface and the V-shaped concave surface slide in corresponding contact. This serves as a guide, preventing positional or angular deviations when the V-shaped guide block 21 contacts and slides with the guide wear-resistant plate 32.

[0034] The lower template 8 is located directly below the pressure plate 27. The lower template 8 is equipped with several positioning pins 34 and a lower die insert 35, which is located directly below the punching slot 29. Four positioning pins 34 are provided to position the sheet metal and pressure plate insert 28, ensuring the accuracy of the punching position of the punch 26. The lower die insert 35 is installed at an angle on the lower template 8, with the same angle as the punch 26, serving to detect and position the punching angle of the punch 26. The punching angle can be adjusted by uniformly replacing the V-shaped guide block 21, guide wear plate 32, clamping plate 24, and lower die insert 35 with the same angle of inclination.

[0035] In use, the workpiece is placed on the lower template 8, and the positioning pin 34 positions the workpiece. The upper mold base 3 moves downward, causing the spring-loaded oblique punching structure 4 and the pressure assembly 5 to move downward together until the pressure plate insert 28 presses the workpiece onto the lower template 8. Through the extension and retraction of the lifting guide column 30, the pressure plate insert 28 and the pressure plate 27 stop moving downward without affecting the continued downward movement of the upper mold base 3. The spring-loaded oblique punching structure 4 continues to move downward with the upper mold base 3. The V-shaped guide block 21 on the mounting part 9 contacts the guide wear-resistant plate 32 on the guide seat 31 and moves obliquely, causing the punching assembly to move obliquely synchronously. During this process, the slide groove 11 provides space for the horizontal movement of the mounting part 9, while the mounting part 9 compresses the nitrogen spring 14. The punch 26 is relatively perpendicular to the lower mold cutting edge insert 35, and the tilt angle of the punch 26 is the same as the angle of oblique movement of the mounting part 9. When the end of the hook 22 is engaged in the groove 33, it is the lowest position of the upper die base 3 in oblique movement. At this time, the punch 26 penetrates the workpiece to complete the normal punching of the oblique surface, and the end of the punch 26 extends into the lower die cutter insert 35. After the workpiece is formed by oblique punching, the upper die base 3 begins to move upward. At the same time, the nitrogen spring 14 is reset and popped out, causing the slider 12 to return to its original position in the slide groove 11. Then, the spring oblique punching structure 4 as a whole performs an oblique upward movement in the opposite direction of the oblique downward movement. During the reset of the spring oblique punching structure 4, the pressure assembly 5 still presses the workpiece on the lower die plate 8 to prevent the punch 26 from moving the workpiece and affecting the punching shape when it is reset. When the punch 26 is completely disengaged from the lower die cutter insert 35 and the punching of the workpiece, it is the maximum extension length of the lifting guide post 30. At this time, the pressure assembly 5 moves upward and resets together with the upper die base 3 to complete the stamping process of the workpiece.

[0036] This utility model achieves normal punching of the inclined part of the sheet metal workpiece by synchronously moving the punch 26 and the mounting part 9 on the inclined surface. It eliminates the need for manual adjustment of the punching angle, making it convenient to operate and highly efficient. It also effectively improves the accuracy of the spring inclined punching structure 4 when it moves.

[0037] 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.

[0038] 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 barb suspended sheet metal piercing die comprising an upper die structure (1) and a lower die structure (2), characterized in that, The upper mold structure (1) includes an upper mold base (3), on the bottom surface of which a horizontally movable spring oblique punching structure (4) and a vertically lifting pressure assembly (5) are installed. The lower mold structure (2) includes a lower mold base (6), on the top of which an oblique guide structure (7) and a lower template (8) are installed. The lower template (8) is located directly below the pressure assembly (5), and the oblique guide structure (7) is located directly below the spring oblique punching structure (4).

2. The barbed, suspended sheet metal piercing die of claim 1, wherein, The spring oblique punching structure (4) includes a mounting part (9). The bottom of the upper die base (3) is symmetrically fixed with two L-shaped guide blocks (10). A groove (11) is formed between the two L-shaped guide blocks (10). The top of the mounting part (9) is provided with a slider (12). The mounting part (9) is slidably mounted on the groove (11) by the slider (12).

3. The barbed, suspended sheet metal piercing die of claim 2, wherein, A spring top block (15) is installed at the bottom of the upper mold base (3) on one side of the mounting component (9), and a limit block (16) is installed at the bottom of the upper mold base (3) on the other side of the mounting component (9). The spring top block (15) has two nitrogen springs (14) on the side facing the mounting component (9). The movable end of the nitrogen spring (14) is in contact with the mounting component (9). The limit block (16) has a silencer (17) on the side facing the mounting component (9). The mounting component (9) has a silencer groove (18) on its side. The silencer (17) extends into the silencer groove (18) and is in contact with the mounting component (9).

4. The barbed, suspended sheet metal piercing die of claim 3, wherein, The mounting component (9) has a long protruding end (19) and a short protruding end (20) at its bottom ends. The inward side of the long protruding end (19) is a slope one, on which a V-shaped guide block (21) is installed. Both sides of the long protruding end (19) are equipped with return hooks (22). The bottom surface of the short protruding end (20) is a slope two, on which a punching assembly is installed.

5. The barbed, suspended sheet metal piercing die of claim 4, wherein, The punching assembly includes a gasket (23) mounted on the inclined plane 2. A clamping plate (24) is fixedly mounted on the gasket (23). The clamping plate (24) has a hollow middle section and a clamping plate insert (25) is provided inside the hollow section. A punch (26) is mounted on the clamping plate insert (25).

6. The barbed, suspended sheet metal piercing die of claim 5, wherein, The pressing assembly (5) includes a pressing plate (27). The top of the pressing plate (27) is provided with a lifting guide post (30) which is movably connected to the upper mold base (3). The bottom of the pressing plate (27) is provided with a pressing plate insert (28). The pressing plate insert (28) is provided with a punching slot (29). The punching slot (29) is located directly below the punch (26) and the clamping plate (24).

7. The barbed, suspended sheet metal piercing die of claim 6, wherein, The oblique guide structure (7) includes a guide seat (31), the outer side of the guide seat (31) is an oblique surface three, a guide wear-resistant plate (32) is installed on the oblique surface three, a hook groove is provided between the guide wear-resistant plate (32) and the oblique surface three, and the end of the return hook (22) opposite to the long protrusion end (19) is slidably fastened to the groove (33).

8. The barbed suspension sheet metal punching die according to claim 7, characterized in that, The side of the guide wear-resistant plate (32) facing the V-shaped guide block (21) is a V-shaped convex surface, and the side of the V-shaped guide block (21) facing the guide wear-resistant plate (32) is a V-shaped concave surface. The V-shaped convex surface and the V-shaped concave surface slide in contact with each other.

9. The barbed, suspended sheet metal piercing die of claim 6, wherein, The lower template (8) is located directly below the pressure plate (27). The lower template (8) is provided with several positioning pins (34). The lower template (8) is also equipped with a lower die cutting edge insert (35), and the lower die cutting edge insert (35) is located directly below the punching slot (29).

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