A double-action drawing anti-cracking structure

Abstract

The utility model discloses a kind of double-action draw-drawing anti-cracking structures, it is related to mould technical field, including upper die and lower die, upper die contains upper die holder, its bottom end is equipped with upper die fixed plate, inside has upper die gas spring, telescopic end is connected with upper die forming plate, and there is upper die forming die core in forming plate;Lower die contains lower die holder, top end is equipped with lower die fixed plate, inside has lower die gas spring, telescopic end is connected with lower die forming plate, and there is lower die forming die core in forming plate.The structure is by the interaction of upper die forming plate and lower die forming plate Synchronous contraction of upper and lower die gas spring, realize the double-action draw-drawing structure of relative floating forming plate, can be according to the actual deformation condition of plate adaptive adjustment pressure and position, evenly disperse the stress suffered by plate, effectively avoid local stress concentration, significantly reduce the cracking risk of product in draw-drawing forming process, substantially improve product forming quality and production yield.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a structure for preventing cracking during double-action drawing. Background Technology

[0002] In sheet metal stamping and drawing processes, product cracking has always been a key challenge restricting production efficiency and finished product quality. Traditional drawing dies often lack a flexible adjustment mechanism for the force applied to the sheet metal by the upper and lower forming plates during the forming process.

[0003] During the drawing process, the stress on different parts of the sheet metal is complex and varied. Traditional molds apply force to the sheet metal in a fixed manner, which can easily lead to excessive or insufficient stress in certain areas. In areas with excessive stress, the sheet metal is prone to cracking or even breaking due to overstretching; in areas with insufficient stress, it may not be able to deform sufficiently, affecting the forming effect. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a structure for preventing cracking during double-action drawing.

[0005] The present invention proposes a structure for preventing cracking during double-action drawing, comprising an upper die and a lower die. The upper die includes an upper die base, an upper die fixing plate is installed at the bottom of the upper die base, an upper die gas spring is installed inside the upper die fixing plate, and the telescopic end of the upper die gas spring extends to the bottom of the upper die fixing plate and is connected to the upper die forming plate. The lower mold includes a lower mold base, a lower mold fixing plate is installed at the top of the lower mold base, a lower mold gas spring is installed inside the lower mold fixing plate, and the telescopic end of the lower mold gas spring extends to the top of the lower mold fixing plate and is connected to the lower mold forming plate.

[0006] Furthermore, the bottom end of the upper mold forming plate and the top end of the lower mold forming plate are configured with matching inclined structures. The upper mold forming core is installed inside the upper mold forming plate, and the lower mold forming core is installed inside the lower mold forming plate. The upper mold forming core and the lower mold forming core are complementary structures that are compatible with each other.

[0007] Furthermore, an upper mold guide post is installed at the bottom of the upper mold base, and a lower mold guide sleeve that matches the upper mold guide post is installed at the top of the lower mold base. After the upper and lower molds are closed, the upper mold guide post is inserted into the lower mold guide sleeve.

[0008] Furthermore, limiting posts are installed at the bottom of the upper mold base and the top of the lower mold base, and sliding grooves adapted to the limiting posts are opened on both sides of the upper mold forming plate and the lower mold forming plate.

[0009] Furthermore, the upper mold fixing plate is equipped with an upper mold spring pin, and the lower mold fixing plate is equipped with a lower mold spring pin. The telescopic ends of the upper mold spring pin and the lower mold spring pin are adjacent to each other so as to jointly clamp the product when the upper mold and the lower mold are closed.

[0010] Furthermore, the top of the lower mold forming plate is respectively equipped with a limiting block and a positioning protrusion to constrain the product when it is placed in. The upper mold forming plate has a notch to avoid the limiting block and positioning protrusion when the upper and lower molds are closed.

[0011] The beneficial effects of this utility model are as follows: the interaction force between the upper and lower die forming plates causes the upper and lower die air springs to contract synchronously, realizing a double-action drawing structure with relatively floating forming plates. This structure can adaptively adjust the pressure and position according to the actual deformation of the sheet material, evenly disperse the stress on the sheet material, effectively avoid local stress concentration, significantly reduce the risk of cracking during the drawing process, and greatly improve the product forming quality and production yield. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the disassembled structure of this utility model; Figure 2 This is a schematic diagram of the upper mold in this utility model; Figure 3 This is a schematic diagram of the lower mold structure of this utility model; Figure 4 This is a cross-sectional view of the product formed after the upper and lower molds are closed in this utility model.

[0013] In the diagram: 1. Upper mold; 11. Upper mold base; 12. Upper mold fixing plate; 13. Upper mold gas spring; 14. Upper mold forming plate; 15. Upper mold forming core; 16. Upper mold guide post; 17. Limiting post; 18. Slide groove; 19. Upper mold spring pin; 2. Lower mold; 21. Lower mold base; 22. Lower mold fixing plate; 23. Lower mold gas spring; 24. Lower mold forming plate; 25. Lower mold forming core; 26. Lower mold guide sleeve; 27. Lower mold spring pin; 28. Limiting block; 29. ​​Positioning protrusion; 3. Product. Detailed Implementation

[0014] Reference Figure 1-4 This utility model proposes a dual-action drawing anti-cracking structure, mainly composed of an upper die 1 and a lower die 2. The upper die 1 and the lower die 2 cooperate with each other, and through their respective internal components such as gas springs, forming cores, guide pillars and guide sleeves, limiting pillars, spring pins, limiting blocks and positioning protrusions, they achieve dual-action drawing forming of product 3, effectively preventing product 3 from cracking during the drawing process. The specific technical solution is as follows: The upper mold 1 includes an upper mold base 11. The bottom end of the upper mold base 11 is fitted with an upper mold fixing plate 12 by fasteners such as bolts. The upper mold fixing plate 12 has an installation groove inside. The upper mold gas spring 13 is installed in the installation groove. The telescopic end of the upper mold gas spring 13 extends to the bottom of the upper mold fixing plate 12 and is fixedly connected to the upper mold forming plate 14 by means of threaded connection or other means. The upper mold forming plate 14 also has an installation groove inside. The upper mold forming core 15 is installed in the installation groove. The shape of the upper mold forming core 15 is designed according to the specific shape of the product 3 and forms a complementary structure with the lower mold forming core 25. The bottom end of the upper mold base 11 is also bolted with upper mold guide pillars 16. The upper mold guide pillars 16 are evenly distributed around the bottom end of the upper mold base 11. At the same time, the bottom end of the upper mold base 11 is also bolted with limiting pillars 17. The upper mold fixing plate 12 is also installed with upper mold spring nails 19. The lower mold 2 includes a lower mold base 21. The top of the lower mold base 21 is fitted with a lower mold fixing plate 22 by fasteners such as bolts. The lower mold fixing plate 22 has an installation groove inside, and the lower mold gas spring 23 is installed in the installation groove. The telescopic end of the lower mold gas spring 23 extends to the top of the lower mold fixing plate 22 and is fixedly connected to the lower mold forming plate 24 by means of threaded connection or other means. The lower mold forming plate 24 also has an installation groove inside, and the lower mold forming core 25 is installed in the installation groove. The shape of the lower mold forming core 25 is adapted to the upper mold forming core 15 to jointly complete the product forming. The top of the lower mold base 21 is also bolted with a lower mold guide sleeve 26 that is compatible with the upper mold guide post 16. The position of the lower mold guide sleeve 26 corresponds to the upper mold guide post 16, ensuring that the upper mold 1 and the lower mold 2 can be accurately closed. At the same time, the top of the lower mold base 21 is also bolted with a limiting post 17, the position of which corresponds to the limiting post 17 at the bottom of the upper mold base 11. Both sides of the upper mold forming plate 14 and the lower mold forming plate 24 are provided with sliding grooves 18 that are adapted to the limiting posts 17. The limiting posts 17 slide in the sliding grooves 18. The lower mold fixing plate 22 is also equipped with lower mold spring pins 27. The number of lower mold spring pins 27 corresponds to the upper mold spring pins 19 and is evenly distributed inside the lower mold fixing plate 22. The top of the lower mold forming plate 24 is respectively equipped with limiting blocks 28 and positioning protrusions 29 by bolts. The number and position of the limiting blocks 28 and positioning protrusions 29 are determined according to the shape of the product and the positioning requirements. The upper mold forming plate 14 is provided with notches to avoid the limiting blocks 28 and positioning protrusions 29 when the upper mold 1 and the lower mold 2 are closed.

[0015] The working process of this structure: 1. Place the product 3 to be drawn on the lower die forming plate 24, and use the limiting block 28 and the positioning protrusion 29 to position and constrain the product 3 to be drawn to ensure that the product 3 to be drawn is placed accurately. 2. Start the equipment to make the upper mold 1 move downward. The upper mold guide post 16 first contacts the lower mold guide sleeve 26 to play a guiding role and ensure that the upper mold 1 and the lower mold 2 are accurately closed. 3. As the upper mold 1 continues to press down, the upper mold forming plate 14 and the lower mold forming plate 24 apply clamping force to the product 3 under the action of the upper mold gas spring 13 and the lower mold gas spring 23, respectively, for pre-fixation. The product gradually forms under the combined action of the upper mold forming core 15 and the lower mold forming core 25. At the same time, the upper mold spring pin 19 and the lower mold spring pin 27 retract synchronously, but always maintain the state of jointly clamping the product. 4. During the movement of the upper die 1 and the lower die 2, due to the interaction force between the upper die forming plate 14 and the lower die forming plate 24, the upper die gas spring 13 and the lower die gas spring 23 contract synchronously, thereby realizing that the upper die forming plate 14 and the lower die forming plate 24 are relatively floating, realizing double-action drawing, which can effectively prevent the product 3 from cracking during the drawing process. During this process, the limiting post 17 slides in the slide groove 18. 5. After the drawing process is completed, the upper die 1 moves upward, the upper die guide post 16 separates from the lower die guide sleeve 26, the upper die gas spring 13 and the lower die gas spring 23 return to their natural state, the upper die forming plate 14 and the lower die forming plate 24 return to their initial positions, the formed product is taken out, and one drawing process is completed.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structure for preventing cracking during double-action drawing, comprising an upper die (1) and a lower die (2), characterized in that, The upper mold (1) includes an upper mold base (11), an upper mold fixing plate (12) is installed at the bottom of the upper mold base (11), an upper mold gas spring (13) is installed inside the upper mold fixing plate (12), and the telescopic end of the upper mold gas spring (13) extends to the bottom of the upper mold fixing plate (12) and is connected to the upper mold forming plate (14). The lower mold (2) includes a lower mold base (21), a lower mold fixing plate (22) is installed at the top of the lower mold base (21), a lower mold gas spring (23) is installed inside the lower mold fixing plate (22), and the telescopic end of the lower mold gas spring (23) extends to the top of the lower mold fixing plate (22) and is connected to the lower mold forming plate (24).

2. The structure for preventing cracking during double-action drawing according to claim 1, characterized in that, The bottom end of the upper mold forming plate (14) and the top end of the lower mold forming plate (24) are configured with matching inclined structures. The upper mold forming core (15) is installed inside the upper mold forming plate (14), and the lower mold forming core (25) is installed inside the lower mold forming plate (24). The upper mold forming core (15) and the lower mold forming core (25) are matching complementary structures.

3. The structure for preventing cracking during double-action drawing according to claim 1, characterized in that, The bottom end of the upper mold base (11) is also equipped with an upper mold guide post (16), and the top end of the lower mold base (21) is also equipped with a lower mold guide sleeve (26) that is compatible with the upper mold guide post (16). After the upper mold (1) and the lower mold (2) are closed, the upper mold guide post (16) is inserted into the lower mold guide sleeve (26).

4. The structure for preventing cracking during double-action drawing according to claim 1, characterized in that, Limiting posts (17) are installed at the bottom of the upper mold base (11) and the top of the lower mold base (21). Slide grooves (18) adapted to the limiting posts (17) are opened on both sides of the upper mold forming plate (14) and the lower mold forming plate (24).

5. The structure for preventing cracking during double-action drawing according to claim 1, characterized in that, The upper mold fixing plate (12) is equipped with an upper mold spring nail (19), and the lower mold fixing plate (22) is equipped with a lower mold spring nail (27). The telescopic ends of the upper mold spring nail (19) and the lower mold spring nail (27) are adjacent to each other so as to clamp the product together when the upper mold (1) and the lower mold (2) are closed.

6. The structure for preventing cracking during double-action drawing according to claim 1, characterized in that, The top of the lower mold forming plate (24) is respectively equipped with a limiting block (28) and a positioning protrusion (29) to constrain the product when it is placed in. The upper mold forming plate (14) has a notch to avoid the limiting block (28) and the positioning protrusion (29) when the upper mold (1) and the lower mold (2) are closed.

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