A bending die

Abstract

A bending die includes an upper die portion and a lower die portion. The upper die portion includes an upper template and an upper die bevel. The lower die portion includes a lower stripper plate, a lower pad plate, a lower die bevel, and a lower clamping plate. The lower stripper plate moves vertically on the lower pad plate, and the lower die bevel is set on the lower clamping plate. The lower clamping plate elastically moves on the lower die portion. When the upper die portion moves downward, the upper die bevel acts on the lower die bevel to push the lower clamping plate to move in a first direction. When the upper die bevel moves downward to the corresponding position, the upper template presses the workpiece onto the lower stripper plate to push the lower stripper plate downward. When the lower stripper plate moves downward to the corresponding position, it is positioned on the lower pad plate to achieve workpiece bending. When the upper die portion moves upward to reset, the upper die bevel disengages from the lower die bevel, and the lower clamping plate elastically resets in a second direction. This bending die can realize side-push bending with material pressing action, enabling the product to achieve material pressing, bending, and material unloading functions in one operation when there is a downward bending undercut.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a bending mold. Background Technology

[0002] The bending of products is generally accomplished by bending dies. For products that only bend upwards, bending dies can perform the functions of pressing, bending, and unbending in one go. However, if the product also has a downward bending part with undercuts, the bending die cannot perform the functions of pressing, bending, and unbending in one go when bending the product upwards. Moreover, it is more difficult to produce such products, resulting in a low yield.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to provide a bending die with simple structure, high production efficiency, high yield, good product quality and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A bending die designed for this purpose includes an upper die part and a lower die part. The upper die part includes an upper template and an upper die bevel; the lower die part includes a lower stripper plate, a lower pad plate, a lower die bevel, and a lower clamping plate. The lower stripper plate moves vertically on the lower pad plate, and the lower die bevel is set on the lower clamping plate, which elastically moves on the lower die part. When the upper die part moves downward, the upper die bevel acts on the lower die bevel to push the lower clamping plate to move in a first direction. When the upper die bevel moves downward to the corresponding position, the upper template presses the workpiece onto the lower stripper plate to push the lower stripper plate downward. When the lower stripper plate moves downward to the corresponding position, it is positioned on the lower pad plate to achieve workpiece bending. When the upper die part moves upward to reset, the upper die bevel disengages from the lower die bevel, and the lower clamping plate elastically resets in a second direction.

[0006] The upper template is equipped with a movable block that mates with the boss of the workpiece. The movable block moves up and down on the upper template, and the lower clamping plate is equipped with a stripper block that moves up and down. When the upper die moves downward at an angle to the corresponding position, the movable block presses the bent part of the workpiece onto the stripper block, thereby pushing the stripper block downward.

[0007] The upper die has a first inclined surface, and the lower die has a second inclined surface. When the upper die moves downward, the upper die acts on the second inclined surface of the lower die through the first inclined surface to push the lower clamping plate to move in the first direction.

[0008] The lower die has a straight section. When the upper die moves downward to the straight section of the lower die, the upper die plate presses the workpiece onto the lower stripper plate.

[0009] The lower clamping plate is equipped with a bending fitting. When the upper template pushes the lower stripper plate downward, the upper template, the lower stripper plate and the bending fitting cooperate with each other to bend the workpiece.

[0010] The lower mold part also includes a fixing block, and a first elastic element is provided between the fixing block and the lower clamping plate. When the upper mold is obliquely cut away from the lower mold obliquely cut, the lower clamping plate is reset in the second direction under the elastic force of the first elastic element.

[0011] The lower mold part also includes a lower mold base, a lower pad plate is fixed on the lower mold base, and a second elastic element is provided on the lower pad plate. The second elastic element is located between the lower stripper plate and the lower mold base. When the upper mold part moves upward to reset, the upper mold plate disengages from the lower stripper plate, and the lower stripper plate moves upward to reset under the elastic force of the second elastic element.

[0012] The lower stripper plate is equipped with guide posts, and the lower pad plate is equipped with guide holes. When the lower stripper plate moves up and down, the guide posts move up and down on the guide holes.

[0013] A third elastic element is provided between the stripper block and the lower clamping plate. When the upper mold part moves upward to reset, the movable block disengages from the stripper block, and the stripper block moves upward to reset under the elastic force of the third elastic element.

[0014] The movable block is provided with a third inclined surface, and the upper template is provided with a fourth inclined surface. When the movable block pushes the stripper block downward, the movable block moves upward relative to the upper template through the cooperation of the third and fourth inclined surfaces under the action of the boss. When the upper mold part moves upward to reset, the movable block moves downward relative to the upper template through the cooperation of the third and fourth inclined surfaces under the action of the boss.

[0015] The bending die of this utility model achieves the action of side-push bending with material pressing by cooperating with the upper template, the upper die oblique cut, the lower stripper plate, the lower pad plate, the lower die oblique cut, and the lower clamping plate. It can realize the functions of material pressing, bending and material unloading in one go when the product has a downward bending undercut, which is convenient for bending and material removal, meets production requirements, and improves the yield of products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the mold in one embodiment of the present invention.

[0017] Figure 2 This is an exploded cross-sectional view of the mold in one embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of the overall structure of the mold in one embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view of the mold from another position in one embodiment of the present invention.

[0020] Figure 5 for Figure 4 A magnified structural diagram at point C.

[0021] Figure 6 This is a cross-sectional view of the assembly structure of the lower stripper plate and the lower pad plate in one embodiment of the present invention.

[0022] Figure 7 This is a cross-sectional view of the assembly structure of the fixing block and the lower clamping plate in one embodiment of the present invention.

[0023] Figure 8 This is an exploded structural diagram of the upper template and the movable block in one embodiment of the present invention.

[0024] Figure 9 This is a schematic diagram of the overall structure of the workpiece after bending in one embodiment of the present invention.

[0025] Figure 10 This is a schematic diagram of the overall structure of the workpiece before bending in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See Figures 1-10 This bending die includes an upper die part 1 and a lower die part 2. The upper die part 1 includes an upper template 3 and an upper die bevel 4. The lower die part 2 includes a lower stripper plate 5, a lower pad plate 6, a lower die bevel 7, and a lower clamping plate 8. The lower stripper plate 5 moves up and down on the lower pad plate 6. The lower die bevel 7 is set on the lower clamping plate 8, which elastically moves on the lower die part 2. During production, the upper die part 1 moves downward under the action of the punch press. When the upper die bevel 4 touches the lower die bevel 7, it pushes the lower clamping plate 8 to move in the first direction A (i.e., to the left). When the upper die bevel 4 moves downward to the corresponding position (i.e., the upper die bevel 4 reaches the straight position 30 of the lower die bevel 7), the upper template... 3. Press the workpiece 9 onto the lower stripper plate 5. The punch press continues to drive the upper die part 1 to move downward, so as to push the lower stripper plate 5 to move downward. When the lower stripper plate 5 moves downward to the corresponding position, it is located on the lower pad plate 6 (that is, when the lower stripper plate 5 touches the lower pad plate 6), so as to realize the upward bending of the workpiece 9 and form the upper bending part 27. After the product is bent, the punch press drives the upper die part 1 to move upward to reset. The upper die oblique cut 4 is separated from the lower die oblique cut 7. The lower clamping plate 8 is pushed by the first elastic element 17 on the side to reset in the second direction B (that is, move to the right), thereby avoiding the lower bending buckle 25 of the workpiece 9 and successfully completing the bending and material removal. The lower bending buckle 25 is formed by the previous process.

[0028] The upper template 3 is provided with a movable block 11 that cooperates with the boss 10 of the workpiece 9. The movable block 11 moves up and down on the upper template 3. The lower clamping plate 8 is provided with a stripper block 12 that moves up and down. When the upper die beveling 4 moves down to the corresponding position (that is, when the upper die beveling 4 reaches the straight position 30 of the lower die beveling 7), the movable block 11 presses the bent part of the workpiece 9 onto the stripper block 12 to push the stripper block 12 to move down. The stripper block 12 and the stripper plate 5 move down synchronously. The movable block 11 is provided with a groove 26 that cooperates with the boss 10.

[0029] The upper die bevel 4 is provided with a first bevel 13, and the lower die bevel 7 is provided with a second bevel 14. When the upper die part 1 moves downward, the upper die bevel 4 acts on the second bevel 14 of the lower die bevel 7 through the first bevel 13 to push the lower clamping plate 8 to move in the first direction A.

[0030] The lower die oblique cutter 7 is provided with a straight body position 30, which is located below the second oblique surface 14. When the upper die oblique cutter 4 moves downward to the straight body position 30 of the lower die oblique cutter 7, the upper template 3 presses the workpiece 9 onto the lower stripper plate 5.

[0031] The lower clamping plate 8 is provided with a bending fitting 15. When the upper template 3 pushes the lower stripper plate 5 downward, the upper template 3, the lower stripper plate 5 and the bending fitting 15 cooperate with each other to bend the workpiece 9.

[0032] The lower die part 2 also includes a fixing block 16. A first elastic element 17 is provided between the fixing block 16 and the lower clamping plate 8. The first elastic element 17 is a nitrogen spring. When the upper die oblique cut 4 is separated from the lower die oblique cut 7, the lower clamping plate 8 is reset to the second direction B under the elastic force of the first elastic element 17. When the lower clamping plate 8 moves to the first direction A, it compresses the first elastic element 17. The first elastic element 17 is located on the left side of the lower clamping plate 8. After the lower clamping plate 8 moves left and right, the lower bending buckle 25 is always located on the left side of the lower clamping plate 8. Therefore, the lower bending buckle 25 of the workpiece 9 can be avoided, and the functions of pressing, bending and unloading can be realized at one time.

[0033] The lower die part 2 also includes a lower die base 18, which is fixed on the punch press. The lower pad 6 is fixed on the lower die base 18. A second elastic element 19 is provided on the lower pad 6. The second elastic element 19 is a nitrogen spring and is located between the lower stripper plate 5 and the lower die base 18. When the upper die part 1 moves upward to reset, the upper die plate 3 disengages from the lower stripper plate 5. The lower stripper plate 5 moves upward to reset under the elastic force of the second elastic element 19. When the upper die plate 3 pushes the lower stripper plate 5 downward, it compresses the second elastic element 19.

[0034] The fixing block 16 is fixed on the lower mold base 18, and the lower clamping plate 8 is movably set on the lower mold base 18.

[0035] The lower stripper plate 5 is provided with a guide post 20, and the lower pad plate 6 is provided with a guide hole 21. When the lower stripper plate 5 moves up and down, the guide post 20 moves up and down on the guide hole 21.

[0036] A third elastic element 22 is provided between the stripper block 12 and the lower clamping plate 8. The third elastic element 22 is a nitrogen spring. When the upper mold part 1 moves upward to reset, the movable block 11 disengages from the stripper block 12. The stripper block 12 moves upward to reset under the elastic force of the third elastic element 22. The stripper block 12 and the stripper plate 5 move upward synchronously. When the stripper block 12 moves downward, it compresses the third elastic element 22.

[0037] The movable block 11 is provided with a third inclined surface 23, and the upper template 3 is provided with a fourth inclined surface 24. When the movable block 11 pushes the stripper block 12 downward, the movable block 11 moves upward relative to the upper template 3 under the action of the boss 10 through the cooperation of the third inclined surface 23 and the fourth inclined surface 24. When the upper mold part 1 moves upward to reset, the movable block 11 moves downward relative to the upper template 3 to reset under the action of the boss 10 through the cooperation of the third inclined surface 23 and the fourth inclined surface 24. This structure is designed to avoid the boss 10 of the workpiece 9 during pressing and unloading.

[0038] The upper die part 1 also includes an upper die base 28 and an upper pad 29. The upper die base 28 is connected to the power part of the punch press, the upper pad 29 is fixed on the upper die base 28, and the upper template 3 and the upper die bevel 4 are fixed on the upper pad 29.

[0039] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bending die, comprising an upper die portion (1) and a lower die portion (2), characterized in that: The upper mold part (1) includes an upper template (3) and an upper mold bevel (4), and the lower mold part (2) includes a lower stripper plate (5), a lower pad plate (6), a lower mold bevel (7), and a lower clamping plate (8). The lower stripper plate (5) moves up and down on the lower pad plate (6), and the lower mold bevel (7) is set on the lower clamping plate (8). The lower clamping plate (8) moves elastically on the lower mold part (2). When the upper mold part (1) moves downward, the upper mold bevel (4) acts on the lower mold bevel (7) to push the lower clamping plate (7). 8) When the upper die oblique cut (4) moves downward to the corresponding position, the upper template (3) presses the workpiece (9) onto the lower stripper plate (5) to push the lower stripper plate (5) downward. When the lower stripper plate (5) moves downward to the corresponding position, it is located on the lower pad plate (6) to achieve the bending of the workpiece (9). When the upper die part (1) moves upward to reset, the upper die oblique cut (4) disengages from the lower die oblique cut (7), and the lower clamping plate (8) elastically resets in the second direction (B).

2. The bending die according to claim 1, characterized in that: The upper template (3) is provided with a movable block (11) that cooperates with the boss (10) of the workpiece (9). The movable block (11) moves up and down on the upper template (3). The lower clamping plate (8) is provided with a stripping block (12) that moves up and down. When the upper die oblique cut (4) moves down to the corresponding position, the movable block (11) presses the bent part of the workpiece (9) onto the stripping block (12) to push the stripping block (12) down.

3. The bending die according to claim 1, characterized in that: The upper die bevel (4) is provided with a first inclined surface (13), and the lower die bevel (7) is provided with a second inclined surface (14). When the upper die part (1) moves downward, the upper die bevel (4) acts on the second inclined surface (14) of the lower die bevel (7) through the first inclined surface (13) to push the lower clamping plate (8) to move in the first direction (A).

4. The bending die according to claim 3, characterized in that: The lower die oblique cutter (7) has a straight body position (30). When the upper die oblique cutter (4) moves downward to the straight body position (30) of the lower die oblique cutter (7), the upper template (3) presses the workpiece (9) onto the lower stripper plate (5).

5. The bending die according to claim 1, characterized in that: The lower clamping plate (8) is provided with a bending fitting (15). When the upper template (3) pushes the lower stripper plate (5) downward, the upper template (3), the lower stripper plate (5) and the bending fitting (15) cooperate with each other to bend the workpiece (9).

6. The bending die according to claim 1, characterized in that: The lower mold part (2) also includes a fixing block (16). A first elastic element (17) is provided between the fixing block (16) and the lower clamping plate (8). When the upper mold oblique cut (4) is separated from the lower mold oblique cut (7), the lower clamping plate (8) is reset in the second direction (B) under the elastic force of the first elastic element (17).

7. The bending die according to claim 1, characterized in that: The lower mold part (2) also includes a lower mold base (18), a lower pad (6) fixed on the lower mold base (18), and a second elastic element (19) provided on the lower pad (6). The second elastic element (19) is located between the lower stripper plate (5) and the lower mold base (18). When the upper mold part (1) moves upward to reset, the upper mold plate (3) disengages from the lower stripper plate (5), and the lower stripper plate (5) moves upward to reset under the elastic force of the second elastic element (19).

8. The bending die according to claim 7, characterized in that: The lower stripper plate (5) is provided with a guide post (20), and the lower pad plate (6) is provided with a guide hole (21). When the lower stripper plate (5) moves up and down, the guide post (20) moves up and down on the guide hole (21).

9. The bending die according to claim 2, characterized in that: A third elastic element (22) is provided between the stripper block (12) and the lower clamping plate (8). When the upper mold part (1) moves upward to reset, the movable block (11) disengages from the stripper block (12), and the stripper block (12) moves upward to reset under the elastic force of the third elastic element (22).

10. The bending die according to claim 9, characterized in that: The movable block (11) is provided with a third inclined surface (23), and the upper template (3) is provided with a fourth inclined surface (24). When the movable block (11) pushes the stripping block (12) downward, the movable block (11) moves upward relative to the upper template (3) under the action of the boss (10) through the cooperation of the third inclined surface (23) and the fourth inclined surface (24). When the upper mold part (1) moves upward to reset, the movable block (11) moves downward relative to the upper template (3) under the action of the boss (10) through the cooperation of the third inclined surface (23) and the fourth inclined surface (24).

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