Stretching and back-jacking structure on progressive die

Abstract

The utility model relates to the technical field of dies, in particular to a stretching and back-ejecting structure on a progressive die, which comprises an elastic piece, an upper die holder, a stripper plate, a balance block, a rotating block, a lower die holder, an ejector rod body, an ejector rod fixing block, a fixing plate, a lower die blank holder, a blank holder insert and the like. A male die is arranged in the middle of the lower die base, a lower die blank holder is arranged on the lower portion of the male die in a sliding mode, an elastic piece is arranged between the lower die blank holder and the lower die base, ejector rod fixing blocks are arranged on the top of the lower die base in a bilateral symmetry mode, and grooves are formed in the positions, below the ejector rod fixing blocks, of the lower die base. When the stretching male retreats, the rotating block is designed between the stripper plate and the blank holder, the upper die base, the stretching male and the inner stripper completely move, and the stripper plate, the lower die blank holder and the blank holder insert core blank holder synchronously ascend to achieve the purposes that a thin strip is not pulled, and the strip material face is flush with the product face. And the rotating block is pressed by the stripping force to stop the blank holder from jacking back.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a stretching and returning top structure on a continuous mold. Background Art

[0002] The continuous die includes an upper die and a lower die. During operation, the punch is located between the upper die and the lower die. The upper die and the lower die are closed to extrude the punch, and the punch is stretched and deformed. The upper die and the lower die are opened, and the punch is demolded to obtain a drawn punch.

[0003] Generally, the stretching structure on the continuous die is that after the stretching is completed, the lower die pressure ring pushes the punch upward for a pressure ring stroke. Such a material strip must be a thin strip with material, and the punch is pushed up after the thin strip is deformed. The deformation of the thin strip is easy to cause the punch to shake, resulting in problems such as material jamming and unevenness. Therefore, a stretching and returning structure on the continuous die is designed, which uses the force of the stripping to press the rotating block to stop the pressure ring from returning to the top. Utility Model Content

[0004] In order to overcome the disadvantages of pushing up the punch through a thin strip, which may easily cause the punch to shake after deformation, thereby causing material jamming and unevenness, the technical problem of the utility model is to provide a stretching and returning top structure on a continuous die.

[0005] A structure for stretching and returning the top on a continuous die comprises an elastic part, an upper die seat, a stripping plate, a balancing block, a rotating block, a lower die seat, a push rod body, a push rod fixing block, a fixing plate, a lower die pressure ring, a pressure ring insert, a punch, a stretching male and an inner stripper, a punch is arranged in the middle of the lower die seat, a lower die pressure ring is slidably arranged at the lower part of the punch, an elastic part is arranged between the lower die pressure ring and the lower die seat, a push rod fixing block is symmetrically arranged at the top of the lower die seat, a groove is opened at the lower die seat position below the push rod fixing block, a push rod body is slidably arranged on the push rod fixing block, an elastic part is arranged between the lower part of the push rod body and the groove of the lower die seat, and the convex A pressure ring insert is provided on the upper part of the mold, a pressure ring insert is provided on the upper part of the lower mold pressure ring, the pressure ring insert is sleeved on the upper part of the punch, a fixed plate is symmetrically provided on the top of the lower mold pressure ring, and rotating blocks are rotatably provided on the fixed plates, a balancing block is symmetrically provided on the top of the lower mold base, an elastic part is symmetrically provided on the bottom of the upper mold base, a stripping plate is provided between the lower parts of the elastic parts, the balancing block is in contact with the stripping plate, a square hole is opened in the middle of the stripping plate, a stretching pin is symmetrically provided on the bottom of the upper mold base, the stretching pin is located in the square hole in the middle of the stripping plate, and an inner stripping pin is connected to the center of the bottom of the upper mold base through an elastic part, and the inner stripping pin is located between the two stretching pins.

[0006] Furthermore, the rotating block is rotatably mounted on the fixed plate via a rotating shaft.

[0007] Furthermore, the rotating block is cut in one step by wire cutting.

[0008] Furthermore, the elastic member is a compression spring.

[0009] The utility model designs a rotating block between the stripping plate and the edge pressing ring when the stretching male is withdrawn, the upper die seat, the stretching male and the inner stripping are completely moved, the stripping plate and the lower die edge pressing ring and the edge pressing ring are synchronously raised to achieve the purpose of not pulling a thin strip and making the strip surface and the product surface flush, and the stripping force is used to press the rotating block to stop the edge pressing ring from returning to the top. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a diagram of the mold being killed according to the utility model.

[0011] Figure 2 This is a diagram of the stretched and released state of the utility model.

[0012] Figure 3 This is a diagram of the mold opening state of the utility model.

[0013] Markings in the attached drawings: 1. elastic part, 2. upper die seat, 3. stripping plate, 4. balancing block, 5. rotating block, 6. lower die seat, 7. ejector rod body, 8. ejector rod fixing block, 9. fixing plate, 10. lower die pressure ring, 11. pressure ring insert, 12. punch, 13. stretching male, 14. inner stripping. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the protection scope and application scope of the present invention are not limited.

[0015] Example: Figure 1-3As shown, a structure for stretching and returning the top on a continuous die includes an elastic member 1, an upper die seat 2, a stripping plate 3, a balancing block 4, a rotating block 5, a lower die seat 6, a push rod body 7, a push rod fixing block 8, a fixing plate 9, a lower die pressure ring 10, a pressure ring insert 11, a punch 12, a stretching male 13 and an inner stripper 14. A punch 12 is arranged in the middle of the lower die seat 6, a lower die pressure ring 10 is slidably arranged at the lower part of the punch 12, an elastic member 1 is arranged between the lower die pressure ring 10 and the lower die seat 6, the elastic member 1 is a compression spring, and push rod fixing blocks 8 are symmetrically arranged on the top of the lower die seat 6 by screw connection on the left and right sides, a groove is opened at the position of the lower die seat 6 below the push rod fixing block 8, a push rod body 7 is slidably arranged on the push rod fixing block 8, an elastic member 1 is arranged between the lower part of the push rod body 7 and the groove of the lower die seat 6, the punch 12 is arranged between the lower part of the push rod body 7 and the groove of the lower die seat 6, A pressure ring insert 11 is provided on the upper part of the mold 12, and a pressure ring insert 11 is provided on the upper part of the lower mold pressure ring 10. The pressure ring insert 11 is sleeved on the upper part of the punch 12. A fixed plate 9 is symmetrically provided on the top of the lower mold pressure ring 10. The rotating block 5 is rotatably installed on the fixed plate 9 through a rotating shaft. The rotating block 5 is divided at one time by wire cutting. A balancing block 4 is symmetrically provided on the top of the lower mold base 6, and an elastic member 1 is symmetrically provided on the bottom of the upper mold base 2. A stripping plate 3 is provided between the lower parts of the elastic members 1. The balancing block 4 is in contact with the stripping plate 3. A square hole is opened in the middle of the stripping plate 3. A stretching male 13 is symmetrically provided on the bottom of the upper mold base 2. The stretching male 13 is located in the square hole in the middle of the stripping plate 3. The bottom center of the upper mold base 2 is connected with an inner stripper 14 through the elastic member 1, and the inner stripper 14 is located between the two stretching males 13.

[0016] When the upper die seat 2, the stretching male 13 and the inner stripping 14 descend to the balance block 4, the stripping plate 3 stops moving, and the upper die seat 2, the stretching male 13 and the inner stripping 14 continue to descend to press the product on the lower die pressing ring 10 and the pressing ring insert 11, and the elastic member 1 is deformed, and then continues to descend until there is about 14mm left before the end, and the rotating block 5 contacts the push rod to push the rotating block 5 up and make it flat with the stripping plate 3 plane, and the stretching is completed. The upper die seat 2, the stretching male 13 and the inner stripping 14 begin to release, and the stripping plate 3 presses the rotating block 5 to push the lower die pressing ring 10 and the pressing ring insert 11 under the action of the elastic force of the elastic member 1 to stop the return to the top, until the upper die seat 2, the stretching male 13 and the inner stripping 14 are completely gone, and the stripping plate 3 and the lower die pressing ring 10 and the pressing ring insert 11 press ring are synchronously raised to achieve the purpose of not pulling the thin strip and making the strip surface and the product surface flush.

[0017] Although the utility model is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications can be made to the utility model without departing from the principle and spirit of the utility model defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the utility model, but the scope of protection is limited by the content of the claims.

Claims

1. A stretching and returning top structure on a continuous die, characterized in that: The invention comprises an elastic member (1), an upper die seat (2), a stripping plate (3), a balancing block (4), a rotating block (5), a lower die seat (6), a push rod body (7), a push rod fixing block (8), a fixing plate (9), a lower die edge pressing ring (10), an edge pressing ring insert (11), a punch (12), a stretching male (13) and an inner stripping member (14). The middle part of the lower die seat (6) is provided with a punch (12), and the lower part of the punch (12) is provided with a lower die in a sliding manner. A pressure ring (10) is provided, an elastic member (1) is provided between the lower mold pressure ring (10) and the lower mold seat (6), a push rod fixing block (8) is symmetrically provided on the top of the lower mold seat (6), a groove is provided on the lower mold seat (6) below the push rod fixing block (8), a push rod body (7) is slidably provided on the push rod fixing block (8), an elastic member (1) is provided between the lower part of the push rod body (7) and the groove of the lower mold seat (6), and the upper part of the punch (12) is provided with a push rod body (7) and a push rod body (7) and a push rod body (7) and a push rod body (7) are provided. A pressure ring insert (11) is provided, and a pressure ring insert (11) is provided on the upper part of the lower mold pressure ring (10). The pressure ring insert (11) is sleeved on the upper part of the punch (12). A fixed plate (9) is symmetrically provided on the top of the lower mold pressure ring (10), and a rotating block (5) is rotatably provided on the fixed plate (9). A balancing block (4) is symmetrically provided on the top of the lower mold base (6), and an elastic member ( 1), a stripping plate (3) is arranged between the lower part of the elastic member (1), a balancing block (4) is in contact with the stripping plate (3), a square hole is opened in the middle of the stripping plate (3), a stretching pin (13) is symmetrically arranged at the bottom of the upper die seat (2), the stretching pin (13) is located in the square hole in the middle of the stripping plate (3), and an inner stripping pin (14) is connected to the center of the bottom of the upper die seat (2) through the elastic member (1), and the inner stripping pin (14) is located between the two stretching pins (13).

2. The stretching and returning top structure on a continuous die according to claim 1, characterized in that: The rotating block (5) is rotatably mounted on the fixed plate (9) via a rotating shaft.

3. The stretching and returning top structure on a continuous die according to claim 1, characterized in that: The rotating block (5) is cut in one go by wire cutting.

4. The stretching and returning top structure on a continuous die according to claim 1, characterized in that: The elastic member (1) is a compression spring.

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