Crease-resistant exhaust stamping die

Abstract

An anti-wrinkling exhaust stamping die comprises a male die and a female die, the male die is provided with an inner concave cavity, the inner concave cavity is concavely arranged relative to the male die, the inner concave cavity is provided with a first exhaust hole, the female die is provided with an annular cavity, the annular cavity is concavely arranged relative to other positions of the female die, and the annular cavity is provided with a second exhaust hole. According to the stamping die, gas extruded in the die during stamping is exhausted in time through the exhaust holes, stamping is faster and more efficient, wrinkles or other defects caused by local irregular deformation due to gas accumulation are avoided, the stamping efficiency and the stamping quality can be improved, the average stamping cost is reduced, and good economic benefits are obtained.

Description

Technical Field

[0001] The utility model belongs to the field of material forming, and in particular relates to an anti-wrinkle exhaust stamping die. Background Art

[0002] Thinner metal parts are more likely to have defects during stamping. For example, when designing the mold for stamping cans, the exhaust function must be considered. Existing cars are increasingly paying attention to exterior decoration. The decorative panels or storage racks inside the car are not beautiful enough if injection molding is used. Although electroplating technology is more beautiful, it is easy to wear. There is also a process that integrates metal materials and injection molding materials. In places that are prone to wear, a thin metal structure can be set to cover the surface, which is not only beautiful but also appears to be high-end.

[0003] like Figure 1 As shown in the figure, the part is a decorative thin metal sheet at the rear of the car armrest box, which needs to be stamped. However, due to the thin metal, a small number of stamped parts will have some creases or wrinkles at the bottom after stamping, which look like cracks after flattening, so the mold needs to be improved. Utility Model Content

[0004] In view of the above-mentioned prior art, the purpose of the utility model is to provide a more practical wrinkle-proof exhaust stamping die.

[0005] The technical solution of the utility model is achieved as follows: an anti-wrinkle exhaust stamping die comprises a punch and a die, the punch has an inner concave cavity, the inner concave cavity is concavely arranged relative to the punch, the inner concave cavity is provided with a first exhaust hole, the die has an annular cavity, the annular cavity is concavely arranged relative to other positions of the die, and the annular cavity is provided with a second exhaust hole.

[0006] The beneficial effect of such design is that the gas squeezed inside the die during stamping can be discharged in time by setting the exhaust holes, making the stamping faster and more efficient, and will not cause wrinkles or other defects due to local irregular deformation caused by gas accumulation, thereby improving both the stamping efficiency and the stamping quality, reducing the average cost of stamping, meeting the requirements of forming 0.5 mm thin sheet metal, and obtaining better economic benefits.

[0007] Furthermore, the first exhaust hole is located on the side wall of the inner cavity, which can avoid the uneven bottom of the formed decorative thin metal sheet and the appearance of stamping marks. The side is subjected to less force during stamping and basically does not affect the forming, and no stamping marks will appear to affect the appearance.

[0008] Furthermore, the punch adopts a split design including a first punch and a second punch, and a first exhaust hole is arranged at a gap position between the first punch and the second punch. Such a design of the first exhaust hole makes it easier to process, and utilizing the gap for exhaust can reduce the area of ​​the first exhaust hole, thereby having less impact on molding.

[0009] Furthermore, the second exhaust hole is located on the outer wall of the annular cavity. This design can exhaust the air generated by the extrusion of the annular cavity, avoid affecting the stamping forming, and meet the requirements of sheet metal forming.

[0010] Furthermore, the die adopts a split design including at least a first die and a second die, and a second exhaust hole is arranged at the gap position between the first die and the second die. Such a design of the second exhaust hole makes it easier to process, and utilizing the gap for exhaust can reduce the area of ​​the second exhaust hole, thereby having less impact on molding.

[0011] Furthermore, the concave mold has a left annular cavity and a right annular cavity, the left annular cavity and the right annular cavity are separated by a rib portion, the left annular cavity is provided with two left exhaust holes, and the right annular cavity is provided with two right exhaust holes. This design conforms to the shape of the product. The design of two exhaust holes can balance the forces on the left and right sides, thereby avoiding the impact of unbalanced forces on the stamping process.

[0012] Furthermore, the rib plate portion is provided with a communicating exhaust hole so that the left annular cavity and the right annular cavity can be communicated with each other, so that when one air hole is accidentally blocked, the other air hole can be used for exhaust, thereby improving the stability of the mold.

[0013] Furthermore, the die includes a first die, a second die and a third die. The second die and the third die form the central protruding parts of the left annular cavity and the right annular cavity, and the first die forms other parts except the central protruding part. The first die has a third inlay cavity and a second inlay cavity to respectively install the second die and the third die. The inlay structure can meet both the exhaust requirements and the precision requirements.

[0014] Furthermore, the male mold has a left inner cavity and a right inner cavity. The left inner cavity is relatively independently arranged relative to the right inner cavity. The left inner cavity is provided with a left exhaust hole, and the right inner cavity is provided with a right exhaust hole. In this way, the design is carried out according to product requirements to meet product molding requirements and balance the forces on both sides.

[0015] Furthermore, the first convex mold forms half of the left inner cavity and the right inner cavity, the second convex mold forms the other half of the left inner cavity and the right inner cavity, and the second convex mold is provided with a first inlay cavity to install the first convex mold. This design adopts an inlay structure to meet both the exhaust requirements and the precision requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an existing decorative thin metal sheet;

[0017] Figure 2 Schematic diagram of processing blanks for existing decorative thin metal sheets;

[0018] Figure 3 This is a three-dimensional schematic diagram of the female die of the wrinkle-proof exhaust stamping die of the utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the punch die of the wrinkle-proof exhaust stamping die of the utility model;

[0020] Figure 5 This is a schematic diagram of a split punch of the utility model for wrinkle-proof exhaust stamping die;

[0021] Figure 6 It is a schematic diagram of the split concave die of the wrinkle-proof exhaust stamping die of the utility model. DETAILED DESCRIPTION

[0022] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The drawings are not necessarily drawn to scale, and certain features may be exaggerated or reduced to show the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, the part is a decorative thin metal sheet at the rear of the car armrest box, which can be processed using copper or aluminum. The part is provided with a first annular groove 21 and a second annular groove 22. A first boss 23 is provided in the first annular groove 21, and a second boss 24 is provided in the second annular groove 22. A downward flange structure 25 is provided on the outer periphery of the part.

[0024] Since the flange structure 25 is difficult to process and inconvenient to blank, the flange structure 25 is not processed first, and a mold is first used to manufacture the flange structure 25. Figure 2 The part shown is then subjected to the flanging operation.

[0025] like Figure 3 and Figure 4 As shown, the wrinkle-proof exhaust stamping die comprises a male die 1 and a female die 2, the male die 1 has an inner concave cavity 3, the inner concave cavity 3 is concave relative to the male die 1, and the inner concave cavity 3 is provided with a first exhaust hole 4, the female die 2 has an annular cavity 5, the annular cavity 5 is concave relative to other positions of the female die 2, and the annular cavity 5 is provided with a second exhaust hole 6. The annular cavity 5 can form a first annular groove 21 and a second annular groove 22, and the inner concave cavity 3 forms a first boss 23 and a second boss 24.

[0026] like Figure 4 As shown, the first exhaust hole 4 is located on the side wall 7 of the inner cavity 3 .

[0027] like Figure 5As shown, the punch 1 is designed to be split and includes a first punch 11 and a second punch 12 , and a first exhaust hole 4 is arranged at a gap between the first punch 11 and the second punch 12 .

[0028] like Figure 3 As shown, the second exhaust hole 6 is located on the outer side wall 8 of the annular cavity 5 .

[0029] like Figure 6 As shown, the die 2 adopts a split design and includes at least a first die 2 and a second die 2 , and a second exhaust hole 6 is arranged at a gap position between the first die 2 and the second die 2 .

[0030] like Figure 3 As shown, the die 2 has a left annular cavity 51 and a right annular cavity 52 . The left annular cavity 51 and the right annular cavity 52 are separated by a rib portion 53 . The left annular cavity 51 is provided with two left exhaust holes 61 , and the right annular cavity 52 is provided with two right exhaust holes 62 .

[0031] like Figure 3 As shown, the rib portion 53 is provided with a communicating exhaust hole 54 so that the left annular cavity 51 and the right annular cavity 52 can communicate with each other.

[0032] like Figure 6 As shown, the die 2 includes a first die 29, a second die 28 and a third die 27. The second die 28 and the third die 27 mold the central protruding parts of the left annular cavity 51 and the right annular cavity 52, namely the first protruding part 55 and the second protruding part 56. The first die 29 molds the other parts except the central protruding part, namely the first protruding part 55 and the second protruding part 56. The first die 29 has a third inlay cavity 39 and a second inlay cavity 38 for installing the second die 28 and the third die 27 respectively.

[0033] like Figure 4 As shown, the male mold 1 has a left inner cavity 31 and a right inner cavity 32. The left inner cavity 31 is independently arranged relative to the right inner cavity 32. The left inner cavity 31 is provided with a left exhaust hole 41, and the right inner cavity 32 is provided with a right exhaust hole 42.

[0034] like Figure 5 As shown, the first punch 11 forms half of the left inner cavity 31 and the right inner cavity 32 , and the second punch 12 forms the other half of the left inner cavity 31 and the right inner cavity 32 . The second punch 12 is provided with a first embedding cavity 13 for installing the first punch 11 .

[0035] Through continuous practice, it was found that the wrinkle defect was caused by the poor exhaust due to the fast molding speed of the mold. After using the technical solution of the present application, the mold processing of decorative thin metal sheets basically no longer produces similar wrinkle defects.

Claims

1. Anti-wrinkle exhaust stamping die, characterized by: The invention comprises a male mold (1) and a female mold (2), wherein the male mold (1) has an inner concave cavity (3), the inner concave cavity (3) is arranged inwardly relative to the male mold (1), and the inner concave cavity (3) is provided with a first exhaust hole (4); the female mold (2) has an annular cavity (5), the annular cavity (5) is arranged inwardly relative to other positions of the female mold (2), and the annular cavity (5) is provided with a second exhaust hole (6).

2. The wrinkle-proof and exhaust-venting stamping die according to claim 1, characterized in that: The first exhaust hole (4) is located on the side wall (7) of the inner concave cavity (3).

3. The wrinkle-proof and venting stamping die according to claim 1, characterized in that: The punch (1) is designed as a split piece and comprises a first punch (11) and a second punch (12); a first exhaust hole (4) is provided at a gap position between the first punch (11) and the second punch (12).

4. The wrinkle-proof and venting stamping die according to claim 1, characterized in that: The second exhaust hole (6) is located on the outer side wall (8) of the annular cavity (5).

5. The wrinkle-proof and venting stamping die according to claim 1, characterized in that: The die (2) is designed as a split die and comprises at least a first die (29) and a second die (28); a second exhaust hole (6) is provided at a gap between the first die (29) and the second die (28).

6. The wrinkle-proof and venting stamping die according to claim 1, characterized in that: The die (2) comprises a left annular cavity (51) and a right annular cavity (52); the left annular cavity (51) and the right annular cavity (52) are separated by a rib portion (53); the left annular cavity (51) is provided with two left exhaust holes (61); and the right annular cavity (52) is provided with two right exhaust holes (62).

7. The wrinkle-proof and venting stamping die according to claim 6, characterized in that: The rib plate portion (53) is provided with a communicating exhaust hole (54) so ​​that the left annular cavity (51) and the right annular cavity (52) can be communicated with each other.

8. The wrinkle-proof and venting stamping die according to claim 6, characterized in that: The die (2) comprises a first die (29), a second die (28) and a third die (27); the second die (28) and the third die (27) form the central protruding parts of the left annular cavity (51) and the right annular cavity (52); the first die (29) forms the other parts except the central protruding parts; the first die (29) has a third inlay cavity (39) and a second inlay cavity (38) for respectively mounting the second die (28) and the third die (27).

9. The wrinkle-proof and venting stamping die according to claim 3, characterized in that: The male mold (1) comprises a left inner concave cavity (31) and a right inner concave cavity (32); the left inner concave cavity (31) is independently arranged relative to the right inner concave cavity (32); the left inner concave cavity (31) is provided with a left exhaust hole (41), and the right inner concave cavity (32) is provided with a right exhaust hole (42).

10. The wrinkle-proof and venting stamping die according to claim 9, characterized in that: The first convex mold (11) forms the left inner concave cavity (31) and half of the right inner concave cavity (32), the second convex mold (12) forms the other half of the left inner concave cavity (31) and the right inner concave cavity (32), and the second convex mold (12) is provided with a first embedding cavity (13) for mounting the first convex mold (11).

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