A high-precision synchronous outward-turning hole inclined wedge die and a blanking method

Abstract

The present invention discloses a high-precision synchronous outwards-turning hole inclined wedge die, belonging to the technical field of dies. It includes an upper die base, a lower die base, a first reset block and a second reset block. A first sliding groove is arranged on the upper die base, and a positioning block is arranged on the lower die base. A first connecting block is arranged on one side of the positioning block. One end of the first reset block is connected to the first connecting block, and the opposite end is slidably connected in the first sliding groove. A second connecting block is arranged on the other side of the positioning block, and a second sliding groove is arranged on the second connecting block. One end of the second reset block is connected to the upper die base, and the opposite end is slidably connected in the second sliding groove. A blank holder is fixedly connected to the upper die base, and a punching head is arranged at the bottom of the blank holder. By arranging the first reset block and the second reset block on both sides of the positioning block, the present invention avoids the problems of sticking material and burrs during the hole turning process.

Description

Technical Field

[0001] The present invention belongs to the technical field of molds, and particularly relates to a high-precision synchronous outward turning hole inclined wedge type mold and a blanking method. Background Art

[0002] With the continuous intensification of competition in the Chinese automobile market, each automobile manufacturer is striving to minimize production costs and maximize product profits. Especially in the field of automobile stamping parts, the requirements for the production of automobile parts are very strict. Particularly in high-end automobile accessories, the requirements for hole flanging are very strict because for parts with hole flanging in automobile accessories, their functions are either to install bearings or to lock fasteners. Therefore, it is very important to control product cracking, burrs, and wall thickness during the production of such parts.

[0003] Currently, in the actual production process of hole flanging molds, problems such as sticking materials at the hole flanging due to large punching pressure often occur. Even during demolding, burrs are generated due to friction between the upper and lower molds during demolding. If we want to further improve the production efficiency of hole flanging molds, we need to redesign the forming process and the corresponding mold structure of the molds, which greatly reduces the production efficiency of hole flanging molds and affects the production quality of hole flanging parts produced by hole flanging molds. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-precision synchronous outward turning hole inclined wedge type mold to solve the problems of sticking materials and burrs that occur when the existing hole flanging molds are used for hole flanging parts, which affect the production efficiency and production quality of hole flanging parts.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme: A high-precision synchronous outward turning hole inclined wedge type mold includes an upper die base, a lower die base, a first reset block, and a second reset block. A first sliding groove is provided on the upper die base, a positioning block is provided on the lower die base, a metal part is located on the positioning block, a first connecting block is provided on one side of the positioning block, one end of the first reset block is connected to the first connecting block, and the opposite end is slidably connected in the first sliding groove. A second connecting block is provided on the other side of the positioning block, a second sliding groove is provided on the second connecting block, one end of the second reset block is connected to the upper die base, and the opposite end is slidably connected in the second sliding groove. A pressure plate is fixedly connected to the upper die base, and a punching head is provided at the bottom of the pressure plate.

[0006] As a further description of the above technical solution:

[0007] The second sliding groove is inclinedly arranged on the second connecting block, a guiding port is provided on the second sliding groove, and the guiding port faces the pressure plate.

[0008] As a further description of the above technical solution:

[0009] The first reset block and the second reset block are in a C-shaped configuration.

[0010] As a further description of the above technical solution:

[0011] A pilot pin is provided on the upper die base, a pilot groove is provided on the lower die base, and the pilot pin is connected in the pilot groove.

[0012] As a further description of the above technical solution:

[0013] The first reset block is elastically connected to the first connection block, and the second reset block is elastically connected to the upper die base.

[0014] As a further description of the above technical solution:

[0015] The upper die base and the blank holder are connected by connecting columns.

[0016] As a further description of the above technical solution:

[0017] The lower die base is in a trapezoidal shape that is narrower at the top and wider at the bottom.

[0018] On the other hand, the present invention also provides a high-precision synchronous outward-turning hole inclined wedge type die stripping method, which specifically includes the following steps: The upper die base and the blank holder move downward, the upper die base and the lower die base are completely closed, and the blank holder punches and forms the metal part. During the stamping process, the first reset block and the second reset block move downward along the first sliding groove and the second sliding groove. When the forming is completed, the first reset block and the second reset block automatically move along the first sliding groove and the second sliding groove and return to their original positions. During the reset process, the first reset block applies an upward force to the upper die base. Synchronously, the second reset block applies an upward force to the blank holder. The first reset block and the second reset block are symmetrically arranged on both sides of the positioning block, so that the upper die base and the blank holder move upward synchronously until the upper die base and the lower die base are in a completely separated state, completing the stripping of the metal part.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] 1. In the present invention, by providing a first reset block and a second reset block on both sides of the positioning block, the first reset block and the second reset block are symmetrically arranged on both sides of the positioning block. The first reset block elastically abuts against the upper die base, and the second reset block elastically abuts against the blank holder. This avoids excessive punching force and causes sticking of materials inside the flanging hole. When the punching is completed, the first reset block ejects the upper die base, and the second reset block synchronously ejects the blank holder, enabling the blank holder to be demolded along the direction of the punching head, and avoiding burrs caused by mutual friction between the upper die base and the lower die base during demolding.

[0021] 2. In the present invention, by setting the lower die base in a trapezoidal shape with a narrower upper part and a wider lower part, the overall stability of the flanging die is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0023] Figure 1 FIG. 1 is a perspective view of a high-precision synchronous external flanging inclined wedge die.

[0024] Figure 2 FIG. 2 is an exploded view of a high-precision synchronous external flanging inclined wedge die. Figure 1 .

[0025] Figure 3 FIG. 3 is an exploded view of a high-precision synchronous external flanging inclined wedge die. Figure 2 .

[0026] LEGEND DESCRIPTION:

[0027] 1 - upper die base; 2 - lower die base; 3 - first reset block; 4 - second reset block; 5 - first sliding groove; 6 - positioning block; 7 - first connecting block; 8 - second connecting block; 9 - second sliding groove; 10 - blank holder; 11 - guiding port; 12 - pilot pin; 13 - pilot groove; 14 - connecting column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0030] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention.

[0031] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it will not be necessary to further define and explain it in subsequent figures.

[0032] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "inner", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please refer to Figures 1-3, the present invention provides a technical solution: a high-precision synchronous outward-turning hole inclined wedge die, including an upper die base 1, a lower die base 2, a first reset block 3 and a second reset block 4. A first sliding groove 5 is provided on the upper die base 1, and a positioning block 6 is provided on the lower die base 2. A metal part is located on the positioning block 6. A first connecting block 7 is provided on one side of the positioning block 6. One end of the first reset block 3 is connected to the first connecting block 7, and the opposite end is slidably connected in the first sliding groove 5. A second connecting block 8 is provided on the other side of the positioning block 6. A second sliding groove 9 is provided on the second connecting block 8. One end of the second reset block 4 is connected to the upper die base 1, and the opposite end is slidably connected in the second sliding groove 9. A pressure plate 10 is fixedly connected to the upper die base 1, and a punching head is provided at the bottom of the pressure plate 10. By providing a first reset block and a second reset block on both sides of the positioning block, the first reset block and the second reset block are symmetrically arranged on both sides of the positioning block. When the upper die base and the pressure plate move downward, the upper die base and the lower die base are completely closed, and the pressure plate punches and forms the metal part. During the stamping process, the first reset block elastically abuts against the upper die base, and the second reset block elastically abuts against the pressure plate. The first reset block and the second reset block will move downward along the first sliding groove and the second sliding groove, avoiding excessive punching force and causing sticking of materials inside the turned hole. When the punching is completed, the first reset block and the second reset block will automatically move along the first sliding groove and the second sliding groove and return to their original positions. During the reset process, the first reset block ejects the upper die base, and the second reset block synchronously ejects the pressure plate, causing the upper die base and the pressure plate to move upward synchronously, enabling the pressure plate to be demolded along the direction of the punching head until the upper die base and the lower die base are in a completely separated state, completing the demolding of the metal part and avoiding burrs caused by mutual friction between the turned hole and the punching head when the upper die base and the lower die base are demolded.

[0035] The second sliding groove 9 is inclinedly arranged on the second connecting block 8, and a guiding port 11 is provided on the second sliding groove 9, and the guiding port 11 faces the pressure plate 10. This enables the second reset block to automatically reset along the second sliding groove after punching and demolding, and ejects the pressure plate through the guiding port.

[0036] The first reset block 3 and the second reset block 4 are in a C-shaped configuration.

[0037] A guiding post 12 is provided on the upper die base 1, and a guiding groove 13 is provided on the lower die base 2. The guiding post 12 is connected in the guiding groove 13. This ensures that the upper die base and the lower die base can be accurately closed.

[0038] The first reset block 3 is elastically connected to the first connection block 7, and the second reset block 4 is elastically connected to the upper die base 1. When the upper die base and the lower die base are closed, the first reset block and the second reset block can move along the first sliding groove and the second sliding groove. When the upper die base and the lower die base are demolded, they can automatically reset, which buffers the punching force of the pressure plate on the positioning block to a certain extent and avoids sticking of materials in the flanging hole.

[0039] The upper die base 1 and the pressure plate 10 are connected by a connecting column 14.

[0040] The lower die base 2 is trapezoidal in shape with a narrower upper part and a wider lower part, which improves the overall stability of the die.

[0041] On the other hand, the present invention also provides a high-precision synchronous outer flanging hole inclined wedge type die stripping method, which specifically includes the following steps: the upper die base 1 and the pressure plate 10 move downward, the upper die base 1 and the lower die base 2 are completely closed, and punching and forming of metal parts are realized. During the stamping process, the first reset block 3 and the second reset block 4 will move downward along the first sliding groove 5 and the second sliding groove 9. When the stamping is completed, the first reset block 3 and the second reset block 4 will automatically move along the first sliding groove 5 and the second sliding groove 9 and return to their original positions. During the reset process, the first reset block 3 exerts an upward force on the upper die base 1. Synchronously, the second reset block 4 exerts an upward force on the pressure plate 10. The first reset block 3 and the second reset block 4 are symmetrically arranged on both sides of the positioning block 6, so that the upper die base 1 and the pressure plate 10 move upward synchronously until the upper die base 1 and the lower die base 2 are in a completely separated state, and the stripping of the metal parts is completed.

[0042] Working principle: By arranging the first reset block and the second reset block on both sides of the positioning block, the first reset block and the second reset block are symmetrically arranged on both sides of the positioning block. The upper die base and the pressure plate move downward, and the upper die base and the lower die base are completely closed. The pressure plate realizes punching and forming of metal parts. During the stamping process, the first reset block elastically abuts against the upper die base, and the second reset block elastically abuts against the pressure plate. The first reset block and the second reset block will move downward along the first sliding groove and the second sliding groove, avoiding excessive punching force and causing sticking of materials in the flanging hole. When the punching is completed, the first reset block and the second reset block will automatically move along the first sliding groove and the second sliding groove and return to their original positions. During the reset process, the first reset block ejects the upper die base, and the second reset block synchronously ejects the pressure plate, so that the upper die base and the pressure plate move upward synchronously, enabling the pressure plate to be stripped along the direction of the punching head until the upper die base and the lower die base are in a completely separated state, and the stripping of the metal parts is completed, avoiding burrs caused by mutual friction between the flanging hole and the punching head when the upper die base and the lower die base are demolded.

[0043] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes should be covered by the protection scope of the present invention.

Claims

1. A high-precision synchronous out-turning hole inclined wedge die, comprising an upper die base (1), a lower die base (2), a first reset block (3) and a second reset block (4). A first sliding groove (5) is arranged on the upper die base (1), and a positioning block (6) is arranged on the lower die base (2). A metal part is located on the positioning block (6). A first connecting block (7) is arranged on one side of the positioning block (6). One end of the first reset block (3) is connected to the first connecting block (7), and the opposite end is slidably connected in the first sliding groove (5). A second connecting block (8) is arranged on the other side of the positioning block (6). A second sliding groove (9) is arranged on the second connecting block (8). One end of the second reset block (4) is connected to the upper die base (1), and the opposite end is slidably connected in the second sliding groove (9). A blank holder (10) is fixedly connected to the upper die base (1), and a punching head is arranged at the bottom of the blank holder (10). The first reset block (3) is elastically connected to the first connecting block (7), and the second reset block (4) is elastically connected to the upper die base (1). The second sliding groove (9) is inclinedly arranged on the second connecting block (8), and a guiding port (11) is arranged on the second sliding groove (9), and the guiding port (11) faces the blank holder (10).

2. A high-precision synchronous out-turning hole inclined wedge die according to claim 1, characterized in that, the first reset block (3) and the second reset block (4) are in a C shape.

3. A high-precision synchronous out-turning hole inclined wedge die according to claim 1, characterized in that, a guiding post (12) is arranged on the upper die base (1), and a guiding groove (13) is arranged on the lower die base (2), and the guiding post (12) is connected in the guiding groove (13).

4. A high-precision synchronous out-turning hole inclined wedge die according to claim 1, characterized in that, the upper die base (1) and the blank holder (10) are connected by a connecting column (14).

5. A high-precision synchronous out-turning hole inclined wedge die according to claim 1, characterized in that, the lower die base (2) is in a trapezoidal shape with a narrow upper part and a wide lower part.

6. A blank stripping method for a high-precision synchronous out-turning hole inclined wedge die, characterized in that, it includes the following steps: The upper die holder (1) and the blank holder (10) move downward, and the upper die holder (1) and the lower die holder (2) are completely closed to form a stamping hole in the metal part. During the stamping process, the first reset block (3) and the second reset block (4) will move downward along the first sliding groove (5) and the second sliding groove (9). When the stamping hole is formed, the first reset block (3) and the second reset block (4) will automatically move along the first sliding groove (5) and the second sliding groove (9) to return to their original positions. During the reset process, the first reset block (3) exerts an upward force on the upper die holder (1). Synchronously, the second reset block (4) exerts an upward force on the blank holder (10). The first reset block (3) and the second reset block (4) are symmetrically arranged on both sides of the positioning block (6), so that the upper die holder (1) and the blank holder (10) move upward synchronously until the upper die holder (1) and the lower die holder (2) are in a completely separated state, completing the stripping of the metal part.

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