Cold extrusion die

Abstract

The utility model relates to the technical field of cold extrusion dies, and particularly discloses a cold extrusion die which comprises an upper die and a lower die which are oppositely arranged, a guide assembly is arranged between the upper die and the lower die, and the upper die comprises an upper die plate; a through hole is formed in the middle of the upper template; an upper die head is placed in the through hole; a demolding assembly matched with the upper mold head is arranged on the bottom surface of the upper mold plate; a plurality of connecting grooves are formed in the peripheral wall of the upper template; the lower die comprises a lower die plate; a base plate assembly is placed in the middle of the lower template; pressing plates are arranged on the top faces of the base plate assemblies. The pressing plate is arranged on the lower die plate through a fixing piece. A lower die head is placed in the middle of the base plate assembly; a limiting assembly is arranged between the upper die and the lower die. Compared with the prior art, the upper die plate is fixed through the bolt and the connecting groove, the lower die head is fixed to the lower die plate through the base plate assembly and the pressing plate, direct fixing through the bolt is avoided, assembling is convenient, and the cracking probability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cold extrusion dies, and specifically discloses a cold extrusion die. Background Art

[0002] Cold extrusion dies are widely used in various fields, including aviation, aerospace, automotive, electronics, etc. Specifically, in the aviation field, cold extrusion dies can be used to produce high-strength components such as aircraft screws and bolts; in automotive manufacturing, they can be used to produce components such as vehicle bodies, chassis, and engines; in the field of electronic appliances, they can be used to produce components such as mobile phone casings and radiators. Cold extrusion dies can also be used in the field of mechanical manufacturing to produce components such as gears, shafts, and bolts.

[0003] Cold extrusion dies are an important part of precision plastic volume forming technology. Using the principle of metal plastic deformation, a strong pressure is applied to the metal in the extrusion die cavity at room temperature, causing it to extrude from the die hole or the gap between the convex and concave dies, thereby obtaining the required parts through a non-cutting processing method.

[0004] In traditional cold extrusion dies, both the upper die head and the lower die head are directly connected to the upper template and the lower template using bolts, which is inconvenient for assembly and prone to cracking. Moreover, the upper die head is not completely demolded and is prone to material carrying. Summary of the Utility Model

[0005] Aiming at the above deficiencies of the prior art, the utility model provides a cold extrusion die to solve the problems that both the upper die head and the lower die head are directly connected to the upper template and the lower template using bolts, which is inconvenient for assembly and prone to cracking.

[0006] To achieve the above object, the technical solution of the utility model is as follows:

[0007] A cold extrusion die includes an upper die and a lower die arranged oppositely. A guiding component is arranged between the upper die and the lower die. The upper die includes an upper template. A through hole is arranged in the middle of the upper template. An upper die head is placed in the through hole. A demolding component is arranged on the bottom surface of the upper template in cooperation with the upper die head. A plurality of connecting grooves are arranged on the peripheral wall of the upper template. The lower die includes a lower template. A backing plate component is placed in the middle of the lower template. A pressing plate is arranged on the top surface of the backing plate component. The pressing plate is arranged on the lower template through a fixing member. A lower die head is placed in the middle of the backing plate component. A limiting component is arranged between the upper die and the lower die. During use, the upper template is fixed using bolts and the connecting grooves, and the lower die head is fixed to the lower template using the backing plate component and the pressing plate, avoiding direct fixing using bolts, being more convenient for assembly, and reducing the probability of cracking.

[0008] Preferably, the guiding component includes a sleeve fixedly arranged on the bottom surface of the upper template; a round rod is slidably arranged in the sleeve; one end of the round rod away from the sleeve is fixedly arranged on the lower template; a first spring is sleeved outside the round rod; the first spring is arranged between the lower template and the sleeve. By using the sleeve and the round rod, the precision of the cold extrusion die is ensured. The setting of the first spring can reduce vibration.

[0009] Preferably, the limiting component includes an upper limiting column fixedly arranged on the bottom surface of the upper template; a lower limiting column is coaxially arranged below the upper limiting column; the lower limiting column is fixedly arranged on the lower template; a limiting block is placed on the top surface of the lower limiting column; a groove is arranged on the bottom surface of the limiting block to cooperate with the lower limiting column. The setting of the limiting block can adjust the distance between the upper die and the lower die according to different requirements to meet the extrusion needs of different products.

[0010] Preferably, the upper die head is integrally arranged in a stepped shaft shape; the demoulding component includes connecting columns arranged oppositely; the connecting columns are arranged on the bottom surface of the upper template through bolts I; a demoulding plate is arranged on the connecting columns; the demoulding plate is slidably arranged on the upper die head; a second spring is sleeved on the connecting columns; the second spring is arranged between the upper template and the demoulding plate. When the upper die is lifted, the demoulding plate can be pressed down under the action of the elastic force of the second spring to eject the extruded product.

[0011] Preferably, a working belt is arranged on the side wall of the lower part of the upper die head; the included angle α between the plane where the working belt is located and the bottom surface of the upper die head is 90.2°. It reduces the deformation of the product caused by excessive friction during forming.

[0012] Preferably, the backing plate component includes a bottom backing plate; a groove is arranged in the middle of the lower template; the bottom backing plate is placed in the groove; a middle backing plate is placed on the bottom backing plate; a circular ring boss is arranged on the bottom surface of the middle backing plate to cooperate with the bottom backing plate; an upper backing plate is coaxially placed on the middle backing plate; a blind hole is arranged in the middle of the upper backing plate; the lower die head is placed in the blind hole; a groove is arranged on the pressing plate to cooperate with the upper backing plate. The setting of the backing plate component can avoid directly fixing the lower die head with bolts, reducing the probability of cracking.

[0013] Preferably, the fixing part includes a fixing column; the fixing column is arranged on the bottom surface of the pressing plate through bolts II; a circular ring gasket is arranged on the lower template to cooperate with the fixing column; the circular ring gasket is arranged on the lower template through screws. It ensures the stability of the pressing plate setting, the stability of the backing plate component, and further ensures the stability of the lower die head setting.

[0014] The beneficial effects of the present utility model are as follows: During use, the upper template is fixed by using bolts and connecting grooves, and the lower die head is fixed on the lower template by using the backing plate component and the pressing plate, avoiding direct fixing with bolts, being more convenient for assembly, and reducing the probability of cracking. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic cross-sectional structural diagram of the present invention;

[0018] Figure 3 is an exploded structural diagram of the present invention;

[0019] Figure 4 is a schematic structural diagram of the upper die head of the present invention.

[0020] Explanation of reference numerals:

[0021] 1 - upper template, 2 - upper die head, 3 - lower template, 4 - pressure plate, 5 - fixing member, 6 - lower die head, 7 - sleeve, 8 - round rod, 9 - first spring, 10 - upper limit post, 11 - lower limit post, 12 - limit block, 13 - connecting column, 14 - first bolt, 15 - stripping template, 16 - second spring, 17 - bottom backing plate, 18 - middle backing plate, 19 - upper backing plate;

[0022] 101 - through hole, 102 - connecting groove; 201 - working belt; 501 - fixing column, 502 - second bolt, 503 - ring gasket;

[0023] Figure 4 In it, α is the angle between the plane where the working belt is located and the bottom surface of the upper die head. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, 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 shall fall within the scope of protection of the present invention.

[0025] Such as Figures 1-3As shown in the figure, a cold extrusion die includes an upper die and a lower die arranged oppositely. A guiding component is arranged between the upper die and the lower die. The upper die includes an upper template 1. A through hole 101 is arranged in the middle of the upper template 1. An upper die head 2 is placed in the through hole 101. A demoulding component is arranged on the bottom surface of the upper template 1 to cooperate with the upper die head 2. A plurality of connecting grooves 102 are arranged on the peripheral wall of the upper template 1. The lower die includes a lower template 3. A backing plate component is placed in the middle of the lower template 3. A pressing plate 4 is arranged on the top surface of the backing plate component. The pressing plate 4 is arranged on the lower template 3 through a fixing member 5. A lower die head 6 is placed in the middle of the backing plate component. A limiting component is arranged between the upper die and the lower die. During use, the upper template 1 is fixed by bolts and the connecting grooves 102. The lower die head 6 is fixed on the lower template 3 by the backing plate component and the pressing plate 4, avoiding direct fixing by bolts, which is more convenient for assembly and reduces the probability of cracking. The fixing member 5 includes a fixing column 501. The fixing column 501 is arranged on the bottom surface of the pressing plate 4 through a second bolt 502. A circular washer 503 is arranged on the lower template 3 to cooperate with the fixing column 501. The circular washer 503 is arranged on the lower template 3 through screws. It ensures the stability of the pressing plate 4, the stability of the backing plate component, and further ensures the stability of the lower die head 6.

[0026] In the above setting, the guiding component includes a sleeve 7 fixedly arranged on the bottom surface of the upper template 1. A round rod 8 is slidably arranged in the sleeve 7. One end of the round rod 8 away from the sleeve 7 is fixedly arranged on the lower template 3. A first spring 9 is sleeved outside the round rod 8. The first spring 9 is arranged between the lower template 3 and the sleeve 7. By using the sleeve 7 and the round rod 8, the precision of the cold extrusion die is ensured. The setting of the first spring 9 can reduce vibration. The limiting component includes an upper limiting column 10 fixedly arranged on the bottom surface of the upper template 1. A lower limiting column 11 is coaxially arranged below the upper limiting column 10. The lower limiting column 11 is fixedly arranged on the lower template 3. A limiting block 12 is placed on the top surface of the lower limiting column 11. A groove is arranged on the bottom surface of the limiting block 12 to cooperate with the lower limiting column 11. The setting of the limiting block 12 can adjust the distance between the upper die and the lower die according to different requirements to meet the extrusion needs of different products.

[0027] Among them, the upper die head 2 is integrally arranged in the shape of a stepped shaft; the demolding assembly includes connecting columns 13 arranged oppositely; the connecting columns 13 are arranged on the bottom surface of the upper template 1 through bolts 14; a demolding plate 15 is arranged on the connecting columns 13; the demolding plate 15 is slidably arranged on the upper die head 2; a second spring 16 is sleeved on the connecting columns 13; the second spring 16 is arranged between the upper template 1 and the demolding plate 15. When the upper die is lifted, the demolding plate 15 can be pressed down under the elastic force of the second spring 16 to eject the extruded product. The backing plate assembly includes a bottom backing plate 17; a groove is arranged in the middle of the lower template 3; the bottom backing plate 17 is placed in the groove; a middle backing plate 18 is placed on the bottom backing plate 17; a circular ring boss is arranged on the bottom surface of the middle backing plate 18, and the circular ring boss is arranged in cooperation with the bottom backing plate 17; an upper backing plate 19 is coaxially placed on the middle backing plate 18; a blind hole is arranged in the middle of the upper backing plate 19, and the lower die head 6 is placed in the blind hole; the pressing plate 4 is provided with a groove in cooperation with the upper backing plate 19. The setting of the backing plate assembly can avoid directly fixing the lower die head 6 by bolts and reduce the probability of cracking.

[0028] As Figure 4 shown, a working belt 201 is arranged on the lower side wall of the upper die head 2; the included angle α between the plane where the working belt 201 is located and the bottom surface of the upper die head 2 is 90.2°, which reduces the deformation of the product caused by excessive friction during molding.

[0029] Although the present utility model has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and these modifications or substitutions should all be within the scope of the present utility model. / Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present utility model, and all should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A cold extrusion die, comprising an upper die and a lower die arranged opposite to each other, a guide assembly being arranged between the upper die and the lower die, characterized in that: The upper mold comprises an upper mold plate (1); a through hole (101) is provided in the middle of the upper mold plate (1); an upper mold head (2) is placed in the through hole (101); a demoulding assembly is provided on the bottom surface of the upper mold plate (1) in cooperation with the upper mold head (2); a plurality of connecting grooves (102) are provided on the peripheral wall of the upper mold plate (1); the lower mold comprises a lower mold plate (3); a pad assembly is placed in the middle of the lower mold plate (3); a pressing plate (4) is provided on the top surface of the pad assembly; the pressing plate (4) is arranged on the lower mold plate (3) through a fixing member (5); a lower mold head (6) is placed in the middle of the pad assembly; and a limit position assembly is provided between the upper mold plate and the lower mold.

2. The cold extrusion die according to claim 1, characterized in that: The guide assembly comprises a sleeve (7) fixedly arranged on the bottom surface of the upper template (1); a round rod (8) is slidably arranged in the sleeve (7); an end of the round rod (8) away from the sleeve (7) is fixedly arranged on the lower template (3); a spring (9) is arranged on the outer sleeve of the round rod (8); and the spring (9) is arranged between the lower template (3) and the sleeve (7).

3. The cold extrusion die according to claim 1, characterized in that: The limit assembly comprises an upper limit column (10) fixedly arranged on the bottom surface of the upper template (1); a lower limit column (11) is coaxially arranged below the upper limit column (10); the lower limit column (11) is fixedly arranged on the lower template (3); a limit block (12) is placed on the top surface of the lower limit column (11); and a groove is arranged on the bottom surface of the limit block (12) to match the lower limit column (11).

4. The cold extrusion die according to claim 1, characterized in that: The upper die head (2) is arranged in a stepped shaft shape as a whole; the demoulding assembly comprises connecting columns (13) arranged opposite to each other; the connecting column (13) is arranged on the bottom surface of the upper die plate (1) through a bolt 1 (14); a demoulding plate (15) is arranged on the connecting column (13); the demoulding plate (15) is slidably arranged on the upper die head (2); a spring 2 (16) is sleeved on the connecting column (13); and the spring 2 (16) is arranged between the upper die plate (1) and the demoulding plate (15).

5. The cold extrusion die according to claim 1, characterized in that: A working belt (201) is provided on the lower side wall of the upper die head (2); an angle α between the plane where the working belt (201) is located and the bottom surface of the upper die head (2) is 90.2°.

6. The cold extrusion die according to claim 5, characterized in that: The pad assembly comprises a bottom pad (17); a groove is provided in the middle of the lower template (3); the bottom pad (17) is placed in the groove; a middle pad (18) is placed on the bottom pad (17); a circular boss is provided on the bottom surface of the middle pad (18), and the circular boss is arranged in coordination with the bottom pad (17); an upper pad (19) is coaxially placed on the middle pad (18); a blind hole is provided in the middle of the upper pad (19), and a lower die head (6) is placed in the blind hole; and a groove is provided on the pressure plate (4) in coordination with the upper pad (19).

7. The cold extrusion die according to claim 6, characterized in that: The fixing member (5) comprises a fixing column (501); the fixing column (501) is arranged on the bottom surface of the pressing plate (4) by means of a second bolt (502); a circular ring washer (503) is arranged on the lower template (3) to cooperate with the fixing column (501); and the circular ring washer (503) is arranged on the lower template (3) by means of screws.

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