Die for loose tooling forging

Abstract

The utility model discloses a die for loose tooling forging, which comprises a die body, a through forging hole is formed in the die body, a first clamping table is arranged in the forging hole, and the first clamping table is positioned at the lower end of the die body; a cushion block is arranged in the forging hole in a sliding mode and comprises a second clamping table and a supporting block, the second clamping table is located at the upper end of the supporting block, the supporting block is arranged on the first clamping table in an inserted mode, and the second clamping table is connected to the first clamping table in a lap joint mode. According to the forging die, the die body is placed below the forging hammer, the cushion block is inserted into the forging hole, then the blank is placed into the forging hole, in the blank forging process, the forging hammer can apply downward pressure to the blank and the cushion block, and the force, caused by deformation of the blank, of ascending of the die body can be overcome; therefore, the die body does not jump in the forging process, and the die body is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for tire die forging. Background Art

[0002] Die forging is a method of processing die forgings by installing a die of a certain shape on a free hammer forging or press. Die forging is a forging process developed to meet the needs of small and medium-sized batch forging production, and has the characteristics of both die forging and free forging. Usually, the blank is made by free forging, and then formed in a die, which is the die used in the forging process.

[0003] During die forging, the die is placed under the forging hammer. In order to make the lower end surface of the forging more flat and smooth, a pad is generally provided in the die. The blank is placed in the die, and the lower end surface of the blank is in contact with the pad. The forging hammer then forges the blank to deform the blank to form a workpiece. However, during the forging process, the blank will deform, and the surface in contact with the die will flow in the reverse direction due to extrusion, and there is friction between the blank and the die, which will drive the die to move. Specifically, the forging hammer hits the blank, driving the blank and the die to bounce upward, which will inevitably lead to the movement of the die. Therefore, after the die bounces up, it needs to be repositioned and moved to the bottom of the forging hammer, which takes a certain amount of time. During this period of time, the temperature of the blank will drop to a certain extent, which may cause the workpiece to crack in the subsequent forging process, affecting the quality of the workpiece. Utility Model Content

[0004] The utility model aims to provide a die for tire forging in view of the above-mentioned deficiencies in the prior art.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A die for tire die forging, comprising a die body, the die body is provided with a through forging hole, a first clamping platform is arranged in the forging hole, and the first clamping platform is located at the lower end of the die body;

[0007] A cushion block is slidably arranged in the forging hole, and the cushion block comprises a second clamping platform and a supporting block, wherein the second clamping platform is located at the upper end of the supporting block, the supporting block is inserted on the first clamping platform, and the second clamping platform is overlapped on the first clamping platform.

[0008] Preferably, the mold body and the first clamping platform are both annular structures, and the support block and the second clamping platform are both cylindrical structures.

[0009] Preferably, the inner wall of the forging hole is an inclined structure, and the upper diameter of the forging hole is larger than the lower diameter.

[0010] Preferably, the angle between the inner wall of the forging hole and the axis is 0.5° to 1°.

[0011] Preferably, the cushion block is concentrically arranged with the mold body.

[0012] Preferably, there is a clearance fit between the cushion block and the mold body.

[0013] Preferably, the distance between the cushion block and the mold body is 1.5 mm to 2 mm.

[0014] The beneficial effects of adopting the above technical solution are:

[0015] In the utility model, a first clamping platform is provided at the lower end of the mold body, a second clamping platform is provided on the cushion block, and the second clamping platform is overlapped on the first clamping platform. When forging the blank, the blank is placed in the forging hole and forged by a forging hammer. During forging, the deformation of the blank drives the mold body to bounce upward, but the impact force of the forging hammer forging downward will apply downward pressure to the cushion block, and the downward pressure is much greater than the friction between the blank and the mold body. The second clamping platform cooperates with the first clamping platform to limit the mold body, which can effectively prevent the mold body from bouncing upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a three-dimensional schematic diagram of the mold body of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of a cushion block of the present utility model.

[0020] In the figure: 1 is the die body, 2 is the forging hole, 3 is the first clamping platform, 4 is the cushion block, 5 is the second clamping platform, 6 is the supporting block, 7 is the punch, and 8 is the blank. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figures 1 to 4 As shown, a die for tire die forging comprises a die body 1 and a cushion block 4 arranged in the die body 1, wherein the die body 1 is an annular structure, a forging hole 2 penetrating from top to bottom is opened in the middle of the die body 1, a first clamping platform 3 is arranged in the forging hole 2, the first clamping platform 3 is an annular structure, a through hole is arranged in the middle of the first clamping platform 3, the diameter of the through hole is smaller than the diameter of the forging hole 2, the through hole is arranged concentrically with the forging hole 2, the first clamping platform 3 is located at the lower end of the die body 1, and the lower end surface of the first clamping platform 3 and the lower end surface of the die body 1 are located in the same plane;

[0025] The cushion block 4 is slidably set in the forging hole 2, and the cushion block 4 includes a second card platform 5 and a support block 6. The second card platform 5 and the support block 6 are both cylindrical structures. The diameter of the second card platform 5 is larger than the diameter of the support block 6, and the diameter of the second card platform 5 is larger than the diameter of the through hole on the first card platform 3. The second card platform 5 is fixedly set at the upper end of the support block 6. The second card platform 5 and the support block 6 are concentrically set. The support block 6 is inserted in the through hole of the first card platform 3. The second card platform 5 is overlapped on the first card platform 3. The thickness of the support block 6 is less than or equal to the thickness of the first card platform 3. In the utility model, the thickness of the support block 6 is equal to the thickness of the first card platform 3, so the upper end face of the first card platform 3 is in contact with the lower end face of the second card platform 5.

[0026] In the present invention, the die body 1 is first placed under the forging hammer, and then the cushion block 4 is inserted into the forging hole 3. The support block 6 on the cushion block 4 is inserted into the through hole of the first clamping table 3. The second clamping table 5 at the upper end of the support block 6 overlaps the upper end surface of the first clamping table 3. Then, the high-temperature blank 8 is placed in the forging hole 2, and the lower end surface of the blank 8 abuts against the upper end surface of the second clamping table 5. When the forging hammer forges and punches the blank 8, a punch 7 is provided on the forging hammer. The punch 7 impacts the blank 8 to deform the blank, and the blank is in contact with the die body 1. The side will extend upward and flow, and the friction force will drive the die body 1 to bounce upward; when the forging hammer impacts the blank 8 downward, it will generate downward pressure on the cushion block 4. In this embodiment, since the second clamping platform 5 is overlapped on the first clamping platform 3, the second clamping platform 5 can transmit the downward pressure to the first clamping platform 3, overcome the upward friction force of the die body 1, and prevent the die body 1 from bouncing upward. The forging process can be more stable and the forging efficiency is improved. After the punching forging is completed, the die body 1 is turned over and the cushion block 4 is forged downward to complete the demolding.

[0027] Furthermore, the inner wall of the forging hole 2 is an inclined structure, the upper diameter of the forging hole 2 is larger than the lower diameter, and the angle between the inner wall of the forging hole 2 and the axis is 0.5° to 1°, so demolding can be easier during the demolding process.

[0028] Furthermore, the cushion block 4 is concentrically arranged with the mold body 1 .

[0029] Furthermore, there is a clearance fit between the cushion block 4 and the mold body 1 , and the distance between the cushion block 4 and the mold body 1 is 1.5 mm to 2 mm, which can facilitate the cushion block 4 to enter the mold body 1 and be taken out from the mold body 1 .

[0030] It should be noted that the cushion block 4 includes a support block 6 and a second clamping platform 5, so the gap distance between the outer wall of the support block 6 and the inner wall of the through hole on the first clamping platform 3 is 1.5mm~2mm. Similarly, the gap distance between the outer wall of the second clamping platform 5 and the inner wall of the forging hole 2 is also 1.5mm~2mm.

[0031] Furthermore, there is a rounded transition between the upper end face of the first clamping platform 3 and the inner wall of the through hole, there is a rounded transition between the upper end face of the first clamping platform 3 and the inner wall of the forging hole 2, there is a rounded transition between the second clamping platform 5 and the support block 6, and there is a rounded transition between the lower end face of the second clamping platform 5 and the circumferential surface of the second clamping platform 5, which can facilitate the placement and removal of the pad 4 from the forging hole 2; there is a rounded transition between the upper end face of the mold body 1 and the inner wall of the forging hole 2, which is convenient for the placement and removal of the blank.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A die for tire forging, characterized in that: The die body (1) comprises a die body, the die body (1) is provided with a through forging hole (2), a first clamping platform (3) is arranged in the forging hole (2), and the first clamping platform (3) is located at the lower end of the die body (1); A cushion block (4) is slidably arranged in the forging hole (2), the cushion block (4) comprising a second clamping platform (5) and a support block (6), the second clamping platform (5) is located at the upper end of the support block (6), the support block (6) is inserted on the first clamping platform (3), and the second clamping platform (5) is overlapped on the first clamping platform (3).

2. A die for tire forging according to claim 1, characterized in that: The mold body (1) and the first clamping platform (3) are both annular structures, and the support block (6) and the second clamping platform (5) are both cylindrical structures.

3. A die for tire forging according to claim 1, characterized in that: The inner wall of the forging hole (2) is an inclined structure, and the upper diameter of the forging hole (2) is larger than the lower diameter.

4. A die for tire forging according to claim 3, characterized in that: The angle between the inner wall of the forging hole (2) and the axis is 0.5° to 1°.

5. The die for tire forging according to claim 1, characterized in that: The cushion block (4) and the mold body (1) are arranged concentrically.

6. The die for tire forging according to claim 1, characterized in that: There is a clearance fit between the cushion block (4) and the mold body (1).

7. A die for tire forging according to claim 6, characterized in that: The distance between the cushion block (4) and the mold body (1) is 1.5 mm to 2 mm.

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