Precision forging die device for cross lock catch of flange shaft part

Abstract

The utility model discloses a flange shaft part cross lock catch precision forging die device which comprises an upper die tool and a lower die tool, the upper die tool is matched with the lower die tool, the upper die tool comprises a disc-shaped upper die base, an annular lock catch boss is arranged on the surface of the upper die base, a flange shaft upper cavity is formed in the surface of the upper die base, and a flange shaft is arranged in the flange shaft upper cavity. The lower die tool comprises a disc-shaped lower die base, an annular lock catch groove is formed in the surface of the lower die base, a flange shaft lower cavity is formed in the surface of the lower die base, and four groove lock catches are arranged in the circumferential direction of the lock catch groove. According to the flange shaft part cross lock catch precision forging die device, the depth and width of the lock catch are increased, the draft angle of the circumference where the lock catch is located is controlled, the upper and lower gaps after upper and lower cavities of a flange shaft are assembled and the corresponding allowance of the upper and lower cavities and a blank are adjusted, and the upper and lower die dislocation amount is reduced; the working procedure problem that the trimming allowance of the flange shaft part is large is solved.

Description

Technical Field

[0001] This utility model relates to a forging equipment, and more specifically, to a precision forging die device for a cross-locking flange shaft part. Background Technology

[0002] The existing flange and flange shaft forgings are forged step by step in the process of heating, pre-forging, precision forging, punching and trimming. Among them, the precision forging process directly affects the accuracy and surface quality of the forgings. Existing precision forging dies often have forging problems such as large flash after die closing that is difficult to remove and misaligned dies affecting the positioning reference of machining. Improvements are needed to address these issues. Utility Model Content

[0003] Therefore, it is necessary to provide a precision forging die device for the cross-locking mechanism of flange shaft parts to address the above-mentioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A precision forging die device for a cross-locking flange part is characterized in that the precision forging die device for the cross-locking flange part includes an upper die fixture and a lower die fixture, wherein the upper die fixture and the lower die fixture cooperate with each other.

[0006] The upper mold fixture includes a disc-shaped upper mold base. The surface of the upper mold base is provided with an annular locking boss. The surface of the upper mold base is provided with a flange shaft upper cavity. The locking boss has four locking bosses around its circumference.

[0007] The lower mold fixture includes a disc-shaped lower mold base. The surface of the lower mold base is provided with an annular locking groove. The surface of the lower mold base is provided with a flange shaft lower cavity. The locking groove has four groove locking holes circumferentially.

[0008] The groove latch cooperates with the boss latch.

[0009] In a preferred embodiment of this utility model, the groove latch and the boss latch are in clearance fit, with a clearance of less than or equal to 0.3 mm.

[0010] In a preferred embodiment of this utility model, the circumferential clearance between the groove latch and the boss latch is less than or equal to 0.4 mm.

[0011] In a preferred embodiment of this utility model, the mold closing gap between the upper cavity of the flange shaft and the lower cavity of the flange shaft is between 1.8 mm and 2.4 mm.

[0012] In a preferred embodiment of this utility model, the draft angle of the circumferential wall of both the locking boss and the locking groove is less than 1°.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model provides a precision forging die device for cross-locking flange shaft parts. This precision forging die device for cross-locking flange shaft parts adjusts the upper and lower gaps after the upper and lower cavities of the flange shaft are closed and the allowances corresponding to the upper and lower cavities and the blank by increasing the depth and width of the lock and controlling the draft angle of the circumference where the lock is located. It is designed as a cross-locking structure. The shrinkage ratio of the flange shaft forging after forging meets 1.014:1, which reduces the misalignment of the upper and lower dies, solves the process problem of large trimming allowance of flange shaft parts, improves the forging accuracy and surface quality of flange shafts, makes the machining datum more accurate, and improves the yield rate of flange shaft parts in the machining process. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the upper mold tooling of the precision forging mold device for the cross-locking flange shaft parts of this utility model.

[0017] Figure 2 for Figure 1 A three-dimensional structural diagram of the lower die tooling of the precision forging die device for the cross-locking flange shaft parts in the middle;

[0018] Figure 3 This is a three-dimensional structural diagram of the precision forging die device for the cross-locking buckle of the flange shaft part according to this utility model.

[0019] Figure 4 This is a schematic diagram of the use of the precision forging die device for the cross-locking of flange shaft parts according to this utility model. At this time, the pre-forged product is placed into the die device.

[0020] Figure 5 This is a schematic diagram of the use of the precision forging die device for the cross-locking buckle of the flange shaft part of this utility model, at which point the precision forging product is obtained;

[0021] The markings in the diagram are explained as follows: 1. Upper mold fixture; 1-1. Upper mold base; 1-2. Locking boss; 1-2a. Boss locking; 1-3. Upper cavity of flange shaft; 2. Lower mold fixture; 2-1. Lower mold base; 2-2. Locking groove; 2-2b. Groove locking; 2-3. Lower cavity of flange shaft. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the precision forging die device for the cross-locking flange shaft part includes an upper die fixture 1 and a lower die fixture 2, which cooperate with each other.

[0024] The upper mold fixture 1 includes a disc-shaped upper mold base 1-1. The surface of the upper mold base 1-1 is provided with an annular locking boss 1-2. The surface of the upper mold base 1-1 is provided with a flange shaft upper cavity 1-3. The locking boss 1-2 is provided with four locking bosses 1-2a in the circumferential direction.

[0025] The lower mold tooling 2 includes a disc-shaped lower mold base 2-1. The surface of the lower mold base 2-1 is provided with an annular locking groove 2-2. The surface of the lower mold base 2-1 is provided with a flange shaft lower cavity 2-3. The locking groove 2-2 is provided with four groove locking 2-2b in the circumferential direction.

[0026] The groove latch 2-2b cooperates with the boss latch 1-2a, and the latch groove 2-2 and the latch boss 1-2 form a cross-shaped structure.

[0027] It should be noted that the groove latch 2-2b and the boss latch 1-2a are in clearance fit, with a clearance of less than or equal to 0.3mm.

[0028] The circumferential clearance between the groove latch 2-2b and the boss latch 1-2a is less than or equal to 0.4mm.

[0029] The mold closing gap between the upper cavity 1-3 and the lower cavity 2-3 of the flange shaft is between 1.8mm and 2.4mm.

[0030] The draft angle of the circumferential wall of the locking boss 1-2 and the locking groove 2-2 is less than 1°.

[0031] The following describes the working principle of the precision forging die device for the cross-locking mechanism of this flange shaft part, including the following steps:

[0032] Step S1: As Figure 4 As shown, place the pre-forged product A into the corresponding position on the lower die tooling 2;

[0033] Step S2: As Figure 5 As shown, start the equipment, and the upper die fixture 1 performs precision forging from top to bottom in the direction of the arrow to obtain precision forged product B.

[0034] This precision forging die device for flange shaft parts with cross-locking is designed as a cross-locking structure by increasing the depth and width of the lock and controlling the draft angle of the circumference where the lock is located to adjust the upper and lower gaps after the upper and lower cavities of the flange shaft are closed and the allowances corresponding to the upper and lower cavities and the blank. The shrinkage ratio of the forged flange shaft part meets 1.014:1, which reduces the misalignment of the upper and lower dies, solves the process problem of large trimming allowance of flange shaft parts, improves the forging accuracy and surface quality of flange shaft parts, makes the machining datum more accurate, and improves the yield rate of the machining process of flange shaft parts.

[0035] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A precision forging die device for a cross-locking mechanism for flange shaft parts, characterized in that, The precision forging die device for the cross-locking flange shaft part includes an upper die fixture (1) and a lower die fixture (2), wherein the upper die fixture (1) and the lower die fixture (2) cooperate with each other. The upper mold fixture (1) includes a disc-shaped upper mold base (1-1). The surface of the upper mold base (1-1) is provided with an annular locking boss (1-2). The surface of the upper mold base (1-1) is provided with a flange shaft cavity (1-3). The locking boss (1-2) is provided with four boss locking (1-2a) in the circumferential direction. The lower mold tooling (2) includes a disc-shaped lower mold base (2-1). The surface of the lower mold base (2-1) is provided with an annular locking groove (2-2). The surface of the lower mold base (2-1) is provided with a flange shaft lower cavity (2-3). The locking groove (2-2) is provided with four groove locking (2-2b) in the circumferential direction. The groove latch (2-2b) cooperates with the boss latch (1-2a).

2. The precision forging die device for the cross-locking buckle of the flange shaft part according to claim 1, characterized in that, The groove latch (2-2b) and the boss latch (1-2a) are in clearance fit, with a clearance of less than or equal to 0.3 mm.

3. The precision forging die device for the cross-locking buckle of the flange shaft parts according to claim 2, characterized in that, The circumferential clearance between the groove latch (2-2b) and the boss latch (1-2a) is less than or equal to 0.4 mm.

4. The precision forging die device for the cross-locking buckle of the flange shaft part according to claim 1, characterized in that, The mold closing gap between the upper cavity (1-3) and the lower cavity (2-3) of the flange shaft is between 1.8 mm and 2.4 mm.

5. The precision forging die device for the cross-locking buckle of the flange shaft part according to claim 1, characterized in that, The draft angle of the circumferential wall of the locking boss (1-2) and the locking groove (2-2) is less than 1°.

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