Cold heading forming die for flexible holding lock pin

Abstract

The utility model relates to the technical field of cold heading forming, in particular to a flexible embracing lock pin cold heading forming die which comprises a lower die base and an upper die base, a lower base plate is fixedly installed on the lower die base, a lower die fixing plate is fixedly installed on the lower base plate, a lower die fixing block is fixedly installed in the lower die fixing plate through a bolt, and the lower die fixing block is fixedly installed on the upper die base through a bolt. A lower die sliding block is connected into the lower die fixing plate in a sliding mode. Compared with the prior art, the cold heading device has the advantages that due to the arrangement of the nitrogen springs, a lock pin needing to be machined can be fully held tightly and then subjected to cold heading operation in the downward moving process of the upper die base, the lock pin is not thickened in the cold heading process, and the elasticity of the nitrogen springs can prevent the situation that a die is damaged due to the fact that the lateral force of a lower die sliding block is too large; the die is simple in structure and safer in production, solves the problems of insufficient holding force and burrs of products, improves the quality of the products, can protect the die, reduces the production cost, and ensures the practicability of the die.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading, in particular to a cold heading mould for a flexible locking pin. Background Art

[0002] like Figure 4 As shown, the connection between the inclined slide block and the upper die seat of the existing lock pin cold heading forming die is mostly a rigid connection, and cold heading is performed while clamping. If the clamping force is insufficient, burrs will appear on the product, which greatly affects the product quality.

[0003] In this regard, the utility model provides a flexible locking pin cold heading forming die to solve the problem. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the utility model is to provide a flexible locking pin cold heading forming die to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a flexible holding lock pin cold heading forming die, comprising a lower die base and an upper die base, a lower pad is fixedly installed on the lower die base, a lower die fixing plate is fixedly installed on the lower pad, a lower die fixing block is fixedly installed inside the lower die fixing plate by bolts, a lower die slider is slidably connected inside the lower die fixing plate, and a lock pin is clamped between the lower die fixing block and the lower die slider;

[0007] An upper pad is fixedly installed on one side of the upper die seat, an upper die fixing plate is fixedly installed on one side of the upper pad, a nitrogen spring is fixedly installed on one side of the upper die seat by bolts, an inclined wedge block is fixedly installed on one side of the nitrogen spring, and a forming mold is fixedly installed on one side of the upper die fixing plate.

[0008] Preferably, any of the above schemes is that a guide sleeve is fixedly mounted on one side of the upper die base, a guide column is slidably connected inside the guide sleeve, and one side of the guide column is fixedly mounted on one side of the lower die base.

[0009] The technical effect achieved by adopting the above scheme is: playing a guiding role.

[0010] Preferably, any of the above schemes has a mounting groove on one side of the lower die base and the lower pad, a spring is fixedly mounted on the bottom of the inclined wedge block, the spring is located inside the mounting groove, and one side of the spring is fixedly mounted on one side of the spring.

[0011] Preferably, any of the above schemes has a sliding hole on one side of the lower die fixing plate, a push rod is slidably connected inside the sliding hole, and one side of the push rod is fixedly mounted on one side of the lower die slider.

[0012] Preferably, any of the above schemes has a positioning block overlapped on the top of the lower pad, the positioning block is located between the lower die fixed block and the lower die sliding block, and the positioning block is fixed to the top of the lower pad by bolts.

[0013] The technical effect achieved by adopting the above solution is: achieving a positioning effect.

[0014] Preferably, any of the above schemes is that a limiting groove is formed on one side of the upper die seat, the upper pad and the upper die fixing plate, and the outer portion of the nitrogen spring is sleeved in the inner portion of the limiting groove.

[0015] Preferably, according to any of the above solutions, the forming die is located above the positioning block.

[0016] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0017] The utility model adopts the setting of the nitrogen spring, which can fully clamp the locking pin to be processed before the cold heading operation is carried out during the downward movement of the upper die seat, and the locking pin does not become thicker during the cold heading process. The elasticity of the nitrogen spring can prevent the lateral force of the lower die slide from being too large, which may cause damage to the die. The production is safer, and the problem of insufficient clamping force and burrs on the product is solved, which improves the product quality, protects the die, reduces the production cost, and ensures the practicability of the die.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic cross-sectional structure diagram according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure according to the first viewing angle of an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a second viewing angle according to an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of an existing lock pin cold heading forming die.

[0024] In the figure: 1-lower die base, 2-upper die base, 3-lower pad, 4-lower die fixing plate, 5-lower die fixing block, 6-lower die slide, 7-upper pad, 8-upper die fixing plate, 9-nitrogen spring, 10-angled wedge block, 11-spring, 12-push rod, 13-molding die, 14-locking pin, 15-positioning block. DETAILED DESCRIPTION

[0025] Example: Figure 1 to Figure 2 As shown, a flexible locking pin cold heading forming die comprises a lower die base 1 and an upper die base 2. A lower pad 3 is fixedly mounted on the lower die base 1, a lower die fixing plate 4 is fixedly mounted on the lower pad 3, a lower die fixing block 5 is fixedly mounted inside the lower die fixing plate 4 by bolts, a lower die slide block 6 is slidably connected inside the lower die fixing plate 4, and a locking pin 14 is clamped between the lower die fixing block 5 and the lower die slide block 6;

[0026] An upper pad 7 is fixedly installed on one side of the upper die base 2, an upper die fixing plate 8 is fixedly installed on one side of the upper pad 7, a nitrogen spring 9 (known technology) is fixedly installed on one side of the upper die base 2 by bolts, and pressure is applied by the nitrogen spring 9 to press the inclined wedge block 10 so that the inclined wedge block 10 pushes the lower die slide block 6, and then the locking pin 14 is clamped with the cooperation of the lower die fixing block 5, and then the locking pin is cold-forged. An inclined wedge block 10 is fixedly installed on one side of the nitrogen spring 9, and a forming mold 13 (known technology) is fixedly installed on one side of the upper die fixing plate 8.

[0027] A guide sleeve is fixedly installed on one side of the upper die base 2, and a guide column is slidably connected inside the guide sleeve. One side of the guide column is fixedly installed on one side of the lower die base 1. The upper die base 2, the lower die base 1, the guide column, and the guide sleeve are all well-known components of the existing mold. The specific implementation and function are all well-known technologies. The utility model has not made any improvements, so no drawings are shown, but it does not affect the technical personnel to implement it according to the plan. During implementation, the lower die base 1 is fixed, and pressure is applied to the upper die base 2 for cold heading.

[0028] A mounting groove is provided on one side of the lower die base 1 and the lower pad 3 , and a spring 11 is fixedly installed at the bottom of the inclined wedge block 10 . The spring 11 is located inside the mounting groove, and one side of the spring 11 is fixedly installed on one side of the spring 11 .

[0029] A sliding hole is provided on one side of the lower mold fixing plate 4, and a push rod 12 is slidably connected inside the sliding hole. One side of the push rod 12 is fixedly installed on one side of the lower mold slider 6, and the cooperation between the push rod 12 and the sliding hole provides guidance for the movement of the lower mold slider 6.

[0030] A positioning block 15 is overlapped on the top of the lower pad 3, and the positioning block 15 is located between the lower mold fixing block 5 and the lower mold sliding block 6. The positioning block 15 is fixed to the top of the lower pad 3 by bolts, and the positioning block 15 provides positioning for the installation of the lower mold fixing block 5.

[0031] A limiting groove is provided on one side of the upper die base 2 , the upper pad 7 and the upper die fixing plate 8 , and the outer portion of the nitrogen spring 9 is sleeved in the inner portion of the limiting groove.

[0032] The molding die 13 is located above the positioning block 15 .

[0033] A flexible locking pin cold heading forming die, the working principle is as follows:

[0034] The locking pin 14 is placed between the lower die fixing block 5 and the lower die slide block 6. When the upper die base 1 moves downward, the nitrogen spring 9 drives the inclined wedge block 10 to move downward to press the lower die slide block 6. The lower die slide block 6 moves to one side and cooperates with the lower die fixing block 5 to fully hold the locking pin 14 so that it does not loosen. During the downward movement of the upper die base 1, the forming mold 13 is pushed to cold-head the upper end of the locking pin 14. After testing, it is found that burrs can be avoided when the holding force is greater than or equal to 50t.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The utility model, through the arrangement of the nitrogen spring 9, can fully clamp the locking pin 14 to be processed before the cold heading operation during the downward movement of the upper die base 1, and the locking pin 14 does not become thicker during the cold heading process. The elasticity of the nitrogen spring 9 can prevent the lateral force of the lower die slide 6 from being too large, causing damage to the die, making production safer, solving the problem of insufficient clamping force and burrs on the product, improving product quality, protecting the die, reducing production costs, and ensuring the practicability of the die.

Claims

1. A flexible locking pin cold heading forming die, characterized in that: The invention comprises a lower die base (1) and an upper die base (2); a lower pad (3) is fixedly mounted on the lower die base (1); a lower die fixing plate (4) is fixedly mounted on the lower pad (3); a lower die fixing block (5) is fixedly mounted inside the lower die fixing plate (4) by bolts; a lower die sliding block (6) is slidably connected inside the lower die fixing plate (4); a locking pin (14) is clamped between the lower die fixing block (5) and the lower die sliding block (6); An upper pad (7) is fixedly mounted on one side of the upper die seat (2), an upper die fixing plate (8) is fixedly mounted on one side of the upper pad (7), a nitrogen spring (9) is fixedly mounted on one side of the upper die seat (2) via bolts, an inclined wedge block (10) is fixedly mounted on one side of the nitrogen spring (9), and a forming mold (13) is fixedly mounted on one side of the upper die fixing plate (8).

2. According to claim 1, a flexible locking pin cold heading forming die is characterized in that: A guide sleeve is fixedly mounted on one side of the upper die seat (2), a guide column is slidably connected inside the guide sleeve, and one side of the guide column is fixedly mounted on one side of the lower die seat (1).

3. According to claim 2, a flexible locking pin cold heading forming die is characterized in that: A mounting groove is provided on one side of the lower die base (1) and the lower pad (3); a spring (11) is fixedly mounted on the bottom of the inclined wedge block (10); the spring (11) is located inside the mounting groove; and one side of the spring (11) is fixedly mounted on one side of the spring (11).

4. The flexible locking pin cold heading forming die according to claim 3, characterized in that: A sliding hole is provided on one side of the lower die fixing plate (4), and a push rod (12) is slidably connected inside the sliding hole. One side of the push rod (12) is fixedly mounted on one side of the lower die sliding block (6).

5. The cold heading forming die for a flexible locking pin according to claim 4, characterized in that: A positioning block (15) is overlapped on the top of the lower pad (3), and the positioning block (15) is located between the lower die fixing block (5) and the lower die sliding block (6). The positioning block (15) is fixed to the top of the lower pad (3) by bolts.

6. The cold heading forming die for a flexible locking pin according to claim 5, characterized in that: A limiting groove is provided on one side of the upper die seat (2), the upper pad (7) and the upper die fixing plate (8), and the outer portion of the nitrogen spring (9) is sleeved inside the limiting groove.

7. The cold heading forming die for a flexible locking pin according to claim 6, characterized in that: The forming die (13) is located above the positioning block (15).

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