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Die for pre-forming inner holes of deep-hole shaft parts, method for forming inner holes and forming process of deep-hole shaft parts

A technology of preforming and forming parts, applied in the direction of metal extrusion dies, etc., can solve the problems of reducing product performance and material utilization

Inactive Publication Date: 2016-01-27
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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  • Application Information

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Problems solved by technology

However, machining blind holes will cut off the metal flow line, reducing product performance and material utilization

Method used

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  • Die for pre-forming inner holes of deep-hole shaft parts, method for forming inner holes and forming process of deep-hole shaft parts
  • Die for pre-forming inner holes of deep-hole shaft parts, method for forming inner holes and forming process of deep-hole shaft parts
  • Die for pre-forming inner holes of deep-hole shaft parts, method for forming inner holes and forming process of deep-hole shaft parts

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Embodiment Construction

[0030] see below Figure 1 to Figure 10 The mold for preforming the inner hole of the deep-hole shaft part, the method for forming the inner hole and the forming process of the deep-hole shaft part according to the present invention are described in detail.

[0031] Such as figure 1 As shown, the deep hole shaft member 1 usually has an elongated stem 11, a flange 12 is provided at the head of the stem 11, a blind hole 13 is arranged inside the head of the stem 11, and the blind hole 13 The upper part is closed. In the present invention, the deep hole shaft part 1 mainly adopts figure 2 The process flow shown to form, refer to figure 2 As shown, the forming process of deep hole shaft parts mainly includes the following steps:

[0032] Step 1: Carry out a reducing extrusion process on the forming rod part of the deep hole shaft to form figure 2 Formed parts as shown in (a);

[0033] step 2, yes figure 2 The formed part shown in (a) is subjected to secondary diameter r...

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Abstract

The invention provides a die for pre-forming inner holes of deep-hole shaft parts, a method for forming inner holes and a forming process of the deep-hole shaft parts. The die comprises a male die body, a female die body and a male die sleeve arranged outside the male die body in a matched manner. A mold cavity is formed in the female die body. A step part connected with the bottom of an upset head of a forming piece of the deep-hole shaft parts in an abutting manner is formed in the part, located in the mold cavity, on the female die body. When the step that the inner holes are pre-formed through the die is finished, the end face of the bottom end of the male die body should be aligned with the plane part of the step part, and therefore it can be avoided that folding defects happen to the bottoms of flanges when the step that the flanges are formed is conducted, the folding phenomenon happening to the bottoms of the flanges of the deep-hole shaft parts can be avoided, and the forming effect of the deep-hole shaft parts can be ensured.

Description

technical field [0001] The invention relates to a mold for preforming the inner hole of a deep-hole shaft, a method for forming the inner hole and a forming process for the deep-hole shaft. Background technique [0002] Transmission shaft parts are the core components of automobile transmission system. my country's car industry has entered a period of rapid development after the 1990s, and traditional production methods have been unable to meet market requirements. This paper conducts research on the forming process of gearbox deep hole shaft parts. Such as figure 1 Typical features of this type of part are a slender shank, a flanged head, and a blind hole inside, as shown in . At present, the main method of domestic production of this kind of parts is cold extrusion rod part-upsetting extrusion flange-machining blind hole. However, machining blind holes will cut off the metal flow line, reducing product performance and material utilization. If the blind hole is formed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C23/20
CPCB21C23/20B21C25/02
Inventor 邱德花钟志平边翊翟月雯马晓晖陈小辉叶丽燕田钰清
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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