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Stepped shaft forging method in free forging

A step shaft and step technology, applied in the field of step shaft forging, can solve the problems of difficult clamping of round blanks, inconvenient operation, scrapping of blanks, etc., so as to improve production efficiency and product quality, solve clamping difficulties, and correct the position of pressing shoulders. Effect

Active Publication Date: 2012-11-14
NANJING DEV ADVANCED MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is difficult to clamp the round blank, and the operation is inconvenient, so that the position of the shoulder pressure is often inaccurate, resulting in insufficient material on one side of the shoulder and too much material on the other side. scrapped

Method used

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  • Stepped shaft forging method in free forging
  • Stepped shaft forging method in free forging
  • Stepped shaft forging method in free forging

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Embodiment Construction

[0041] The embodiments of the present invention will be described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention. Detailed implementation modes and specific operation procedures are given, but the protection scope of the present invention is not limited to the following implementations. example.

[0042] Such as Figure 8 As shown, this embodiment includes the following steps:

[0043] (1) Read the parameters of the step shaft forging: the diameter and length of each step, the material density r, the diameter of the step shaft from left to right is D 1 , D 2 ,...D n , Length is L 1 , L 2 ,...L n , If the maximum diameter is D n U-turn the forging, that is, swap the diameter and length: D 1 With D n Interchange, L 1 With L n Swap, D 2 With D n-1 Interchange, L 2 With L n-1 Swap, and so on;

[0044] Such as figure 1 As shown, this embodiment is a four-stage stepped shaft forging, and the relevant dimensions are as foll...

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Abstract

The invention discloses a stepped shaft forging method in free forging, which includes the steps of forging a blank to be a regular octagonal piece before the process of flattening, then calculating the volume of the material of each step, converting the volume of the material to the length of the material of the regular octagonal section, and finally flattening the corresponding positions of theblank. By forging the blank to be a piece with a regular octagonal section instead of a round section before the process of flattening in the processes of forging and stamping the stepped shaft, the method effectively solves problem of difficulty in holding the blank and ensures right flattening positions. The regular octagonal section is close to the round section in shape, so the material can be saved in the late rounding process. The method improves production efficiency and product quality and reduces defective and waste product rates.

Description

Technical field [0001] The invention relates to a forging method of a stepped shaft, in particular to a forging method of a stepped shaft in free forging. Background technique [0002] The traditional method of multi-step shaft free forging is to select a suitable blank according to the principle of constant volume, and forge it into a circular section, and then design the process based on this circular section. The entire free forging process is as follows: [0003] Based on the circular cross section, process design and calculation, and determine the position of the segment; [0004] Perform shoulder (indentation) treatment at the segment; [0005] For the round blank processed by the shoulder pressing, repeatedly forging and drawing section by section until the required diameter of the section; [0006] For shaft sections that have been forged, if you need to continue forging in sections, repeat the above steps; [0007] After forging, cut off the material head. [0008] It can be se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/06
Inventor 张利徐元生史翔杨清林周伯荣
Owner NANJING DEV ADVANCED MFG
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