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Stepped shaft forging method in free forging

A stepped shaft and step technology, which is applied in the field of stepped shaft forging, can solve problems such as difficulty in clamping round blanks, scrapped blanks, inaccurate shoulder pressing positions, etc., to improve production efficiency and product quality, save material in rounding processing, and shoulder pressing The effect of the correct position

Active Publication Date: 2012-02-08
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 are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation 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, and the diameter of the step shaft from left to right is D 1 ,D 2 ,…D n , the length is L 1 , L 2 ,... L n , if the maximum diameter is D n Turn the forging around, 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 interchange, and so on;

[0044] Such as figure 1 As shown, this embodiment is a four-step stepped shaft forgi...

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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 the blank. 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 free forging of multi-level step shaft is to select a suitable blank according to the principle of constant volume, forge it into a circular cross section, and then design the process based on the circular cross section. The whole free forging process is as follows: [0003] Based on the circular section, process design and calculation are carried out to determine the segmentation position; [0004] Carry out shoulder (indentation) treatment at the section; [0005] For the round billets that have been processed by shoulder pressing, repeatedly forge and elongate section by section until the required diameter of the section; [0006] For the shaft section that has been forged, if you need to continue forging in sections, repeat the above steps; [0007] After the ...

Claims

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Application Information

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Patent Type & Authority Applications(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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