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Spline Shaft Forging Process of Drive Shaft

A technology of spline shaft and transmission shaft, which is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problems of increasing mold processing cost, large processing volume of spline shaft, and difficulty in forming forgings, etc. The effect of saving replacement time, reducing the amount of machining, and reducing the cost of mold making

Active Publication Date: 2015-12-09
XUCHANG ZHONGXING FORGING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] That is, the traditional flat forging die has the following defects in the forging process of the spline shaft: 1. Since the free upsetting ratio of the forging exceeds 3.0, the forming of the forging is difficult and the scrap rate of the forging is high; 2. The production efficiency is low and the production cost 3. There is one more aggregated mold body on the mold, which brings inconvenience to the mold processing and increases the mold processing cost; 4. The inner diameter of the shaft body cavity of the pre-forging cavity and the final forging cavity is 35mm, and the forged flower The rod part of the key shaft has a relatively large amount of processing, which wastes a lot of raw materials

Method used

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  • Spline Shaft Forging Process of Drive Shaft
  • Spline Shaft Forging Process of Drive Shaft
  • Spline Shaft Forging Process of Drive Shaft

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Embodiment Construction

[0020] Such as image 3 and Figure 4 As shown, the drive shaft spline shaft forging process of the present invention comprises the following steps:

[0021] (1), blanking: the diameter of the blank is 32mm, the material is 40Cr, and the length is 193.5mm;

[0022] (2) Intermediate frequency heating: the temperature of intermediate frequency heating is 950°C~1050°C, and the heating time is 5~5.5 minutes;

[0023] (3) Pre-forging: Put the intermediate frequency heated blank into the cavity of the pre-forging die body of the spline shaft flat forging die on the flat forging machine, control the flat forging machine, and the power drive end drives the pre-forging punch body to stamp Rough material, stamping the blank material into a pre-forging of the spline shaft, the total length L1 of the pre-forging is 165 mm, the length L2 and outer diameter D1 of the shaft body 28 of the pre-forging are 120 mm and 32 mm respectively, and the outer diameter of the shaft head of the pre-for...

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Abstract

The invention relates to a novel technology for forging a spline shaft of a transmission shaft. The novel technology includes following steps: (1), blanking; (2), medium-frequency heating; (3), pre-forging: after the medium-frequency heating, a blank material is placed in a cavity of a pre-forging die body of a spline shaft hammer forging die on a hammer forging machine, the hammer forging machine is controlled, a power drive end drives the pre-forging die body to stamp the blank material, and the blank material is stamped into a pre-forging piece of the spline shaft; (4), finish-forging: the pre-forging piece is placed in a cavity of a finish-forging die body of the spline shaft hammer forging die on the hammer forging machine, the hammer forging machine is controlled, the power drive end drives the finish-forging die body to stamp the pre-forging piece, and the pre-forging is stamped into a finish-forging piece. The novel technology is reasonable in design and simple in structure, forging pieces are easy to be formed, and rejection rate of the forging pieces is greatly lowered. Gathering process is eliminated, production efficiency is improved, and production cost and die making cost are lowered. Inner diameters of shaft body cavities of a pre-forging cavity and a finish-forging cavity are reduced, and processing amount of a machine is reduced and raw material is saved.

Description

technical field [0001] The invention belongs to the technical field of automobile industry, and in particular relates to a forging process of a transmission shaft spline shaft. Background technique [0002] At present, the forging process under the mold structure under the traditional spline shaft forging technology is: blanking-intermediate frequency heating-gathering-pre-forging-final forging. Using this mold to complete the forging of the forging, the increase of the gathering process not only increases The cost of mold materials and mold processing is increased, and the mold production cycle is increased. Only in mold production, the production cost is greatly increased. In addition, the increase of this work step reduces production efficiency and increases labor hours, which is also invisible. Increased labor production costs. [0003] That is, the traditional flat forging die has the following defects in the forging process of the spline shaft: 1. Since the free upset...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02B21J13/02
Inventor 孟会涛刘其勇郭艳珺胡卫华张恒王永桃丁圣杰安伟浩陈喜乐史增峰宋航
Owner XUCHANG ZHONGXING FORGING
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