Integral combined tooth gear forging process with punching performed before combined tooth forming

A technology of gear forging and combining teeth, applied in the field of integral combined tooth gear forging technology, can solve the problems of large forming load and low die life, and achieve the effects of reducing forming load, improving service life and reducing production cost.

Inactive Publication Date: 2019-09-10
SHANGHAI AUTOMOBILE GEAR WORKS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of large forming load and low die life in the production of integral combined tooth gears in the existing process, the present invention proposes an integral combined tooth gear forging process in which the combined teeth are punche

Method used

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  • Integral combined tooth gear forging process with punching performed before combined tooth forming
  • Integral combined tooth gear forging process with punching performed before combined tooth forming
  • Integral combined tooth gear forging process with punching performed before combined tooth forming

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Example Embodiment

[0018] Such as figure 1 As shown, this embodiment takes the reverse gear driven tooth in a certain automobile transmission as an example (the large diameter of the combined tooth is Trail is The forging process of integral combined tooth gear is described, which is to punch first and then form the combined tooth.

[0019] This embodiment includes the following steps:

[0020] Cutting: According to the requirement of 1.832kg for the weight of the reverse driven gear forging, choose a cylindrical bar with a diameter of 60mm, calculate the length of the blank to be 82.54mm, use a circular saw for cutting, and the cutting tolerance is controlled within 0-15g between;

[0021] Shot blasting: A drum shot blasting machine with a steel shot diameter of 1.5mm is used to blast the blank, and the shot blasting time is set to 20 minutes;

[0022] Heating: A three-stage intermediate frequency heating furnace is used to heat the shot blasted bar, and the heating temperature range is 1000±20℃;

[0...

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Abstract

The invention relates to an integral combined tooth gear forging process with punching performed before combined tooth forming. The integral combined tooth gear forging process is characterized in that a blank is shaped, then blank making and pre-forging are sequentially performed, a middle connected sheet of a pre-forged piece is removed through punching, and finally final forging forming is performed. According to the integral combined tooth gear forging process, the combined tooth portion is formed by using an upsetting and extruding combined method so that a gear forge piece with qualifiedsize precision and performance can be obtained under the conditions of relatively low forming load and relatively long mold service life.

Description

technical field [0001] The invention relates to a technology in the field of automobile manufacturing, in particular to an integral combined gear forging process in which the combined teeth are punched first and then formed. Background technique [0002] At present, the forged billet of the integral combined tooth gear in the automobile gearbox is mainly obtained after billet making, pre-forging, final forging and punching. This process mainly adopts piercing tooth or tooth extrusion method in the final forging to form the combined tooth. Among them, the pier tooth method is to design the diameter of the part of the pre-forged part used to form the combined tooth to be smaller than the small diameter of the combined tooth; and the tooth extrusion method is to design the diameter of the part of the pre-forged part used to form the combined tooth to be larger than the major diameter of the combined tooth. The main disadvantages of this method are that the forming load is larg...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J13/02B21K1/30
CPCB21J5/002B21J13/02B21K1/30
Inventor 吴先洋周煊张海英张浩陈楚文吴德
Owner SHANGHAI AUTOMOBILE GEAR WORKS
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