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Process for shaping out-of-round internal gear parts

A technology for internal gears and parts, which is applied in the field of out-of-round shaping technology of internal gear parts, can solve the problems of low qualified rate of finished products and difficult control of out-of-round deformation, and achieve the effects of increasing the qualified rate, avoiding waste, and simple steps

Inactive Publication Date: 2010-07-21
SHANGHAI QICHUN THERMAL TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the shape of the internal gear is similar to a "crown" with a large diameter and thin wall (outer diameter 200-300mm / wall thickness 5-15mm). It is difficult to control the out-of-round deformation after heat treatment, resulting in a low qualified rate of finished products. about 80%

Method used

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  • Process for shaping out-of-round internal gear parts
  • Process for shaping out-of-round internal gear parts
  • Process for shaping out-of-round internal gear parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] The internal gear parts 6 after heat treatment processes such as low-pressure carburizing, high-pressure gas quenching, and tempering are subjected to shot blasting, and then the heat-treated internal gear parts 6 are tested for out-of-round dimensions with the out-of-round gauge, and the maximum out-of-roundness is calibrated. position; the out-of-round size is divided into 10 grades; such as figure 1 As shown, it is a schematic structural diagram of the out-of-circle inspection tool. The out-of-circle inspection tool includes a bottom plate 1, on which two vertically distributed fixing blocks 2 are arranged, and a dimension dial indicator 3 is also provided on the bottom plate 1 for To measure the runout range of the outer circle of the internal gear part 6 for one revolution, the dimension indicator 3 is arranged opposite to a fixed block 2, and the internal gear part 6 is placed between the fixed block 2 and the dimension indicator 3.

[0014] Such as figure 2 As ...

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Abstract

The invention provides a process for shaping out-of-round internal gear parts. The process is characterized by comprising the following steps of: 1, detecting the out-of-round sizes of the heat-treated internal gear parts by using an out-of-round detector, calibrating the position of the most out-of-round parts and grading the out-of-round sizes; and 2, placing the most out-of-round parts of the same-grade internal gear parts between two flat slabs connected with each other by bolts, adjusting the distance between the two flat slabs to clamp, and after clamping, placing the whole assembly into a drying oven to temper. The process has the advantages of increasing product qualified yield and avoiding waste during production through the simple steps.

Description

technical field [0001] The invention relates to an out-of-round shaping process for internal gear parts, which is used for adjusting the out-of-round deformation of the inner gear parts in an automatic gearbox after carburizing and quenching. Background technique [0002] In the prior art, the internal gear parts in the automatic transmission adopt the world's advanced low-pressure carburizing + high-pressure gas quenching heat treatment process. Among them, the shape of the internal gear is similar to a "crown" with a large diameter and thin wall (outer diameter 200-300mm / wall thickness 5-15mm). It is difficult to control the out-of-round deformation after heat treatment, resulting in a low qualified rate of finished products. It is about 80%. Contents of the invention [0003] The purpose of the present invention is to provide a process for shaping the out-of-roundness of internal gear parts, so as to improve the qualified rate of internal gear parts. [0004] In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/32
Inventor 孔铭
Owner SHANGHAI QICHUN THERMAL TREATMENT