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Large-scale thin wall gear ring quenching deformation control method

A technology of thin-walled ring gear and quenching deformation, which is applied in the field of heat treatment, can solve problems such as irregular deformation, affecting product quality, and inability to overcome deformation, so as to achieve the effect of preventing deformation

Active Publication Date: 2010-06-30
CHONGQING GEARBOX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the workpiece is heated, cooled, and carburized at high temperature for a long time, due to the effects of the previous machining stress, heating thermal stress, and tissue transformation stress, irregular deformation will occur, which seriously affects the quality of the product.
Since the traditional quenching method is to directly carburize and quench the large thin-walled ring gear, this method cannot overcome the deformation that occurs during carburizing and quenching

Method used

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  • Large-scale thin wall gear ring quenching deformation control method
  • Large-scale thin wall gear ring quenching deformation control method
  • Large-scale thin wall gear ring quenching deformation control method

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0028] The first step is to make the mold.

[0029] Such as figure 1 , figure 2 , image 3 As shown, the special mold for quenching deformation control of the ring gear is composed of an inner mold 5, a spacer 4, a support block 1 and a connecting bolt 3 and other components. The inner mold 5 is in the shape of a ring. There are 12 supporting bases 6, and each supporting base 6 is connected with a spacer 4 through bolts 7, and each spacer 4 is connected with the support block 1 through two upper and lower connecting bolts 3, and each spacer Three nuts 2 are installed on the bolt rod between the block 4 and the support block 1, and at the same time, three suspension rings 8 are evenly distributed on the circular upper surface of the inner mold 5; the guide plate is welded on the outer edge of the lower end of the support block 1 9.

[0030] The second st...

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Abstract

The invention discloses a large-scale thin wall gear ring quenching deformation control method, and after making a mould and regulating the mould, the large-scale thin wall gear ring quenching strain control is realized by using the following four steps of: A, putting the large-scale thin wall gear ring into a heating oven to heat to enable the inside diameter to swell, and then hanging and putting the mould into the inner hole of the large scale thin wall gear ring; B, hanging the heated large-scale thin wall gear ring and the mould out of the oven, then putting into the medium to quench and enable the inner hole of the large scale thin wall gear ring to contract and the support block of the mould to support the inner wall of the large scale thin wall gear ring; C, keeping the large-scale thin wall gear ring and the mould at a state of being quenched and molded, and hanging into the heating oven for low tempering; and D, hanging the large-scale thin wall gear ring and the mould out of the heating oven, cooling in the air and detaching the mould. By using the specially shaped mold in the process of quenching, the invention can effectively prevent the deformation after the large-scale thin wall gear ring is quenched.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, in particular to a quenching deformation control method for a large thin-walled ring gear. Background technique [0002] With the rapid development of modern industry, the heat treatment deformation control of the workpiece has gradually become the main index to measure the heat treatment quality, especially the deformation control of large thin-walled ring gears. Carburizing and quenching is the most widely used heat treatment method in the gear industry, with the best comprehensive properties such as surface hardness, wear resistance, contact and bending fatigue strength. However, when the workpiece is heated, cooled and carburized at high temperature for a long time, due to the effects of the previous machining stress, heating thermal stress and tissue transformation stress, irregular deformation will occur, which seriously affects the quality of the product. Since the traditional quen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/32C21D11/00
Inventor 宗康伦赵芸胡昭南党黛梅党军玲仲博颖
Owner CHONGQING GEARBOX
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