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Inner hole protection device and method during long-barrel-shaped part heat treatment carburizing

A technology for protection devices and parts, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as difficult operation, uneven copper plating, poor protection effect, etc., to achieve simple operation and guarantee The effect of production quality

Inactive Publication Date: 2021-08-24
XI'AN AIRCRAFT INTERNATIONAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional carburizing protection methods include: brushing anti-carburizing paint, copper plating, reserving a machining allowance greater than the carburizing depth, etc. For cylindrical parts with long inner holes such as screws, non-carburizing inner hole brushes The anti-carburizing coating is difficult to operate, and the copper plating is easy to be uneven and the protective effect is not good. Using the reserved processing allowance will cause the surface hardness of the carburized inner hole to be higher, and the inner hole processing is very difficult. How to solve the above problems has become a solution The key to carburizing production of long cylindrical parts

Method used

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  • Inner hole protection device and method during long-barrel-shaped part heat treatment carburizing
  • Inner hole protection device and method during long-barrel-shaped part heat treatment carburizing
  • Inner hole protection device and method during long-barrel-shaped part heat treatment carburizing

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Embodiment Construction

[0013] Referring to the accompanying drawings, the elongated tubular parts involved in the present application are as figure 1 As shown, the part has a deep and thin inner hole, and the heat treatment carburizing inner hole protection of this type of part cannot be realized by using the existing technology. For this reason, the long cylindrical part heat treatment carburizing inner hole protection device proposed by this application is as follows: figure 2 As shown, the device contains a base 3 and a pull rod 2, and the pull rod 2 is fixed on the base 3. The base 3 is a round basin with an open upper end and has a sunken cavity. The lower end of the pull rod 2 is connected to the bottom of the base 3 sunken cavity In the center, an annular groove 4 is formed on the outer side of the lower end of the pull rod 2, the width of the ring groove 4 is greater than the wall thickness of the long cylindrical part 1, the outer diameter of the pull rod 2 is smaller than the inner diamet...

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Abstract

The invention discloses an inner hole protection device and method during long-barrel-shaped part heat treatment carburizing. The protection device is composed of a base and a pull rod, the pull rod is fixed on the base, the base is provided with an annular groove with the thickness larger than that of a part, and a hoisting hole is reserved in the upper end of the pull rod so that the device can be conveniently hung. The long-barrel-shaped part is connected to the outer side of the pull rod in a sleeving mode, the lower end of the long-barrel-shaped part and the annular groove of the base are sealed, and carburizing treatment can be conducted by sealing the upper end of the long-barrel-shaped part and the pull rod. According to the inner hole protection device and method,the problems of difficulty in inner hole protection and poor protection effect during heat treatment carburizing of the barrel-shaped part are solved, and the protection device further has a certain anti-deformation effect, operation is easy and fast, and the part production quality is guaranteed.

Description

technical field [0001] The invention relates to the field of heat treatment of aircraft parts, in particular to a carburized inner hole protection device and method for heat treatment of long cylindrical parts. Background technique [0002] At present, in aviation manufacturing, carburizing is widely used because it can provide a high-hardness wear-resistant surface. In actual parts, only some parts of the wear-resistant contact need to be carburized, and the rest of the surface, especially the inner parts that do not need high wear resistance. The surface or inner pores do not need carburizing due to the need to maintain good toughness. When the parts are carburized, it is necessary to protect the surface of the parts that do not need carburizing to prevent the toughness from being reduced due to carburizing. Traditional carburizing protection methods include: brushing anti-carburizing paint, copper plating, reserving a machining allowance greater than the carburizing dept...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/04
CPCC23C8/04
Inventor 李向利杨平陈素明
Owner XI'AN AIRCRAFT INTERNATIONAL
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