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Method for repairing crack and chipping of shunt ring of case

A repair method and shunt ring technology, applied to furnace types, furnaces, arc welding equipment, etc., can solve the problems of long repair period, large equipment investment, and high repair cost, and achieve low repair cost, small capital investment, and short repair cycle shortened effect

Inactive Publication Date: 2012-05-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this conventional repair method is that the capital investment of the equipment is large, the repair cost is high, and the repair period is long.

Method used

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  • Method for repairing crack and chipping of shunt ring of case
  • Method for repairing crack and chipping of shunt ring of case
  • Method for repairing crack and chipping of shunt ring of case

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described below in conjunction with embodiment.

[0032] This embodiment is a repair method for a block with a length of 93 mm and a width of 64 mm at the lip of the shunt ring of the casing. The specific repair steps are:

[0033] (1) Use a grinding wheel to trim and polish the gap. In order to prevent thermal deformation of the gap, control the grinding speed during the grinding process not to be too fast, and the amount of grinding each time should not be too much. After grinding for one minute, let it cool down, and wait until the temperature drops to room temperature. Continue to grind repeatedly, and finally grind the gap into a regular rectangular gap of 100mm and 65mm wide;

[0034] (2) Carry out coloring inspection on the periphery of the polished notch, and it is qualified if there is no crack;

[0035] (3) Make patches:

[0036] Use the wire cutting method to cut the material with a length of 110 mm and a width of 75 mm...

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Abstract

The invention relates to a method for repairing a crack and a chipping a shunt ring of a case, which comprises the following steps of: (1) trimming and polishing the chipping part of the shunt ring to form a square or oblong notch by using an air drill and a grinding wheel; (2) performing dyeing inspection on the periphery of the polished notch, and determining as qualified if no crack exists; (3) taking a patch material from the corresponding portion of a discarded case by using a linear cutting method, trimming the patch material by using the grinding wheel according to the shape of the notch so that the trimmed patch is matched with the notch; (4) placing the trimmed patch in the notch, supporting the patch with a support frame, firstly performing positioning welding on the patch by using low current argon arc welding, and then performing sectional symmetry welding; (5) performing dyeing inspection on the welding portion, and determining as qualified if no crack or eyehole exists; and (6) eliminating welding stress by ultrasonic waves. The repairing method provided by the invention has the advantages of low equipment investment, low repairing expense and short repairing period.

Description

technical field [0001] The invention relates to repairing metal components by means of welding, in particular to a method for repairing cracked shunt rings of a casing of a certain type of engine. Background technique [0002] During the operation of the engine of a certain type of engine, cracks and large area of ​​block failures will be encountered on the upper surface of the shunt ring of the casing and the lip of the shunt ring. If the engine is not found and repaired in time, the engine may cause major accidents such as engine surge when the engine is working in the field , seriously endangering the safety of the engine. For the shunt ring made of titanium alloy material, the conventional repair method is to carry out repair welding in a special vacuum furnace, and use a special fixture to carry out heat treatment in a heat treatment furnace after welding. The disadvantage of this conventional repair method is that the equipment capital investment is large, the repair ...

Claims

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Application Information

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IPC IPC(8): B23P6/00B23K9/28B23K9/16C21D9/50
Inventor 刘渊赵健宋扬王虎威王惠林
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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