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Simple method for eliminating internal stress of casting sandbox

An internal stress and sand box technology, applied in manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems affecting the gap between the upper and lower sand boxes, residual internal stress, and wall warping, etc., to eliminate residual internal stress, easy to Mastery, low-cost effects

Inactive Publication Date: 2018-06-08
JIANGYIN XINCHANG MACHINERY PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fan is the main component of wind power generation, including the hub and the base, etc. The size of the hub and the base is large, and the size of the casting sand box is also large. After the welding of this type of casting sand box, there is residual internal stress in the wall plate, which causes the wall plate to be damaged. Upturning affects the gap between the joint surfaces of the upper and lower sand boxes, so heat treatment is required to eliminate internal stress. Usually heat treatment is carried out in a heat treatment plant using special heat treatment equipment, and the cost is relatively high

Method used

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Embodiment Construction

[0009] The present invention is a simple method for eliminating the internal stress of the casting sand box, which is carried out according to the following steps:

[0010] S1: Divide each wall plate of the casting flask into several sections symmetrical along the center line;

[0011] S2: Use two sets of heat guns to heat one of the wall panels from the center line to both sides at the same time, the heating temperature is controlled at 600-650 ° C, and the heating time is 8-10 hours;

[0012] S3: measure the tilting angle of the upper surface of the wallboard;

[0013] S4: If the tilting angle of the upper surface of the panel meets the accuracy requirements, start to process another panel according to S2, and if it does not meet the requirements, repeat the heating of the panel. The heating sequence is also to heat from the center line to both sides at the same time. The heating time is 2h.

[0014] The method provided by the invention can eliminate the residual internal ...

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Abstract

The invention discloses a simple method for eliminating internal stress of a casting sandbox. The simple method can eliminate residual internal stress of a wall plate with the upwarping angle being smaller than 3%, is easy to operate and control and low in cost.

Description

technical field [0001] The invention relates to the technical field of fan casting castings, in particular to a simple method for eliminating the internal stress of a casting sand box. Background technique [0002] The fan is the main component of wind power generation, including the hub and the base, etc. The size of the hub and the base is large, and the size of the casting sand box is also large. After the welding of this type of casting sand box, there is residual internal stress in the wall plate, which causes the wall plate to be damaged. Upturning affects the gap between the joint surfaces of the upper and lower sand boxes. Therefore, heat treatment is required to eliminate internal stress. Usually, heat treatment is carried out in a heat treatment plant using special heat treatment equipment, and the cost is relatively high. Contents of the invention [0003] In order to overcome above-mentioned deficiency, the present invention provides a kind of simple and easy m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D9/50
CPCC21D9/0081C21D9/50
Inventor 张一斌
Owner JIANGYIN XINCHANG MACHINERY PARTS