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A Strain Detection Method for Cylinder Castings

A detection method and casting technology, applied in the direction of measuring force, measuring device, instrument, etc., can solve the problems of cylinder casting measurement, inability to design residual stress relief methods, etc., to achieve the effect of ensuring accuracy

Active Publication Date: 2016-12-07
WUHU YONGDA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, because the residual stress of the cylinder casting is not measured, it is impossible to design a reasonable residual stress elimination method with accurate data support

Method used

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  • A Strain Detection Method for Cylinder Castings

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the strain detection method for a cylinder casting according to the present invention comprises the following steps:

[0023] S1: Grind and polish the measurement surface of the cylinder casting with silicon sandpaper, clean the polished surface with absorbent cotton dipped in alcohol, and dry it;

[0024] S2: welding the resistance strain gauge and the measuring wire, the resistance strain gauge is pasted on the measuring surface of the cylinder casting with an adhesive, the measuring wire is connected to the strain gauge, and the measuring wire is fixed with plastic glue;

[0025] S3: Dissect the measurement surface of the cylinder casting by using a saw machine, and remove the strain gauge after dissection, wherein cooling water is sprinkled on the saw machine;

[0026] S4: The strain gauge measures the strain chan...

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Abstract

The invention discloses a strain detection method for cylinder castings. The strain detection method is applied to the field of cylinder castings for the first time, and the residual stress of specific cylinder castings is measured, so that a reasonable residual stress can be designed through accurate data support. The elimination method provides data support for subsequent research and production practice, and also guarantees the quality of cylinder castings to a certain extent. At the same time, the cooling treatment of the saw machine, the selection of the resistance strain gauge and the adhesive also ensure the accuracy of the detection data of the residual stress to a certain extent.

Description

technical field [0001] The invention relates to the technical field of cylinder casting, in particular to a strain detection method for cylinder castings. Background technique [0002] During the solidification and cooling process of castings, casting stress will inevitably be generated due to factors such as the difference in cooling rate of each part, the resistance of shrinkage, and the volume change caused by structural transformation. If casting stresses are not relieved, they will remain in the casting as residual stresses. The greater the residual stress in the casting, the parts will be deformed during placement, operation, processing and use, and cracking will occur when the dimensional accuracy is seriously reduced. [0003] The measurement technology of residual stress began in the 1930s, and dozens of measurement methods have been developed so far. At present, the traditional measurement methods of residual stress are mainly divided into two categories. (1) Mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22
Inventor 马羽荣
Owner WUHU YONGDA TECH