Blind hole method residual stress automatic drilling testing device

A residual stress and testing device technology, applied in the direction of boring/drilling, feeding device, positioning device, etc., can solve the problems of inconvenient adjustment of drilling height, slow development of testing equipment, inconvenient measurement, etc.
CN113245585AInactive Publication Date: 2021-08-13BEIHANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2021-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a blind hole method residual stress automatic drilling testing device. The device comprises a drilling system, a clamping system, a positioning system and an automatic testing system; the drilling system can be used for drilling any plane of a test sample piece; the clamping system is used for clamping in a pushing and pressing manner, so that the clamping stress can be reduced to the greatest extent, and the measurement error is reduced; the positioning system can automatically identify the position of a strain gauge and calculate the coordinates of a drilling position; and the automatic testing system performs automatic tool setting and automatic drilling according to the position of the strain gauge identified by an image, and after drilling is finished, software calculates the residual stress of different depths and surface layers of the sample piece according to a strain value after feeding each time and the actual drilling hole diameter measured by the image identification.
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Description

technical field

[0001] The patent of the present invention relates to an automatic drilling test device for blind hole method residual stress, which includes a drilling system, a clamping system, a positioning system and an automatic testing system. The device can realize automatic tool setting, automatic drilling and automatic correction of measurement errors function. Background technique

[0002] Residual stress is the stress that exists when an object maintains internal balance when there is no external force. In mechanical manufacturing processes, such as casting, cutting, welding, heat treatment and assembly, different degrees of residual stress will appear. Residual stress will affect the processing deformation, fatigue life and structural strength of materials. With the development of material science, the requirements for residual stress of materials are getting higher and higher. At present, the test methods of residual stress are divided into two categories: non-...

Claims

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