In-situ detection system for residual stress, and detection method thereof

Abstract

The invention provides and in-situ detection system for residual stress, and a detection method thereof. The residual detection system for the residual stress comprises an X-ray residual stress analyzer (1) and a workpiece force-applying test stand (2). The X-ray residual stress analyzer (1) is provided with an X-ray emission gun (11); and the X-ray residual stress analyzer (1) carries out the detection for the residual stress at a detection point (P) on a to-be-detected workpiece (10) through the X-ray emission gun (11). The workpiece force-applying test stand (2) comprises a stand frame (21), a workpiece holder (22), a force-applying pressure head (23) and a drive mechanism not shown in the figure, wherein the workpiece holder (22) is fixed on the stand frame (21); the workpiece holder (22) supports the to-be-detected workpiece (10); the drive mechanism is connected with the force-applying pressure head (23) and provides power needed by the force-applying pressure head (23); and the force-applying pressure head (23) applies a force to the to-be-detected workpiece (10). The magnitude of the force applied to the to-be-detected workpiece by the force-applying pressure head (23) can be changed.

Description

technical field [0001] The invention relates to detecting residual stress of metal structural parts, in particular to a residual stress in-situ detection system and a detection method for in-situ detection of metal structural parts. Background technique [0002] Residual stress refers to the stress that still exists inside the material and maintains its own balance after the removal of various external factors that generate stress. Residual stress directly affects the performance of materials, and in industrial applications, it also affects the service life of workpieces. Therefore, residual stress detection is an important testing technology required in engineering and scientific research. At present, the widely used residual stress measurement methods are mainly blind hole method and X-ray diffraction method. Among them, the blind hole method is a destructive test, which can be operated on site, with fast measurement speed and accurate results, and does not require high m...

AI Technical Summary

Problems solved by technology

When it is necessary to measure the residual stress value of the workpiece under different stress states, it is necessary to apply force to the workpiece before measuring its residual stress, which will cause repeated unloading of the workpiece, and it is impossible to ensure that the X-ray residual stress analyzer can always measure the residual stress of the workpiece. Detection at the same point, that is, in-situ detection is not possible

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