Circular saw blade stress detection system based on transmission-type magnetoelastic effect

Abstract

The invention discloses a circular saw blade stress detection system based on a transmission-type magnetoelastic effect. The system comprises a probe which is used for detecting the residual stress of a to-be-detected saw blade and the out-of-plane displacement of the to-be-detected saw blade; a driving device which is used for driving the saw blade to be tested; an adjusting device which is used for adjusting the positions and the heights of the two probes; a data collector which is electrically connected with the probe, and used for collecting and processing data detected by the probe. a controller which is used for controlling the driving device and the adjusting device to operate; and an optical flat plate, wherein the driving device and the adjusting device are installed on the optical flat plate. The absolute value of the residual stress of each point of the saw blade matrix to be detected can be obtained through a transmission-type magnetoelastic effect stress detection method, so that the stress uniformity, the overall stress grade and the out-of-plane displacement planeness of the saw blade are judged, and comparison between the residual stress distribution state and the planeness of the saw blades in the same batch is realized.

Description

technical field [0001] The invention relates to the technical field of stress non-destructive testing of components, in particular to a circular saw blade stress testing system based on a transmission magnetoelastic effect. Background technique [0002] Circular saw blades are the most widely used working tools in sawing production, and their dynamic stability directly affects the quality of sawing products, the noise of the sawing process, and the service life of saw blades. One of the most important factors affecting the dynamic stability of the saw blade is the residual stress state of the saw blade matrix. The residual stress of the saw blade matrix is ​​jointly introduced by the heat treatment, tensioning, surface grinding, leveling and other process links in the production process, so the detection of the residual stress of the saw blade matrix before and after the execution of each process can effectively evaluate the execution effect of each process link, And the st...

AI Technical Summary

Problems solved by technology

When the existing lateral displacement detection technology reflects the stress state of the saw blade substrate, the main problem is: for circular saw blades with non-quasi-disc structures, such as circular saw blades with scraping blades, the lateral strain is affected by the stress state and geometric structure. Coupling effect, so the transverse strain cannot represent the stress in principle; the detection efficiency is low and the operator's technical requirements are high

When measuring the lateral displacement of the circle, the uniformity is judged only by the memory and experience of the operator, and the saw blade is rotated and transposed manually, which is inefficient; the accuracy is low and only relative values ​​can be measured

Measuring the lateral displacement on the circumference of the saw blade with a dial indicator can only roughly reflect the stress uniformity in the circumferential direction of the substrate, and cannot repeatedly locate the abnormal position

And each measurement can only measure the relative value of the lateral displacement of the same saw blade, and the lateral evaluation of the stress state cannot be carried out between different saw blades of the same model

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