Multi-angle fillet weld residual stress test centering device

Abstract

The present invention discloses a multi-angle fillet weld residual stress test centring device. The device comprises a vertical level adjustment mechanism, a vertical transmission mechanism, a transverse level adjustment mechanism and an angle rotation adjustment mechanism. The vertical level adjustment mechanism drives motion of a vertical movement platform through a screw and a screw nut; the vertical transmission mechanism is connected with the vertical movement platform, and drives the motion of the vertical transmission mechanism through a gear and a rack; the transverse level adjustmentmechanism is connected on an upright movement platform, and drives the motion of a transverse movement platform through a gear and a rack; and the angle rotation adjustment mechanism is connected on the transverse movement platform and drives rotation of a rotary disc through a rotation shaft and a gear, and the rotary disc is provided with a sleeve configured to install an magnifying lens and anindentation generation device. The multi-angle fillet weld residual stress test centring device achieves measurement and location of multi-angle fillet weld residual stress through multi-azimuth finalmotion regulation, is simple to operate, can be used for measurement of engineering field fillet weld, and is high in centring precision, large in adjustment range and small in size.

Description

technical field [0001] The invention relates to a multi-angle fillet weld residual stress test centering device, which can be used in conjunction with an indentation generating device to realize the multi-angle fillet weld residual stress test, and belongs to the field of residual stress test equipment. Background technique [0002] The impact indentation method has become a new type of residual stress testing technology in engineering applications in recent years and has been paid more and more attention. This testing technology belongs to the stress superposition method in theory. The generated material rheology will cause the relaxation deformation of the stressed material. At the same time, the elastic-plastic zone generated by the indentation itself and the stress-strain field around it will also change correspondingly under the action of residual stress. The strain change generated by the superposition of behaviors can be called the superimposed strain increment, and t...

AI Technical Summary

Problems solved by technology

For making indentations at the center of the strain grating axis, there is a high requirement for centering accuracy. For the residual stress test of fillet welds on the engineering site, the centering accuracy of the traditional impact indentation measurement device is poor and the device is difficult to tilt and fix. In this case, the measurement error for the residual stress of the fillet weld is relatively large, and it cannot even be measured for the small angle fillet weld

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