Positioning ultrasonic testing device and method for curved surface welded parts

Abstract

The invention relates to a positioning ultrasonic testing device and a positioning ultrasonic testing method for a curved welding component and belongs to the field of ultrasonic testing. An ultrasonic probe of a testing device is connected with an ultrasonic testing module; the ultrasonic testing module is connected with an industrial computer through a PCI bus; a multi-connecting rod mechanical arm is connected with the ultrasonic probe; the ultrasonic probe can realize the test for different spatial positions and postures; five angle sensors on the multi-connecting rod mechanical arm are used for converting the angle change of each connecting rod in the multi-connecting rod mechanical arm into an electric signal and feeding back to a data collecting card; the electric signal is inputted to the industrial computer through a USB connecting line. The testing method comprises the following steps: treating a workpiece surface, arranging the position of a multi-connecting rod mechanical arm base and scanning the workpiece surface. The problem of difficulty in realizing the quantitative ultrasonic testing of the complex surface of the ultrasonic probe driven by a mechanical mechanism is solved. The high-precision online quantitative scanning is performed on an internal defect of the workpiece and the computer is used for fitting and forming numerical value and feeding back the image.

Description

Technical field [0001] The invention relates to the field of ultrasonic testing, in particular to a positioning ultrasonic detection device and method of curved surface welding parts, in particular to a positioning ultrasonic detection device and method of curved surface welding parts based on a series-parallel hybrid mechanism. Background technique [0002] In quantitative ultrasonic testing, a mechanical mechanism is often used to drive the ultrasonic probe. Through the control of the mechanical mechanism, the ultrasonic probe reaches a specific position and scans in a specific area. At each scan point, the position information is fed back by the mechanical mechanism, the internal state of the workpiece is fed back by the ultrasonic probe, and then the computer fitting is used to obtain the defect information inside the workpiece. However, if the surface curvature of the tested workpiece changes greatly, the design of the mechanical mechanism will also be very complicated, and ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a positioning ultrasonic detection device and method for curved surface welded parts, which solves the problem that the mechanical mechanism driving the ultrasonic probe in the prior art is difficult to realize the quantitative ultrasonic detection of complex curved surface parts, and at the same time performs high-precision detection of internal defects of the workpiece. On-line quantitative scanning, and form numerical and image feedback through computer fitting

Images