A high-precision weld defect detection device

By using screw transmission assembly and rolling assembly in the weld detection device, the problem of poor coupling between the probe and the workpiece when detecting welds with a certain inclination angle is solved, and high-precision and stable weld defect detection is achieved.

CN113533534BActive Publication Date: 2025-03-21SHANGHAI RAIL TRANSIT MAINTENANCE SUPPORT
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Patent Information

Application Number
CN202111010322.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-08-31
Publication Date
2025-03-21
Estimated Expiration
2041-08-31

AI Technical Summary

Technical Problem

When the existing weld detection device detects welds with a certain inclination angle, the relative position between the ultrasonic probe and the workpiece to be tested cannot be maintained stable, resulting in poor coupling, reduced sound wave intensity and unstable signal.

Method used

A high-precision weld defect detection device is designed, using a screw transmission assembly and a rolling assembly. The spacing between the ultrasonic probes is adjusted through the screw transmission unit, and a roller is automatically attached to the inspected workpiece to ensure the stable coupling pressure between the clamp and the workpiece.

Benefits of technology

When detecting flat plate type and welds with a certain inclination angle, the relative position between the probe and the workpiece is maintained, and the problems of poor coupling and instability of signal are avoided. It is suitable for the detection of various welds and joints.

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Abstract

The present invention relates to a high-precision weld defect detection device, comprising an ultrasonic detection component, a fixed frame, and a screw drive component, a rolling component and a scale component on the fixed frame, wherein the ultrasonic detection component comprises two groups of symmetrically arranged ultrasonic detection units, each group of ultrasonic detection units comprises a clamping block and an ultrasonic probe, and the ultrasonic probe is arranged on the clamping block, the screw drive component comprises two groups of symmetrically arranged screw drive units, the scale component comprises two groups of symmetrically arranged scale units, the two groups of ultrasonic detection units are respectively movably arranged on the two groups of screw drive units and are respectively connected to the two groups of scale units, and the rolling component comprises two groups of symmetrically arranged rolling units, each group of rolling units comprises a roller arranged on the fixed frame, and the lowest point of the roller is located on the same plane as the lower end surface of the clamping block. Compared with the prior art, the present invention can perform precise detection on weld workpieces except for flat-plate butt welds and welds with a certain inclination angle, has a simple structure, is light in weight, and is easy to carry.
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