Ultrasonic automatic detection device for laser welding T-shaped welding seam defects and quantification method

Abstract

The invention discloses an ultrasonic automatic detection device for laser welding T-shaped weld defects and a quantification method. The device comprises a base, a two-dimensional motion table, a height adjusting seat, a special ultrasonic probe group, a laser calibration assembly, a detection table and a water spraying assembly. The two-dimensional motion platform is installed on the base and used for carrying the special ultrasonic probe group and the laser calibration assembly, and the positions of the special ultrasonic probe group and the laser calibration assembly can be adjusted in the X direction and the Y direction through the two-dimensional motion platform; the detection table is fixedly arranged on the base and is used for placing a detected workpiece; and the water spraying assembly supplies water to the special ultrasonic probe group. The quantitative detection method comprises the following steps of: drawing an amplitude-size curve based on a reference block; performing scanning detection; and evaluating a detection signal. According to the device and method, multi-probe-group automatic detection is adopted, the detection efficiency is greatly improved through designed probe arrangement mode and laser marking, and the detection precision of internal defects of a welding seam is improved through high-frequency ultrasonic detection.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to an ultrasonic automatic detection device for laser welding T-shaped weld defects and a quantitative method thereof. Background technique [0002] High-performance titanium alloy double-beam laser welding T-shaped weld is an important aircraft panel structure. Its advantages of high strength, low cost and light weight have been verified in the manufacture of large aircraft such as Airbus, and it has become a development trend in the field of aviation manufacturing in recent years. focus. The double-beam laser welding technology of high-performance titanium alloy is sensitive to the influence of welding parameters, and the microstructure and mechanical properties of welded joints are easily affected by welding parameters. What's more serious is the lack of welding standards and quality judgment basis for double-beam laser welding seams of titanium alloys, especially the lack of...

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Problems solved by technology

[0003] Aiming at the problems of insufficient detection accuracy, insufficient sensitivity, and low detection efficiency in the prior art, the present invention provides an ultrasonic automatic detection device for laser welding T-shaped weld defects and a quantitative method thereof, and realizes double-beam laser welding of T-shaped welds Automatic ultrasonic scanning detection of internal defects, the detection accuracy can reach the equivalent size of 0.1mm flat bottom hole and can quantitatively detect the defects of 0.1-0.4mm equivalent size, which meets the needs of the aviation industry

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