Ultrasonic excitation thermal wave imaging system and ultrasonic excitation thermal wave detection device

Abstract

The invention relates to an ultrasonic excitation thermal wave imaging system and an ultrasonic excitation thermal wave detection device. The ultrasonic excitation thermal wave detection device comprises a machine frame, an adjusting mechanism, a pressure sensor, an ultrasonic gun, a limiting shaft and a locking part. During detection, a metal workpiece is arranged on the limiting shaft in a sleeving mode; the metal workpiece can rotate relative to the limiting shaft; the limiting shaft is moved to adjust the relative positions of the limiting shaft and the ultrasonic gun; and when a gun headis in contact with the surface of the metal workpiece, the locking part locks the limiting shaft to prevent the limiting shaft from continuing to move. The metal workpiece is rotated to detect whetherdefects such as cracks and the like exist in the metal workpiece or not in an omni-directional mode. A main body and the pressure sensor are arranged at the other end of a spring, so that a pressuremeasured by the pressure sensor is namely a pressure borne by the ultrasonic gun; the compression amount of the spring is adjusted through the pressure measured by the pressure sensor to adjust the pressure on the surface of the gun head and the surface of the metal workpiece; the detection is convenient and rapid; the ultrasonic gun works in a relatively good measuring state; and the purpose of flexibility and controllability is achieved.

Description

Technical field [0001] The invention relates to the technical field of metal defect detection, in particular to an ultrasonic excited thermal wave imaging system and an ultrasonic excited thermal wave detection device. Background technique [0002] Metal is one of the commonly used materials in modern industry, and metal castings are relatively hard. However, in the process of metal casting, welding, heat treatment, machining and the use of metal products, temperature, inclusions, stress, corrosion, external forces and other reasons often cause local permanent damage to metal castings and cause some problems. , Such as cracks. Therefore, the crack detection of metal castings is very important. [0003] The principle of the traditional ultrasonic excited thermal wave detection device is to couple the ultrasonic wave into the metal casting through the probe. The ultrasonic wave is reflected and propagated continuously in the metal casting. When it encounters the interface between t...

AI Technical Summary

Problems solved by technology

However, the traditional ultrasonic excitation thermal wave detection device cannot meet the requirements of the modern industry for convenient, fast, flexible and controllable detection of specimens.

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