Ultrasonic phased array detection system for transitional circular arc inside cavity

Abstract

The invention relates to an ultrasonic phased array detection system for a transitional circular arc inside a cavity. The system comprises an ultrasonic phased array detector, a detection probe and a positioning device. The system is characterized in that a probe propelling device consisting of an auxiliary operating frame, a balancing weight, a probe clamping block, a fine steel wire and the like is designed. The ultrasonic phased array detection system for the transitional circular arc inside the cavity provided by the invention has the advantages of: 1, ensuring that the centre of curvature of an arc-shaped wafer of the detection probe is concentric with the circular arc detected so that an ultrasonic wave is vertically incident to corner parts of the circular arc detected so as to realize detection with high sensitivity of all parts of the circular arc; 2, ensuring that the probe operates stably in the cavity structure clings to the side wall of the circular arc detected; 3, ensuring coupling of detection by forming a sealed water cavity between the detection wafer of the probe and the circular arc detected through the detection probe and the front and back clamping blocks; and 4, precisely positioning the movement position of the detection probe through the probe positioning device so as to position the defect horizontal position precisely.

Description

technical field [0001] The invention relates to an ultrasonic phased array detection system for a transitional arc inside a cavity, and belongs to the technical field of non-destructive detection. Background technique [0002] Non-destructive testing technology is an effective method for defect detection and quality control of workpieces, and is widely used in modern industries, especially in aerospace and other fields. With the development of the industrial level, the requirements for non-destructive testing are also constantly increasing, not only requiring comprehensive testing of all parts of the workpiece, but also putting forward higher requirements for the ability to judge the nature of defects and the positioning and quantitative accuracy of abnormal signals. The transitional arc part in the narrow space inside the complex structure is a relatively complex structural form. When using conventional ultrasonic testing methods to detect its internal defects, there are th...

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Problems solved by technology

The transitional arc part in the narrow space inside the complex structure is a relatively complex structural form. When using conventional ultrasonic testing methods to detect its internal defects, there are the following difficulties: 1) The curvature of the transitional arc part is small, and the open space Narrow, the selection and movement space of the detection probe is limited, it is impossible to guarantee the comprehensive detection of all angles of the arc part, and the detection blind area is large; The arc surface is vertical, which affects the detection sensitivity; 3) The defects in the arc part may be distributed along the surface, and it is difficult to give the precise size of the defect along the arc direction when evaluating its size

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