关键词: 超声波, 在机测量, 等壁厚, 刀路调整, 补偿加工

Abstract: For complex curved surface parts in aerospace,traditional processing methods are difficult to precisely control the wall thickness of complex curved surfaces,resulting in a large deviation of the wall thickness after processing. At the same time,manual measurement of the wall thickness affects the processing efficiency of the products. The equal wall thickness processing of the reduction groove of the spacecraft cover plate was studied,and an equal wall thickness compensation processing technology based on ultrasonic in-machine measurement was proposed. The aim is to obtain error data through ultrasonic in-machine measurement for wall thickness compensation and achieve high-precision equal wall thickness processing of complex curved surface parts. Through the comparative processing verification of the theoretical tool path and the compensated tool path,the wall thickness error changed from 0.671 mm before compensation to 0.027 mm after compensation,and the uniformity of the wall thickness was significantly improved. The fluctuation of the wall thickness value after compensation processing within ±0.12 mm of the target value improves the processing accuracy. Meanwhile,the in-machine ultrasonic measurement of the wall thickness avoids the cumbersome repetitive clamping and manual measurement,thereby enhancing the processing efficiency.

Key words: ultrasonic wave, in-machine measurement, equal wall thickness, knife path adjustment, compensation processing