飞机蒙皮镜像铣加工稳定性分析

doi:10.7527/S1000-6893.2018.22109

Abstract

Abstract: In recent years, the mirror milling technology has been developed for processing large-sized thin floor parts, which is environmentally friendly and efficient, and is growing to replace the traditional chemical milling process. To overcome the problem of chatter in aircraft mirror milling, a method is proposed to prevent the occurrence of chatter by optimizing the cutting parameters. According to the characteristics of mirror milling process, a prediction model is established for predicting stability limit of mirror milling. A modal analysis of skin parts is performed by using the finite element method to analyze the changes of milling stability caused by the changes of the dynamic characteristics of different processing positions of the skin. The dynamic parameters of the workpiece are obtained through experimental measurements, and the chatter stability of different processing positions is obtained. Experiments are carried out using non-contact measurement method to monitor the vibration displacement in processing area on-line. The processing status is identified with time-frequency domain synthesis analysis. The results reveal the stability changes during mirror milling process and the instability mechanism. Effectiveness of the method proposed is validated to be effective, showing great applicability in practice.

Key words: aircraft skin, mirror milling, thin floor part, chatter, milling stability, non-contact measurement

CLC Number:

V261.2

WANG Changrui, KANG Renke, BAO Yan, ZHU Xianglong, DONG Zhigang, GUO Dongming. Stability analysis of aircraft skin mirror milling process[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(11): 422109-422121.

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Stability analysis of aircraft skin mirror milling process

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