Research on TA2 dry/wet milling force–vibration characteristics and vibration prediction model

Abstract

To investigate the practical problems such as large cutting force, strong vibration and difficult to control the surface machining quality during TA2 milling process, a dry/wet milling force and milling vibration signal acquisition system was set up, and a three-factor, four-level analytical causality test program was designed to carry out the milling test on TA2, and milling force and milling vibration signals were collected in the process of the test. Force and vibration characteristics under dry and wet milling conditions were extracted and comparatively analyzed, to investigate the influence of dry and wet milling on the cutting performance of TA2. The Spearman correlation coefficients of the milling force and milling vibration signals were calculated to study the correlation between the two signals; the milling process parameters and milling force were used as the continuous input factors to establish the multivariate regression prediction model of milling vibration, and the coupling relationship between the three was further investigated. The results show that: (1) there is a strong correlation between the milling force and vibration signals; (2) the TA2 can obtain better milling performance when the feed rate is v_f = 8, 10 mm/min for dry milling and v_f = 12, 14 mm/min for wet milling; (3) Under dry and wet working conditions, the correlation coefficient R value of the milling vibration prediction model based on the combination of three-way milling force is 0.9184 and 0.9665, respectively, which is higher than that of the prediction model of the combination of the milling process parameters, indicating that the use of the milling force signals can be used to predict the milling vibration in a better way, and the research can provide theoretical references for the actual machining and non-contact measurement of milling vibration in TA2.