Electroplasticity-based cutting force modeling in the turning of W93NiFe tungsten alloy
摘要
Tungsten alloy is a typical hard-to-cut machining material. It has poor heat conductivity, a tiny elastic modulus that makes it difficult to deform, and great strength and hardness. High cutting force in the machining process directly affects the efficiency of cutting and machining and surface quality. It has become a problem that needs to be solved for high quality cutting of tungsten alloy. In response to the unclear mechanism of the electroplasticity effect on cutting force and cutting effect, in this paper, orthogonal tests for electroplasticity-assisted cutting of W93NiFe tungsten alloy were designed. Based on the orthogonal test data, range analysis was used to investigate the degree of influence and the law of influence of pulse voltage, pulse current frequency, cutting speed and feed on cutting force. Based on multiple linear regression analysis, the prediction model of cutting force for electroplasticity-assisted cutting of tungsten alloys was established. The error of the prediction model was tested. The results indicate that the main factors influencing the cutting force Fx of the W93NiFe alloy during electroplastic auxiliary cutting, the cutting resistance Fy and the main cutting force Fz are all the feed rate, followed by the cutting speed, then the pulse voltage, and the influence of the pulse frequency was the least. The prediction model was well fitted and could predict the cutting force with high accuracy within the range of the experimental process parameters. It provided a theoretical basis for high-quality electroplastic auxiliary cutting processing technology of tungsten alloy.