高速切削过程材料变形的应变率研究

doi:10.7527/S1000-6893.2017.21757

Abstract

Abstract: High-speed metal cutting has been widely studied around the world for its high efficiency and quality. However, a quantitative study on many physical parameters of the cutting is still difficult when the cutting speed is high. By investigating the feasibility of studying the strain rate from the perspective of material flow, a method for strain rate calculation is proposed based on mesh measurement. The distribution of strain rate of the metal in the cutting process is obtained, and the data obtained from calculation are compared with those from measurement. The results show that the strain rate on the rake face will be affected by the friction between the chip and the tool. The nearer the distance between the chip layer and the tool rake face, the greater the strain rate will be. The strain rate in the central shear plane is much larger than that in other areas along the shear plane direction, with the strain rate in the two ends being the greatest. The quantitative study physical parameters of high-speed cutting can thus be obtained by using this method from the perspective of material flow.

Key words: high speed machining, flow stress, strain, strain rate, flow

CLC Number:

V252

ZHANG Keguo, LIU Yong, WANG Yan'gang. Strain rate on material deformation in high speed metal cutting process[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(3): 421757-421757.

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Strain rate on material deformation in high speed metal cutting process

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