Slip Line Field of Adiabatic Shear Band in Cutting Process

doi:10.3901/JME.2022.07.284

Abstract

Abstract: According to the slip line field theory, a slip line field model with four boundaries and five zones is proposed for the plastic deformation in the adiabatic shear band formed in the cutting process, and the corresponding velocity vector diagram is given. The boundary of slip line field of adiabatic shear band is defined, which includes the friction contact boundary, rigid-plastic boundary, quasi-rigid-plastic boundary and quasi-free boundary. The slip line field of adiabatic shear band is divided into five zones according to different stress boundary conditions, stress variation trend and geometry of slip line field. The geometric parameters of the slip line field model are determined by matrix operator method, and the method to solve the stress distribution in adiabatic shear band is given. The slip line field model of adiabatic shear band is used to calculate the variation of the crack conduction angle caused by adiabatic shear band with the tool rake angle and cutting speed for the orthogonal cutting FV520 (B) stainless steel. The correlation between the crack conduction angle and the machined surface quality is verified by the experiment of the machined surface geometry.

Key words: cutting process, adiabatic shear band, slip line field, crack conduction angle, machined surface quality

CLC Number:

O346
TG501

WANG Minjie, WANG Yang, WEI Zhaocheng, DUAN Chunzheng. Slip Line Field of Adiabatic Shear Band in Cutting Process[J]. Journal of Mechanical Engineering, 2022, 58(7): 284-294.

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