Modeling and experimental study of complex critical condition for ductile-regime micro-grinding of hard brittle material

Abstract

Surface formation mechanism of hard brittle material in micro-grinding is analyzed. The mathematical model of undeformed chip thickness hm in slot micro-grinding is built. A model to describe complex critical condition of ductile-regime in micro-grinding of hard brittle material is proposed considering size effect factor Md and micro-grinding tool topography. Micro-grinding ductile-regime experiments on soda-lime glass and monocrystal silicon are designed and carried out. Influences of micro-grinding parameters to crack length are investigated based on analysis of experiment results. The model this paper proposes is also confirmed, ductile factor ζ0 and ductile-brittle factor ζ1 to soda-lime glass and monocrystal silicon are derived. Some finding would provide research theory and experimental reference to micro-grinding. © 2013 Journal of Mechanical Engineering.