Machinability and Cutting Tools

This lecture covers the concept of machinability, which is the ability of a material to be machined by removing material. It discusses the factors influencing machinability, such as hardness, shear strength, and thermal conductivity. The lecture also delves into the machinability index, tool life, and the influence of intrinsic properties on machinability. Various tool wear mechanisms, including abrasion wear, adhesion wear, and diffusion wear, are explored. Additionally, the choice of cutting tools based on material properties like hardness and toughness is discussed, along with practical considerations for tool selection. Coated tools and their advantages, as well as the use of ceramics and cubic boron nitrides in cutting tools, are also covered.