The dynamics of chip formation in machining

摘要

Machining operations such as turning, milling and drilling involve the modification of a workpiece through the removal of material. This removal occurs via a concentrated shear flow generated by a wedge-shaped tool as illustrated in Fig. 1(a). The material that is removed is called the chip. Because the thermoplastic shear flow that generates the chip is dynamic and highly nonlinear, optimization of machining processes by any means other than trial and error (not uncommon in industry today) requires a fundamental understanding of the underlying physics and new models to predict behavior.