Relation Between Cutting Forces and Tool Damage. (Retroactive Coverage)

Since the work of Taylor on the machinability of materials, research has been intensified to master the evolution of cutting tool damage due to the stresses encountered in automatic production techniques. A methodology based on the evolution of specific cutting forces during machining operations has been developed and applied to both uninterrupted cutting (turning, boring and tapping) and interrupted cutting (milling). The general methodology is explained and a new law for tool life evaluation is defined. In interrupted cutting such as milling the shock created when the tool enters the material produces energy which contributes to tool destruction. A study of the compatibility between the tool and the workpiece which is based on an analysis of stress waves generated when the tool enters the material in an interrupted cut is presented.--AA