![]() This scenario is avoided in all practical machining applications. But the tool life could also end prematurely because of excessive chipping or breakage of the cutting edge. Under proper cutting conditions, tool life is reached gradually because of progressive wear, as shown in Fig. 5.5. ![]() Flank wear land width VB b is often used as a tool life criterion because of its influence on workpiece surface roughness and accuracy. Tool wear is often used as an indication of tool life because it is easy to determine quantitatively. It may be defined in terms of critical levels of measurable physical quantities such as cutting power, cutting forces and tool wear. ![]() A tool-life criterion is a measurable indication of the end of tool life. Tool life is the time a tool will cut satisfactorily and is expressed in minutes between tool changes. Davim, in Machining Technology for Composite Materials, 2012 5.6 Tool life ![]()
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