These two terms are not exactly synonymous and in the last decade have been taken and affected by different nuances. The exact meaning of the same is set out below, and which at times complies simply with the usual inflation of terms derived from their commercial use.
High performance machining, a traditional or classical concept
'High performance machining’ traditionally referred to that simultaneously applying great feeds and cutting depths, while maintaining cutting speeds considered conventional. Under these operating conditions, large chips arise as shown in Fig.This process should be carried out on machine tools with very powerful rigid headstocks. it is called High Removal Rate Machining, which is a more specific descriptive term than that understood by the vaguer ‘high performance’. Higher chip thicknesses than usual are generated by applying large feeds and great cutting depths. Cutting forces grow almost in direct proportion to the chipping section. Thus with this hypothesis we approach two kinds of problems: possible catastrophic tool failure ( breakage) due to high cutting forces or edge breakages at multiple points ( chipping).
Therefore, this kind of machining is only applicable to soft materials as in the case of lightweight alloys, low resistance steels or steels prior to hardening through tempering. A typical case is the turning of large crankshafts and casting rollers on large powerful heavy-duty lathes. In this case large tool inserts are used as shown in Fig.
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