A DUAL-MECHANISM APPROACH TO THE PREDICTION OF MACHINING FORCES .2. CALIBRATION AND VALIDATION

The Dual-Mechanism Machining Force Model (DMMFM) developed in Part 1 o f this paper is calibrated through a specially developed algorithm, th en validated. The calibration results ave used to study the total mach ining force predictive capabilities of both the traditional lumped she aring model and the DMMFM. It is shown that the Dual-Mechanism Approac h contributes greatly to our ability to both physically explain the tr ends in the machining force data and to understand their implications. This is achieved through an interpretation of the individual rake fac e and clearance face forces that are predicted using the DMMFM. The in terpretation is based on the relations of these rake face and clearanc e face forces to the process inputs resulting from their effects on th e DMMFM coefficients through thermal energy generation and temperature , shear-strain level and shear-strain rate. Some implications of the k nowledge of the individual rake face and clearance face forces, as pre dicted by the DMMFM, are also discussed.