Prediction of thrust force and torque in tapping operations using computer simulation

Abstract

General cutting mechanics approach, successfully used for different machining operations using cutting tool with complex geometry, was here applied for prediction of cutting forces in tapping with machine taps. Basic idea was to exploit data obtained from orthogonal cutting tests and relations for oblique cutting forces to obtain force components on discretized parts cutting edges. Developed simulation program calculates instantaneous positions of tap in hole and un deformed chip area of each engaged tooth. Integration along all engaged teeth provides actual values of torque and thrust force in every simulation step in the whole tapping cycle.