The authors finished a series of
orthogonal turn-milling tool wear experiments on a rebuilt profile modeling machine. The wearing configuration of machining 58SiMn steel in turn-milling is rake face
wears, flank face wears and minor flank face wears. Configuration of wear and mechanism of orthogonal turn-milling tool in orthogonal turn-milling high strength steel were studied. Compared to normal turning and milling, minor flank face wears are even more severe. Additionally, as the minor flank face wears influence on the machined surface quality, its quantity is defined as the standard of tool life in turn-milling. Mechanism of tool wearing in turn-milling is
fatigue-exfoliative wearing,
felted wearing in lower cutting speed, and
diffuse wearing in higher cutting speed, accompanied with abrasive wearing. Under different cutting conditions the mechanism of turn-
Milling tool is different, the degree that cutting speed influences on the turn-milling tool wearing is the greatest. Fatigue-exfoliative wearing, felted wearing and abrasive wearing go along almost all the time, while diffuse wearing enters on the leading only when the cutting speed reaches a definite value.