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This paper deals with the cutting mechanism and cutting performance by ball end milling of curved surface. Firstly, the modeling of a cutter and a workpiece with a concave curved surface are carried out using 3D-CAD. Secondly, the chip area is calculated by the interference of the rake surface and the chip volume removed by a single cutting operation. The maximum chip area shows transitional phenomenon, then a new cutting method such as a looped cutter path machining is proposed and the effectiveness of the new method is considered and verified using the evaluation value which is calculated by the multiplication of the chip and the length from Z axis to the gravity of the chip area.

Study on Cutting Mechanism and Cutting Performance of Machining for Curved Surface by Ball End Mill using 3D-CAD