Device and method for processing screw rotor, and cutting tool

摘要

A method for processing a screw rotor includes a step of rotating a blade holder 2 while shifting the blade holder 2 in X-axis, Y-axis, and Z-axis directions to form a groove on the outer surface of a rotating cylindrical workpiece 1 with a tool 3 using a processing apparatus having a bed 11 ; a C-axis shaft supporter 12 disposed on the bed 11 ; a C-axis shaft 14 held by the C-axis shaft supporter 12 , the C-axis shaft 14 for rotating the cylindrical object 1 ; a column 13 disposed on the bed 11 ; the blade holder 2 rotatably held by the column 13 ; and the tool 3 attached to the blade holder 2.