METHOD OF MACHINING INCLINED HOLE WITH NC LATHE, NC LATHE FOR MACHINING INCLINED HOLE, AND CHUCK FOR MACHINING INCLINED HOLE USABLE IN NC LATHE

摘要

PROBLEM TO BE SOLVED: To provide a method of machining an inclined hole with an NC lathe, an NC lathe for machining an inclined hole, and a chuck for machining an inclined hole usable in an NC lathe capable of machining an inclined hole in a subject part to be machined by installing a boring tool on a tool rest in such a way that its hole boring direction is perpendicular to make a product.;SOLUTION: A chuck including a collet chuck 30 having a cylindrical grasping surface 42 similar to an inclination angle to the inclined hole 5 to be formed in the product 1 is installed on a back surface main shaft 13, the part 28 to be machined in a rod-shaped workpiece 19 fed from a main shaft 8 is inclined for the above inclination angle, and it is received by the grasping surface 42 of the chuck. After the part 28 to be machined is cut off the rod-shaped workpiece 19, the part 28 to be machined is rotated by the back surface main shaft 13 with the chuck, while it is moved in the hole boring direction toward the hole boring tool installed on the tool rest 16 in such a way that the bole boring direction is perpendicular, thereby the inclined hole 5 is formed in the part 28 to be machined.;COPYRIGHT: (C)2002,JPO