ENGRAVING ELECTRIC DISCHARGE MACHINE

Japanese Patent JP3427172

B2

PROBLEM TO BE SOLVED: To electric discharge machine a work while the efficient jump operation is performed by providing a main shaft head with a small-shaped main shaft which is moved in the direction parallel to the axial direction of the main shaft head, the movement being controllable independently of the main shaft head.
SOLUTION: A small-sized main shaft 25 is provided movably in the direction of an axis W parallel to the axis Z in a main shaft head 17, and a rib electrode 31 is fitted to the lower end of the small-sized main shaft 25 through a insulating plate 27 and an electrode holder 29. In performing fine electric discharge machining, the plate and the holder are removed and the small-sized main shaft 25 stored in the main shaft head 17 are projected from the main shaft head 17, and the rib electrode 31 is fitted to the main shaft 25 to be driven in the direction of the axis W, thereby performing fine and deep electric discharge machining for a work 3. The reason for performing such fine electric discharge machining using the small-sized main shaft 25 is that as the main shaft head 17 has large inertia, so it is not suitable for jump operation in the fine electric discharge machining, and the small-sized main shaft 25 having inertia smaller than that of the main shaft head 17 is used to conduct the jump operation for removing machining chips efficiently.

Sakae Kasazaki

JP34660298A

July 14, 2003

November 19, 1998

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Makino Milling Machine Co., Ltd.

B23H7/26; B23H7/30; (IPC1-7): B23H7/30; B23H7/26

JP4331026A
JP5104332A
JP1222819A
JP62292322A
JP788722A
JP5758251B2
JP321595Y1

Koichi Nagata

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