Mori Seiki Co., Ltd.

Hiroshi Hashimoto

Hiroshi Yasuda

Tsutomu Tokuma

Hiroyuki Tsuchiya

A machine tool has a pair of guide rails and a pair of upper and lower ball screws. No forces are transferred between a beam of a double column frame and a movable unit. The guide rails are spaced from each other and disposed on a bed, and the movable unit is horizontally movably supported on the guide rails. The upper and lower ball screws are mounted respectively on upper and lower portions of the double column frame for moving the movable unit horizontally. Even when the beam is deformed by flexing downwardly by gravity, the movable unit moves stably and smoothly at a high speed to machine a workpiece highly accurately without being adversely affected by the deformation of the beam.

Machine tool

To provide a machine tool in which a workpiece can be delivered to/from a first and a second spindle headstock without any increase in front/back direction dimension of a machine main body. A second spindle headstockis capable of moving to a position for workpiece delivery to/from a first spindle headstockso as to be close to or to abut on the first spindle headstockWhen the second spindle headstockis positioned at the workpiece delivery position, a tool postis positioned right under the first spindle headstockso that its cutting point 'c' is positioned vertically under an axis 'a' of the first and second spindle headstocks

Growing community of inventors

Nara, Japan

Hiroshi Hashimoto