Mori Seiki Co., Ltd.

Mori Seiko Co., Ltd.

Kazuhiko Matsumoto

Tsutomu Tokuma

Yukinaga Sasazawa

Masamitsu Nakaminami

Takeshi Otawa

Masaru Horikawa

Keizo Kashihara

A permanent magnet synchronous motor is of a rotating magnetic field type, and includes a stator which generates a rotating magnetic field, and a rotor having fixed magnetic poles. The rotor includes first and second rotor units arranged axially thereof. The first and second rotor units each have a rotor core, and permanent magnet pieces bonded on the outer peripheral surface of the rotor core. The rotor cores of the first and second rotor units are engaged with each other. The rotor cores each have pin insertion holes into which guide pins are inserted to position the rotor units in proper circumferential positional relation with respect to each other when the rotor cores are connected to each other by bolts.

Permanent magnet synchronous motor

To provide a composite lathe enabling the overlapping of movement areas without lowering supporting stiffness of a tool post, and thus realizing enhanced machinability. An XY supporting plane A by which a tool postin is supported to be movable in an X-axis direction is set non-parallel to an XZ supporting plane B by which a third spindleis supported to be movable in the X-axis direction, and an axis of the movement in the X-axis direction of the tool postis set apart in a Y-axis direction from an axis of the movement in the X-axis direction of the third spindle

Composite lathe

To provide a machine tool in which positioning accuracy of a ram is ensured, realizing improved machining accuracy. A cylindrical ramsupporting a spindleis inserted in a ram guide holeformed in a cross slide, the ramhas supported surfacesin a V-shape formed on a lower side of an outer circumferential surface thereof, and the supported surfacesare placed on supporting surfacesin a V-shape formed on an inner circumferential surface of the ram guide holeof the cross slide, so that a Z-axis direction position of the ramis automatically aligned.

Machine tool

To provide a composite lathe enabling downsizing of a machine main body and realizing an enlarged machining area. A cutting point 'c' of a tool postis positioned vertically under a straight line connecting axes 'a' of a first spindle headstockand a second spindle headstockand an X-axis stroke of a cutting point of a third spindleoverlaps an X-axis stroke of the tool postby a half or more of the X-axis stroke of the tool post

A spindle device for machine tools that can eliminate the need for laborious air bleeding work and labor-demanding fitting/removing work for maintenance. The spindle device for machine tools includes a drawbar that is axially movably inserted into an axial hole of a tool spindle body. The drawbar serves to bias a tool in a clamping direction. An unclamping cylinder mechanism is provided in a rear of the tool spindle and serves to move the drawbar in an unclamping direction. The unclamping cylinder mechanism has a cylinder block fixed to a rear end wall of the tool spindle body and includes a plurality of bolts. A relay oil passage allows a hydraulic passage in the tool spindle body and a hydraulic passage in the cylinder block to communicate with each other.

Spindle device for machine tools

A tool spindle fixing device of a composite machine tool in which a rotating-tool process is performed by driving a tool spindle into rotation with a rotating tool fitted to the tool spindle rotatably supported to a tool headstock, or in which turning process is performed by driving a work into turning with the tool spindle fixed to the tool headstock and with a turning tool fitted to the tool spindle, characterized in that: a fixed-side coupling having numerous engaging teeth is fixed to the tool headstock, a rotating-side coupling having numerous engaging teeth is fixed to the tool spindle so that the rotating-side coupling is placed within the fixed-side coupling and coaxial with the fixed-side coupling and moreover that the engaging teeth of the two couplings lie in substantially the same plane, and that a connection coupling having numerous engaging teeth is provided on the tool-headstock 12 side so as to be advanceable toward and retreatable from the fixed-side, rotating-side couplings wherein the engaging teeth of the connection coupling 25 are engaged or disengaged with the engaging teeth of both fixed-side and rotating-side couplings by which the tool spindle is fixed or unfixed to the tool headstock.

Growing community of inventors

Yamatokoriyama, Japan

Kazuhiko Matsumoto