Jtekt Corporation

Toyoda Koki Kabushiki Kaisha

Yoshihiro Arai

Kunimichi Nakashima

Kozo Imanishi

Yoshio Ootsuka

Asami Hara

Koji Toyama

Toshiyuki Mizuno

Yasuo Niino

Nobumitsu Hori

Tetsuro Furuhata

Hidekazu Hirano

Toshiyuki Tsuzuki

Kiyotaka Kinoshita

Mitsuyoshi Taniguchi

Takeshi Nishikayama

A main spindle device includes: a main spindle; a rod accommodated in the main spindle, the rod being capable of moving to an unclamp position in a direction toward the first end, and when the main spindle is holding a tool, being capable of moving to a clamp position in a direction toward a second end; a biasing unit that biases the rod in the direction toward the second end with respect to the main spindle and that biases the rod to the clamp position when a collet is holding the tool; and a biasing force detector that detects a biasing force of the biasing unit which biases the rod in the direction toward the second end after the rod is moved in the direction toward the first end with respect to the main spindle to the unclamp position by force larger than the biasing force of the biasing unit.

Main spindle device of machine tool

Pallet changer for machine tool

Pallet for machine tool

In order to detect accurately a seating of clamped body and a clamping force at a seating, the workpiece supporting device has plural seating mechanisms. Each of the seating mechanismsincludes a load sensing elementreceiving a clamping force or a fixing force. The load sensing elementconsists of a material having a characteristic that said load sensing element is not substantially deformed by an applied load, especially it consists of a composite material dispersing a material having a pressure resistance effect or a magnetic resistance effect in a matrix of an electric insulation ceramics material. An abnormal clamping or fixing of the clamped body and an abnormal overload are detected by detecting an output from plural load sensing elementssupporting the clamped body.

Workpiece supporting device and seating mechanism therefor

A machining system includes a plurality of machine tools, a transfer apparatus configured to move a workpiece and a plurality of chip conveyors. Each of the plurality of chip conveyors includes a feeding device, a discharging opening and at least one of a first opening and a second opening. The first opening communicates with the discharging opening of an adjacent chip conveyor of the plurality of chip conveyors. The second opening receives chips generated by at least one of the plurality of machine tools. The discharging opening is for discharging the chips in the chip conveyor. The feeding device is configured to move the chips in the chip conveyor toward the discharging opening. A total length of the chip conveyors is easily regulated by changing the number of the chip conveyors so that the machining system is easily and quickly reconstructed.

Chip conveyor and machining system using the same

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Kariya, Japan

Yoshihiro Arai