Komatsu Corporation

Komatsu Industries Corporation

Komatsu Industrial Corp.

Seiji Seki

Kazuhiko Shiroza

Yukiyoshi Takayama

Hiroaki Honma

Kiyokazu Baba

Yuichi Suzuki

Shouji Watanabe

A rotary ring () formed such that an outer circumference is eccentric with respect to an inner circumference is provided to an outer circumference of an eccentric drum () of an eccentric shaft (). An adjustment ring () formed such that an outer circumference is eccentric with respect to an inner circumference is provided to the outer circumference of the rotary ring (), and a slide () is mounted to the outer circumference of the adjustment ring (). Since the slide () and a slide drive unit () are arranged to be superposed substantially at the same height, a distance between the slide drive unit () and a lower end of the slide () can be reduced and the entire height of a servo press () can be reduced. In addition, since the height position of the slide () can be finely adjusted by rotating the adjustment ring (), a press working can be performed with high accuracy.

Press machine

A die cushion controlling apparatus for controlling an operation of a cushion pad, which comprises a pad drive mechanism for driving to raise or lower the cushion pad while applying an upward energizing force, a load measuring unit for measuring a load generated in the cushion pad, a time detecting unit for detecting a generating time and a vanishing time of the load, and a control unit for controlling the pad drive mechanism so that a load measured value measured by the load measuring unit follows a preset load pattern during a period from when the time detecting unit detects the generating time of the load until when the time detecting unit detects the vanishing time of the load.

Die cushion controlling apparatus and die cushion controlling method

A die cushion device is comprised of die cushion modules which are independently movable and unitized. The individual die cushion modules are provided with a cushion pad, a servomotor, a power transmission mechanism, a power conversion mechanism and a guide member. By configuring in this way, the design of the die cushion is facilitated, a drive mechanism of the die cushion becomes compact, and the number of types of parts used is decreased.

Die cushion device

Growing community of inventors

Ishikawa, Japan

Seiji Seki