Komatsu Corporation

Komatsu Industries Corporation

Takeo Arikabe

Hiroyuki Ito

Hirohide Sato

Takuji Miyasaka

Shigeo Morimoto

Eiji Doba

Masaya Nakagawa

Shyoji Watanabe

Shigenori Nagashima

Ryota Yoshimura

A die cushion device includes a cushion pad, a support section, a servomotor, and a shock absorber device. The support section supports the cushion pad. The servomotor raises and lowers the support section for raising and lowering the cushion pad. The shock absorber device includes a damping section and relieves shock between the cushion pad and the support section. The damping section generates reaction force in accordance with the relative speed of the cushion pad with respect to the support section.

Die cushion device

In the die cushion device, a shock absorber device relieves shock between a cushion pad and a support section. The shock absorber device includes a damping section and an elastic section. The damping section generates reaction force in accordance with the relative speed of the cushion pad with respect to the support section. The elastic section generates reaction force in accordance with the relative displacement of the cushion pad with respect to the support section. The controller section controls a servomotor so that a speed difference between the speed of the slide member and the speed of the support section is set to be a predetermined target speed difference value that changes over time.

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Hiratsuka, Japan

Takeo Arikabe