Abstract: A press system includes a press portion and a controller configured to control the press portion. The controller includes a load pattern generator, an evaluation input unit, and an optimum load pattern setting unit configured to set an optimum load pattern based on a plurality of evaluations of the quality input by the evaluation input unit. The optimum load pattern setting unit includes a response surface generator configured to create from evaluation value data based on the plurality of load patterns and the plurality of evaluations of the quality, by using as an objective function, the evaluation value data with the load pattern being defined as a design variable, a response surface of the objective function, and an optimization calculator configured to find an optimum solution of the objective function of the response surface by optimization.

Abstract: A press system includes a press portion and a controller configured to control the press portion. The controller includes a load pattern generator, an evaluation input unit, and an optimum load pattern setting unit configured to set an optimum load pattern based on a plurality of evaluations of the quality input by the evaluation input unit. The optimum load pattern setting unit includes a response surface generator configured to create from evaluation value data based on the plurality of load patterns and the plurality of evaluations of the quality, by using as an objective function, the evaluation value data with the load pattern being defined as a design variable, a response surface of the objective function, and an optimization calculator configured to find an optimum solution of the objective function of the response surface by optimization.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.