DIE CUSHION FORCE CONTROL METHOD AND DIE CUSHION DEVICE

摘要

There are provided a die cushion force control method and a die cushion device that can improve response delay of die cushion force without changing die cushion waiting position upward. In the die cushion force control method, a servo motor is driven according to a die cushion force command B previously set and the die cushion force is generated on the cushion pad. The die cushion force control method includes a step of allowing the cushion pad to wait in a predetermined die cushion waiting position at which a die cushion force action will start, and a preliminary pressurization step of outputting the die cushion force command B and preliminary applying pressure to the cushion pad before a slide of a press machine reaches the die cushion waiting position.

主权项

1. A die cushion force control method of driving a servo motor according to a die cushion force command previously set to generate die cushion force on a cushion pad, the method comprising:
a step of allowing the cushion pad to wait in a predetermined die cushion waiting position at which a die cushion force action will start; and a preliminary pressurization step of outputting the die cushion force command, and preliminary applying pressure to the cushion pad before a slide of a press machine reaches the die cushion waiting position.