Press device and control method for press device
AssigneeKomatsu Industries Corporation
InventorsYusuke Masato, Takashi Masano
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Abstract
A press device includes a slide, a bolster disposed below the slide, a servomotor configured to drive the slide, a power storage unit, a current detector, and a control unit. An upper die can be mounted on the slide. A lower die can be placed on the bolster. The power storage unit is configured to be able to supply stored power to the servomotor. The current detector detects current supplied from the power storage unit. The control unit performs stop control to stop supply of current from the power storage unit to the servomotor based on a detection value of the current detector.
Claims9
A press device, comprising:
- a slide configured to have an upper die mounted thereon;
- a bolster disposed below the slide, the bolster being configured to have a lower die placed thereon;
- a servomotor configured to drive the slide;
- a power storage unit configured to supply stored power to the servomotor;
- a current detector configured to detect current supplied from the power storage unit;
- and
- a controller configured to perform a stop control to stop supply of the current from the power storage unit to the servomotor when it is determined that an average value of the current supplied from the power storage unit within a specific determination time has exceeded a specific threshold.
A method for controlling a press device, the method comprising:
- detecting a current supplied from a power storage unit to a servomotor configured to drive a slide;
- determining whether an average value of the current supplied from the power storage unit within a specific determination time has exceeded a specific threshold, and
- stopping supply of the current when the average value has exceeded the specific threshold.
Dependencies are inferred from the claim text.