Title:
PRESS DEVICE AND METHOD FOR DETECTING OVERLAPPING OF WORKPIECES
Document Type and Number:
WIPO Patent Application WO/2019/039315
Kind Code:
A1
Abstract:
Provided is a method for detecting overlapping of workpieces in a press device 1 that presses a workpiece W using dies including an upper die UD and a lower die LD, the method including: a pressing step in which a slide 3 to which the upper die UD is attached is moved up and down above a bolster 2 to which the lower die LD is attached; a load detecting step in which the load applied to the slide 3 is detected; and a determination step in which it is determined that workpieces W overlap when the gradient K of the change in the load, detected in the load detecting step while the slide 3 is moved down by a press mechanism 6, with respect to the moving distance of the slide 3 or the time elapsed is greater than a reference Ref.
Inventors:
KUSANO SATOSHI (JP)
SAWADA TAKAYUKI (JP)
SAWADA TAKAYUKI (JP)
Application Number:
PCT/JP2018/030031
Publication Date:
February 28, 2019
Filing Date:
August 10, 2018
Export Citation:
Assignee:
NIDEC SHIMPO CORP (JP)
International Classes:
B30B15/28
Foreign References:
| JP2013107098A | 2013-06-06 | |||
| JPH03114700A | 1991-05-15 |
Attorney, Agent or Firm:
KOHO IP LAW (JP)
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