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Device for judging collision of a die cushion mechanism and system for judging collision

  • US 20070012083A1
  • Filed: 06/30/2006
  • Published: 01/18/2007
  • Est. Priority Date: 07/04/2005
  • Status: Abandoned Application
First Claim
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1. A device for judging the collision of a slide with a die cushion in a die cushion mechanism which produces a force against the slide in a press machine using a servo motor as a drive source, comprising:

  • force detection means for detecting a force produced between said die cushion and said slide; and

    comparator means for comparing a force detection value detected by said force detection means with a predetermined threshold value;

    wherein, when said force detection value becomes greater than said threshold value, it is so judged that said slide has come into collision with said die cushion.

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