Press-forming product manufacturing method and press-forming facility

  • US 9,469,891 B2
  • Filed: 09/25/2012
  • Issued: 10/18/2016
  • Est. Priority Date: 09/30/2011
  • Status: Active Grant
First Claim
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1. A press-forming product manufacturing method of manufacturing a forming product by press-forming a metal sheet using a press-forming tool, comprising:

  • heating the metal sheet to a transformation temperature Ac1 or more;

    cooling the metal sheet to 600°

    C. or lower;

    forming the metal sheet by a cooled forming tool;

    ending the forming process at a martensite transformation start temperature Ms or more;

    taking out the metal sheet from the forming tool after the forming process is ended; and

    cooling the metal sheet having been taken out from the forming tool, externally of the forming tool,wherein the forming process is performed by a mechanical press-forming process or a hydraulic press-forming process having a pressing speed of 100 min/second or more.

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