THE EFFECT OF DIE MATERIALS AND LUBRICATION ON PUNCH STRETCHING AND DRAWING FORCES OF COLD-ROLLED AND ZINC-COATED STEELS

Recent trends in the automotive industry have resulted in an increased use of zinc coated steels. One of the concerns arising from this change is the effect of frictional differences of these coatings on the stamping process. This is particularly true for prototype or soft tool programs which are frequently used to validate both product and tool design. These concerns were addressed by evaluating both punch stretchability and drawing forces using limiting dome height and drawbead simulation tests. A variety of conditions were investigated including test speed, tool material, lubricant, strain state, and coating type. The results of this investigation show that significant interactions occur between zinc coatings, tool materials and lubricants. Speed was significant only for drawing forces.

  • Availability:
  • Supplemental Notes:
    • Presented at the SAE International Congress and Exposition Detroit, Michigan, February 25-March 1, 1985.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Brazier, W G
    • Thompson, R W
  • Publication Date: 1984

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00399071
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 850274, HS-038 592
  • Files: HSL, USDOT
  • Created Date: Aug 31 1985 12:00AM