Abstract
An improved tooling for drawing cylindrical and hemispherical cups was designed, fabricated and tested. This tooling makes use of a concertina rubber shroud to keep wet lubricants away from the friction interface. Tests were conducted with aluminium, copper and brass blanks using several lubricants. The punch and the blank-holding forces measured during the tests, and the strain distributions of typical cylindrical and hemispherical cups that were formed, are presented. Inspection of the friction interface after scores of drawing tests indicates that the rubber shroud is effective in preventing the lubricants from reaching it.
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