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METHOD AND DEVICE FOR DEEP DRAWING BLANKS MADE OF SHEET METAL INTO FLANGELESS MOLDED BLANKS
METHOD AND DEVICE FOR DEEP DRAWING BLANKS MADE OF SHEET METAL INTO FLANGELESS MOLDED BLANKS
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机译:将板料深拉深毛坯制成无边模压毛坯的方法和装置
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摘要
A method for deep drawing blanks, which are punched out of sheet metal that is painted or coated with film material, for example made of steel or aluminum, into flangeless molded blanks, wherein the blanks are formed to a crucible-shaped part, with a flangeless cylindrical edge, around a drawing core by means of a drawing bell of a drawing die, and a predetermined spring force is applied to the side of the edge opposite to the drawing bell during the forming of the edge of the blanks by means of a blank holder, characterized in that the spring force applied to the blank holder is spontaneously reduced substantially to zero shortly before the end of the drawing process.
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