FIELD: production of hollow parts with flat wide flange from sheet material. SUBSTANCE: method involves pressing peripheral portion of blank; drawing-forming blank central portion. In the process of drawing, press force is increased by braking flange till complete stopping. Area of blank surface drawn into die window is F Fdr= Fr•Sr/So = Fr Fr Sr/So, where Fr is surface area of ready part bowl portion; So is thickness of basic blank determined by ratio recited in Specification; Sr is average thickness of bowl portion of ready part, which may be determined by ratio recited in Specification. Method further involves uniform extension and thinning of predrawn portion of blank to obtain average value of ready part bowl portion thickness. EFFECT: reduced consumption of metal by decreased blank size and increased depth of stamped part. 2 dwg
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Authors
Dates
1996-11-27—Published
1994-01-06—Filed