FIELD: plastic metal working.
SUBSTANCE: method comprises steps of deforming blank at pressing out windows or deep recesses and ribs and simultaneously expanding bridges and rim; then simultaneously flattening stems of two blanks and finally expanding bridges and rim while sizing them.
EFFECT: less consumption of material, enhanced efficiency, enlarged manufacturing possibilities.
3 dwg
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Authors
Dates
2004-09-20—Published
2002-03-04—Filed