FIELD: plastic metal working, possibly manufacture of parts such as flanged bolts. SUBSTANCE: method comprises steps of first reduction of rod after cutting off blank; preliminarily upsetting cylindrical head; upsetting flange and shaping hexagon; realizing preliminarily upsetting after first reduction in order to make cylindrical head with diameter whose value is determined according to given relation; making hexagon by preliminarily reducing cylindrical head to hexagon and upsetting it; performing preliminarily reducing after preliminarily upsetting cylindrical head. EFFECT: possibility for making flanged bolts without flash, with lowered size of flange, enhanced strength of tool, improved quality of articles. 1 dwg
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Authors
Dates
2004-01-27—Published
2002-03-15—Filed