FIELD: plastic metal working, namely manufacture of elongated hollow-shaped parts.
SUBSTANCE: method comprises steps of forming flat blank of wire pieces in the form of tensioned helices; coiling blank to coil; placing blank coil in press-mold for pressing it by several transitions; at each transition performing pressing at least in three directions normal relative to symmetry axis of blank. After making part in the form of body of revolution, it is pressed in each next transition except last one at effort exceeding pressing effort of previous transition. After each transition blank being body of revolution with three protrusions on outer surface is formed. At next transitions beginning from second one, said protrusions are removed. In order to make part in the form of polygon, at first blank in the form body of revolution having three protrusions in outer surface is formed. At last transition part in the form of polygon is formed. Method is realized with use of press-mold having casing with rod mounted in it and punches movable in direction normal relative to rod symmetry axis. Contour of working end of each punch depends upon part to be made.
EFFECT: enlarged assortment of made parts, enhanced efficiency of method.
6 cl, 4 dwg, 1 ex
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