METHOD FOR MAKING SHAPED-CONTOUR PARTS AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2006 - IPC B21K1/00 B21J5/12 B21J13/02 

FIELD: plastic working of metals, possibly manufacture of parts with shaped contour, for example polyhedral parts.

SUBSTANCE: method comprises steps of forming round cross section semi-finished product; embossing its surface for forming relief in the form of alternating protrusions and recesses and shaping curvilinear contour of said relief. Size of shaped contour corresponds to size of profile of ready part. Diameter of described circle passing through apexes of curvilinear protrusions is selected in range consisting of (1.15 - 1.35) of diameter of inscribed circle passing through apexes of recesses of part. Curvilinear contour of protrusions and recesses is shaped due to acting upon semi-finished product by means of shaping tool having profile of working surface in the form of curvilinear protrusions. The last have curvature radius with curvature centers spaced from part symmetry center by distance exceeding by 1.65-1.8 times distance from said symmetry center till curvature centers of curvilinear protrusions of part. Curvilinear recesses are alternated with curvilinear protrusions on working surface of shaping tool. Diameter of described circle passing through apexes of said recesses consists (1.15 - 1.35) of diameter of inscribed circle passing through apexes of curvilinear protrusions.

EFFECT: enlarged manufacturing possibilities of method and apparatus.

8 cl, 8 dwg