FIELD: metallurgy.
SUBSTANCE: stock is exposed to closed deposition in a matrix channel and double-sided extrusion. Extrusion is carried out into upper and lower wedge cavities formed by upper and lower wedge puncheons. Then the specified puncheons are extracted from the matrix channel and turned around the axis by the angle 180°. By means of these puncheons they perform the subsequent loading of the stock with filling of the upper and lower wedge cavities at the other side. The cycle is repeated, afterwards wedge puncheons are replaced to puncheons with an end surface arranged perpendicularly to the axis of the stock. Closed deposition is carried out giving initial shape to the stock. Wedge puncheons and matrix channel have round or rectangular shape.
EFFECT: invention excludes formation of cracks, cavities, folds and clamps in a stock and provides for higher resistance and operability of a device.
3 cl, 7 dwg
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