FIELD: manufacturing technology.
SUBSTANCE: invention relates to metal forming and can be used in production of hollow parts from pipe, in particular for clamping beams. Tube billet is heated and forged at a rate not exceeding 0.1 m/s. In the process of forming bending is performed with bending in specified direction, then tube billet is upset along preset contour of cross section of semi-finished product with formation of process ledges on surface of semi-finished product. Surface area of the outer surface of the semi-finished product is not less than the area of the external surface of the tube billet.
EFFECT: higher accuracy of part and eliminates machining.
12 cl, 12 dwg
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