FIELD: technological processes.
SUBSTANCE: inventions of the group relate to the field of forging and pressing equipment and can be used, in particular, for manufacturing of forged products with variable section along length, bent and twisted in space. Workpiece of shaped tube is pre-rolled from two opposite sides along entire length to produce decorative extrusions of specified configuration on two opposite rolled sides of workpieces. Pipe is cut to measuring billets, each of which is laid in receiving cavity of bending tool, formed by rear sides in unfolded state of fixed and pressing mandrels so that blank with non-rolled sides touched back sides of mandrels. It is bent in one rotation of the disc without stops until the end of the bending process. In open state rear sides of fixed and pressure holders form receiving cavity, and pressing mandrel has locking plane and holes for attachment of additional mandrels by means of pin. At that, on each additional mandrel there is a plane mating to locking plane of pressure mandrel.
EFFECT: higher quality of rolled workpieces and broader technological capabilities of the method.
2 cl, 2 dwg
