FIELD: metallurgy industry.
SUBSTANCE: invention refers to metal deformation process, and namely to shaped tube manufacturing. Profiled mandrel is made in the form of specified screw profile and has coiler rolls made in the form of rolling elements, which are arranged at an angle to axis of tube workpiece, which is equal to the specified angle of spiral. At that, profiled mandrel is rigidly fixed on the pin in axial direction, which has the possibility of free rotation about its longitudinal axis, and coiler rolls are installed on axes which are arranged in the spindle mounted on roller bearings with the possibility of its free turning about tube axis.
EFFECT: tube accuracy is improved and manufacturing capabilities are enlarged.
3 cl, 3 dwg
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