FIELD: technological processes.
SUBSTANCE: invention relates to metal forming, particularly, to production of pipes with open seam from metal sheets. Sheet of metal having bending edges on its longitudinal sides is fed to pipe forming press, in which pipe with open seam is made of said sheet by means of upper tool. At that, bending sections following in direction from outside to outside beyond folding edges are deformed using pilger sequence of bending operations with deviation from consecutive increase of section numbers.
EFFECT: disclosed is a method of making pipes with open seam from metal sheets.
3 cl, 5 dwg
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