FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to forming of round steel pipe of sheet material and to forming machine. Unit is used to spin the train of dies along endless path that have forming passes directed outward and turning at reduction step during early forming stage. Note here that forming pass of every die retains the edge of the workpiece for die turn and position change through preset angle and bending.
EFFECT: higher accuracy of sizes.
12 cl, 10 dwg, 5 ex
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