FIELD: metal working. SUBSTANCE: method of piecewise shaping of U-shaped section, having lateral different-length members, comprises steps of successively bending up the above mentioned members in each pass with formation of predetermined-radius bending zones; beginning from the first pass bending up a mean member together with bending up of the lateral members and providing successive lowering of bending radius value; after a small lateral member had been bent up by angle 80 degrees, performing its further forming in next passes by applying an effort to an edge of this member in such a way, that to restrict its lateral shift from a profiling axis, when the above mentioned angle value had been achieved, and in next passes. EFFECT: enhanced efficiency. 1 cl, 1 dwg
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Authors
Dates
1995-08-09—Published
1992-08-06—Filed