SECTION BENDING MILL STAND Russian patent published in 2008 - IPC B21D5/06 

FIELD: plastic working of metals, possibly production of bent sections.

SUBSTANCE: stand includes mounted in chocks upper and lower calibrated rolls. Said chocks are arranged in housings having horizontal traverse bars, four guiding struts with diameter d and compression springs. Guiding struts pass through vertical openings of chocks. Compression springs are arranged in struts between upper chocks and horizontal traverse bars of housing. Guiding struts are provided with barrel like portion arranged symmetrically relative to horizontal axis of upper roll and having circular generatrix. Radius R of said generatrix is determined by expression R = 0.5(L + D) where L -distance between centers of chock cross sections along horizontal line. Maximum diameter D of barrel like portion of struts is determined by expression Length of barrel like portion is equal to 1.2 d.

EFFECT: improved quality of bent sections.

2 dwg, 1 ex