FLYING DRUM SHEARS Russian patent published in 1998 - IPC

FIELD: dressing rolled strips, namely, trimming blanks for profiling them. SUBSTANCE: flying drum shears includes drums 1,2 with cutters 3,4 mounted on them. Profiles of edges of cutters are rectilinear ones, edges are inclined from their mean portion to edges by angle α=4-5 deg. Cutters are mounted with mutual overlapping. Maximum value of overlapping is determined according to formula δ = b•tgα-(h/2),, where b - predetermined width of steel strip trimming, h - width of strip to be trimmed. EFFECT: enhanced geometry of bent sections with vertical members. 2 dwg