CHANNELED SHEET Russian patent published in 1998 - IPC

FIELD: plastic metal working, manufacture of channeled sheet by process of cold stamping. SUBSTANCE: channeled sheet is made from steel having thickness 0.5-1.0 mm with σ_b≤ 400 MPa and corrugation equally distant one from another. Their cross-section is made of arcs of matching circumferences. Flat unidirectional shoulders are made in sheets that are normal to longitudinal axes of corrugations, are inclined at an angle of 60-85 deg to horizontal line and have variable in value in plane of shoulder which minimal value is , where S is thickness of channeled sheet; δ₅ is value of relative elongation of steel. Radii of roundings of shoulders are R = (0.5+0.8) (S+h) and arcs of corrugations have equal radii. EFFECT: increased productivity of process. 2 cl, 5 dwg