STRIP-LIKE STEEL SHAPE Russian patent published in 2002 - IPC

FIELD: plastic metal working, namely, cold deformed rolled shapes. SUBSTANCE: steel shape includes in its opposite surfaces grooves with rounded ribs. Novelty is rectangular cross section of shape and grooves normal relative to its lengthwise axis and also having rectangular cross section. At making shape by cold deformation of strip steel with thickness S =4.3-5.2 mm, carbon content, 0.47-0.65% and manganese content, 0.50-0.85%, spacing between grooves is equal to 13-16S, their width is equal to 2.9-3.5S, depth is equal to 0.10-0.14S. Ribs of grooves are rounded by radius equal to 0.10-0.12S. EFFECT: elimination of flaws at deformation process, good operational properties. 1 dwg, 1 ex