FIELD: tool for plastic working of metals. SUBSTANCE: pass system has pairs of grooved rolls positioned in succession and composed by forming members of different diameters and cylindrical-conical flanges, which cover passes. First six pairs of rolls are arranged so that members of smaller-diameter upper rolls are overlapped by flanges of larger-diameter lower rolls. Members of larger-diameter upper rolls in the first four pairs are overlapped by flanges of smaller-diameter lower rolls. Sixth pair has smaller-diameter upper roll with member provided with closure flange. Three terminating pairs of rolls are free of flanges (open passes). As a result strip is reliably retained against offset in transverse directions. Stable entrance of strip front end is provided in the fifth pass and construction of the sixth pass provides precise dimensions of profile. EFFECT: high quality of product by providing precise dimensions of profile. 5 dwg
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Authors
Dates
1994-12-30—Published
1992-07-10—Filed