Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1990-06-28
1992-06-09
Larson, Lowell A.
Metal deforming
With use of control means energized in response to activator...
Metal deforming by use of roller or roller-like tool element
72201, 72203, 72235, 723652, B21B 118, B21B 3700, B21B 1312
Patent
active
051196557
ABSTRACT:
Method and system for high-speed rolling at about 120 to 140 meters per second and more for rolled stock having a round section and a diameter of 5.5 to 6.5/7 mm. or equivalent, the high-speed rolling being carried out with a system comprising at least one rolling assembly (11) and a coil-forming headstock (12), the rolling assembly (11) including a plurality of pairs of rolls with their axes placed alternately at about 90.degree. to each other, the speeds of the pairs of rolls being strictly correlated and controlled, the system being pre-arranged, before arrival of the rolled stock, for a rolling speed between 40 and about 100 meters per second and advantageously between 60 and 80 meters per second, this rolling speed being maintained at least until the leading end of the rolled stock has entered the coil-forming headstock (12), after which in at least one ramp of increase the rolling speed is brought up to 120 to 140 meters per second and kept at that level during the whole period of rolling of that specific section, the speed being reduced to the first starting speed in the transient moment of arrival of the next specific section.
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Iron and Steel Engineer Article Entitled "Posco No. 3 wire rod mill-A state of the art rolling mill for the quality market", Roy et al., Jan. 1991, pp. 35-38.
Danieli & C. Officine Meccaniche SpA
Larson Lowell A.
Schoeffler Thomas C.
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