Method of producing seamless steel tube by using mandrel mill

Details Method of producing seamless steel tube by using mandrel mill Method of producing seamless steel tube by using mandrel mill

1994-04-22

1996-05-07

Larson, Lowell A.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

72370, B21B 1704

Patent

active

055135110

ABSTRACT:
A mandrel mill for rolling seamless steel tubes includes a plurality of roll stands each having a pair of rolls defining a roll groove therebetween, an axis of the rolls of each roll stand being orthogonal to the axis of the rolls of the adjacent roll stands. The mandrel mill further includes a mandrel bar disposed in the roll grooves configured by the roll stands. The ratio between the radius of curvature of a groove bottom of the groove and a distance between the groove bottom of the roll groove of the first stand ranges from 0.46 to 0.54, and that of the second stand ranges from 0.48 to 0.52.

REFERENCES:
patent: 1858990 (1932-05-01), Foren
Lankford, Jr., et al., "The Making, Shaping and Treating of Steel", 1985, 10th Edition Association of Iron and Steel Engineers, pp. 1044-1047.
Neumann et al., "Stahlrohrherstellung", 1970, 3rd Edition, Deutscher Verlag Fur Grundstoffindustrie, pp. 162-183.

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