Controlled counter-drafting to reduce crop loss during ingot rol

Details Controlled counter-drafting to reduce crop loss during ingot rol Controlled counter-drafting to reduce crop loss during ingot rol

1983-07-18

1984-11-06

Combs, E. Michael

Metal deforming

By use of roller or roller-like tool-element

Plural roller-couples

72366, B21B 4106, B21B 100

Patent

active

044804580

ABSTRACT:
A method for decreasing the extent of crop loss during rolling of ingots to semifinished products, such as slabs and blooms, in which a lighter than usual draft is taken during the odd pass, i.e. as the ingot bottom enters the rolls. During the subsequent even pass, as the ingot top enters the rolls, the draft taken is of the usual order of magnitude. These steps of alternate light and heavy passes are conducted until the ingot thickness is about twice the length of the maximum practically achievable contact arc--then the normal drafting sequence is utilized. A yield gain of about 1% or greater may thus be achieved by using such controlled counter-drafting.

REFERENCES:
patent: 4344309 (1982-08-01), Matsuzaki

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