THIN STRIP PRODUCING METHOD IN HOT ROLLING MILLS Russian patent published in 2007 - IPC B21B1/26 

FIELD: rolled stock production, possibly manufacture of coiled thin hot rolled strip in rolling mills provided with coiling apparatus having shaping rollers.

SUBSTANCE: method comprises steps of rolling strip in rough and finish groups of stands; coiling strip due to clamping strip end by means of drum of coiling apparatus and shaping rollers placed with predetermined gap relative to generatrix of drum; creating strip tension after coiling several turns; further coiling of strip at rolling process speed when shaping rollers are drawn apart from strip. At rolling strip in finish stands portion of front end of strip whose length is equal to circle length of drum is formed in such a way that to provide its variable lengthwise thickness difference gradually increasing to middle of said portion. In beginning of said portion strip thickness is less, equal to or more than nominal one. In middle of said portion strip thickness exceeds that of beginning part by value of nominal thickness of strip. In ending part of said portion strip thickness is equal to nominal one while length of portion (along strip motion direction) with thickness more than initial thickness and non-lowered by absolute value is less than pitch of shaping rollers. At clamping strip rollers are spaced from drum generatrix by distance equal to thickness of strip in beginning part.

EFFECT: enhanced efficiency, improved operational reliability of mechanisms of coiling apparatus.

2 dwg