Metal deforming – By use of roller or roller-like tool-element – With modification or control of temperature of work – tool or...
Patent
1996-11-20
1998-07-14
Larson, Lowell A.
Metal deforming
By use of roller or roller-like tool-element
With modification or control of temperature of work, tool or...
72200, B21B 2706
Patent
active
057787166
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a coiler furnace for a hot strip, comprising a strip inlet opening, at least one coiler means formed by a coiler mandrel, a strip outlet opening different from the strip inlet opening and a heat-insulating furnace wall surrounding the coiler means on all sides.
2. Description of the Background
A coiler furnace of this type is known, for instance, from EP-A- 0 619 377. There, the coiler mandrel is movably mounted within the coiler furnace, being movable from a starting position, in which the coiler pick-up of the coiler mandrel comes to lie at the strip inlet opening, in dependence on the coil diameter in a manner that the coil in any phase of coiling by its external side is pressed against two pressing rollers arranged at the strip inlet opening and mounted immovably relative to the coiler furnace. This coiler furnace in the first place serves to receive a hot strip through the strip inlet opening and to convey this hot strip out again through the strip inlet opening by reversibly driving the coiler mandrel. According to a special embodiment, the coiler furnace is provided with a second opening, through which the strip optionally may be conveyed out of the coiler furnace during uncoiling. However, it involves the drawback that the strip end may get open thus clinging to the coiler furnace, in particular in case of a thin and hot and hence soft hot strip.
A coiler furnace of the initially described kind, yet with two coiler mandrels provided in the furnace interior, is known from DE-B- 25 25 302. This known coiler furnace serves to attain extended residence times in the continuous passage of the strip through the coiler furnace in order to enable hot treatment of the metal strip. In doing so, a metal strip is coiled on a first coiler mandrel, from there is recoiled to a second coiler mandrel and is uncoiled from the second coiler mandrel. This known arrangement is expensive and complex in construction. It comprises a great number of movable parts in the interior of the furnace space thus making the coiler furnace prone to failures. Furthermore, only a very particular mode of operation, i.e., coiling, recoiling, uncoiling, can be adjusted, the strip to be coiled having to be coiled at the same speed as the strip to be uncoiled. The adjustment of an individual residence time for a strip within the coiler furnace and hence the observance of a time allowance due to particular circumstances are impossible.
The problem of providing differently long residence times of a coil within the coiler furnace arises, for instance, in the production of a strip by the continuous casting process including a rolling stand immediately following thereupon.
There, the problem arises that the casting speed is not sufficient for an optimum rolling procedure. The rolling speed during hot rolling, as a rule, is higher by a power of ten than the casting speed in a continuous caster. In order to avoid making a compromise that would reduce the quality of the strip, it is, therefore, common to provide strip coiling means between the caster and the consecutively arranged rolling stand, in particular if the latter is a reversing stand.
In that case, a coiler furnace for receiving the continuously cast strip is provided between the continuous caster and a consecutively arranged hot-strip rolling stand in order to allow the heat contained in the continuously cast strip to be utilized as completely as possible in consecutively provided hot-strip rolling.
From EP-B- 0 541 574, EP-A- 0 177 187 and EP-A- 0 321 733 it is each known to provide two strip coiler devices between the continuous caster and the consecutively arranged rolling stand, one coiler device being located above, and one coiler device being located below, the strip plane formed by the strand delivered from the continuous caster and having strip cross section. While one of the strip coiler devices is winding up the strand emerging from the continuous caster and optionally already subjected to prerollin
REFERENCES:
patent: 5009092 (1991-04-01), Buchegger
patent: 5131134 (1992-07-01), Quambusch et al.
patent: 5430930 (1995-07-01), Passoni et al.
MDS Mannesmann Demag Sack GmbH, Peter Meyer, "Thin Slab Caster Combined With a Steckel Mill", this paper was read by Mr. Peter Meyer at the 6th I.A.S.M.O. Annual Meeting, Outokumpu Oy Polarit, 10.-14. Sep. 1990, Tornio/Finland.
Butler Rodney
Larson Lowell A.
Voest-Alpine Industriean-lagenbau GmbH
LandOfFree
Coiler furnace for a hot strip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coiler furnace for a hot strip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coiler furnace for a hot strip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1871747