DE1008688B - Four-roll mill - Google Patents

Description

GERMAN

The invention relates to a four-roll rolling mill which two thin work rolls supported against lateral bending and for absorbing the rolling pressure has two backup rolls with a larger diameter perpendicular to the rolling plane.

These support rollers are used to laterally support the work rolls against bending in the rolling direction or bars upstream. However, such support means prevent accessibility and visibility to the Work rolls.

Furthermore, concentric pipe shells are used to support the backup rollers, which are attached to the bearings of the back-up rolls are fastened in such a way that the support surfaces of the pipe shells can be adjusted relative to the work rolls.

When the work rolls are supported by pipe shells, the following disadvantages arise: The pipe shells are attached to the bearings of the back-up rolls and have no stiffening effect on the roll stand. You can also use the Pipe sections only a low support pressure can be achieved.

From both facts it can be seen that such four-roll mills are only suitable for small roll widths The invention eliminates the shortcomings mentioned and consists in that the backup rolls are each enclosed by a housing, the ends of each housing being their associated Support the work roll against sagging in the rolling direction with the help of a movable beam, and that the part of the housing facing away from the work rolls is rigidly connected to the roll stands. This has the advantage that the supports used for the work rolls with the stands are firmly connected, whereby a strong stiffening of the entire rolling mill is achieved.

Another advantage! «Is the support of the Work rollers by means of a sliding bar mounted on the housing, which is all attached to the rollers in a plane parallel to the roll direction can take over forces acting properly. Simultaneously Such a design of the rolling mill enables better accessibility to the work and Back-up rollers in that the movable shell halves having beams are easily removable.

An example embodiment of the subject matter of the invention is illustrated in the drawing. It shows

1 shows a longitudinal section through a rolling mill in a diagrammatic representation,

2 shows a partial section through the upper and lower support roller with the housing parts surrounding them,

Fig. 3 is a view of the rolling mill.

Four-roll mill.

Applicant:

society

the Ludw. von RoU'schen Eisenwerke

Aktiengesellschaft,
Gerlafingen (Switzerland)

Representative: Dipl.-Ing. B. Wehr, Dipl.-Ing. H. Seiler,

Berlin-Grunewald, Lynarstr. I ₁
and Dipl.-Ing. H. Stehmann, Nuremberg 2, patent attorneys

Claimed priority:
Switzerland from November 22nd, 1954

Albert Forster, Delsberg (Switzerland),
has been named as the inventor

The stands 1 of the rolling mill are supported by housings 2 and 3, which enclose the support rollers 4 and 5, connected with each other. Of course, the stand and housing can also form one piece. For support in the rolling direction of the work rolls 6 and 7 are on the housings 2 and 3 bars 8 by means Screws 9 fastened adjustable parallel to the rolling direction, which together form a funnel-shaped Form cross-section. Instead of the screws 9, the bar 8 can of course also be used for adjustment any other known means can be used. For example, compression springs, eccentrics, Turn wedges or pistons operated by a pressure medium, etc. provided. The bars 8 point insertable rails 11, which serve to support the work rolls 6 and 7 and are made of stock material, such as bearing metal, plastics, etc. exist to prevent seizure of the work rolls on the To prevent support rails. For cooling or, if necessary, for heating the work rolls 7, 8 of the Al> support rollers 4, 5, the space 12 between the Housings 2 and 3 and the support rollers 4, 5 by means of cooling oil, for example drilling oil, or a heating medium are flushed through, whereby at the same time a lubrication between the rollers 6 and 7 and the Rails 11 is guaranteed.

By connecting the two uprights 1 to one another by the housing 2 and 3 the stability of the whole rolling mill is increased significantly. the

709 510/143

as a storage of the support beams serving, attached to the roll stand housing result in low Material expenditure a high strength in the rolling direction and allow the attachment of horizontally slidable funnel-shaped support beams that leave a view of the rolled piece.

Claims (4)

Patent claims: 1. Four-roll mill with two work and two backup rolls, the latter of which through each a housing are enclosed with the ends of each housing against the associated work roll Support deflections in the rolling direction, characterized in that the work rolls remote part of the housing is rigidly connected to the roll stand and the ends of the Housing than on this housing part in rolling mill slidably mounted beams formed tong
are. 2. Four-roll rolling mill according to claim 1, characterized in that the two bars together form a funnel-shaped cross-section. 3. Four-roll rolling mill according to claim 1, characterized in that the bars at the contact point of the work rolls have rails made of a stock material. 4. four-roll rolling mill according to claim 1, characterized in that the space between the Housings and the support rollers can be flushed through in a known manner by a cooling or heating means is. Considered publications:
German patent specification No. 914 001. 1 sheet of drawings I 709 510/143 5.57