Improvements in and relating to the Rolling of Metal Bars, Plates, and the like, and to Apparatus therefor.
Year: 1889

page_text: Date of Application, 30th Sept., 1889-Accepted, 2nd Nov., 1889
Improvements in and relating to the Rolling of Metal Bars, Plates,
and the like, and to Apparatus therefor.
I, GUSTAV BRISKER of Königshütte, Prussian Silesia in the Empire of Germany,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The improvements forming the subject of this invention consist in so arranging
two roller or three roller mills that, as the metal emerges from the pair of rolls whose
action it is undergoing it is bent by one or more guide-rolls capable of a rising and
falling motion; in such a manner that, passing over the upper roll in two roller
mills or between the middle and upper roll in three roller mills the metal is brought
round again to the front side of the mill. And as soon as the whole piece is thus
delivered at the front, it is caused to pass again through a pair of rolls i.e. between
the upper and lower, or the upper and middle, roll, as the case may be.
The rising and falling guide rolls may be arranged in a variety of ways, provided
always that the arrangement is such, that after each passage between the rolls, the
metal piece is either bent and carried back to the front or may issue in a straight
shape behind the rolls.
When a table or platform is arranged at the back of the rolls capable of being
raised, as in mills for sheet-iron and iron-of-all-sections, it can, if desired, (and
without any special preparation) he made use of for raising and carrying back the
metal, each time the same emerges from between a pair of rollers; this arrangement,
applicable to each of the different types of mills hereinafter described enables the
metal to be subjected to the bending operation after it emerges from one pair of
rolls or to be left straight at will, no matter at what rate of speed the rolling is
carried on.
In the case of three high mills the tail or end of the rolled and bent metal piece is
enabled by the peculiar construction and operation of the rising and falling guide
rolls, to freely increase in width towards the back. The invention is illustrated in
the accompanying drawings the Figures of which are hereinafter referred to.
The arrangement of these guide-rolls is susceptible of the following variations.
(1) A roller to Figure 1 may be raised or lowered by a cylinder c.
Before the metal piece leaves the rolls at the back, the guide roll w is slightly
raised, and thereby imparts to the emerging metal an upward bend; as the metal
further emerges the roll we continues to ascend, and to bend the same so as to cause
it to pass between the upper working roll and what may be called a dragging roller c,
or, in the case of a three roller mill, between the middle and upper roll.
Plate prevents the metal from rising too high.
A stripper a and the straightening roll a, the metal piece as it emerges on the
front side, is straightened again. When it has passed to the opposite side, as
explained above, roller w sinks to the level of the table again.
(2) Guide roller w may also as shown in Figure 5, be connected with the lifting
table, and rise and fall in conjunction with the latter.
(3) Two or more rising and falling guide rollers w and we may be provided, instead
of one as shown in Figure 2 and adapted to move up and down either simultaneously
or independently of each other.
(4) Rollers w, w¹ may also, as illustrated, in Figure 3, be connected by a curved
link b.
The roll win this
case, is loose on its shaft which is fitted with excentric fixed
pivots z (Figure 3). Before the metal piece emerges from the pair of rolls, the

page_text: I
link b is turned on pivots and raised, by cylinder c, whereby owing to the excentric
situation of the said pivots roll w is also slightly raised.
The metal is then bent, in a manner both simple and effective, and conducted back
to the working rolls and as soon as it is grasped or seized by the rolls link bis
allowed to drop, so that the guide rolls are brought back to the level of the table.
In case the metal comes out in a straight shape these guide rollers form part of the
table.
(5). Guide rollers w. w² connected by a link, as aforesaid may, if desired, be
further connected with the table as illustrated by Figure 6 and rise and fall with
the same.
Before the metal leaves the rollers, the table is, in this instance raised to the
position indicated in dotted lines, where it remains as long as it is desired that the
metal piece should be carried from one side to the other.
When it is deemed necessary that the piece of metal, either finished or not, should
come out from between the working rolls in a straight shape, the table is allowed to
sink just before the metal emerges, as indicated by dotted lines.
(6) One of the guide rolls w may be arranged behind the strippers of the lower
working roller (Figure 4) and turn loosely on a shaft, the pivots of which are fixed
excentrically, similarly to those shown in Figure 3^.
A link & carrying another guide roller w¹ is hinged to plate and caused to rise and
fall by a cylinder C.
Before the metal piece leaves the rolls the roll w is caused by a suitable lever to
turn through an angle of 180°, and owing to the excentric position of its shaft it is
thereby slightly raised while at the same time the link b with the roll w¹ is allowed
to descend, so that, here again the passage of the metal from one side to the other
takes place in an easy and efficient manner.
In case this arrangement is applied to a three roller mill, the roll w, after the
passage of the metal from one side to the other, is turned back to its original position,
while the roll w rises with link b, so that nothing prevents the tail of the metal piece
carried to the opposite side from increasing in width towards the back.
By means of the above described modifications of my improved guiding arrange-
ment of rolling mills, the following advantages are obtained in the manufacture of
sheet iron, iron-of-all sections, bars, billets, and the like.
(1) In the devices hitherto used for conveying the rolled metal from one end of
the machine to the other, (the application of which was practically confined to wire
and thin iron bands, they being unfit for other purposes) the same metal piece is only
carried over once. In my improved mill, on the contrary, all iron pieces capable of
being worked in a rolling mill, irrespective of width or thickness, including sheet
iron and iron of all sections may, in the same way, be guided backwards and
forwards; and the metal is; after each passage between the rolls, caused to go through
the same guiding contrivance. In the case of grooved rolls, the metal may by the
same means be shifted from one pattern roll on to the other. Besides each time the
metal emerges from a pair of rolls, it may at will, be made to go through the bending
and guiding mechanism described, or allowed to leave the rolls in a straight condition;
which choice is not allowable in any of the systems hitherto known.
(2) In rolling iron of all sections and sheet iron with the assistance of the bending
and guiding device, the metal, being alternately bent and straightened, is freed from
any slag or scales that may adhere thereto. Besides, each time it passes between the
rollers, it is turned over so that the upper surface at the time is not the same which
was turned upward during its preceding passage between the rolls; by this means
either side of the metal sheet or band may in turn be scraped and freed from any
impurities, which enables a better quality of sheet iron to be turned out, and
diminishes the waste.
(3) In rolling flat bars or bands by means of grooved rolls, the necessity of turning
round the metal piece, at an angle of 180°, every time it leaves the pair of rolls, to
avoid the formation of burr is obviated.

page_text: (4) Owing to my turning over devices, a different end of the metal piece is first
inserted between the rolls each time, even in double or two roller mills; so that it is
uniformly rolled in either direction exactly in the same way as if the mill was a three
roller one.
(5) The arrangement herein described enables the production to be increased and
to considerably reduce the cost of labour.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is
In rolling sheet iron and iron of all sections, bars, billets, bands and the like the
method of bending and carrying the piece which is being rolled,across to the front as
it emerges from between a pair of rolls at the back of the mill, by means of rising and
falling guide rolls fitted in, or connected with, the table or platform in a manner
enabling them to assume their original position as soon as the-metal has been carried
across the same the space behind the working rolls being thus left perfectly free, so
that each time the metal has passed between the rolls, it may be either bent over and
carried back to the front, or it may be allowed to emerge unbent and pass back in
the ordinary way; for which purpose the arrangement of the turn over or guide-rolls
may be modified as follows:
(1) A single roll w, capable of a vertical rising and falling motion, as shown in
Figure 1, may be used.
(2) A single roll w (Figure 5) may be connected with the table or platform, and
made to rise and fall with the latter simultaneously.
(3) Two or more vertically rising and falling rolls w w (Figure 2) may be
provided.
•
(4) Two or more rising and falling rolls w w¹ (Figure 3) may be connected by a
bent and hinged piece or link b, and thereby caused to describe a curve in moving
up and down.
(5) Two or more rolls w 10¹ connected with each other by a link b (Figure 6) may
at the same time be connected with the table, and rise and fall with the latter,
as shown.
(6) Two rolls w w¹ may be provided, one of which is adapted to carry the metal
across as it rises, while the other, connected with a link & performs a curved downward
notion, as shown in Figure 4.
Dated this 30th day of September 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.