Improvements in connection with Rolling Mills for Cold Rolling.
Year: 1898

page_text: Date of Application, 26th May, 1898
Complete Specification Left, 27th Feb., 1899-Accepted, 15th Apr., 1899
PROVISIONAL SPECIFICATION.
Improvements in connection with Rolling Mills for Cold Rolling.
We, KYNOCH LIMITED, Manufacturers, and EDWARD JONES, Engineer, all of
Lion Works, Witton, in the County of Stafford, do hereby declare the nature of
this invention to be as follows:-
Our invention relates to rolls for cold rolling, and is specially applicable
to rolls for rolling brass strip.
Our object is to leave the rolls free to adjust themselves to any slight differ-
ence in diameter which may be due to wear or any other cause, so that when
one roll is slightly larger in diameter than another, the surface velocities,
where in contact with the brass, may be absolutely the same.
Our invention consists in driving one roller of say a two-roll mill, preferably
Instead
the lower roller, by any ordinary gear, in the usual positive manner.
of gearing the other roller to the positively driven roller by toothed wheels or
other positive gearing, we drive it by means of a belt, either from the lower
roller, or from some other shaft moving at a suitable speed. In such a rolling
mill we provide the bearings with rollers, that is, we adopt roller bearings
instead of the ordinary fixed bearings. This combination has the advantage
that any slight difference in diameter does not cause grinding on the surface of
rolls
the brass or other metal strip. The surface speeds of the two
adjust themselves. The belt, of the belt driven roller, slips slightly, to suit any
At the same time the
variation in speed due to difference in diameter of rolls.
arrangement has the advantages over any device depending upon the friction of
the two rolls to move one from the other. The upper or one of the rolls being
driven by belt is always moving with the lower roller, and the metal feeds
readily into the mill.
The invention may be applied to three or more roll rolling mills, as well as
to two-roll mills.
Improvements in connection with Rolling Mills for Cold Rolling.
We, KYNOCH LIMITED, Manufacturers, and EDWARD JONES, Engineer, all of
Lion Works, Witton, in the County of Stafford, do hereby declare the nature of
[Price 8d1

page_text: this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:--
Our invention relates to rolls for cold rolling, and is specially applicable
to rolls for rolling brass strip.
Our object is to leave the rolls free to adjust themselves to any slight differ-
ence in diameter which may be due to wear or any other cause, so that when
one roll is slightly larger in diameter than another, the surface, velocities,
where in contact with the metal being rolled, may be absolutely the same.
Instead
Our invention consists in driving one roller of say a two-roll mill, preferably
the lower roller, by any ordinary gear, in the usual positive manner.
of gearing the other roller to the positively driven roller by teethed wheels or
other positive gearing, we drive it by means of a belt, either from the lower
roller, or from some other shaft, moving at a suitable speed. In such a rolling
mill we provide the bearings with rollers, that is, we adopt roller bearings
instead of the ordinary fixed bearings. This combination has the advantage
that any slight difference in diameter does not cause grinding on the surface of
the brass or other metal strip being rolled. The surface speeds of the two rolls
adjust themselves. The belt, of the belt driven roller, slips slightly, to suit any
variation in speed due to difference in diameter of rolls. At the same time the
arrangement has advantages over any device depending upon the friction of
the two rolls to move one from the other. The upper or one of the rolls being
driven by belt. is always moving with the lower roller, and the metal feeds
readily into the mill.
The invention may be applied to three or more roll rolling mills, as well as
to two-roll mills.
Referring to the accompanying two sheets of drawings-
Figure 1 is an elevation, and
Figure a plan with the main shaft D removed showing our invention applied
to one form of construction of two roll rolling mill.
Figure 3 shows a side elevation, and
Figure 4 an end elevation of one modification of the roller bearings for such
rolling mills.
In carrying out our invention as illustrated in the accompanying drawings,
we use a pair of rolls such as A and E, suitable for rolling sheet metal as des-
cribed below. The top roll A is driven by means of the gear wheels B₁ B
from the pulley on the main shaft D through the belt C³ and pulley C¹. The
bottom roll E is driven by means of the gear wheels and pinions F1, F2, F3,
and F, from the pulley G³ on the main shaft D through the belt G³ and pul-
ley G¹. The usual screw devices shown at H and H are used to set the rolls
for the thickness of metal to be rolled. The journals A¹ and E¹ of the rolls A
and E are carried in the cheeks I, by the roller bearings J and J2 shown in
detail in Figures 3 and 4. The top bearing J is adapted to move vertically
by the operation of the screw H¹ acting on the bearing block H³. The bearing
has two main steel half rings J3 J which are bored out to receive the steel
rollers K. The latter are supported in a brass cage L having a steel end plate M
attached to it by screws M. The steel rollers K are also arranged of suitably
different length in order to overlap their joints as shown, to prevent grooves
being produced in the journals and rings by unequal wear where the rollers
meet.
The cage L serves to keep the rollers in proper relative position by means of
its bars L. Cover plates N are provided to protect the ends of the bearings.
The bottom bearing has two steel half rings
all similar to those in the top bearing.
and J, rollers K, and cage L,
It will be obvious that various modifications of the gearing driving the rolls
may be made without departing from our invention, which is characterized by
having one or both of the rolls driven from the source of power by a belt, rope,

page_text: or other similar non-rigid transmission gear, and not by rigid gearing, in such
manner that the surface velocities of the rolls may be absolutely the same.
In the ordinary method of driving rolling mills the rolls are rigidly geared together
and when wearing of the rolls takes place, which always occurs unequally, the
rolls become of different diameter. This difference tends to increase as their
surface velocities are different, when driven at the same angular speed as must
be the case with rigid gearing. If this wear be allowed to go too far the gear
wheels will be destroyed. It is therefore customary to turn up the rolls very
frequently to keep them of exactly the same diameter.
We find that with the rolling mill above described these difficulties are very
much reduced as the belt or other nonrigid drive enables the rolls to run at
the same surface velocity. The slipping of the belt compensates for any small
difference which therefore does not tend to increase.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:--
1. In rolling mills, connecting one or both rolls to one or more sources of
power in such a manner as to allow of compensation taking place for any differ-
ences in the angular velocities of the rolls so that their surface velocities may
be always the same, substantially as hereinbefore described.
2. The improved rolling mill herein before described, with reference to
Figures 1 and 2 of the accompanying drawings.
"
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, and 25, Cross Street,
Manchester, Agents.