Year: 1886

page_text: I, CHARLES DENTON ABEL of N° 28 Southampton Buildings, Chancery Lane, in
the County of Middlesex, Consulting Engineer and Patent Agent 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:—
This invention relates to rolling mills for rolling profile iron or steel and refined
metal.
The rolling of profile iron and steel and refined metal has heretofore been
effected in three-high rolling mills, all three rolls of which were regulated by the
screws in the top of the housings, and had grooves of the same calibre. On the
introduction of a bar of metal between the rolls, the resulting pressure was taken
at the top by the screws and at bottom by the base of the housings. Owing to
the elasticity of the iron, a stretching of the housings takes place with this
arrangement, resulting in the production of the rolled metal of a greater thickness
than was intended. The inaccuracy of the rolled metal was further increased if
the bars were passed simultaneously through the first and second and the second
and third rolls, as the rolls were in that case deflected unequally. It was therefore
necessary to first pass the bar completely through the one pair of rolls before
entering it between the other pair, whereby considerable time was lost and the
metal got cooled down to a detrimental extent.
According to the present invention, these disadvantages are obviated by the
employment of a construction of rolling mills, in which, in place of three-high
rolls, there are provided two independent pairs of rolls, separately adjustable and
so arranged that the strain resulting from the introduction of a bar between one of
the pairs only effects a stretching of that part of the housings in which this pair
of rolls is contained, and thus such stretching will be much less in extent than
heretofore. Also, with this arrangement the bar can be passed through the second
pair of rolls while it is still passing through the first pair without producing
inaccurate work through the simultaneous strains on the two sets of rolls.
rule however, the bars should be first run completely through the grooves of large
calibre of the one pair of rolls before being entered into the other pair, the
simultaneous operation in the two sets being reserved for the grooves of small
calibre.
As a
With this invention it is therefore possible to produce much longer bars or rods
at one operation and to almost double the producing capacity of the rolling mill.
A further advantage results from the fact that with two independent pairs of
rolls each pair can have a set of grooves different from those of the other pair,
S

page_text: while with the three-high rolls there can only be grooves of one and the same
calibre, so that with the same length of roll between the headstocks double the
usual number of grooves can be provided. The adjustment of the rolls is also much
more easily and rapidly effected than with the three-high roll system.
Figs. 1 and 2 of the accompanying drawings shew respectively a side elevation
and a cross section of a rolling mill constructed according to the present invention.
In a pair of housings A A are arranged four rolls f, a, g, i, in such a manner that f
and a, form one pair of rolls and g and i form a second pair, a space being left
between the two pairs. The bearings of the roll a are formed by a transverse piece
formed in the solid with the housings, while the bearings of other three rolls are
formed of separate blocks of which those off and g are adjustable both in a vertical
direction and in a horizontal direction towards the rolls. The adjustment of the
upper pair of rolls is effected by the screws b, while that of the lower pair is
effected by the wedges c and h which are moved in one direction or the other
between the inclined faces of the upper bearing block of the roll g and between
the lower face of the bearing block of g and the upper face of the bearing block
of by means of the screws d and j screwing into the wedges and arranged to
revolve but not to move longitudinally in the housing. The lateral adjustment of
the loose bearing blocks is effected by screws screwing into the housings and acting
upon clamps e that press against the blocks. The bearing brasses of the roll a are
also laterally adjustable by means of two screws screwing through the housing
and against the side of the brass. In order to prevent the upper rolls of the upper
pair from falling when the rolled metal passes from between them, the lower
blocks of the bearings for f are supported by suspension bolts passing through the
top of the housings; the adjusting wedges h prevent the roll g from falling. For
preventing the fracture of the rolls or headstocks under undue strain, each pair of
rolls is provided with a breakdown coupling box. The bearing brasses are so
formed that they can be finished in the lathe. The bearing blocks are prevented
from turning by their rectangular shape, fitting in the rectangular guides of the
housings.
As the rolls are adjusted nearer to each other by means of the single wedge cat
each end, such adjustment is rendered comparatively easy, and capable of great
accuracy. It will be evident that the housings might also be so arranged that the
adjustment of the upper pair of rolls is effected by means of wedges while that of
the lower pair is effected by screws. Also, the adjusting wedges might be arranged
to slide in the longitudinal direction of the rolls instead of transversely.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1-Constructing rolling mills for rolling profile iron or steel and refined iron
with two pairs of rolls situated one above the other, combined and operating
substantially as and for the purposes herein described.
2-In rolling mills with two pairs of rolls such as are referred to in the preceding
claims, so arranging the rolls that the lower roll of each pair runs in fixed bearings,
while the bearings of the upper roll of each pair are vertically adjustable, the
bearings of the one roll being adjusted by means of wedges, while those of the
other roll are adjusted by means of screws substantially as herein described.
11000
ABEL & IMRAY,
Agents for the Applicant. 5