Improvements in Rolling Wire and Bars.
Year: 1896

page_text: Improvements in Rolling Wire and Bars.
I, GUSTAF LURMANN, of Gunnebo, Werkebäck, Sweden, Manager, do hereby declare
the nature of this invention to be as follows:-
This invention has reference to a new method of rolling wire and round bars,
whereby a better product is obtained and much less mechanical power is necessary
than by drawing the wire through a draw plate as heretofore usual.
The improved method consists in treating the material between three conical
rollers, which are caused to roll around the material. The rollers are mounted to
rotate simultaneously about their own axes and also around the axis of the wire or
bar under treatment. By this means the wire or bar is stretched and reduced in
thickness without such disadvantageous alterations in its quality as usually result
when the well known method of drawing wire is employed. The fibrous nature or
texture of the material is not changed into a granular and short one, as is the case
when the wire is drawn in the usual way, and consequently the product resulting
from my improved method of manufacture is much superior in quality. Moreover
the material is stretched and reduced in thickness with less friction, so that power is
saved. Also the scale or crust adherent to the wire or bar is easily released from it
during the rotation of the rollers. Consequently the separate cleansing of the wire
or bar, hitherto necessary, can be dispensed with, which is of great importance
especially by the employment of cast metal, which is very sensitive to acids.
The wire or bar is fed into the machine in the usual manner by means of feeding
rolls, drawing-rolls or the like, and the feeding may be facilitated by mounting the
rollers in such a way that the top ends of the rollers during their movement around
the material will get the start of the thicker ends, where the wire or bar is
introduced, whereby the wire or bar is spirally fed between the rollers towards the
winding apparatus.

page_text: I, GUSTAF LURMANN, of Gunnebo, Werkebäck, Sweden, Manager, 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 has reference to a new method of rolling wire and round bars,
whereby a better product is obtained and much less mechanical power is necessary
than by drawing the wire through a draw-plate as heretofore usual.
The improved method consists in treating the material between three conical
rollers, which are caused to roll around the material.
A machine for carrying out this method is illustrated in the accompanying
drawings, in which
Fig. 1 is a diagrammatic side elevation and
Fig. 2 is a plan thereof.
Fig. 3 is a partial longitudinal section.
Fig. 4 a cross section, and
Fig. 5 a partial side elevation.
As will be seen from the drawing, the whole construction is very simple and consists
principally in three conical rollers a¹, a², a³, which are so arranged in relation to one
another that their axes converge towards a common point. These rollers have as a
bearing a conically bored socket 6 placed in a support B, so that the distance between
the rollers may be varied by moving or adjusting the said socket.
The spindles m¹, m2, m³ have their ends remote from the rollers a¹, a², a mounted
in a disc f, which is rotatably mounted on a standard A. These spindles receive their
motion from a toothed wheel g, which is also mounted on the standard A and is rotated
by means of a shaft i and a toothed wheel h. The spindles are thus made to rotate
around the axis of the toothed wheel g. Each of the spindles m³, m², m³ carries a
bevel-wheel d, which gears into a stationary toothed wheel e fixed to the standard A.
When the spindles m¹, m², m³ rotate around the axis of the toothed wheel g, the
wheels d run round the toothed wheel e and cause the spindles m³, in², m³ and the
rollers a¹, a², a³ which are coupled with the spindles, to rotate around their own axes
simultaneously with their rotation around the axis of the wheel g. In order to
facilitate this movement of the spindles m³, m², m³ caused by the toothed wheels h
and g, there may be used, especially if the spindles m³, m², m³ be long, an additional
toothed wheel g₁ driven from the shaft i by means of a toothed wheel h¹.
The socket b, which rests in the support B and embraces the rollers a', a², a³, may
be displaced to the left or to the right so as to cause the rollers a¹, a², a³ to increase
or decrease the distance of the rollers from one another in order that wire or bars
may be rolled of greater or less thickness. In order to render the wear of the inside
of the socket 6 uniform and to diminish the friction during work, the socket itself is
rotated by means of the gearing g² h², so that fresh parts of the inner surface of the
socket constantly come into contact with the rollers. The socket b within which the
rollers a¹, a², a³ are placed, is mounted in such a manner that its axis lies in the pro-
longation of the axes of the wheels gand e and the discf. The material (wire or bar)
is fed through a hole k bored in these wheels and disc and it is introduced centrally into
the space between the rollers a¹, a², a³, so that the rollers rotate about the axis of the
wire or bar simultaneously with their rotation about their own axes. By this means
the wire or bar is stretched and reduced in thickness without such disadvantageous
alterations in its quality as usually result when the well known method of drawing wire
is employed. The fibrous nature or texture of the material is not changed into a
granular and short one, as is the case when the wire is drawn in the usual way, and

page_text: consequently the product resulting from my improved method of manufacture is much
superior in quality. Moreover the material is stretched and reduced in thickness with
less friction, so that power is saved. Also the scale or crust adherent to the wire or
bar is easily released from it during the rotation of the rollers. Consequently the
separate cleansing of the wire or bar, hitherto necessary, can be dispensed with, which
is of great importance especially when the wire or bar operated upon is of cast metal,
which is very sensitive to acids.
The wire or bar is fed into the machine in the usual manner by means of feeding-
rolls, drawing-rolls or the like, and the feeding may be facilitated by mounting the
rollers a, a, a³ in such a way that the top or forward ends of the rollers obliquely
overlap one another so that they grasp the wire or bar a moment before the thicker
ends, whereby the wire or bar will be spirally fed between the rollers towards the
winding apparatus.
The improved rolling-mechanism may be used for cold as well as for warm rolling
of wire or bars.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The method of rolling wire and bars consisting in treating the material with
three conical and convergent rollers, which during their rotation about their own axes
simultaneously roll around the material that is to be stretched and reduced in
diameter, substantially as herein before described.
2. A machine for rolling wire and bars in which three conical rollers are mounted
to rotate simultaneously about their own axes and also around the axis of the wire or
bar under treatment, substantially as and for the purpose set forth.
3. In a machine for rolling wire or bars the combination of three conical convergent
rollers, a rotating disc placed so as to be co-axial with the space between the said
rollers and provided with bearings for the spindles of the rollers, and a stationary
toothed wheel gearing into pinions on the said spindles, substantially as and for
the purpose set forth.
4. In a machine for rolling wire and bars, the combination with three conical
convergent rollers, a conically bored rotating socket embracing the said rollers and
adjustable longitudinally, a rotating disc placed so as to be co-axial with the space
between the rollers and provided with bearings for the spindles of the rollers, and a
stationary toothed wheel gearing into pinions on the said spindles, substantially as
and for the purpose set forth.
5. A machine for rolling wire and bars, constructed, arranged, and operating
substantially as hereinbefore described with reference to and shown in the
accompanying drawings.
Datcu C1115
απο του
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.