Apparatus Employed therein.
Year: 1887

page_text: Date of Application, 6th Aug., 1887
Complete Left, 7th May, 1888.
Complete Accepted, 13th July, 1888
Apparatus Employed therein.
We EDWARD COPE, Steel Manufacturer, and ALFRED HOLLINGS, Manager of High
Bank Steel Works Openshaw, Manchester, in the county of Lancaster do hereby
declare the nature of this invention to be as follows:-
Our present improvements relate to the manufacture of rolled drawn metallic tubes
and more particularly Steel Tubes, which Tubes from the novel action on the metal
during manufacture possess exceptional uniformity and closeness of texture and aro
capable of withstanding greatly increased strains.
We take a hollow ingot or hollow cylindrical blank and first roll it down, preferably
when heated, between powerful rolls, and stationary mandrills, the rolls being behind
each other and speeded to take the increased length due to each through passage.
We then subject the metal of each tube to a rolling or squeezing action around its
longitudinal axis. This is effected by a revolving Tube expander acting on the interior
surface, and revolving rolls acting outside the latter being so mounted that they can
recede from the centre to allow for the increased diameter of the tube, due to rolling
and consequent arrangement of the particles of metal.
.
The apparatus which we employ has the sets of rolls behind each other with revolving
or other guides between. The tube is caused to travel longitudinally between the
Expander and revolving rolls.
It will be evident that during the first stage of our New Manufacture the cross
section of the Tube blank will be gradually reduced in external and internal diameter
as well as increased in length whilst in the second stage the internal and external cross
section will both be increased without elongation of the Tube.

page_text: Apparatus Employed therein.
We EDWARD COPE, Steel Manufacturer, and ALFRED HOLLINGS, Manager, of High
Bank Steel Works, Openshaw Manchester, in the county of Lancaster, do hereby
declare the nature of this invention and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement:
Our present improvements relate to the manufacture of rollod, drawn metallic tubes
and more particularly steel tubes, which tubes from the novel action on the metal
during manufacture possesses exceptional uniformity and closeness of texture and are
capable of withstanding greatly increased strains.
We take a hollow ingot or hollow cylindrical blank and first roll it down, preferably
when heated, between powerful rolls and stationary mandrels, the rolls being behind
each other and speeded to take the increased length due to each through passage. We
then subject the metal of each tube to a rolling or squeezing action around its longitudinal
axis. This is effected by a revolving tube expander acting on the interior surface and
revolving rolls acting outside, the latter being so mounted that they can recede from
the centre to allow for the increased diameter of the tube due to rolling and consequent
arrangement of the particles of metal.
The apparatus which we employ has the sets of rolls behind each other with
revolving or other guides between. The tube is caused to travel longitudinally
between the expander and revolving rolls.
It will be evident that during the first stage of our new manufacture the cross
section of the tube blank will be gradually reduced in external and internal diameter
as well as increased in length. Whilst in the second stage the internal and external
cross section will both be increased without material elongation of the tube.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a side elevation fig. 2 a plan and fig. 3 an end elevation of the first
portion of apparatus used in the manufacture of tubes under our invention, fig. 4 is
a sectional view. 1 frame, 2 rolls carried in bearings 3, 4 driving gear for giving
increased speed to the rolls as the tube passes between them, 5 mandrel 6 tube being
drawn, 7 guide rollers, between the rolls. The general construction of the apparatus
is similar to that usually employed by us for reducing tubes by rolling and the speed
gear is adjusted to give the required speed to each pair of rolls.
Fig. 5 is a vertical section and fig. 6 an end view of apparatus for carrying the
second part of our invention into effect. a standards, b sleeves connected by cheeks c
and free to rotate in bearings d, e driving pulley. foutside rollers carried in bearings g
free to slide to and from the centre of the sleeves in guides . The bearings g are

page_text: connected by rods i to weights ; on the opposite side of the centre of the sleeve to
that of their respective bearings. A collar free to slide on the sleeve and coupled to the
weights by rods so that the weights and rollers can be adjusted by hand if necessary
or by other means. m mandrel fitting within the sleeve and provided with expanding
rollers n.
The mandrels in this and the previously described apparatus are held in
position in the manner usual with us and the expanding apparatus for carrying out
the second part of our process may be of any usual or suitable type.
The action is as follows:-The tube is first passed through between the rolls
figs. 1. 2. 3. & 4 and reduced in diameter, and generally in thickness, the said tube is
then passed through the expander and increased in diameter and reduced in thickness
by means of the internal and external rolls. The centrifugal action of the weights of
the external rolls cause the said rolls to effectively act on the outside of the tubes.
The reduction and expansion of the tubes having regard to the usual practice is as
shown on the drawings somewhat excessive so as to render the action clear.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what we
claim is.
First. The manufacture of steel and other metallic tubes by down drawing between
rolls and afterwards subjecting to interior and exterior pressure substantially as
described.
Second. The combination of apparatus for drawing down and expanding metallic
tubes substantially as set forth.
Third. Apparatus having in combination drawing down and guide rollers for the
purpose set forth.
Fourth. Apparatus having in combination external and internal rolls for the
purpose set forth.
I ' FIL
1000