Improvements in or relating to Machines for Rolling Blanks, Tubes, and the like.
Year: 1899

page_text: Date of Application, 19th June, 1899
Complete Specification Left, 19th Feb., 1900-Accepted, 7th Apr., 1900
PROVISIONAL DIECIFICATION.
Improvements in or relating to Machines for Rolling Blanks, Tubes,
and the like.
I, HEINRICH EHRHARDT, Civil Engineer, of Reichsstrasse 20, Düsseldorf, in
the Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
This invention relates to machines for rolling blanks tubes and the like.
Taking as an example a rolling machine for making double tubes, two discs
keyed on to the driving shaft carry between them a series of rollers which are
formed to correspond to the profiles or sections to be produced by the rollers.
For instance six rollers may be provided on each top and bottom device. The
operation is as follows:-The discs with the rollers are rotated in opposite
directions and contrary to the movement of the work.
The rollers roll and press on the work, the latter being thereby drawn out and
forced to assume the required profile or shape.
In this work it is immaterial in which direction the work moves: it may
advance in or against the direction of movement of the rollers, the rollers may also
differ from each other as regards dimensions or diameters of their projecting
er recessed parts, forming increasing or decreasing profiles for the purpose of
effecting a more energetic rolling or shaping of the work.
In making tubular structures the core or mandrel is firmly fixed and consequently
dces not participate in the movement of the work. The movement of the work
may be continuous, but it is preferable to render it dependent on the number of
rollers, and to arrange it in such a manner that the movement increases during
the time a roller is at actual work or in contact with the work or so that the
work is moved only during each phase of work.
As will be seen from the above the new rolling device permits of a periodical
rolling or drawing out, while the work steadily advances.
TY
101
1
" T
1000
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Machines for Rolling Blanks, Tubes,
and the like.
I, HEINRICH EHRHARDT, Civil Engineer, of Reichsstrasse 20, Düsseldorf, in
the Empire of Germany, do hereby declare the nature of this invention and in
Price Sl

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
Figures 1 and 2 represent by their example a pair of roller devices for rolling.
out blanks, rods, tubes and the like.
In
The drawing represents a rolling machine for making double tubes.
Figure 2 the front rollers are omitted for the sake of clearness. Two discs a
keyed on to the driving shaft carry between them a series of rollers b, which are
formed to correspond to the profiles or sections to be produced by the rollers.
According to the drawing six rollers are provided on each top and bottom device.
The operation is as follows:-
"
The discs a with the freely rotatable rollers b are rotated in the direction indi-
cated by the arrows, and in this case, contrary to the movement of the work,
which is fed or drawn through the machine.
The rollers roll and press on the work c, the latter being thereby drawn out
and forced to assume the required profile or shape.
It is however, immaterial in which direction the work moves; it may advance
in, or against the direction of movement of the rollers; the rollers may also
differ from each other as regards dimensions or diameters of their projecting
or recessed parts, forming increasing or decreasing profiles for the purpose of
effecting a more energetic rolling or shaping of the work.
In making tubular structures the core or mandrel d is firmly fixed, as at e,
and, consequently, does not participate in the movement of the work. The move-
ment of the work may be continuous but it is preferable to render it dependent
on the number of rollers, and to arrange it in such a manner that the movement
increases during the time a roller is at actual work or in contact with the work,
or so that the work is moved only during each phase of work.
As will be seen from the above, the new rolling device permits of a periodical
rolling or drawing out, while the work steadily advances.
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. Apparatus for rolling blanks, rods, tubes or the like comprising a series of
rollers concentrically arranged to the axis of the driving shaft, said rollers having
profiles corresponding to the form which the blank is intended to receive, substan-
tially as described..
2. Rolling apparatus of the kind described, in which the rollers are of varying
diameters, and profiles, in such a manner as to produce profiles of gradually
increasing or decreasing dimensions, substantially as described.
Dated this 19th day of February 1900.
BOULT, WADE & KILBURN,
Agents for the Applicant.