Improvements in Hydraulic Forging Presses.
Year: 1890

page_text: Date of Application, 25th Sept., 1890
Complete Specification Left, 25th June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Forging Presses.
I, FREDERIC WILLIAM WALKER, Engineer, Goodman Street Works,
Hunslet, Leeds, do hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in hydraulic forging presses.
In the improved forging presses the ram of the press is stationary and is carried
by columns. There are four columns and they are attached to a large flange at the
upper end of the ram which flange serves as a crosshead. The columns are inclined
inwards towards the ram and at their lower ends they are wide apart, allow-
ing ample room for the work to be entered and manoeuvred between them.
The main cylinder of the press moves along the ram and it is guided by guide bars
fixed by their upper ends to the crosshead.
At their lower ends the guide bars are fixed to girders which connect the columns
near the ground but sufficiently high up to give headway for the work to pass
beneath them. There are guide grooves formed upon the exterior of the main
cylinder into which the guide bars are received.
The upper forging block is carried at the lower end of the cylinder and the lower
forging block is immediately beneath supported upon the foundation girders or lower
crosshead.
To lift the main or forging cylinder two other or auxiliary cylinders are attached
to it one on either side and these receive within them upright rams which at their
lower ends are fixed upon the girders connecting the columns. Water under
pressure is supplied to these auxiliary cylinders and so the main cylinder with the
upper forging block is lifted.
When the downward stroke of the press is required to be made for the purpose of
compressing the work between the forging tools, water under pressure is admitted
to the main cylinder.
Sometimes I modify the construction by placing the columns upright and they
then serve as guides for the main cylinder casting as it moves up and down.
Small hydraulic cylinders upon the base girders at diagonally opposite corners
by means of their rams support the main cylinder. When water is allowed to escape
from the small supporting cylinders the main cylinder with the upper forging block
descends. Water is supplied from a tank to the main cylinder during the downward
stroke, it enters past a non-return valve. The pressure water is admitted to the
cylinder to complete the stroke when the upper forging block is in contact with the
work.
The return stroke is obtained by admitting pressure water to the small cylinders
whilst water is allowed to escape from the main cylinder into the tank.
In some cases I arrange two auxiliary cylinders one on either side of the main
cylinder; these can be used separately when a light pressure only is required or in
conjunction with the main cylinder for a heavy pressure.
Dated this 24th day of September 1890.

page_text: COMPLETE SPECIFICATION.
Improvements in Hydraulic Forging Presses.
I, FREDERIC WILLIAM WALKER, Engineer, Goodman Street Works
Hunslet, Leeds, 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 forging presses and has for its object to simplify the
structure of the same and to increase the efficiency.
At the head of the press a stationary inverted ram is carried by four inclined
columns attached to a flange at its upper end. The main cylinder of the press
receives the ram within it and it is forced downwards when water under pressure is
admitted to the cylinder through the ram. The work is then compressed between
the forging tools; the lower one of which is supported by the base girders of the
press and the upper is attached to the lower end of the main cylinder. Auxiliary
hydraulic cylinders are provided to lift the main cylinder.
Figure 1 of the annexed drawings is a front elevation and,
Figure 2 is a side elevation of a forging press in accordance with my invention.
Figures 3, 4, 5 and 6 show a modification.
In the improved forging presses the ram a of the press is stationary and is carried
by columns. There are four columns and they are attached to a large flange a¹
at the upper end of the ram which flange serves as a crosshead. The columns are
inclined inwards towards the ram and at their lower ends they are wide apart,
allowing ample room for the work to be entered and manoeuvred between them.
The main cylinder of the press moves along the ram and it is guided by guide
bars d d fixed by their upper ends to the crosshead a¹.
At their lower ends the guide bars d are fixed to girders e which connect the
columns near the ground but sufficiently high up to give headway for the work to
pass beneath them. There are guide grooves formed upon the exterior of the main
cylinder into which the guide bars are received.
The upper forging block f is carried at the lower end of the cylinder and the
lower forging block g is immediately beneath supported upon the foundation girders
or lower crosshead h h.
To lift the main or forging cylinder two other or auxiliary cylinders ii are
attached to it one on either side and these receive within them upright rams k k
which at their lower ends are fixed upon the girders e connecting the columns.
Water under pressure is supplied to these auxiliary cylinders and so the main cylinder
with the upper forging block is lifted.
When the downward stroke of the press is required to be made for the purpose
of compressing the work between the forging tools, water under pressure is admitted
to the main cylinder.
The cylinders i i may be in constant communication with an accumulator from
which also water is supplied to the cylinder c when required by opening a suitable
valve. The same valve serves to permit the escape of water from the cylinder when
the upward movement of the forging block f is required.
Figures 3 to 6 show another forging press constructed in accordance with my
invention.
Figure 3 is a front elevation, Figure 4 is a side elevation, Figure 5 is a plan of
the upper part and Figure 6 is a horizontal section on the line 6-6 in Figure 3. In
the press here shown a is the inverted ram. b b are the columns, c the main cylinder,
f and the forging blocks, hh the foundation girders or lower crosshead as in the
press previously described but the construction is modified by placing the columus bb
upright and they then serve as guides for the main cylinder c as it moves up and
down.
Small hydraulic cylinders upon the base girders at diagonally opposite

page_text: corners by means of their rams m m support the main cylinder. When water is
allowed to escape from the small supporting cylinders the main cylinder with the
upper forging block f descends. Water is supplied from a tank to the main cylinder
during the downward stroke, it enters past a non-return valve at n.
The pressure
water is admitted to the cylinder to complete the stroke when the upper forging
block is in contact with the work by means of a suitable valve provided for the
purpose.
The return stroke is obtained by admitting pressure water to the small cylinders /
whilst water is allowed to escape from the main cylinder c into the tank.
In some cases I arrange two auxiliary cylinders o o one on either side of the main
cylinder, these can be used separately when a light pressure only is required or in
conjunction with the main cylinder for a heavy pressure. They must be provided
with separate valves if it be intended so to employ them.
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. A forging press with an inverted ram supported by columns and a main
cylinder carrying the upper forging tool receiving this ram within it and auxiliary
cylinders and rams lifting the main cylinder.
2. A forging press with an inverted ram having a flange at its upper end and
four inclined columns attached to this flange and supporting this ram; a main
cylinder carrying the upper forging tool receiving this ram within it; and lifting
apparatus for raising the main cylinder.
3. A forging press with an inverted ram having a flange at its upper end and
four inclined columns attach to this flange and supporting the ram; a main cylinder
carrying the upper forging tool receiving this ram with it and auxiliary cylinders
and rams lifting the main cylinder.
4. Forging presses substantially as described and illustrated by the annexed
drawings.
Dated this 25th day of June 1891.