Improvements in Hydraulic Wheel Bossing Presses.
Year: 1894

page_text: Date of Application, 4th Jan., 1894
Complete Specification Left, 4th Oct., 1894-Accepted, 10th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Hydraulic Wheel Bossing Presses.
We, THE PATENT SHAFT AND AXLETREE COMPANY LIMITED Engineers, of
Wednesbury, in the County of Stafford, and DUGALD CLERK, of Driffold Villa,
Manor Hill, Sutton Coldfield, in the County of Warwick, Engineer, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to hydraulic wheel bossing presses and its object is to
improve upon the construction of existing bossing presses in which two punches
come together within the boss and displace the hot metal forcing it to fill up the die
forming the boss.
In most of such presses at present in existence, the two punches come together
leaving a certain distance between them so that a fin or plate of metal is left which
requires to be subsequently punched out to complete the hole in the boss.
Our invention consists in a method of arranging one of the punches so that the
metal is displaced by the other or opposing punch operated by a powerful ram,
while the pressure brought to bear upon the first named punch is resisted by a
strong metal abutment disposed, however, in such manner as to leave the said punch
free to be forced through by a suitable hydraulic ram to cut out the metal fin left
between the punches.
In one mode of carrying our invention into effect we arrange a press with three
lower rams. The two outer rams act on a powerful crosshead and press the wheel
and wheel die against a top head suitably secured by pillars. The centre ram
carries the lower punch which is thrust up and diplaces the hot metal enclosed
within the dies and forces the metal to flow out and fill up the die, so as to surround
the wheel spokes when a cold spoke wheel is made, or weld with the spokes when a
hot spoke wheel is made.
The upper punch during this operation is held in position by a strong collar or
shoulder forming an abutment within a bored out hole in the top head.
This hole we form right through the head and above the head or forming part of it
we construct a hydraulic cylinder which may be smaller than the cylinder operating
the lower ram. In this cylinder we place a ram with a prolongation passing
through the aperture in the top head and pressing upon part of the upper punch.
When it is desired to force out the fin we admit pressure above the said upper ram
and force down the upper punch at the same time allowing the water to escape from
below the middle ram, so that the lower punch is forced down and the fin is forced
out of the boss so leaving a clear hole.
By this device we are enabled to arrange our top punch cylinder just of sufficient
diameter to give power enough to cut out the centre fin between the two punches.
It will be understood that the top collar or abutment resists the great upward
pressure from the large lower ram so that this pressure is not taken by the top
cylinder and the only function of the top cylinder is to punch out the fin as the
lower punch retreats.
The top piston is arranged with its lower surface in communication with the
accumulator so that it is withdrawn when the pressure from above is removed.
Suitable valves are provided to operate the top cylinder as well as the lower
cylinders.
It will be understood that our invention may be applied to any wheel bossing
press in which the wheel centre is placed on dies and a hot billet or a billet and

page_text: plates are placed in the press to be forced by the said press to form the wheel boss
by displacing the metal or otherwise forcing it into dies.
Dated this 1st day of January 1894.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Hydraulic Wheel Bossing Presses.
We, THE PATENT SHaft AND AXLETREE COMPANY LIMITED, of
Wednesbury, in the County of Stafford, Engineers, and DUGALD CLERK, of
Driffold Villa, Manor Hill, Sutton Coldfield, in the County of Warwick, Engineer,
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:-
Our invention relates to hydraulic wheel bossing presses, and its object is to
improve upon the construction of existing bossing presses in which two punches
come together within the boss and displace the hot metal, forcing it to fill up the
die forming the boss.
In most of such presses at present in existence, the two punches come together
leaving a certain distance between them, so that a fin or plate of metal is left which
requires to be subsequently punched out to complete the hole in the boss.
Our invention consists in a method of arranging one of the punches so that the
metal is displaced by the other or opposing punch operated by a powerful ram,
while the pressure brought to bear upon the first named punch is resisted by a
strong metal abutment disposed, however, in such manner as to leave the said punch
free to be forced through by a suitable hydraulic ram to cut out the metal fin left
between the punches.
Referring to the two accompanying sheets of drawings
Figure is an elevation part in section of a press arranged with our
improvements.
Figure 2 is a section showing the arrangement of abutment holding the top punch
in position.
Figure 3 is a separate side elevation of the hydraulic cylinder used to operate the
top punch.
Figure 4 is a transverse section of the said cylinder.
Figure 5 is a half plan corresponding to Figure 3.
In one mode of carrying our invention into effect (see Figure 1) we arrange a
press with three lower rams A' A' and B. The two outer rams A' A' act on a
powerful cross-head A. and press the wheel G and wheel die D against a top head H
suitably secured by pillars. The centre ram B carries the lower punch B which is
thrust up and displaces the hot metal of the billet C enclosed within the dies D D'
and forces the metal to flow out and fill up the dies so as to surround the wheel
spokes when a cold spoke wheel is made, or weld with the spokes when a hot spoke
wheel is made.
The upper punch E during this operation is held in position by a strong collar or
shoulder E Figure 2 forming an abutment within a bored out hole in the top
head H.
This hole we form right through the head and above the head or forming part of
it we construct a hydraulic cylinder F which may be smaller than the cylinder
operating the lower ram B. In this cylinder F we place a ram F¹ with a
prolongation F2 passing through the aperture in the top head H and pressing upon
part of the upper punch E. When it is desired to force out the fin we admit
pressure above the said upper ram F¹ and force down the upper punch E at the
same time allowing the water to escape from below the middle ram B, so that the

page_text: lower punch is forced down and the fin is forced out of the boss so leaving a
clear hole.
By this device we are enabled to arrange our top punch cylinder F just of
sufficient diameter to give power enough to cut out the centre fin between the two
punches B' and E. It will be understood that the top collar or abutment E' resists
the great upward pressure from the large lower ram B so that this
pressure
taken by the top cylinder and the only function of the top cylinder is to punch out
the fin as the lower punch B' retreats.
is not
The top piston or ram F¹ is arranged with its lower surface in communication
with the accumulator so that it is withdrawn when the pressure from above is
removed.
Suitable valves are provided to operate the top cylinder F by the passages F³ F*,
as well as the lower cylinders.
It will be understood that our invention may be applied to any wheel bossing
press in which the wheel centre is placed on dies and a hot billet or a billet and
plates are placed in the press to be forced by the said press to form the wheel boss
by displacing the metal or otherwise forcing it into dies.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A hydraulic wheel bossing press in which two opposing punches are employed
one of the punches having a collar or shoulder, to take the thrust of the boss
forming punch or plunger, and having a cylinder to punch out the fin of metal left
when the boss forming punch has been withdrawn, substantially as hereinbefore
described.
2. The hydraulic wheel bossing press herein before described with reference to
the accompanying drawings.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.