Improvements in Embossing and Punching Machines.
Year: 1893

page_text: Date of Application, 2nd Sept., 1893-Accepted, 24th Mar.,
1894
COMPLETE SPECIFICATION.
[Communicated from abroad by THE BABCOCK AND WILCOX COMPANY, of New
York, in the United States of America, Steam Boiler Manufacturers.]
Improvements in Embossing and Punching Machines.
I, WALLACE FAIRWEATHER, C.E., of 62 Saint Vincent Street in the City of
Glasgow, Chartered Patent Agent, do hereby declare the nature of this invention
and in what manner the same is to be performed as communicated to me to be
particularly described and ascertained in and by the following statement :-
The invention is adapted for use in the embossing and punching of the sides of
corrugated or serpentine tubular headers adapted for sectional steam boilers; the
embossing being effected through and opposite the tube holes made after the
header is formed, and preparatory to making the hand holes.
In order that others inay understand and practice the invention, I will first
proceed to describe a machine embodying the same and subsequently point out in
the claims its novel characteristics.
Referring to the accompanying drawings, in which similar characters of reference
indicate corresponding parts throughout,
Figure 1, is a front elevation of the machine.
Figure 2, a horizontal section on the line -x, Figure 4.
Figure 3, a horizontal section taken on the line y-y Figure 1.
Figure 4 a cross-sectional elevation taken on the line z-, Fig. 1.
Figure 5, a similar cross-sectional elevation, showing the parts in different
positions, and the platen in section.
Figure 6, a detail sectional view taken on the liue --¹, Figure 2.
Figure 7 an enlarged cross-section showing the header before it is embossed.
Figure 8, an enlarged cross-section showing the header after it is embossed, and
also sectionally showing the dies after the act of impression.
to 5 inclusive, showing
Figure 9, is a plan view on the same scale as Figures
the lower side of the press, and also including a longitudinal section of the same
on the line y-y'.
Figures 10 to 12 inclusive, are enlarged detail sectional views, showing various
hydraulic connecting and shutting off devices adapted to the channels of the press,
and
Figs. 13 and 14 are enlarged cross-sectional views of the dies and punch
extension.
Figure 15 is a similar view showing a modified formation of the embossed
hand hole.
A, represents the frame of the press; I supporting columns; C, the stationary
head;
and B, the movable head or platen actuated by hydraulic plungers 2. The
hydraulic plungers 2, are arranged in staggered series as expedient to distributing
the pressure as equally as possible throughout the platen B, and these plungers or
any desired portion of their number are actuated by the admission of water
through the channels 3, supplied by the tubes 4, Figures 2 and 10. Any of the
plungers 2, may be cut out of action by the insertion of a plug adapted to stop
off their channels as shown in Figure 11; the purpose being that of operating the
press to emboss only a portion of the header if desired. D, indicates the header
to be embossed and E, Figures 3 and 4, is a die carrier which may be moved
from the sill F, on to or off the platen B, by means of the auxiliary hydraulic
cylinder G, connected by the rods L'and cross head N, as indicated in Figure 3, or
he other suitable means.

page_text: In the upper part of the die carrier E, there are a series of rams 5, which may
be raised vertically by the hand levers 6, as shown in Figure 4. The upper dies
are composed of steel discs 7, corresponding with the inside contour to be embossed,
which are inserted through the open ends of the tube D, and approximately
centered by the squared pins 8, manipulated by rods 9. The lower ends of the
rams 5, are bored to fit the pins 8, as seen in Figures 5 and 8, and slots 10, are
provided in the sides of the rams adapted to receive the rod 9, so that the said
rams which exactly fit the bores 11, in the header, may be inserted therein to
accurately centre and abut upon the dies 7.
The lower die is composed of a steel plate 12, in the base of the die carrier E,
having holes 14, located and contoured to correspond to the relief side of the
embossment opposite the dies 7, and beneath the holes 11, in the header.
In the embossing operation, the header D, after being suitably heated is placed
on a table 20, (Fig. 4), in front of the die carrier and the upper dies or discs 7,
inserted into the open ends of the header; the squared guide pins 8 are then passed
down through the tube holes 11, by means of the rods 9, so that the said guide pins
rest in the discs 7. The rams 5, are then raised and the header placed in the die
carrier as seen in Figures 1, 3 and 4, and the said rams dropped in place through
the tube holes and over the guide pins 8, thus bringing the discs 7, all into a
concentric position with the holes in the die 12, beneath the header.
Water is
applied to the cylinder G, drawing the die carrier into the press as at Figure 5,
subsequent to which the platen B, of the press is advanced by the plungers 2, 2,
with the requisite pressure to emboss the header; the finished form appearing in
Figure 8.
In Figures 13 and 14, the machine is adapted to effect the embossing and
punching operations at a single stroke of the ram 5, the die 12 being thickened
and provided with a countersunk recess and aperture 14 that is extended through
the die carrier E. With this construction the die 7 is either made with an extension k,
in one piece, or with the extension in a separate piece, centred and held by the
extended pins 8, as shown, the die in its first movement assisting in performing
the embossing operation and punches the hand hole at the same time; the upper
part 7, of the die, completing the formation of the embossed seat as shown in
Figure 14.
As represented in Figure 15 a raised ring seat S for the hand hole cover may be
formed by means of a spreading piece S fitted on the ram and which is pressed
through the orifice punched in the header the die plate 12 being replaced by a
die 121 having an annular recess within which the spreader enters to form the ring
seat on the header by the movement of the ram.
Should it be desired to emboss a portion only of the series shown, the corre-
sponding dies 7, may obviously be omitted; the rams or crowns 5, corresponding
thereto remaining idle during the action of the remaining ones.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
I declare that what I claim is :-
1. In a machine for embossing tubular headers having a multiple die composed
of a perforated plate arranged exterior to the header, a co-operating forming disc
arranged with the header and independently acting retractable rams or crowns, with
means for operating the same separately or together, whereby one or a series of the
same may be operated at will, substantially as described.
2. In a machine for embossing tubular headers, a multiple die composed of a
perforated plate arranged exterior to the header, a co-operating forming disc
arranged within the header and a ram adapted for insertion through the tube holes
of the leader acting upon said disc, and means for centering said disc with the ram
when the latter is advanced substantially as described.
3. In a machine for embossing tubular headers, a perforated die exterior to the
header, a disc interior thereto, a hollow ram aligned with the said perforated die,

page_text: and provided with a pin to center the disc with the said perforated die and ram
when the latter is advanced, substantially as described.
4. In a machine for embossing and punching tubular headers, a throughway die
exterior to the header constructed with a marginal countersunk recess, a removable
differential disc adapted for insertion within the headers corresponding to the recess
and aperture of the exterior die, and a ram acting upon the interior disc, substan-
tially as described.
5. In a machine for embossing tubular headers, a die piece exterior to the
header constructed with an annular recess, a spreading die piece fitted within the
header and a ram acting on said spreader substantially as described.
Dated this 1st day of September 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.