Improvements in Machines for Punching, Stamping, and Flanging Metals.
Year: 1894

page_text: Date of Application, 13th June, 1894-Accepted, 11th Aug., 1894
UOMI LEIN CI DOITICATION
[Communicated from abroad by THE BABCOCK & WILCOX COMPANY, of New
York, in the United States of America, Steam Boiler Manufacturers.]
Improvements in Machines for Punching, Stamping, and Flanging
Metals.
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 :-
This invention embodies various novel elements which are applicable to machines
for the manufacture of wrought metal drum-heads, and in order to enable others
skilled in the art to which this said invention appertains to understand and use the
same, I will proceed to describe the various details of its construction, explain its
operation, and point out in the appended claims its novel characteristics.
Referring to the accompanying drawings
Figure 1 is a side elevation in preparatory position.
Figure 2 a front sectional elevation taken on the line xx, Figures 1 and 4 in
preparatory position.
Figure 3 a partial sectional side elevation taken on the line y-y, Figures 2, 4,
and 11, in flanging position.
Figure 4 a horizontal section taken ou the line -, Figures 1 and 2.
Figure 5 a horizontal section taken on the line a¹-, Figures 2 and 3.
Figures 6, 7, and 8 are sectional detail views showing the different positions
respectively of punching, inserting the stiffening collar, and pressing or forming,
taken in planes of section corresponding to the plane of section in Figure 2.
Figure 9 is an enlarged sectional detail view of the dies, corresponding in position
to Figure 8 of pressing or forming, taken in a plane of section indicated by the
line y-y in Figures 4 and 11.
Figure 10 is an enlarged sectional detail view of the dies corresponding in position
to Figure 3, of flanging, and taken in a plane of section indicated by the line y-y,
in Figures 2, 4, and 11.
Figure 11 is an enlarged horizontal section taken on the line 21-21, Figure 10,
showing an inverted view of the parts.
Figure 12 is a detail view showing one of the segments of the casting-off collar
inverted.
Figure 13 is an enlarged sectional detail view of the dies taken on the line --,
Figures 4 and 11, showing the manner in which the work is cast off when completed.
I is the base of the press; 2 the head of the press; 3 the pillars or tie rods;
4 the upper or fixed platen; 5 the lower or movable platen; 6 the upper forming
die which, when active, occupies an advanced position upon the upper platen 4, as
in Figures 1, 2, 6, 7, 8, 9, but when inactive is permitted to retire toward the
platen 4, as in Figures 3 and 10; 7 the lower forming die permanently secured to
the movable platen 5; 8 is the flanging collar permanently fixed to the upper
platen 4; 10 is the male punching die which may be connected or disconnected
with the upper platen 4; 11 is the female punching die which is connected to an
independent head 12, provided with means for its advancement, as in Figures 2
and 6 or retraction in the platen 5, as in Figures 3, 7, 8, 9, 10, and 13. The
enlargement 13 of the male punching die 10 serves to form and inwardly flange the
man-hole in plate 14, as in Figures 3, 8, 9, 10, after it has itself been formed over
the stiffening collar 15, previously formed by another machine and inserted as in
Figure 7 in the recess 16 (Figure 6), provided therefor in the lower forming die 7.
[Price 8d.1

page_text: 20 are movable interposing blocks which are advanced by hydraulic plungers 21
in cylinders 22 controlled by introduction of pressure applied through pipes 60.
The interposing blocks 20 are retracted by constant water pressure from pipe 61
within said plungers 21, between the same and the stationary pistons 23; the
application of pressure for effecting the advancement of the said interposing blocks
being effected at will through the agency of suitable valves. The interposing
blocks 20 are always interposed between the flanging collar 8, and the upper fixed
platen 4, and said interposing blocks when advanced toward one another occupy
an interposed position between the upper forming die 6, and said platen 4, as in
Figures 1, 2, 6, 7, 8, 9, but when retracted permit the upper forming die 6 to retire
within the flanging collar 8, so as to rest directly against the upper platen 4, as in
Figures 3, 5 and 10. The edges of the interposing blocks 20 which are adjacent
when they are brought together; are provided with tongues 24 which fit into
gains 25 in the shank 26 of the punching and manhole forming die 10 and 13.
The punching and manhole forming die 10, 13, is raised up against the forming
die 6, as in Figures 1, 2, 6, 7, and the said blocks 20 then brought together,
securing the said die 10, 13, in its suspended position preparatory to the first step
of operation.
30, Figures 2 and 3, is the hydraulic cylinder for operating the forming and
flanging mechanism provided with a plunger 31 carrying the lower platen 5 on its
base plate or platen proper 32.
The plunger 31 serves also as a hydraulic cylinder within which the lifting
ram 33 is operated, carrying the head 12 which supports the female punching
die 11 to be operated independently of the forming die 7. The female punching
die 11 is provided beneath it with a transverse mortise .34 for the removal of the
pieces punched out.
40 is a segmental casting-off collar, which is kept locked in position on the
forming die 7 by means of keys 99 during the shaping operation said collar being made
in four segments, as indicated in Figures 4 and 11, and tapered interiorly so that
when raised (after the keys 99 have been removed) as in Figure 13, it may contract
to release the work. The segments of said collar are slightly separated at their
joints when depressed into formning position, so as to permit said contraction when
raised.
41 represents hydraulic plungers operated within cylinders 42 to raise and lower
the segments of, the collar 40. The movements of said plungers being effected by
any suitable hand valves.
The hydraulic pressures in cylinders 30 and 31 and the motions of their respective
plungers determined thereby, are controlled by any usual or suitable character of
valves applied to pipes 50 and 51, which, being well known to the art, will not
require specific description herein.
The operation of the machine is as follows:-
The male punching die 10 is raised by the lifting ram into the position shown in
Figures 1 and 2, and the interposed blocks 20 advanced between the forming die 6,
and platen 4, until their tongues 24 enter the gains 25 in the shank 26, of said
punching die 10, holding the same securely in position for punching. The platen 5,
being in its retracted position, the blank-plate 14 is inserted as in Figure 2. Water
is introduced into the cylinder 31, elevating the female punching die 11, so as to
punch the plate as in Figure 6. After punching the manhole opening through the
sheet the two rams can then act independently. The female die 11 is then retracted
as in Figure 7, leaving the plate 14 to adhere to the punch 10. The stiffening
collar 15 is now inserted in the recess of the forming die 7, as in Figure 7, and
pressure applied to the cylinder 30, advancing the platen and forming die 7
within which the die 11 is now retired into an inactive position. The advance
motion of the forming die 7 against the forming die 6 first forces the plate 14 over
the enlargement or shoulder 13 of the punch 10 so that the margins of the manhole
in the plate 14 are formed upon the stiffening collar 15 as in Figure 8; the
abutment of the forming die 7 against the forming die 6 convexing the plate 14.

page_text: The pressure in cylinder 30 is now released sufficiently to allow the platen 5 to
partially retract and relieve the compression upon the forming die 6. The
interposing blocks 20 are then retracted to the position shown in Figures 3 and 5,.
and the manhole punching and forming die 13 permitted to drop through the
manhole into an inactive position, as in Figures 3, 8, 9, and 10. Pressure is again
applied to cylinder 30 advancing the platen 5, so that the forming die 7 abutting
against the forming die 6, now released, will push the same into the flanging
collar 8 while the latter remains in its fixed position, and forms the flange on the
perimeter of the plate 14, as in Figures and 10; the flanging collar 8 being
guided concentrically with the work by means of guides 70.
Pressure being again released from cylinder 30, the platen 5 is permitted to
retract, leaving the work on the forming die 7, which work is afterwards ejected
by the segmental collar 40 in the manner aforesaid, and as illustrated in Figure 13.
Having now particularly described and ascertained the nature of the said
invention, 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 punching, stamping, and flanging metals, the combination of
the punching dies, the forming dies, and means for operating said punching dies in
advance of the forming dies, substantially as specified.
2. In a machine for punching, stamping, and flanging metals, the combination of
a stationary platen, the forming die supported thereon, the punching and forming
die movable relatively to said forming die, the movable blocks for securing the
punching die in a fixed position relatively to the said forming die, the movable
female die and the movable forming die, substantially as specified.
3. In a machine for punching, stamping and flanging metals, the combination of
the forming dies, the punching dies, the interposing blocks for holding the male
punching die in an operative position, and means for moving said interposing blocks
in both directions, substantially as specified.
4. In a machine for punching stamping and flanging metals, the combination with.
forming dies of the manhole punching and forming dies, means for holding one of
said punching and forming dies in an operative position, means for advancing the
other of said punching dies, and a contractable casting-off collar, substantially as
specified.
5. The combination with the fixed forming die and the fixed punching die, of the
movable forming die, the movable punching die, and the casting-off collar consisting
of segments internally tapered and surrounding the movable forming die, substantially
as specified.
6. In a machine for punching stamping and flanging metals, the combination of
a fixed platen, a flanging collar carried thereby, a forming die movable in the
flanging collar, the male punching die, the movable platen, the forming die carried
by said movable platen, the female punching die movable within the last named
forming die and in advance of said forming die, substantially as specified.
7. The combination with the forming dies, of the punching die having the stem
portion provided with gains, the interposing blocks and means for moving said.
interposing blocks into engagement with the gains of said stem portion, substantially
as specified.
8. The combination with the upper forming die and the male punching die, of
the movable platen, the forming die carried thereby, the cylindric plunger operating
in a hydraulic cylinder and carrying said platen, the lifting ram operating in said.
cylindric plunger, and the female punching die carried by said ram, substantially
as specified.
Dated this 12th day of June 1894.
WALLACE FAIRWEATHER,
62, Saint Vincent Street, Glasgow.