New or Improved Machine for Stamping-up Sheet Metal.
Year: 1889

page_text: Date of Application, 28th Mar., 1889
Complete Specification Left, 24th Dec., 1889-Accepted. 25th Jan., 1890
PROVISIONAL SPECIFICATION.
New or Improved Machine for Stamping-up Sheet Metal.
1, PAUL MALLET, of 91 rue Oberkampf, Paris, in the Republic of France, Engineer,
do hereby declare the nature of the said invention to be as follows:-
The object of this invention is to produce a machine that will stamp up large sheets
of metal into deep hollow ware with rims of any desired width.
The stamping machine, properly so called, is constructed with devices by which the
edges of the sheet to be stamped up, are squeezed. between, two surfaces pressed
together by an elastic pressure, adjusted exactly to the effect to be produced, that is to
say, just such as will allow the edges of the sheet to be released regularly and in
proportion as the plunger or punch enters the.matrix.
The general arrangement and details of construction of the machine are such as to
give to the punch, and to the matrix, successive movements..whereby the dimensions
of this part of the machine, and the stroke of the punch are reduced, and uniformity
of action secured whatever the irregularity of the conditions of the work while the
stamping, or striking up of sheets of metal of large, diameters and, great thicknesses
without previous choice or selection.is rendered possible.
In the drawings hereto annexed, Figure 1. is a sectional elevation of a machine
constructed in accordance with my invention, taken on the line 1-2 of Figure 2;
Figure 2 a plan of same; Figure 3 an end elevation; Figure 4 a horizontal section,
taken on the line 3-4 of Figure 1; and Figure 5 a portion of Figure 1 with the
parts in a different position.
A is a bedplate firmly fixed on a suitable foundation, and furnished with bearings
for the shafts B, C and D. EE are two side frames bolted to the bedplate, and
connected at their upper ends by the cross piece E2. These side frames are furnished
with slide guides in the middle to guide the matrix and the head of the punch during
their up and down movements.
The matrix M is placed on a lower table F which, in working, is, raised by two
cams G G fixed on the shaft D.
The punch or die P is fixed at the end of a screw V which is held in position
in a cross head. H on to the ends of which take the upper, ends of, two connecting
rods II. The lower ends of these connecting, rods take on to crank pins ; j
forged with plates forming one piece with the shaft D, and on which are,, fixed the
spur wheels KK. The cross head, H receives its necessary vertical rectilinoar
movements from these spur wheels, crank pins and connecting rods.
LL' are lugs cast with or connected to the upper parts of the side frames E E¹.
NN are other similar lugs at the. lower parts of the said frames. The lugs N N are
provided with rotating nuts into which the threaded parts of the rods 00, 0' 0¹ are
screwed, the upper ends of the rods 001 being, guided in the, upper, lugs L L'.
These rods are formed with rectangular..frames QQ. at a certain, height to receive
the ends of the blade, springs RR, to which the squeezing or pressing table T is
connected.
The table: D.has a hole formed in it centrally with the axis of the punch or die P,
which passes through it freely as well as through a ring U, fitted below the table for
the purpose hereinafter explained.
B is the driving shaft, it carries outside the bed plate the, two, 'flywheels, a a¹ and
the driving pulley a³, and, inside the same, the two loose, pinions. intended to
drive two twin.spur, wheels cc keyed on the intermediate shaft C. On the shaft B
are also placed the two- hollow friction cones d d containing the two corresponding
cones e e fitted therein and sliding on a feather on the, shaft B. The cones d dare
cast with or otherwise connected to the pinions b.b.

page_text: The connection of the cones e e¹ with the cones d.d and their disconnection there-
from are effected by means of a lever which, by means of the links ff, actuates the
crank arm g' fixed on a shaft g. On this shaft are two screws working in two
nuts 92 g furnished with studs or pins which take into forks on the ends of two
levers. These levers act upon the collars of two sleeves formed on the moveable
cones e e¹. The partial rotation of the screws are thus transformed into rectilinear
movements of the cones e e¹ so as to put them into or out of gear with the cones d d¹
as may be required.
The disconnection of the continuously rotating fly wheel shaft from the other
operating parts of the machine is effected automatically but the connection of the said
shaft therewith is effected by hand, when the stamped or struck up article is removed
from the machine and a fresh blank supplied in its place. Motion is conveyed from
the spur wheels c c to the spur wheels K K on the shaft D by two pinions ¹ keyed
on the ends of the shaft Coutside the bed plate.
As already stated the shaft D effects the upward movement of the matrix by
means of the cams G G¹, and the up and down movements of the cross head H, to
which the punch or die P is attached, by the crank pins jj and connecting
rods I [¹.
The height of the punch or die P in relation to the pressing table T can be
regulated at pleasure. For this purpose the punch or die P is fixed to the end of a
screw V screwed into a nut k fitted into the cross head H, and secured therein by a
recessed shoulder and a nut and check nut. This method of securing the nut k
enables it to be turned round to regulate the height of the punch or die P, by means
of a hand wheel m, the axis of which carries an endless screw which gears with
worm wheel teeth formed on the shoulder or flange of the nut k. The upper part of
the screw V is smooth and is guided by a feather in the cross piece E³.
The table T is pressed downwards by the springs R R with a pressure which
can be regulated by the nuts and check nuts S S¹. The position of the table T
is regulated by hand by turning one or other of the hand.wheels n which, by
means of the mitre wheels n' (Figure 4), rotates four endless screws n² gearing with
worm teeth on the nuts turning in the lugs N N'. As already explained these nuts
are traversed by the screwed parts of the rods 0 0¹ consequently their rotation to the
right or left effects the raising or lowering of the said rods 0 0 and of the .table T.
When the correct position of the table has been obtained it is locked in that
position by means of the nuts and check nuts q g' screwed against the nuts in the
lugs N N
On the lower table F is placed the matrix M, the shape and dimensions of which
are adapted to the section of the articles to be produced. The hollow in the matrix
corresponds to the punch or die P. In the horizontal part of the edge round the
matrix is formed a recess in which is placed the metal blank to be struck or stamped
up. The annular surface of this recess has for counterpart the surface of the under-
side of the ring U fitted under the pressing table T. The blank is consequently
pressed between the ring U and the bottom of the recess in the edge of the matrix.
In the matrix M is fitted the false bottom furnished with the rod 7 serving as a
guide thereto by sliding in the fixed bearing s.
The action of the machine is as follows:-
After having regulated the pressure of the springs R R¹ and the position of the
pressing table T the machine may be set in motion.
The blank sheet of metal placed in the recess in the edge of the matrix rises with
the latter by the action of the cams G G¹ and the edges of the sheet are pressed
firmly by the ring U with a pressure dependent upon the tension of the springs R R¹
(see Figure 5). As soon as the table T has been lifted off the nuts S S₁ the pressure
ring U is applied all round the circumference of the blank to be shaped however
unequal the thickness of the piece of sheet metal may be. At this moment the punch
or die P descends and forces the metal into the matrix, the edges of the sheet being
gradually withdrawn from between the surfaces M. and U.
When the punch or die has effected the striking or stamping up of the piece of

page_text: metal it rises and the matrix M descends. The punch or die and the matrix then
remain stationary in consequence of the disconnection of the cones e e¹ from the
cones dd which is effected automatically as above explained.
The article formed is pushed out of the matrix as the latter descends, by means of
the false bottom, the normal position of which is a little above that which it occupies
at the completion of the striking up operation.
Dated this 28th day March 1980
COMPLETE SPECIFICATION.
New or Improved Machine for Stamping-up Sheet Metal.
1, PAUL MALLET of 91 rue Oberkampf, Paris in the Republic of France, Engineer
do hereby declare the nature of the said invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the drawings filed with my Provisional
Specification, that is to say :-
The object of this invention is to produce a machine that will stamp up large sheets
of metal into deep hollow ware with rims of any desired width.
The stamping machine, properly so called, is constructed with devices by which the
edges of the sheet, to be stamped up, are squeezed between two surfaces pressed
together by an elastic pressure adjusted exactly to the effect to be produced, that is to
say, just such as will allow the edges of the sheet to be released regularly and in
proportion as the plunger or punch enters the matrix.
The general arrangement and details of construction of the machine are such as to
give to the punch, and to the matrix, successive movements whereby the dimensions
of this part of the machine and the stroke of the punch are reduced and uniformity
of action secured, whatever the irregularity of the conditions of the work, while the
stamping, or striking up, of sheets of metal of large diameters and great thicknesses,
without previous choice or selection, is rendered possible.
In the drawings filed with my provisional specification, Figure 1 is a sectional
elevation of a machine constructed in accordance with my invention, taken on the
line 1-2 of Figure 2; Figure 2 a plan of same; Figure 3 an end elevation;
Figure 4a horizontal section taken on the line 3-4 of Figure 1, and Figure 5 a
portion of Figure 1 with the parts in a different position.
A is a bed plate firmly fixed on a suitable foundation, and furnished with bearings
for the shafts B, C and D-E E' are two side frames bolted to the bed-plate, and
connected at their upper ends by the cross piece E³. These side frames are furnished
with slide guides in the middle to guide the matrix and the head of the punch during
their up and down movements.
The matrix M. is placed on a lower table F which in working is raised by two
cams G G fixed on the shaft D.
The punch or die P is fixed at the end of a screw V. which is held in position in a
cross head H on to the ends of which take the upper ends of two connecting rods I I¹.
The lower. ends of these connecting rods take on to crank pins jj forged with plates
forming one piece with the shaft D, and on which are fixed the spur wheels K K.
The cross-head H receives its necessary vertical rectilinear movements from these spur
wheels, crank-pins, and connecting rods. L L' are lugs cast with or connected to the
upper parts of the side frames E E¹. N N' are other similar lugs at the lower parts
of the said frames. The lugs N N¹ are provided with rotating nuts into which the
threaded parts of the rods 80, 0' 0¹ are screwed, the upper ends of the rods 00¹
being guided in the upper lugs LL'. These rods are formed with rectangular
frames QQ at a certain height to receive the ends of the blade springs, R R¹ to
which the squeezing or pressing table T is connected.
The table T has a hole formed in it centrally with the axis of the punch or die P,

page_text: which passes through-it freely, as well as through a ring,U, fitted below the table for
the purpose hereinafter explained.
intended to drive
On the shaft B'are
two correspon ling
The cones dare
B is the driving shaft; it carries outside the bed plate the two fly wheels a a' and
the driving pulley a², and inside the same the two loose pinions
two twin spur wheels c c keyed on the intermediate shaft C.
also placed the two hollow friction cones containing the
cones e e fitted therein and sliding on a feather on the shaft B.
cast with or otherwise connected to the pinions bb
The connection of the cones e e¹ with the cones d d, and their disconnection there-
from, are affected by means of a lever which, by means of the links f¹², actuates
the crank aring fixed on a 'shaft g On this shaft are two screws working in two
nuts gg furnished with studs or pins which take into forks on the ends of two
levers. These levers act upon the collars of two sleeves formed on the moveable
cones e e¹ The partial rotations of the screws are thus transformed into rectilinear
movements of the cones e e¹ so as to put them into or out of gear with the cones d d¹
as may be required.
The disconnection of the continuously rotating fly wheel shaft from the other
operating parts of tlie machine is effected automatically, but the connection of the
said shaft therewith is effected by hand, when the stamped or stuck-up, article is
removed from the machine and a fresh blank supplied in its place.
Motion is conveyed from the spur wheels c c to the spur wheels K'K' on the
shaft D by, two pinions keyed on the ends of the shaft C outside the bed-
plate.
As already stated, the shaft D effects the upward movement of the matrix by
means of the cams G G₁, and the up and down movements of the cross-head H,
to which the punch or die P is attached, by the crank pins jj"and connecting
rods I I':
The height of the punch or die P, in relation to the pressing table T can be
regulated at pleasure. For this purpose the punch or die P is fixed to the end
of a screw V screwed into a nut k fitted into the cross-head H, and secured therein
by a recessed shoulder and a nut and check nut k¹. This method of securing the
nut k enables it to be turned round to regulate the height of the punch or die P,
by, means of a hand wheel m, the axis of which carries an endless screw which gears
with worm wheel teeth formed on the shoulder or flange of the nut k. The upper
part of the screw V is smooth and is guided by a feather in the cross piece E³.
The table T is pressed downwards by the springs RR with a pressure which
can be regulated by the nuts and check nuts S ST. The position of the table T
is regulated by hand by turning one or other of the hand wheels' n which, by
means of the mitre wheels n' (Figure 4), rotates four endless screws n² gearing
with worm teeth on the nuts turning in the lugs N N. As already explained these
nuts are traversed by the screwed parts of the rods 0 0¹ consequently their rotation
to the right or left effects the raising or lowering of the said rods 001 and of the
table T. When the correct position of the table has been obtained it is locked in that
position by means of the nuts and check nuts q q₁ screwed against the nuts--in the
lugs N N
On the lower table F is placed the matrix M, the shape and dimensions of which
are adapted to the section of the articles to be produced. The hollow in the matrix
corresponds to the punch or dié P. In the horizontal part of the edge 'round the
matrix is formed a recess in which is placed the metal blank x to be struck or
stamped up. The annular surface of this recess has for counterpart the "surface of
the under side of the ring U fitted under the pressing table T. The blank is con
sequently pressed between the ring U and the bottom of 'the recess in the edge of the
matrix. In the matrix M is fitted the false bottom furnished with the rod serving
as a guide thereto by sliding in the fixed bearings.
The action of the machine is as follows:-
After having regulated the pressure of the springs R R and "the position of the
pressing table T the machine may be set in motion.

page_text: pressure
The blank sheet of metal æ, placed in the recess in the edge of the matrix, rises
with the latter by the action of the cams G G¹, and the edges of the sheet are pressed
firmly by the ring U with a pressure dependent upon the tension of the springs R R¹
(see Figure 5). As soon as the table T has been lifted off the nuts S S¹ the
ring U is applied all round the circumference of the blank to be shaped, however
unequal the thickness of the piece of sheet metal may be. At this moment the punch
or die P descends and forces the metal into the mairix, the edges of the sheet
being gradually withdrawn from between the surfaces M. and U.
When the punch or die has effected the striking or stamping up of the piece of
metal, it rises and the matrix M descends. The punch or die and the matrix then
remain stationary in consequence of the disconnection of the cones e e¹ from the
cones d d which is effected automatically as above explained.
The article formed is pushed out of the matrix as the latter descends, by means of
the false bottom r, the normal position of which is a little above that which it occupies
at the completion of the striking up operation.
Having now described the nature of the said invention, and in what manner the
same is to be performed, I declare that what I claim is :-
First The new or improved machine for stamping-up sheet metal, consisting of
the bed plate A, the side frames E E' forming guides for the matrix and die, the
gearing arranged on the bed-plate A for transmitting motion to the various parts;
the matrix M actuated by the cams G G¹; the pressure table T acted on by the
adjustable springs R R₁; the mechanism for carrying and actuating the die consisting
of the connecting rods I I', the cross head H and the carrying screw V adjustable in
the said cross-head, all combined, arranged and operating as hereinbefore described,
and illustrated in the aforesaid drawings.
Second-The combination of the vertically acting matrix M with the spring pressure
table T, for holding the edges of the metal blank, with a yielding pressure, between
the edge of the matrix M and the ring U during the descent of the die P, as herein-
before described, and illustrated in the aforesaid drawings and for the purpose set
forth.
Third The means herein before described, and illustrated in the aforesaid drawings,
for regulating the position of the die P with reference to the cross head H.
Fourth The means hereinbefore described, and illustrated in the aforesaid drawings,
for regulating the position of the pressure table T.
Fifth The means hereinbefore described, and illustrated in the aforesaid drawings,
for regulating the tension of the springs R R¹ of the pressure table T.
Dated this 24th December 1889.
P. MALLET.
Per W. H. Beck,
11, Cannon Street, London, E.C., Agent.