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Патент USA US3087372

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April 30, 1963
H. GENIER
3,037,362
APPARATUS FOR EXTRUDING LATERAL NOZZLES 0N CYLINDRICAL BODY
2 Sheets-Sheet 1
Filed Dec. 1, 1959
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mm
TUE
NM
INVENTOR.‘
Henri Genier
Fm
BY
ATTORNEY
April 30, 1963
H. GENIER
3,087,362
APPARATUS FOR EXTRUDING LATERAL NOZZLES on CYLINDRICAL BODY
2 Sheets-Sheet 2
Filed Dec. 1, 1959
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INVENTOR.
V.
Henri Genier
ATTORNEY
Unite Sttes Patent ()1 ice
The features and advantages of the invention will be
made clearer by the description below of an embodi
ment of the device according to the invention, given solely
by way of example, with reference to the appended draw
3,087,362
APPARATIE FGR EXTRUDENG LATERAL
NOZZLES 0N CYLINDRICAL BODY
cox, Limited, London, England, a company of Great
Britain
5
ings, where
FIG. 1 is a partly broken-away side view of the de
vice in accordance with the invention, with the punch
Filed Dec. 1, 1959, Ser. No. 856,540
Claims priority, application France Dec. 4, 1958
7 Claims. (Cl. 78-63)
holder external to the tube to be worked, which is located
in its die;
10
This invention relates to an apparatus for forming
Patented Apr. 30, 1963
2
1
Henri Génier, Paris, France, assignor to Babcock & Wil
3,087,362
FIG. 2 is a view similar to that of FIG. 1, with the
punch holder inside the tube to be worked, and with a
lateral nozzles or stubs on a tube section, particularly a
punch-raising element located midway;
header section.
In a known method of ?tting a header with stubs, a
FIG. 2, showing various phases of the stub-forming
FIG. 3 ‘is a detail view on a larger scale according to
punch placed inside the header forces the wall metal of 15 process;
the tube outward so as to form a stub after the metal has
been heated at the point where said stub is to be located.
It is often necessary to cold pierce a starting hole at
FIG. 4 is a transverse section along line IV-—IV in
FIG. 3; and
FIGS. 5 and 6 show a detail of a punch and the recess
in the punch holder accommodating it, FIG. 6 being a
that point, and it frequently happens that after hot ex
trusion the starting hole and the punch are no longer 20 top view of said recess.
The bed 1 of a vertical hydraulic press 2 carries a
bottom die 3' designed to receive the tube 4 that is to
concentric as a result of expansion of the metal, so that
the individual stubs formed are not then of the same
height over the length of the tube.
be ?tted with stubs and consisting of a block with a
The object of this invention is a method of forming
semi-cylindrical groove 5 with horizontal axis. Vertical
stubs on a tube which does not have these drawbacks. 25 bores 7 are provided in the bottom of said groove to ac
It makes it possible to form simultaneously and by simple
commodate branching stubs, such as 8, which may be
means a row of stubs of uniform height on a tube that
are located at well-de?ned points on the tube to be pro
present on the tube 4 to be worked.
The vertical press 2 comprises as usual a movable platen
10 whose motion is guided by four upright posts 11
vided with stubs.
The invention also provides a device for practicing 30 located at the corners of a rectangle on bed 1 and at
tached at their upper end to a crossbeam 12. (To keep
said method. Simple to employ and economical in oper
the drawing uncluttered, only the two rear posts are
ation, it is very ?exible in use.
shown in FIG. 1.) Said crossbeam carries in its longi
The method of the invention for the formation of
tudinal axis two vertical cylinder 13 that are placed
lateral stubs on a tube section, and particularly on a
header, in which each stub is formed by extrusion of the 35 symmetrically about its center and are closed at the top.
In each of these, a piston 14 whose lower part bears on
previously heated tube metal under the action of a mov
the topside of movable platen 10 is free to slide. Ar
able inner punch associated with said stub, and in which
ranged at the center of the topside of crossbeam 12 is
the tube is held in an external die, is characterized pri
a cylinder 16 Whose inside cross-sectional area is smaller
marily by the fact that the metal is punched while in
contact with a ?xed plug and then squeezed into an an 40 than that of cylinders 13 and in which a piston 18 is
free to slide which at its upper end (not shown) carries
nular cavity provided around said plug in the die.
a swing bar to which studs integral with movable platen
In a preferred embodiment of a device in accordance
10 are ?xed (swing bar and studs not shown). Cylin
with the invention for the practice of said method, a
row of annular cavities is provided in the die surround
der 16 is permanently connected with a duct for a ?uid
ing the tube. A plurality of punches, each associated with 45 under pressure (not shown). The pressure of said ?uid
on the underside of piston 18‘ constantly tends to push
a cavity, are arranged in the radial recesses of a punch
said piston, and consequently the movable platen 10‘, up—
holder that is capable of being moved along the tube
ward. Cylinders 13 are connected, at will, with the same
source of ?uid under pressure through pipes 20, and when
inside the tube, with the axes of the punches coinciding 50 these cylinders are placed under pressure, the movable
platen is lowered against the force transmitted by piston
with the axes of the cavities.
18, the cross section of pistons 14 being considerably
In accordance with another feature of the invention,
larger than that of piston ‘18. All that need be done to
each cavity comprises a cylindrical plug forming a coun
cause platen 10 to rise, driven by piston 18, is to remove
ter-punch; and an axial bore for the passage of said plug
55 the pressure from the so-called down cylinders.
is provided in each associated punch.
Two crossplates 22 attached to the lower part of
When with this arrangement, and with the punch
movable platen 10 on both sides of its vertical longitu
holder located inside the tube, the punch moves toward
dinal plane of symmetry carry a top die 24 designed to
the cavity, the Wall metal of the heated tube is com
?t over tube 4 in bottom die 5, a semicylindrical groove
pressed between the counter-punch and the punch as
axis between two extreme positions, in one of which it
is wholly outside the tube whereas in the other it is
they approach each other and so doing pierce a hole in 60 ‘26 being provided in the underside of die 24. (Only the
rear crossplate 22 is shown in FIGS. 1, 2 and 3.)
said wall. The punch then forces the metal around the
The bottom of groove 26 presents as many identical
hole into the cavity. The hole, pierced hot, is abso
cylindrical recesses 28 as there are stubs to be ?tted to
lutely concentric with the cavity, so that the stub is of
uniform height.
the tube 4 to be worked, the axes of said recesses lying
3,087,362
3
4.
in the vertical plane which passes through the axis of
with a hole 63 of a diameter slightly larger than that
of a counter-punch 42, and an annular rim 64 is pro
vided around said central hole. The shank itself is
pierced with a hole of a diameter larger than that of
hole 63 and terminates in its lower part in an oblique
said groove (see FIGS. 3 and 4). The bottom of these
recesses 28 is pierced axially by a hole 34ft of a diameter
smaller than that of a recess 23 and leading to the
topside of die 24 between the crossplates 22. An ejector
32 consisting of a cylindrical body 34 of slightly less
than the diameter of recess 23 is located in the latter,
face 66 whose steepest line passes through the common
plane of the axes of the head and of the punch shank,
forming an acute angle with the generatrix of the shank
located in said common plane toward the axis of said
screw 37 is located in a radial threaded hole of shank 10 shank.
The punch holder 54- is introduced into tube 4 by
36, its head, which projects from said shank, preventing
moving the support 53 along the guide rod 52, a guide
the ejector from dropping down by abutting on die 24.
68 comprising at its entrance end a conical opening
To permit said screw 37 to be put in place, circular
designed to facilitate such introduction being provided
openings 38 are provided in the walls of crossplates 22
to face shank 36. A cylindrical cavity 40 is provided 15 in front of the tube. Said guide ‘68 may be displaced
longitudinally along the tube axis and constitutes an
in the underside of ejector 32. A cylindrical counter
adjustable stop for the punch holder, cooperating with
punch 42 is arranged at the lower part of each ejector
extended by a cylindrical shank 36 that is inserted in
hole 30 and extends above the topside of die 24. A
and comprises an enlarged head 43 that comes to be
seated in cavity 4i).
The counter-punch is secured in
a bearing surface 54a provided on the latter.
Proper
adjustment of said stop makes it possible to align the
the ejector by means of a screw 44 which passes through 20 axes of the punches and of the counter-punches oppo
sitely. The movement of the support between the two
the ejector wall and penetrates into the counter-punch.
The length of counter-punch 42 is such that when
extreme positions in which the punch holder is either
completely inside or completely outside of tube 4 may
be actuated hydraulically or by any other means.
and tube 4 is located between them, the lower end of
Fixed to the right of ‘bed 1, in the alignment of sup
said counter-punch comes to rest on the upper periphery 25
port 53 and punch holder 54, is the bed of a horizontal
of tube 4, with ejector 32 pushed all the way up in its
hydraulic press 70 comprising a cylinder in which a
seat 28.
piston 71 is ‘free to slide longitudinally in the direction
The crossbeam 12 of the vertical press carries in its
of the axis of the punch holder. Said piston is integral
longitudinal axis of symmetry at each end a descending
vertical column 46 (FIG. 1) which passes through an 30 with a platen carrying a rod 72 of which a portion is
rectangular in section and whose width and height, re
opening provided in movable platen it}. A horizontal
spectively, are equal to the width and depth of slot 55
ejector bar 48 is attached at both ends to the lower part
the two dies 3 and 24 are in contact with each other
in the punch holder. The left end of said rod comprises
of columns 46 so as to be located below platen 10 and
an oblique face forming a ramp 73‘ of such a gradient
between crossplates 22. The horizontal bottom of said
bar 48 is straight above the row of heads of ejectors 32. 35 that the upper surface of said inclined plane and the
underside 66 of a punch 60 in position in punch holder
A stop 50 with screw, capable of longitudinal displace
54 lie in parallel planes.
ment along the axis of grooves 5 and 26-—in other words,
Openings are provided in movable support 53 to permit
of tube -4—is located in a stop block 51 that is mounted
the rod 72 to pass through it. Rod 72 is likewise adapted
to the left of bed 1 opposite groove 5. Said stop 50
is designed to de?ne the position of the tube in accord 40 for sliding in slot 55 of the punch holder so that when
ramp 73 is moved from right to left (FIGS. 1 to 3),
ance with its length and to prevent the latter from shift
the punches 60 are successively raised by their inclined
ing in the dies upon introduction of a punch holder, as
faces 66.
will be shown further on.
The movement of piston 71 is actuated hydraulically,
Fixed to bed 1 on the right-hand side is a guide rod
52 whose axis is parallel to that of groove 5 and on 45 and the travel of the piston is such that with punch
holder 54 abutting by its bearing surface 54a on stop
which a movable support 53 is free to slide. Said sup
port is ?tted at its left end with a punch holder 54 con
sisting of a cylinder of a diameter very slightly smaller
68, the ramp is capable of completely raising the punch
60 that is located nearest to the stop 50 of the tube.
To ?t a tube 4, generally a steel tube, with lateral
than that of tube 4 being worked and coaxial with said
tube when the latter is clamped between the dies. Said 50 stubs, the tube is ?rst heated to, say, 900° C. in proximity
to the vertical press, whose movable platen 10 with top
support incorporates a longitudinal braking system com
die 24 is raised.
prising a vertical slot 55 that is open toward the top
The heated tube 4 is then put in place in the grooves
over the entire length of the punch holder. Moreover,
of the bottom die 3, and by admitting the ?uid under
vertical and radial cylindrical recesses 56 are provided
in the punch holder, and a cylindrical bore 58 of a 55 pressure into cylinders 13, the movable platen 10 is
lowered. The tube 4- is thus clamped tight between the
diameter slightly larger than that of the recess, and sub
two dies, now brought together (FIG. 1).
stantially equal to the inside diameter of the stub or
The punch holder 54, carrying as many punches 60 as
nozzle to be formed, is provided at the entrance to each
there are stubs to be formed, is then introduced into the
recess 56 over a portion of its height, the axis of said
bore being slightly displaced toward the right relative 60 tube 4 until it abuts on stop 68, which has been set so
to the axis of the corresponding recess 56 in the vertical
that the axes of the punches and of the counter-punches
coincide. Introduction of the punch holder is facilitated
by the conical opening of said stop 68, which, as was
pointed out, is arranged ‘at the entrance to the tube.
Admission of the fluid under pressure into the cylinder
58 corresponds to the spacing between the axes of two 65
of the horizontal press causes piston 71 -to advance, that
consecutive recesses 28 in top die 24.
is, it causes rod 72 to penetrate into slot 55 of punch
A punch 60 (see FIGS. 4 and 5) is designed to be
plane of symmetry of the punch holder (see particularly
FIGS. 5 and 6).
The spacing between the axes of two consecutive bores
holder 54. In the course of this movement, the ramp
inserted in each recess 56 of punch holder 54. Each
73 comes successively in contact with each of the in
punch comprises a cylindrical shank 61 of a diameter
slightly smaller than the diameter of recess 56, sur 70 clined faces 66 of punches 60 ‘and progressively and suc
cessively raises each of these (FIGS. 2 and 3). The rim
mounted by a head 62 whose topside is curved and
64 of :a punch is ?rst brought into contact with the inside
whose axis is oifset relative to the axis of shank 61 in
wall of tube 4, then the softened metal of said wall is
the same manner that the axis of bore 58 is offset with
forced toward the counter-punch 42 facing it. The
respect to the axis of recess 56. Said head, which is
of the same diameter as bore 53, is pierced in its center 75 punch in question continues to be raised as a function
3,087,362
6
an offset section on‘ the end of said punch having a con
of ramp advance, with the head of the punch steadily
drawing closer to the counter-punch, and with the de
?guration and dimensions corresponding with those of
formed metal tending to occupy the volume of recess 28
which surrounds the counter-punch. The metal zone di
the interior of said nozzle, and means for forcing said
punch through the wall of said tube and around said
rectly beneath the counter-punch then is shaped by the
action of punch against counter-punch until the latter
penetrates into the hole 63 in the head, thus piercing the
tube-wall metal. As the punch is raised further, its head
counter punch to form said nozzle.
'
3. Apparatus for forming nozzles in a tube comprising
a die embracing the exterior surface of said tube, means
de?ning an opening through said die and having an inter
ior wall con?guration‘ corresponding with the desired
60 squeezes the metal against the wall of recess 28, with
the metal tending to ?ll all of the free space until the 10 exterior con?guration and dimensions of a nozzle, a coun
ter punch projecting through said opening in substantially
?nal position of the punch is reached and the rim 64 of
coaxial relationship therewith, means ‘for limiting exterior
the head abuts against the bottom of the ejector. The
movement of said counter punch relative to said die,
deformed metal is then distributed around the punch and
means for positioning a hollow punch within said tube,
externally ‘assumes the shape of cavity 28, leaving a stub
80 (FIG. 3) whose inside diameter is equal to the diam 15 the exterior con?guration and dimensions of said punch
corresponding with those of the interior of said nozzle,
eter of the head of the punch.
and means for forcing said punch through the wall of
When the ramp has raised all punches 60, with each of
said tube and around said counter punch to form said
them thus producing a stub on tube 4, it is moved back,
nozzle.
whereupon punch holder 54 is Withdrawn from the tube.
4. Apparatus for forming nozzles in a tube comprising
When the admission of fluid under pressure into cylinders 20
a die embracing the exterior surface of said tube, means
13 is stopped, the upward pressure exerted permanently
de?ning an opening through said die and having an in
on piston 18 causes the movable platen 10 with top die 24
to be raised.
terior wall con?guration corresponding with the desired
exterior con?guration ‘and dimensions of a nozzle, a coun
The punches 60 are then recovered 25 ter punch projecting through said opening in substantially
coaxial relationship therewith, means for positioning a
and put pack into their seats in the punch holder. It will
punch within said tube, the exterior con?guration and di
be noted that this recovery is made easy by the fact that
mensions of said punch corresponding with those of the
while the punches after formation of the stubs are mated
interior of said nozzle and having an opening there
with the corresponding counter-punches so that they are
through with .a con?guration and dimensions substan
not readily accessible, the bottom of the ejector bar strikes
tially the same as the exterior of said counter punch, and
against the heads of the ejectors as movable platen 10
The tube 4, ?tted with stubs 80, may then be removed
from bottom die 3.
means for forcing said punch through the wall of said
tube "and around said counter punch to form said nozzle.
5. Apparatus for forming nozzles in a tube comprising
emerging from recess 28 in the die, may be readily dis
35 a die embracing the exterior surface of said tube, means
engaged from the corresponding counter-punch.
de?ning an opening through said die and having an in
The machine is then ready for a new operating cycle.
terior wall con?guration corresponding with the desired
Such a device makes it possible to form branching stubs
exterior con?guration and dimensions of a nozzle, a coun
on a tube section at a high rate. The various operations,
ter punch of reduced cross-section within said opening
such as lowering the top die, inserting the punch holder,
raising the punches, withdrawing the punch holder and 40 and substantially coaxial therewith and extending sub
stantially to the exterior surface of said tube, a longitudi
raising the top die, may of course be performed fully
nally slotted mandrel having an exterior dimension sub
automatically-hydraulically, pneumatically or electri
stantially equal to the inner dimensions of said tube
cally, for example.
whereby the mandrel can be inserted into said tube,
This invention should not be deemed to be limited to
the embodiment described and illustrated as it includes 45 means for positioning a punch within the slot of said
rises, with each ejector descending into its recess 28, thus
dislodging the punch associated with it, which, after
mandrel, the exterior con?guration of said punch corre
such variant embodiments as may be constructed with
sponding with that of the interior of said nozzle, and
out departing from the scope of the invention. Speci?
means for forcing said punch through the wall of said
cally, lateral stubs might be ?tted to a tube in several
tube and around said counter punch to form said nozzle.
radial planes of the tube by modifying the setup of dies
6. Apparatus for forming nozzles in a tube comprising
and punches. Similarly, stubs inclined relative to the 50
a die embracing the exterior surface of said tube, means
normal of the tube axis might be provided, with the coun
de?ning an opening through said die and having an in
ter-punch possibly arranged off center in the die cavity,
terior wall con?guration corresponding with the desired
vand so forth.
exterior con?guration and dimensions of a nozzle, a coun
What is claimed is:
1. Apparatus for forming nozzles in a tube comprising 55 ter punch within said opening and substantially coaxial
therewith, a longitudinally slotted mandrel having an ex
a die embracing the exterior surface of said tube, means
terior dimension substantially equal to the inner dimen
de?ning an opening through said die and having an in—
sions of said tube whereby the mandrel can be inserted
terior Wall con?guration corresponding with the desired
into
said tube, means for positioning a punch within the
exterior con?guration and dimensions of a nozzle, a
counter punch of reduced cross-section projecting through 60 slot of said mandrel, the exterior con?guration of said
punch being greater than the width of said slot and cor
said opening in substantially coaxial relationship there
responding with those of the interior of said nozzle, the
with, means for positioning a hollow punch within said
inner end of said punch having an oblique surface, and
tube, the exterior con?guration and dimensions of said
means for forcing said punch through the wall of said tube
punch corresponding with those of the interior of said
nozzle, and means for forcing said punch through the 65 and around said counter punch to form said nozzle in
cluding a member having an inclined end portion and
wall of said tube and around said counter punch to form
operable in the slot of said mandrel to force said punch
said nozzle.
outwardly of the tube during movement of said member
2. Apparatus for forming nozzles in a tube comprising
longitudinally of said tube.
a die embracing the exterior surface of said tube, means
7. Apparatus for forming nozzles in a tube comprising
de?ning an opening through said die and having an in 70
upper and lower dies embracing the exterior surface of
terior wall con?guration corresponding with the desired
said tube, means de?ning an opening through the upper
exterior con?guration and dimensions of a nozzle, a coun
of said dies and having an interior wall con?guration
ter punch of reduced cross-section projecting through said
opening in substantially coaxial relationship therewith,
corresponding with the desired exterior con?guration and
means for positioning a hollow punch within said tube,
dimensions of a nozzle, a counter punch within said open
3,087,362
7
ing and substantially coaxial therewith, means for limit
ing exterior movement of said counter punch relative to
said die, said counter punch having a shank of reduced
cross-section area extending beyond said upper die, means
for positioning a punch within said tube in radial align
ment with the opening of said upper die, the exterior con
?guration andv dimensions of said punch corresponding
with those of the interior of said nozzle, and means for
forcing said punch through the wall of said tube and
around said counter punch to form said nozzle.
References Cited in the ?le of this patent
UNITED STATES PATENTS
Chal?eld ____________ __ July 11,
Sherman _____________ __ May 9,
1911'
1939
FOREIGN PATENTS
France ______________ __ Oct. 18,
Belgium _____________ __ Apr. 11,
Great Britain _________ __ ‘Oct. 15,
1956
1958
1958
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