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Патент USA US2113250

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April 5, 1938.
E. M. cAR'rwRlGHT
Filed Aug. 18, 193'?
5 Shee'ts-Sheet l
April 5, 1938.
Filed'Aug. 18, 1957
3 _Sheets-Sheet 2
April 5, 1938.
Filed Aug. 1S. 1937 '
s sheets-sheet s
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Patented Apr. 5, 1938
METHOD or mamma _nEnUc‘rNG-T’s
Eugene M. Cartwright, Narni wœdbury, om.,
assigner to Cline Brau Q Copper Co. Incorpo
rated, Waterbury, Conn., a corporation of
Application Anm: 1s, i937, serial No. 159km
5 Claims.
This invention relates to improvements in
methods of forming reducing-T’s.
One object of this invention is to provide an
improved method of forming reducing-T’s with
greater speed and consequent less cost.
Another object of this invention is to provide
an improved method of making reducing-T’s by
parts and steps are identiiied by specinc names
for convenience, but they are intended to be as
generic in their application as the prior art will
Referring to the drawings, the cup-shaped
blank 20 shown 'in Fig. 1 may be produced in any
suitable way, and is subjected to a series of op
which a reduced terminal of the T can be given erations to reduce it to the T-shaped form of
a greater reduction atv a single operation.
the blank 2| shown in Fig. 2. In performing this
A further object of this invention is to provide > series of operations, the lower end 22 of the blank 10
an improved method of forming reducing-T’s `2|l is given a series of bulging-out operations, as
without distorting the T’s out of shape due to the indicated by the broken line 23, and the blank
strain they are subjected to.
-is shortened as indicated bythe broken line 24.
With the above and other objects in view, as This series of operations for changing the blank
2lil into the blank 2| may be performed in ac 15
15 will appear to those skilled in the art from the
present disclosure, this invention includes all cordance with the disclosure of the application
features in the said disclosure which are novel Serial No. 141,936 of Franz B. Wendel, tiled May
over the prior art.
11, 1937, or the blank 2| may be produced in any
In the accompanying drawings, in which one other desired or known way. 'I'he blank 2| next
way is shown for illustrative purposes:
has its end-wall 25 cut oiI _ and has the thus
Fig. 1 is an elevational view partly in section opened run-end reamed out to produce the T 20
of a cup-shaped blank for use in making the T
blank 26 of Fig. 3 ready for operation in accord
shaped blank from which the reducing-T is to be ance with the present invention.
~ 'I'he press 21 has a press-bed 28 and a pair of
Fig. 2 is a view in elevation and partly in sec
spaced-apart upright-guides 28. The top or head 25
tion of the T-shaped blank before an end-wall of the press is not shown. - A die-bed 3|) is ñxedly
has been removed;
mounted upon the press-bed 28 in any suitable
Fig. 3 is a view similar to Fig. 2 with one end
manner. Resiliently yieldable means, such for
wall removed from one of the run-tenninals to example as an air cylinder pad 3| is located in an
opening 32 in the press-bed 28, and is normally
30 form the- T-blank;
Fig. 4 is a view similar to Fig. 3 after the closed
forced `upwardly against the bottom o'f the die
bed Why a piston (not shown) of an air cylinder
end run-terminal has been reduced;
Fig. 5 is a view similar to Fig. 4 of a ñnished
(not shown) which is normally in communication
male reducing-T after the end of the reduced run
with a source of supply of compressed air.
A mandrel 33 has a iiange 34 enga-ging against 35
35 terminal has been removed;
Fig. 6 is a view similar to Fig. 5 after all the the die-bed 30 and a screw-threaded ‘shank or »
terminals have been expanded to finished form to tang 35 screW-threadedly engaged in a threaded
form a female reducing-T;
hole in the die-bed 38. A backing-sleeve 36 is
Fig. '1 is a view in elevation of a portion of one slidably mounted upon the mandrel 33 and has
a base 31 normally resting upon a plurality of 40
40 form of press and die construction for carrying
out the present invention, with the T-blank thrust-rods 38, preferably four in number, which ~
shown in Fig. 3 omitted;
rods 38 extend through holes 39 in the die-bed 30 Fig. 8 is a sectional view taken on the line 8_8 and rest against the top of the air-cylinder
of Fig. '7 with the T-blank of Fig. 3 in position for pad 3|.
The mandrel 33 has air-relief hole 40 which in 45
4.5. the reducing operation;
Fig. 9 is a view similar >to Fig. 8, with the parts -tersects a. transverse air-relief hole 4| which by
of the press andA die at the end oi' the reducing connection through fiat portion» 44- is able to re
lease air through one or the other of holes 42,`
Fig. 10 is a view similar to Fig. 8, with the parts >43, depending upon the position of sleeve 36 rela
tive to mandrel 33.l Cross-bars 45 are secured to 50
50 of the press and die returned to their initial po
sition and with the reduced-T blank ready for the uprights 23, and abutments 46 are adjust
removal; and
Fig. 11 is a transverse sectional view taken on
the line II-II of Fig. 10.
In the description and claims, the various
ably'threadedly secured to the bars 45.
The slide 41 is mounted to slide in the uprights
or guides 29, and the closing-in or reducing-die
48 is secured to the under side of the slide 41.
The'slide 41 has a central hole 49 intersected by
a slot 50 which extends across through the slide
41. The reducing-die 48 has a central hole 5l
with an annular chamfered entrance 52 leading
UJI thereto. A knock-out or knock-out plunger 53
is slidably mounted in the hole 5| and has a
shank 54 detachably connected by a screw 55 to
a plug 56 which slides in the hole 49. The knock
out bar 51 extends transversely through a hole
10 58 in the plug 56 and may be ñrmly secured there
in, the opposite ends of the knock-out bar 51
being in position to engage the abutments 46.
In carrying out the method of making a, reduc
ing-T in according with the present invention,
15 a,> T-blank of the form shown at 26 in Fi'g. 3
has its open run-end 59 placed down over the
second terminal and add at least a portion of the
material of the said end-wall thereof to the re
duced tubular side-wall; and opening the end oi.' i
the now reduced second terminal of the T-blank.
2. The method of forming branch pipe-fittings Cil
having run-portions reduced at one end, com
prising: preforming a branch pipe-fitting blank
with open and closed run-ends; concentrically
arranging on a mandrel sized to correspond to
the desired reduced~ run-end, the run-portion
`of said blank with the closed end thereof sup
portably engaged by the end of said mandrel;
subjecting the closed run-end thus supported to
a drawing-down operation acting initially on the
closed run-,end to draw down a peripheral por
tion of the end-wall thereof into conformity with
mandrel 33 and backing-sleeve 36, as shown in the mandrel; extending the drawing-down op
Fig. 8, with the branch end 60 extending out eration along said mandrel to progressively re
transversely from the backing-sleeve 36 and duce the closed run-end and merging the drawn
down peripheral portion of said end-wall there 20
20 the mandrel 33 and with the closed end-wall 6!
with; supporting the diminishing unreduced run
engaging over the upper end of the backing
sleeve and mandrel. The press is then put in portion of the pipe-fitting blank concentrically
operation to bring the slide 41 and the closing- i with respect to the mandrel'during the continu
in or reducing-die 48 downward, the closing-in ance of the drawing-down operation; and sever
ing therequired amount from the outer end of 25
25 die engaging and reducing the closed run-end 62
by forcing thevbacking-sleeve 36 to retire against the reduced run-end to render it open and of the
desired length.
the resistance of the air-cylinder pad 3l con
3. The method of forming branch pipe-fittings
comitantly with 'the advance of the closing-in
die 48 to the position shown inFig. 9. The press _with reduced and unreduced run-ends, compris
ingzApreforming a branch pipe-fitting blank with
30 is then reversed to raise the slide 41 and the
closing-in die 48, whereupon `the backing-sleeve a run-portion of uniform diameter from end to
36 is forced upward by the air-cylinder pad 3l
end and with an end-wall on one of the run
to thus strip the reduced T-blank 63 0E of the
mandrel 33. The continued upward movement
35 of the press-slide results in the knock-out bar 51
striking the abutments 46 and forcing the knock
out plug 53 downward and thus, in the event that
ends thereof; concentrically arranging the run
» the reduced run-end 65 frictionally adheres with
in the opening 5i of the closing-in die 48, forces
40 the reduced run-end 65 out of the opening 5l in
the closing-in die 48. `The reduced end-wall 64
of the reduced run-end 65 of the reduced T
blank 63 (Fig. 4) is then cut oil to produce `the
male T shown in Fig. 5 which may be used as
45 »thus shown when this T is to be used to have
the run and branch ends inserted in the ends of
pipes for connection thereto. Where, however,
the connection with pipes is to be made by having
the pipe-end inserted into-the _run and branch
portion of said blank on a mandrel sized to cor
respond to a desired reduced run-end with which
the pipe-fitting lis to be provided and with said
end-Wall in engagement with the end of said
mandrel to support the blank from endwise dis
placement on the mandrel; interposing a yield
ably-mounted backing-sleeve between said man
drei and said run-portion of the blank with its
outer end in engagement with said end-wall;
applying to said end-wall a reducing die sized to
correspond to the desired reduced run-end, to
the end-wall at the outer end of said run-portion,
whereby a portion of said end-wall is converted
into a reduced side-wall; moving the reducing die
axially along the mandrel and forcibly receding
the backing-sleeve as the reducing action con
to the female form shown in Fig. 6 by suitable
tinues; and in severing an end portion of the re
duced run-end therefrom to render it of prede
expanding operations.
termined length.
50 ends, then the run and branch ends are enlarged
The invention may be carried out in other
specific ways than that herein set forth without
55 departing from the spirit and essential charac
teristics of the invention, and the present em
bodiment is, therefore, to be considered in all
respects as illustrative and not restrictive, and
all changes coming within the meaning and
60 equivalency range of the appended claims are
intended to be embraced therein.
I claim:
1. The method of forming reducing-T’s, com
prising: providing a T-blank having a run-por
65 tion and a branch-portion leading from the said
run-portion intermediate the opposite ends
4. The method of forming a branch-fitting
having a run-portion comprising unreduced and
reduced run-ends, comprising: preforming a
branch-fitting blank with the run-end to be re
duced at least partly closed by an end-wall;
concentrically arranging the run-portion of said
blank on a mandrel sized to correspond to the
desired reduced run-end by means of a backing
sleeve; placing said run-portion of the blank to
be supportably engaged by the end of said man
drel to be held against axial movement thereon;
applying a reducing-die sized to correspond to
the exterior surface of the desired reduced run
end to the supportably-engaged run-end to draw
down at least a. portion of said end-wall into
thereof, the said run-portion including a ?rst ter
minalghaving a tubular side-walllwhich is open at conformity with said mandrel; moving said draw
its end and a second terminal having a tubular die along said mandrel to merge said end-wall
70 side-wall and an end-wall extending inwardly portion in the reduced run-end; continuing the
from the said side-wall; supporting the T-blank . drawing-down operation while causing the back
ing-sleeve to recede in synchronism with the ad
by means of the end-wall of its said second ter
minal and subjecting the said second-terminal vance movement of the draw-die whereby the
of the T-bla-nk to a forming operation to reduce pipe-ñtting blank is increasingly spaced from
the diameter of the tubular side-wall of the said the aforesaid end-wall to accommodate the elon
gation of the run-end during its reduction; and
operation on the mandrel to reduce its diameter »
in severing the outer end-portion from the re
duced run-end to render said run-end of prede
while incorporating in the reduced tubular wall
thereof at least a portion of the said transverse
Wall; centering the run-portion of the'T-blank
and supporting the diminishing unreduced re Ul
mainder of the run-end being reduced by means
termined length.
5. The method of forming reducing-dies, con
sisting in: forming a T-blank with one of its
run-ends open and with the other of its run
ends, at least partly, closed by a transverse Wall;
placing the run-portion of the T-blank over a
10 sizing mandrel with said transverse wall in en
gagement with the end of said mandrel to pre
of a backing-sleeve slidable‘ on the sized outer
wall of the mandrel and displaceable by the draw
ing operation, and in severing the outer end of
the reduced run-end therefrom to render the 10
run-end of predetermined length.
vent axial displacement thereon; `subjecting the
run-end with the transverse wall to a drawing
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