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Патент USA US2130181

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Sept. 13, 1938.
w. J. HOGG
2,130,181
POSITIVE ACTING EXPANDING PIPE DIE
Filed Dec. 30, 1936
6 Sheets-Sheet l
MN
INVENTOR
J.’
w"
Sept. 13, 1938.
w. J. HOGG
2,130,181
POSITIVE ACTING EXPANDING PIPE DIE
Filed Dec. 50. 1936
> e Sheets-Sheet 2
Hum"
INVENTOR
Sept. 13, 1938.
2,130,181
w_ J_ HQGG
POSITIVE ACTING EXPANDING PIPE DIE
Filed Dec. 30, 1936
6 Sheets-Sheet 5
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INVENTOR
WoClocun JHoqq
Vl/
A
RNEY
Sept 13, 1938-
w. J. HOGG
2,130,181
POSITIVE ACTING EXPANDING PIPE DIE
I
Filed Dec. 30, 1936
6 Sheets-Sheet 4
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INVENTOR
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‘Sept. 13,
w_ J‘ HOGG
2,130,181
POSITIVE ACTING EXPANDING PIPE DIE
Filed Dec. 50, 1936
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Sept. 13,
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POSITIVE ACTING EXPANDING PIPE DIE
Filed Dec. 50, 1936
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WiW
INVEIZTOR
BY
712m JHoggl
'
ATT RNEY
Patented Sept. 13, 1938
2,130,181
UNITED STATES PATENT OFFICE
'1
‘2,130,181
POSITIVE ACTING EXPANDING PIPE DIE
William J. H083‘, Cleveland, Ohio, assignor to The
National Acme Com
corporation of Ohio pany, Cleveland, Ohio, a
Application December 30, 1936, Serial No. 118,313
20 Claims. (01. 10-1205)
This invention relates to threading dies, the
object thereof being to provide an improved posi
tively acting expanding pipe die, simple in con
struction, comparatively inexpensive to manu
Cl facture, ef?cient in use, and by means of which
the cutters or chasers will be positively expanded
e?iciently and accurately to cut a tapered thread.
In the drawings accompanying and forming a
part of this speci?cation, Fig. 1 is a longitudinal
H) section of this improved threading die, the ?gure
also illustrating a pipe in position with a tapered
thread cut thereon and also illustrating in dotted
lines a smaller diameter of pipe.
Fig. 2 is a front end view of the die shown in
Fig. 1.
Fig. 3 is a rear end view of the die shown in
Fig. 1.
‘
Fig. 4 is a cross sectional view taken on the
line li—4 of Fig. 1, looking in the direction of
0 the arrows.
Fig. 5 is a cross sectional view taken on the line
5-5 of Fig. 1, looking in the direction of the
arrows.
Fig. 6 is a longitudinal sectional view taken on
the line 6-6 of Fig. 3, looking in the direction
of the arrows.
Fig. 7 is a longitudinal section of the rear end
of the die, showing the trip plungers and. trip
levers.
Fig. 8 is an exterior view thereof.
Fig. 9 is a transverse section on the line 9—9
-of Fig. 1, illustrating the drawback cam and
its roll, and
Fig. 10 is a. plan view of Fig. 9.
Similar characters of reference indicate cor
responding parts in the several views.
Before explaining in detail the present im
provement and mode of operation thereof, I de
sire to have it understood that the invention is
not limited to the details of construction and ar
rangement of parts illustrated in the vaccompany
ing drawings since the invention is capable of
other embodiments, and that the phraseology em
ployed is for the purpose of description and not
of limitation.
'
The chasers or cutters used in this improved
die are of circular form and are similar to those
shown and described in my prior Patents Nos.
1,923,265, of August 22nd, 1933, and No. 1,952,205
of March 27th, 1934, and, therefore, a detailed description thereof is unnecessary.
These chasers 2 may be mounted in a manner
similar to that shown and described in said
patents, upon chaser blocks 3 radially supported
in suitable guideways 4 of a head 5 secured to a
housing or cap 6 ?tting within a rotatable and
longitudinally shiftable sleeve 1.
Within this housing- 6 is a die body 8 having a -
rearwardly extending stem 9 axially guided at
its rear end in a bore of the housing 6.
The
housing 6 and body 8 have relative sliding move
ments. When the work is fed, the .body 8 will
be shifted within the housing but when the die
is fed as in the present instance, the housing is
shifted on the body during the threading opera
tion.
Mounted on the die housing 6 in front of the
sleeve is a shiftable hood it to which are secured
tapered gibs ll interlocking with the projecting
ends of the die blocks 3 and by means of which 10
the die blocks and the chasers are gradually and
positively expanded to cut a tapered thread and
also shifted into position to start the threading.
Rotatably supported by suitable bearings i2
on a forward projection or nose of the die body
8 is a projecting collar carrying member 13 se
. cured on the projection by nuts and threaded for
the reception of detachable collars i4 and 85.
These collars have diameters corresponding to
different external diameters or sizes of pipes and 20
various diameters of collars may be used within
the capacity of the die for different sizes of pipes.
As shown in full lines in Fig. 1, when the die is
brought up to the pipe to be threaded, the end
of the pipe will contact with the collar 55, or if
it is a smaller size of pipe, it will contact with 25
the collar l4 and hold the die body 8 back in
the bore of the housing 6 of the die as the latter
moves forward to have its chasers cut the threads
in the pipe. The bearings l2 serve to reduce to a
minimum friction between the work and the col 30
lars.
I
Attached to the die body by keys I6 is a pair
of oppositely located rollers I1. These keys slide
in a pair of elongated slots or key-ways l8 in the
housing 6 and these slots l8 prevent rotation of 35.
the keys I 6 and body 8 relative to the housing
but permit shiftable movement back and forth of
the die body 8 and housing 6 relative to each
other.
The rollers I1 project into a pair of spiral slots ‘
l8’ (see Fig. 8) machined in the sleeve ‘I mounted ‘
40
on the housing 6 and, therefore, as the hous
ing 6 moves forward, the rollers i1, while the
body 8 is held back by the work, cause the sleeve 45
1 to turn or rotate. As the sleeve turns, a series
of spaced rollers l9, preferably three, secured to
the sleeve, move circumferentially therewith and
draw the cams 20 attached to the hood likewise
backward, this backward movement being also 50
assisted by a series of springs 2| and also springs
25 hereinafter referred to in that they take up
any wear of the cams and rollers. In other words,
the forward travel of the die causes the pipe in
engagement with one of the collars M or I5 to 55
vhold back the body 8 and thereby, through the
rollers l‘i, rotates the sleeve 1 so that the rollers
IQ of this sleeve 1 will ride between the inclined
opposed faces of the cams 20 of the hood and thus
draw the hood graduallyto the rear on the hous 60
2
Q,180,181
ing 3. The springs 2| constantly hold the for
ward cam ‘faces ‘in_ engagement with. the ‘rollers
4_
~ "s'
'
ing at one end thereof, means carried by the body
‘for rotating said rotatable means as the housing
and body are relatively shifted by the work, a plu- "
rality of chasers, shiftable means carried by the
housing at the other end thereof for gradually
to draw the hood l0 backward in a positive shifting the chasers to cut a tapered thread, and
interlocking cam means carried at the rear of said
manner.
'When this hood in is thus gradually drawn shiftable and at the front of said rotatable means
back, the tapered gibswll pull the chaser blocks 3 . whereby, on the rotation of the latter, said shift
ing means will be gradually drawn back relative
10 gradually outwardly, causing the chasers to. ex
to the housing.
i 9.
.
.
~
In Figs. 9 and 10, the formation of one of these
.cam members is shown, wherebythey will act
pand slowly, thereby cutting a tapered thread on
the pipe controlled by the taper on the gibs i I and
which are gradually shifted in correspondence
with the taper on the earns 20.
15
The position of the collars ll or II determines
the length of the thread. By adjusting the collar
forward so that it contacts the work prior to the
engagement thereof by the chasers, a short thread
2. A threading die of the class described com
prising a housing and abody shiftable one relative
to the other, rotatable means carried by the hous
ing at one end thereof, means carried by the body
for rotating said rotatable means as the housing
and body are relatively shifted by the work, a plu
rality of circular chasers, shiftable means carried
by the housing at the other end thereof for gradu
will be obtained and a reverse adjustment‘ will
‘ ally shifting the chasers to cut a tapered thread,
20 give a longer thread since the position of the col
acting means carried at the rear of said
lars determines the relative sliding movement of positively
shiftable and at the front of said rotatable means
the housing 6 and body 8.
The adjustable collar 32 locked in position by whereby, on the rotation of the latter, said chaser
means will be gradually drawn back rela
the collar 33 determines the adjustment for size shifting
tive to the housing, and means for maintaining
since,
by
adjusting
this
collar
on
the
sleeve
‘I,
this
25
sleeve 1, roller l9, cam 20, hood in and gibs II are contact between said chaser shifting means and
said rotatable means.
shifted forward or backward causing the adjust
3. A threading die of the class described com
ment of the chasers outward or inward for larger
prising a housing and a body shiftable one rela
or smaller diameters of work.
When the die has moved forwardly sufficiently tive to the other, rotatable means carried by the
30
to out the thread, the trip plungers 22 carried by housing at one end thereof, means carried by the
the body (see Figs. 6 and '7) and having tapered body for rotating said rotatable means as the
ends come into contact with rollers 23 carried by housing and body are relatively shifted by the
work, a plurality of chasers, shiftable means car
trip levers 24 mounted in the rear end of the hous
ing 6 of the die and which project into position ried by the housing at the other end thereof for
to lock the sleeve 1 by engaging a collar 32 thereof.
These trip levers have their ends formed to en
gage both sides of the collar 32.
When the tapered ends of these plungers thus
engage the rollers 23, they force the spring
pressed trip levers to recede into the housing 6 of
the die, thereby allowing the control sleeve ‘I, to
gether with the hood iii, to jump back under the
pull of the springs 2i and 25.
45
_
'The springs 2i are located in openings of the
hood l0 and die head 5 carrying the chaser blocks
3 while the springs 25 are located in recesses 26 of
the housing 6 and connected at their ends 21 and
28 to this housing and to the hood.
When the hood l0 thus Jumps backward, the
50
gibs ii, interlocked with the chaser blocks 3, pull
the blocks and their chasers out of the threads.
The die may be reset in any suitable manner as
by means of a handle 29 (see Fig. 8) for moving
55 the sleeve 1 and thereby the hood ill until the
parts are in their normal operating position, at
which time the trip levers will again lock the‘
sleeve 1 in position.
The housing 6 of the die is provided with a suit
60 able stop or stops 30 (see Fig. 8), to limit rear
ward movement of the sleeve when the trip levers
release the sleeve.
/
It is to be understood that, by describing in de
tail herein any particular structure or arrange
65 ment, it is not intended to limit the invention be
yond the terms of the several claims or the re
quirements of the prior art.
Having thus explained the nature of my said
invention and described a way of constructing and
70 using the same, although without attempting to
set forth all of the forms in which it may be made
or all of the modes of its use, I claim:
-
1. A threading die of the class described com
prising a housing and a body shiftable one relative
75 to the other, rotatable means carried by the hous
Ll
gradually shifting the chasers to cut a tapered .
thread, cooperating interlocking cam means car
ried at the rear of said shiftable and at the front
of said rotatable means whereby, on the rotation
of the latter, said chaser shifting means will be 40
gradually drawn back relative to the housing, and
means for maintaining contact between said
chaser shifting means and said rotatable means.
4. A threading die of the class described com
prising a housing and a. body shiftable one rela 45
tive to the other, rotatable ,means carried by the
housing, means carried by the body for rotating
said rotatable means as the housing and body are
relatively shifted by the work, a plurality of
chasers, shiftable means carried by the housing
for gradually shifting the chasers to cut a ta
pered thread, means carried by said shiftable
and rotatable means whereby, on the rotation of
the latter, said chaser shifting means will be
gradually drawn back relative to the housing,
means for maintaining contact between said
chaser shifting means and said rotatable means,
and means for tripping the rotatable means on
the completion of the threading, said means com
prising a trip lever slidably carried by the hous
CO
ing and means carried by the body for directly
engaging said trip lever upon the completion of
the threading operation.
5. A threading die of the class described com
prising a housing and a body shiftable, one rela 65
tive to the other, rotatable means carried by the
housing, means carried by the body for rotating
said rotatable means as the housing and body are
relatively shifted by the work, a plurality of
chasers, shiftable means carried by the housing 70
for gradually shifting the chasers to cut a ta
pered thread, positively acting co-operating cam
means carried by said shiftable and rotatable
means whereby, on the rotation of the latter,
said chaser shifting means will be gradually drawn
75
2,130,1e1
3.
back relative to the housing, means for main
taining contact between said chaser shifting ~ said body having means adapted to contact with
means and said rotatable means, and means for the work thereby to hold the body back within
tripping the rotatable means on the completion the housing, a rotatable sleeve on said housing,
of the threading, said means comprising a trip means carried by the body and co-operating with
lever slidably carried by the housing and means the sleeve for rotating it, a hood mounted on the 5
carried by the body for directly engaging said _\ housing, means carried by the hood and sleeve
trip lever upon the- completion of the threading whereby on the rotation of the sleeve the hood
operation.
will be gradually drawn, back, a plurality of
10
chasers, means controlled by the hood for grad
8. A threading die of the class described com
prising a housing and a' body slidable one relative ually expanding the chasers thereby to cut a 10
to the other, said body having means adapted to tapered thread, and means for tripping the ro
contact with the work thereby to hold, the body tatable sleeve on the completion of the threading
back within the housing, a rotatable sleeve on thereby to release the cutters from the work,
said means comprising a trip lever slidably car- .
15 said housing, means carried by the body and co
ried
by the housing and means carried by the body
operating with the sleeve for rotating it, a hood
for directly-engaging said trip lever upon the 15
directly mounted on the housing in front _of and completion
of the threading operation. '
spaced from said rotatable sleeve, interlocking
hood for gradually expanding the chasers thereby
ill. A threading die of the class described com
prising a housing and a body relatively slidable,
said body having interchangeable friction reduc
ing means adapted to contact with the work,
thereby to hold the body back within the housing,
" 'ITA threading die of the class described com
ried by the body and co-operating with the sleeve
means carried at the rear of the hood and at the
: front of said sleeve whereby on the rotation of the
sleeve the hood will be gradually drawn back, a
plurality of chasers, and means controlled by the
to cut a tapered thread.
25
prising a housing and a body relatively slidable,
said body having means adapted to contact with
the work thereby to hold the body back within
the housing, a rotatable sleeve on said housing,
means carried by the body and cooperating with
the sleeve for rotating it, a hood directly mounted
on the housing in front of and spaced from said
rotatable sleeve, co-operating interlocking cam
means carried at the rear of the hood and at the
front of the sleeve whereby on the rotation of the
sleeve the hood will be gradually drawn back, a
plurality of chasers, and means controlled by the
hood for gradually expanding the chasers thereby
to cut a tapered thread.
40
'
8. A threading die of the class described com—
20
a rotatable sleeve on said housing, means car
for rotating it, a hood directly mounted on the 25
housing infront of and spaced from said rotat
able sleeve, positively acting cooperating cam
means carried at the rear of the hood and at the
front of the sleeve whereby on the rotation of the
sleeve the hood'will be gradually drawn back, a ~
plurality of chasers, and means controlled by the
hood for gradually expanding the chasers thereby
to cut a tapered thread.
'
12. A threading die of the class described com
prising a housing and a body shiftable one relative
to the other, rotatable means carried by the hous
ing, means carried by the body for rotating said
rotatable means as the housing and body are
relatively shifted by the work, a plurality of
chasers, shiftable means carried by the housing
prising a housing and a’ body relatively slidable,
said body having means adapted-to contact with in front of and spaced from said rotatable means
the work thereby to hold the body back within for gradually shifting the chasers to cut a tapered
the housing, a rotatable sleeve on said housing, thread, interlocking cam means carried at the
means carried by the body and cooperating with rear of said shiftable and at the front of said
the sleeve for rotating it, a hood directly mounted rotatable means whereby on the rotation of the
on the housing in front of and spaced from said latter, said chaser shifting means will be grad
rotatable sleeve, cooperating interlocking cam ually'drawn back relative to the housing, and
means carried at the rear of the hood and at the means for adjusting the rotatable means.
13. A threading die of the class described com
front of the sleeve whereby on the rotation of
prising
a housing and a body one shiftable rela
the sleeve the hood will be gradually drawn back,
tive to the other, rotatable means carried by the 50
resilient means for maintaining contact between - ghousing,
means carried by the body for rotating
the cam means of the hood and the sleeve, a plu
rality of chasers, and'means controlled by the
hood for gradually expanding the chasers thereby
to cut a tapered thread.
9. A threading die of the class described com
prising a housing and a body relatively slidable
CO
said body having means adapted to contact with
the work thereby to hold the body back within
said rotatable means as the housing and body
are relatively shifted by the work, a plurality of
chasers, shiftable means carried by the housing
for gradually shifting the chasers to cut a ta 55
pered thread, means carried by said shiftable and
rotatable means whereby, on the rotation of the
latter, said chaser shifting means will be grad
the housing, a rotatable sleeve on said housing, ually drawn back relative to the housing, means 60
means carried by the body and cooperating with for maintaining contact between said chaser
the sleeve for rotating it, a hood directly mounted shifting means and said rotatable means, means
on the housing in front of and spaced from said’ for tripping the rotatable means on the com
rotatable sleeve, positively acting cooperating cam
means'carried at the rear of the hood and at the
front of the sleeve whereby on the rotation of the
sleeve the hood will be gradually drawn back,
resilient means for maintaining contact between
the cam means of the hood and the sleeve, a
plurality of circular chasers, and means controlled
by the hood for gradually expanding the chasers
thereby to cut a tapered thread.
10. A threading die of the class described com
prising a housing and a body relatively slidable,
pletion of the threading, said means comprising
a trip lever slidably carried by the housing and
means carried by the body for directly engaging
said trip lever upon the completion of the thread
ing operation, and means for adjusting the ro
tatable means.
14. A threading die of the class described com
prising a housing and a body, one slidable rela
65
70'
tive to the other, said body having rotatable
friction reducing means adapted to contact with
the work thereby to hold the body back within
the housing, a rotatable sleeve on said housing, 75
4
9,180,181
means carried by the body and cooperating with
the sleeve for rotating it, a hood directly mounted
on the housing in front of said sleeve, positively
acting cooperating cam means carried at the rear
of the hood and at the front of said sleeve where
by on the rotation of the sleeve the hood will be
gradually drawn ‘back, a plurality of chasers,
means controlled by the‘ hood for gradually ex
panding the chasers thereby to cut a tapered
10 thread, and means for adjusting the rotatable
sleeve.
'
'
.
15. A pipe die for cutting tapered threads com
prising a housing having elongated slots, a body
movable relative to the housing and having pro
jecting means shiftablein said slots and carrying
rollers, a sleeve on the housing and having spiral
slots into which said rollers project and by means
of which the sleeve is rotated on the relative
shifting of the body and housing, a hood directly
mounted on the housing in front of said sleeve’
and carrying tapered gibs, a plurality of chaser
carrying blocks slidingly mouned in front of the
hood and interlocked with the gibs whereby on
the movement'of the hood the chasers will be
'
,
hood will be positively drawn rearwardly to shift
the gibs, thereby to expand the cutters, means
for holding the cams'of the hood in engagement
with the means of the sleeve, tripping means for
releasing the sleeve when the thread has been
cut thereby to permit the same to Jump rear-'
wardly together with the hood and release the
cutters from the threads, said means comprising
a trip lever slidably carried by the housing and
means carried by the body for directly engaging‘ 10
said trip lever upon the completion of the thread
ing operation, and means for adjusting the ro- ,
tatable sleeve.
18. A pipe die for cutting tapered threadscom
prising a housing having elongated slots, :1. body
movable relatively to the housing and having
projecting means shiftable in said slots and carry
ing rollers, a sleeve on the housing and having
spiral slots into which said rollers project and by
means of which the sleeve is rotated on the rela
20
tive .shifting of the body and housing, a hood
mounted on the housing and carrying tapered
gibs, a plurality of chaser carrying blocks slid
ingly mounted in front of the hood and inter
gradually expanded to cut tapered threads, cams locked with the gibs whereby on the movement of
‘carried at the rear of the hood, means cooperating . the hood the chasers will be gradually expanded
to cut tapered threads, positively acting cams
therewith and carried (at the front of the rotat
able sleeve whereby on the rotation of the sleeve carried by the hood, means cooperating therewith
the hood will be positively drawn rearwardly to and carried by the rotatable sleeve whereby on
shift the gibs, thereby to expand the cutters, and the rotation of the sleeve the hood will be posi 30
so means for holding the cams of the hood in en
tively drawn rearwardly to shift the gibs thereby
to expand the cutters, tripping means for re
gagement'with the means of the sleeve.
leasing the sleeve when the thread has been cut
16. A pipe die for cutting tapered threads ‘com
prising a housing having elongated slots, a body thereby to permit the same to jump rearwardly
together with the hood and release the cutters 65
- movable relatively to the housing and having pro
jecting means shiftable in said slots and carrying from the threads, said means comprising a trip
rollers, a sleeve on the housing and having spiral lever slidably carried by the housing and means
slots in which said rollers project and by means carriedby the body for directly ‘engaging said
of which the sleeve is rotated on the relative trip lever upon the completion of the threading
shifting
of the body and housing, a hood mounted operation, and resilient means for holding the Q10
40
cams of the hood in engagement with the means
on the housing and carrying tapered gibs, a plu
rality of chaser carrying blocks slidingly mounted of the sleeve and for effecting the retraction of
in front of, the hood and interlocked with the gibs the sleeve.
19. A threading die of the class described com
whereby on the, movement of the hood the chasers
prising
a housing and a body therein and shiftable 45
will be gradually expanded to cut tapered threads,
cams carried by the hood, means co-operating one relative to the other, rotatable means mount
therewith and carried by the rotatable sleeve ed on the housing, means carried by the body for
whereby on the rotation of the sleeve the-hood rotating said rotatable means as the housing and
will be drawn rearwardly to shift the gibs, thereby body are relatively shifted, a plurality of chasers
to expand the cutters, means for holding the cams ' carried by the housing, shiftable means directly
50 of the hood in engagement with the means of the mounted on the housing in front of said rotatable
sleeve and tripping means for releasing the sleeve . means for actuating the chasers, and interlocking
when the thread has‘ been cut thereby to permit cam means carried at the rear and front, re
the same to jump rearwardly together with the spectively, of the shiftable and rotatable means
hood and release the cutters from the'threads, for positively gradually drawing back the shift 55
55 said means comprising a trip lever slidably car
able means on the ‘rotation of the rotatable
7
ried by the housing and means carried by the means.
20. A threading die of the class described com
body for directly engaging said trip lever upon the
prising a housing ‘and a body therein and shift
completion of the threading operation.
able one relative to the other, rotatable means
1'7.
A
pipe
die
for
cutting
tapered
threads
com
60
prising a housing having elongated slots, a body mounted on the housing, means‘ carried by the
body for rotating said rotatable means as the
movable relatively to the housing and having pro
jecting means shiftable in said slots and carrying housing and body are relatively shifted, a plu
rollers, a sleeve on the housing and having spiral rality of ‘ chasers carried by the housing, shift
slots into which said rollers project and by means able means directly mounted on the housing in 65
65 of which the sleeve ‘is rotated on the relative front of said rotatable means for actuating the
shifting of the body and housing, a hood mounted chasers, interlocking cam means carried at the
rear and front, respectively, of the shiftable and
on the housing and carrying tapered gibs, a plu
rality of chaser carrying blocks slidingly mounted rotatable means for positively gradually drawing
in front of the hood and interlocked with the gibs back the shiftable means on the rotation of the 70
70 whereby on the movement of the hood the rotatable means, and tripping means for tripping
.
chasers will be gradually expanded tocut tapered
threads, cams carried by the hood, means co
operating therewith and carried by the rotatable
sleeve
whereby on the rotation of the sleeve the
75
the rotatable means on the completion of the
threading operation and carried by the body and
housing.
WILLIAM J.‘ HOGG. 75
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