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Патент USA US2404901

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July 30, 1946.
A, F, @153
- .
Filed Aug. 25, 1942
3 Sheets-Sheet 1
July 30, 1946.
A. F. was
Filed. Aug.. 25,‘ 1942
s Sheets-Sheet 2
16 k
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Patented July 30, 1946
Anthony F. Cibs, Cleveland Heights, Ohio, as
signor to Chase Brass & Copper 00. Incorpo
rated, Waterbury, Conn., a corporation
Application August 25, 1942, Serial No. 456,017
1 Claim.
(Cl. 164*47)
The. present; invention relates to improvements
Fig. 6 is a perspective View of the movable cut
in cutting mechanisms and. relates more partic~
ter-holder together with its tubular outer cut
ularly to improvements in mechanisms for trans_
versely severing tubes into desired lengths. The
Fig. 7 is a perspective view of the movable in
present invention, while not so limited, is espe- UL her-cutter looking mainly toward the outer end
cially Well suited for producing rotating-bands
for artillery projectiles from copper or the like.
Fig. 8 is a perspective view of the stationary
One of the objects of the present invention is
outer-cutter, detached;
to provide a superior tube-severing mechanism
Fig. 9 is a broken perspective view of the inner
which will effectively transversely sever a tube 10 end of the stationary inner-cutter, detached;
without materially distorting the same.
Fig. 10 is a perspective view of the movable in
Another object of the present invention is to
her-cutter, detached;
provide amechanism of the character referred to
Fig. 11 is a perspective View Of the movable
which will effectively sever tubes into desired
outer-cutter, detached;
lengths Without creating appreciable chips or 15 Fig. 12 is a broken perspective view of a length
other Waste material.
of tube;
A further object of the present invention is to
Fig. 13 is a perspective view of a ring 01111 from
provide a superior tube-severing mechanism
a tube by the mechanism of the preceding ?g
which will transversely sever a tube so cleanly
ures; and
as to minimize the need for a subsequent open 20 Fig. 14 is a perspective view of the stripping
Still another object of the present invention is
to provide a superior tube-severing mechanism
which will rapidly and effectively transversely
plunger, detached.
The particular tube-severing mechanism shown
in the accompanying drawings for purposes of
illustrating one form of the present invention,
sever a tube without creating appreciable waste
material and without material distortion of the
With the above and other objects in view, as
will appear to those skilled in the art from the
present disclosure, this invention includes all
features in the said disclosure which are novel
over the prior art.
In the accompanying drawings, in which con.
tain modes of carrying out the present invention
are shown for illustrative purposes:
Fig. 1 is a broken view partly in side elevation and partly in vertical central-longitudinal
section of one form of tube-severing mechanism
constructed in accordance with the present invention, and with the parts in the positions which
they assume immediately prior to the tube-cutting operation;
Fig. 2 is a view in vertical central-longitudinal
section of the mechanism at the right of Fig.
1 but on a larger scale and with the parts in the
same positions as in Fig. l ;
Fig. 3 is a view corresponding to Fig. 2 but
showing the parts in the positions which they
assume immediately following the completion of
the tube-severing operation;
Fig. 4 is a view partly in plan but mainly a
25 includes a stationary tubular outer-cutter l5, a
stationary rod-like inner-cutter $6, a movable
tubular outer-cutter H and a movable rod-like
inner-cutter 18.
The stationary outer-cutter i5 is preferably
30 formed of high-grade steel and is of tubular
form with its interior and exterior both cylin
drically contoured. The said stationary outer~
cutter i5 has the entire annular edge at the
junction of its inner perimeter and its inner face
:35 sharpened, though it is substantially only the
lower semicircle which acts as a cutting-edge l9
having an extent substantially corresponding to
the portion embraced by the bracket 26 in Fig.
8. While, as just noted, it is only the lower half
<10 of the edge of the inner portion of the stationary
outer-cutter I?» which functions as a cutting-edge,
nevertheless, for simplicity and economy of con
struction, the said outer-cutter is preferably in
the form of a tube, as shown, and its interior is
sized and proportoined to have a snug sliding ?t
around the periphery of a tube 2| constituting
the blank from the inner end of which is to be
successively cut short lengths to provide rings
such as the ring 22 shown in Figs. 3 and 13.
The rod-like inner-cutter I8 is designated as
the stationary inner-cutter for the reason that it,
horizontal sectional view taken on the line 4—-4
like the outer-cutter 55, has no lateral movement
of Fig.2;
Fig. 5 is a transverse sectional view taken on
during the cutting operation, though it is mov
able axially for purposes of installing a fresh tube
the line 5-5 of Fig.2;
55 thereon, such as 2!, as will more fully herein
after appear. The said rod-like stationary in
ner-cutter l6 has its outer periphery snugly en
gaging with a sliding ?t the inner periphery of
the tube 2!.
Furthermore and as is shown es
pecially well in Fig. 2, the inner end of the sta
tionary inner-cutter I6 is arranged flush with the
inner end of the stationary outer-cutter It. The
embraced by the bracket 44 in Fig. 10.
The inner portion of the movable inner-cutter
i3 is surrounded by an axially-adjustable gauge
CI sleeve 45 having its inner edge spaced outwardly
forward upper corner of the inner-cutter l6 con
stitutes a transverse cutting-edge 23 which latter
has an extent of substantially a semicircle as -
de?ned within substantially the limits of the
bracket 24 indicated in Fig. 9. The tubular sta
tionary outer-cutter I5 is rigidly mounted in a
cutter-holder or block 25 supported on a base
plate 26 and connected to a framework 21 of
any suitable type.
As will be noted by reference to Fig. 1, the
stationary inner-cutter 16 is relatively quite long
and has its outer end releasably mounted in an
anchoring-head 28 so as to be held against both "
lateral and axial movement under normal oper
in turn,
in any
said suitable
manner to
the outer end of the framework 2?, which latter
also supports a tube-feeding head 29 (Fig. 1) hav
ing the mandrel-like inner-cutter 16 extended
therethrough and havingr capacity for sliding
movement in a direction parallel with the lon
gitudinal axis of the cutter 16. The tube-feed
ing head 29 is provided with a pivotal dog 33 having a nose 3| adapted to be released from
and entered into the gaps in a tube-feeding chain
32 of conventional roller-chain type.
Returning now to the movable outer-cutter ll,
it will be noted that the said cutter is rigidly
mounted in a movable cutter-holder or block 33
having its inner or left face in sliding engage
ment with the inner or right face of the sta
extent substantially corresponding to the portion
from the inner face of the cutter £8 a distance
corresponding to the desired width of the ring
22 to be produced. The said gauge-sleeve 45 is
axially adjustable by means of an adjusting-nut
‘l6 threaded into the outer portion of the movable
cutter-holder or block 33. Bearing against the
outer face of'the adjusting-nut to is the inner
end of a helical cutter-retiring spring 41 which
has its outer end bearing against the inner face
of the cam-head 42 of the inner-cutter i8. As
thus arranged. the cutter-retiring spring 41 serves
to yieldingly urge the entire movable inner-cut
ter 18 axially outwardly away from the station
ary inner~cutter it.
The movable outer-cutter if has an internal
diameter corresponding to the internal diameter
of the stationary outer-cutter [5 with respect to
which it is in end-to-end relationship and re
ceives in its interior the gauge-sleeve 135, which
. latter substantially corresponds in thickness to
the thickness of the tube 2 I. The corner formed
at the junction of the upper portion of the inner
face of the cutter H and the upper portion of
its inner perimeter constitutes a cutting-edge 48
of a lateral extent substantially corresponding to
that embraced by the bracket 49 in Fig. 11. The
lower inner portion of the movable outer-cutter
H’ is cut away to a depth slightly exceeding the
width of the ring 22 to provide a clearance-notch
50 forming a vertical continuation of a clear
ance-notch 5| formed in the inner face of the
vertically-movable cutter-holder 33, all for pur
poses as will hereinafter appear.
The vertically-movable cutter-holder 33 before
tionary cutter-holder 25 before referred to, as is
especially well shown in Figs. 1 to 4 inclusive. 40 described is yieldingly urged upwardly to nor
mally maintain its cutters l1 and I3 in axial
At each of its respective opposite sides, the right
alignment with the stationary cutters l5 and [5,
or outer face of the cutter-holder 33 has sliding
by means of a plurality of vertically—reciprocat—
engagement with and is guided by two laterally
spaced-apart spacing-blocks 34-44 suitably se
cured to the framework 21. The respective outer
or right edges of the spacing-blocks 34-31% (Fig.
4) are seated against the left face of a block
llke crosshead 35 also rigidly secured to the
framework 27. The said crosshead 35 is formed
ing plungers 52 extending upwardly through and
guided in the base-plate 26. The lower ends of
the plungers 52 are mounted in a plunger-plate
53 located beneath the base-plate 26 and sliding
upon a vertical stud 54 anchored at its upper
end in the said base-plate 26.
Encircling the
in its inner or left face with a vertical groove 36 50 stud 54 at a point below the plunger-plate 53
is a helical return-spring 55 thrusting at its up
in which is mounted a cam-plate 31 having in its
per end against the underside of the plunger
left face an advance-dwell 38 extending perpen
dicularly with respect to the axis of the tube 2!
and a similarly-extending retirement-dwell 39
displaced to the right with respect to the ad
Vance-dwell 33 and connected thereto by an in
clined surface 43. The cam-plate 3'! is adjust~
able in the groove 33 of the crosshead 35 by
plate 53 and resting at its lower end upon a disk
like spring-seat 56 secured to the lower end of
55 the stud 54 by means of one or more nuts 51,
as is shown in Fig. 1.
As thus constructed and arranged, the return
spring 55 and associated parts serve to normally
maintain the movable cutter-holder 33 in its
means of a plurality of horizontal set-screws ll!
mounted in the outer portion of the said cross 60 uppermost position, in; which the outer and
inner movable-cutters I‘! and 18 are in precise
axial alignment with the normally-stationary
The movable inner-cutter [8 before referred to
outer- and inner-cutters l5 and IS. The upward
is provided at its outer or right end with a cam
movement of the cutter-holder 33, and hence of
head 42 having a portion extending into and
65 the parts carried thereby, is limited by the en
vertically sliding in the groove 38 in the cross
head 35 and shaped for sliding engagement with
the surfaces 38, 39 and All of the cam-plate 3'!
located in the said groove. The cylindrically
contoured body-portion of the said movable in
ner-cutter [3 corresponds in size to the normally
stationary inner-cutter l6 and hence corresponds
in size to the interior diameter of the tube 2!.
The inner lower corner of the inner-cutter I8
constitutes a cutting—edge 43 having a transverse
gagement of upper portions of the said holder
with adjacent portions of the framework 21.
Below its cutters l5 and 16, the stationary
cutter-holder or block 25 is formed in its inner
70 face with a cylindrically-contoured recess 58,
from the end wall of which leads an eccentrically
located cylindrically-contoured recess 59 of
relatively-smaller diameter than the recess 58.
Leading to the left from the end wall of the re
15 cess 59 to the left side of the cutter-holder 25,
is a passage 60 smaller-in diameter than the re
cess 59 and arranged concentrically therewith.
In the relatively-large~diametered recess 58
there is located the cylindrically-contoured head
6| of a reciprocating stripping-plunger B2. The
said head 6! has a downwardlv-and-inwardly
sloping inner face and has a diameter only
slightly less than the internal diameter of the
ring 22 before referred to. The stripping
plunger 62 also includes a cylindrically-contoured
shank 63 reciprocating in the recess 59 and ex
tending outwardly from the head 6! in eccentric
relationship thereto. The stripping-plunger 82
also includes a relatively-small-diametered stem
64 rigid with and extending outwardly from the
shank 63 through the passage Si) in the cutter
holder 25. As shown, the outer end of the stem
64 which projects beyond the left face of the
stationary cutter-holder 25, is provided with one
The severing just above referred to will result
in the creation of a ring'such as 22, and the
continued downward movement of the parts will
transport the said ring and the other parts re
ferred to downwardly into the positions in which
they are shown in Fig. 3. It is here to be noted
that immediately following the completion of the
severance of the ring 22 from the tube 2|, the
movable inner-cutter I8 is axially retired from
left to right by the cutter-retiring spring 41,
This movement is made possible by the sliding
of the cam-head 42 of the said cutter l8 down
the incline 40 and onto the retirement-dwell 39
of the cam-plate 37.
In reaching the position in which it is shown
in Fig. 3, the severed ring 22 will have engaged
with the sloping inner face of the stripping
plunger 62 and will have forced the same to re~
tire to the left against the tension of its spring
or more adjustable stop~nuts 65 which serve to 20 66. When, however, the ring 22 reaches a posi
limit the movement of the plunger 62 in a direc
tion in axial alignment with the head 6! of the
tion from left to right. Encircling the stem 64
stripping-plunger 62, the said stripping-plunger
and thrusting at its respective opposite ends
will move to the right under the urge of its spring
against the shank 63 and the end wall of the
66 and enter the outer end of its head GI. into
recess 59, is a helical spring 66 which exerts a ‘
the interior of the ring 22, as is shown in Fig. 3.
constant effort to move the stripping~plunger 62
The ram 68 will now be caused to retire up
from left to right.
wardly, thereby permitting the return-spring 55
Immediately below the outer tip of the
to assert itself and act through the associated
stripping-plunger G2 and below the clearance
parts to return the movable cutter-holder 33 and
notches 50 and 5| respectively formed in the 30 the parts carried thereby back into the positions
outer-cutter l1 and the cutter-holder 33, is
in which they are shown in Figs. 1 and 2. During
a discharge-passage 61 extending vertically
this upward travel of the movable cutter-holder
through the base-plate 26 and designed and
33 and associated parts, the just-severed ring 22
adapted to have successive rings like 22 pass
will be restrained against upward movement by
downwardly therethrough as the same are cut
the stripping-plunger 62, and when the parts of
off from a tube such as 2|.
the mechanism ultimately reach the positions in
The downward or cutting-stroke of the mova
which they are shown in Figs. 1 and 2, the
ble cutter-holder 33 may be effected in any ap
previously-restrained ring 22 will be free to drop
proved manner but for purposes of illustration
off of the head 6| of the stripping-plunger 62
of one form of the application of the necessary 40 and pass downwardly through the discharge
power, there is shown in Figs. 1, 2 and 3, the ram
passage 6'! in the base-plate 25 and thence into
68 which may form a feature of a power press
a suitable receptacle.
and which is adapted to impinge against the
As the parts move from the positions in which
upper surface of the movable cutter-holder 33.
they are shown in Fig. 3 back to the positions in
To make clear the operation of the mecha
which they are shown in Figs. 1 and 2, the cam
nism shown in the accompanying drawings and
head 42 of the movable inner-cutter I8 will ride
above described, let it be assumed that the parts
up the slope 40 and onto the advance-dwell 38
occupy the positions in which they are shown in
of the cam-plate 37, thereby moving the cutter
Figs. 1 and 2, in which it will be noted that the
l8 axially to the left and back into its cutting
end of the tube 2| is abutted against the adjacent
end of the gauge-sleeve 45. It is also to be noted
that the movable inner-cutter H3 is at the limit
of its movement to the left and therefore its
cutting-edge 43 is in transverse alignment with
the respective cutting-edges of the stationary
inner-cutter l6, stationary outer-cutter l5 and
movable outer-cutter ll.
If now, the ram 68 is caused to descend, it
will force the movable cutter-holder 33 and the
parts carried thereby downwardly from the po
sitions in which they are shown in Figs. 1 and
Following the restoration of the parts to the
positions in which they are shown in Figs. 1 and
2, the tube 2! may be again advanced until its
fresh~cut end is again seated against the adja
cent end of the tubular gauge-sleeve 45, prepara
tory to another cycle of operation of the mech
anism. This feeding of the tube 2| may be ef
fected in any suitable manner by advancing the
tube-feeding chain 32 to the right, thereby caus
60 ing the tube-feeding head 29 to thrust against the
outer end of the tube 2 I.
2, into the positions in which they are shown in
By means of the present invention, a tube of
Fig. 3. The movement referred to will cause the
copper or other material may be severed into de
cutting-edge 48 of the movable outer-cutter ll
sired lengths without the creation of appreciable
to coact with the cutting-edge 23 of the sta 65 chips or other waste material, and with ‘but a
tionary inner-cutter 16 to thereby sever the
minimum, if any, distortion of the tube.
upper half of the tube 2!, indicated by the
The invention may be carried out in other
bracket 69 in Fig. 12. Simultaneously also and
speci?c ways than those herein set forth without
during the ‘severing action just referred to, the
departing from the spirit and essential charac
substantially semicircular transverse cutting
teristics of the invention, and the present em
edge 43 of the movable inner-cutter 18 will coact
bodiment is, therefore, to be considered in all re
with the substantially-semicircular transverse
spects as illustrative and not restrictive, and all
cutting-edge I9 of the stationary outer-cutter [5
changes coming within the meaning and equiva
to sever the lower half of the tube 2|, indicated
lency range of the appended claim are intended
by the bracket 10 in Fig, 12.
to be embraced therein.
I claim:
A tube-cutting mechanism, including in combi
nation: a ?rst cutter-holder; a ?rst outer-cutter
having a transverse cutting-edge at its inner end
substantially conforming in size and. shape to
the outer perimeter of a ?rst half of a tube to
be cut and carried by the said ?rst cutter-holder;
a ?rst inner-cutter located within the said ?rst
outer-cutter and having a transverse cutting
edge located at its inner end in substantial trans
verse ‘alignment with the cutting-edge of the
said ?rst outer-cutter and Substantially conform
ing in size and shape to the interior perimeter of
the second half of the tube to be out; a second
cutter-holder movable in a direction transverse to
the ‘axes of the said ?rst outer-cutter and the said
?rst inner-cutter; a second outer-cutter carried
byv the said second cutter-holder in end-to-end
relationship with the said ?rst outer-cutter and
having a transverse cutting-edge in substantial
transverse alignment with the respective cuttingedges of the before-mentioned cutters and sub
stantially conforming in size and shape to the
exterior perimeter of the second half of the tube
to be out; a second inner-cutter disposed within
the said second outer-cutter in end-to-end rela
tionship with respect to the said ?rst inner-cutter
and having a transverse cutting-edge at its inner
end located in substantial transverse alignment
with the inner ends of the before-mentioned cut
ters and substantially conforming in size and
shape to the inner perimeter of the first half of
the tube to be cut, the said second inner~cutter
being axially movable toward and away from the
said ?rst inner-cutter; the said second outer-cut
ter being cut away or relieved at its inner end
opposite its transverse cutting-edge to provide a
clearance-passage fOr the substantial radial dis
charge of a severed portion of the tube; a spring
pressed stripping-member secured to the said ?rst
cutter-holder and located outwardly of and in
line with the clearance-passage in the said sec
ond outer-cutter; means for moving the said
second cutter-holder and the second outer-cutter
and inner cutter carried thereby in a direction
transverse to the axis of the tube to be out to
thereby transversely sever the tube and transport
the severed section thereof into position for en
gagement with the said stripping-member; and
means for Withdrawing the said axially-movable
inner-cutter out of the portion of the tube Within
which it is normally located and after the com
pletion of the tube-severing movement of the said
second cutter-holder.
ANTHONY F. 01138.
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