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Патент USA US2120649

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June .14, 1938,
, l ‘
V
H. ROSENBERG
v
2,120,649
MACHINE FOR MAKING CAPPED NUT BLANKS
Original Filed May 21, 1935
4 sheei?sheet-l
2,120,649
H. ROSENBERG
u
MACHINE FOR MAKING CAPPED NUT BLANKS
Original Filed may 21, 1935
4 Sheets-Sheet 2
R
June 14, 1938.
‘
H, ROSENBERG
2,120,649
MACHINE FOR MAKING CAPPED NUT BLANKS
Original Filed May 21, 1935
4 Sheets-Sheet 3
29'
1-5.5
5 nvelnboz ',
adorn u‘ .
June 14, 1938.
H.’ ROSENBERG
291N549
MACHINE FOR MAKING CAPPED NUT BLANKS
Original Filed May 21, 1935
Ti 5:1 U.
4 Sheets-Sheet 4
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2,120,649
Patented June 174, 1938
UNITED“ "STATES PATENT‘
is‘
Heyman Rosenberg, New York, N. Y.
Original application May 21, 1935, Serial No.
22,593, new Patent No. 2,090,641‘, dated August
24, 1937. Divided and this application .ilune
18, 1937, Serial No. 148,895
9 Claims. (6i. ill-'26)
This application is a division of my pending
application Serial No. 22,593, ?led May 21, 1935,
for Art of producing capped nut blanks. In that
application disclosure is made of methods and
Ill apparatus for die-forming ‘capped nut blanks
. from either slugs or sheets of metal.
Brie?y the
method, which is both disclosed and claimed in
said application, involves die-forming a slug or
disc of metal into a thimble-like shell or blank,
10 and then die-forming-the thimble-like blank to
convert it into a blank having the proper exter
nal and internal con?guration of a ?nished, but
unthreaded, capped nut.
The said application also discloses but does not
15 claim three machines used in practicing the
claimed method; namely, a machine for forming
the thimble-like blanks from slugs of metal, a
machine for forming the thimble-llke blanks
from a sheet of metal, and a machine for con
20' verting the thimble-like blanks into unthreaded
capped nut blanks. The present application is
concerned with the ?rst of these machines, the
one which forms thimble-like blanks from slugs
liminary forming die thrusts the slug into the 5
female die and shapes it exteriorly to substan
tially the contour of the female die to form one
end of the slug to substantially the dome shaped
contour of the finished blank. The preliminary
diealso forms a central recess or depression in it
the end face of the slug which it engages. The
second forming die, which is the ?nishing die,
carriesa ?nger for die-forming the interior cavity
of the blank.
The blank is carried away from
the female die upon the ?nishing die and is then 15
carried forward, out of alinement with the female
die, at the non-forming stroke of the ?nishing
die. A stripper is provided for engaging behind
the thus advanced blank and stripping blank j
from the ?nishing die as the die recedes.
20
Other objects and advantages will hereinafter
appear.
In the drawings forming part of this speci?ca
It is an object of the present invention to pro
vide a machine capable of die-forming thimble
like blanks from solid slugs of metal.
It is a further object of the invention to pro- '
vide a machine for die-forming thimble-like ,
embodying features of the present invention;
Figure 2 is a view in elevation, partly broken
.
‘
30 blanks from solid slugs of metal without sub
stantial waste of material
away, of a piece of work material, such as a frag- 30 v
'
It is a still further object of the invention to
provide a machine constructed and organized to
form thimble-like blanks rapidly andefiectively
ment or slug severed from wire stock, which is
converted through the instrumentality of the
present invention into a thimble-like shell;
Figure 3 is a longitudinal sectional view
and in an automatic manner from wire stock ' through such a slug as that illustrated in Figure 2 35
fed into the machine, with substantially no other
attention or supervision than the occasional plac
ing of a fresh reel of wire stock in position to‘
be fed to the operating instrumentalities of the
40
ierring mechanism, carries two forming dies for
cooperating with the female die at alternate for
ward strokes of the plunger. The ?rst or pre
tion and illustrating an advantageous and prac-\
25
tical embodiment of the invention
Figure 1 is a view partly in side elevation and
partly in vertical section of a double stroke header
of metal.
35.
in timed relation to the slug-severing and vtrans- '
machine‘.
,
at the conclusion of the ?rst or preliminary form—
ing operation;
-
'
Figure 4‘ is a longitudinal sectional view of the
blank of Figure 3 after the second or ?nishing
forming operation;
40
To these ends, a very advantageous and prac
tical form of machine embodying the invention
desirably consists of a double stroke standard
Figure 5 is a view partly in plan and partly in
horizontal section of the header of Figure l. the
header, embodying instrumentalities enabling the
than the scale of Figure 1;
Figure 6 is a fragmentary, detailed view show- ‘15
ing the plunger dies of Figures 1 and 5 in eleva
tion and other parts in section, the parts being
45 machine rapidly and automatically to convert
slugs of metal into thimble~like blanks by a suc
cession of die-forming operations performed upon
each blank. The machine desirably includes
means for intermittently feeding wire from a
50 _ wire reel through steps of measured length, and
mechanism for severing a slug of metal from the
lead’ng end of the wire after each wire feeding
step and for transferring the severed slug to
alinement with a stationary, female, forming die.
55 A double stroke reciprocating plunger, operating
parts being shown on a scale somewhat larger
shown in the positions which they occupy at the
conclusion of the preliminary forming stroke;
Figure '7 is a view similar to ‘Figure 6, but 50
showing the parts in the positions which they
occupy at the conclusion of the finishing form
ing stroke;
Figure 8 is a viewin front elevation of the die
block and stripper means, parts being broken its
2
2,120,649
away-and shown in section for disclosing other
plunger dies 5 and I spaced from the ‘cooperat
ing, opposed matrix die 0. At one side of the
Figure 9 is a‘ fragmentary, side elevation of die 8 is a cut-off die 8 and a laterally recipro
the matrix die block showing'the stripper in end cating cutter bar Ill (corresponding to cutter ll
wise concealed parts;
Cl
view: and
-
,
of said Petitjean patent) with which cooperates
the spring-stressed clamping ?nger ll carried
.
Figure 10 is a horizontal section taken on the
plane indicated by the line Ill-“Lot Figure 8,
by the fiddle how (not shown but seen at ,i'l in
and looking inthe direction of the arrows.
As previously indicated, the illustrative ma
10 chine is a form of standard double stroke header,
said Petitjean patent, ?nger-II corresponding to
finger 2| of said patent) for clamping the mate
rial severed by the bar I0 against the bar while
the bar is moving into line with the die 0. A
reciprocating cutter slide i2 (corresponding to
slide B of the, Petitjean patent) carries the
having instrumentalities embodied in_it for en
abling it to convert a slug like that of Figure 2
into a thimble-like blank as shown in Figure 4,
by die-forming operations.
15
'
, shearing bar i0. Slide i2 is reciprocated in timed
It is, of course, well understood in the indus
try that a header is a machine for forging en
relation to the action of the die block 2, and the
plunger dies 5 and 8. Thus, shearing bar i0 suc
largements on the ends of wire or rod blanks in
cessively severs a slug_ or blank from a supply‘ of
the course of manufacturing nails, screws, bolts,
and like fasteners. One of the earlier and sim
wire or rod fed through die 9, moves the slug
over to alinement with ‘matrix die 8, with the
cooperation of ?nger ll, releases the blank or
slug, and returnsto cut 011- the next blank or
slug in timed relation to the movements of the
20 pler forms of such headers is seen more or less
diagrammatically in the patent to T. Ferry, No.
1,069,659, dated August 5, 1913. The header
shown in the said Ferry patent is of the double
stroke type, that is to say, a forming or matrix
25 die is located to receive material to be treated
by‘ two plunger dies, one of which is caused to
approach and act upon the material at one stroke
of the machine, and then to shift out of line
while the other shifts into line and acts von the
30 material during the next stroke. The headers
have become somewhat more complicated and
more ef?cient than the illustration in the patent ‘
just mentioned, but-the principle generally re
other cooperating parts.
‘In nail making headers, the die corresponding
to die 8 is the heading die, andv appropriately
recessed punches are carried by the punch hold
er 4 to cooperate with the blank in the heading
die.
According to the present invention, how
ever, the punches or plunger dies 5 and 8 are
not the ordinary heading ‘cone punches but are 30
especially constructed and incorporate features
of the present invention.
It will be noted that
the die 8 is provided centrally with a recess l3
into which the material of the blank is to be
mains the same in the two-stroke headers. An
illustration of a modern and efficient header is forced in giving the blank ‘its initial and second
found in the product now being marketed by - shapes. To this end. the plunger die 5 is pro
the Waterbury Farrel Foundry and Machine vided with a preferably cylindrical, reduced ex
Company, of Waterbury, Connecticut. and the . tension or projection ll terminating in a parti
present invention is well adapted to be incorpo
globular or bulbous extension I5, centrally, axi
rated and embodied in such a header, and espe
cially in a header of the type popularly referred
to as solid-die, double-stroke, high speed crank
header. Parts of this header are disclosed in
the patent to C. 0. Petitjean, No. 1,478,356,
Parts commonly ‘
45 dated December 18, 1923.
known and popularly used on such headers are
in part omitted and in part "shown in the ac
I companying drawings, so much only being illus-'
trated as is adapted for facilitating disclosure
50 of the present invention. Detailed description
of parts that are thus commonly known and are
not directly modi?ed by‘ the rresent invention is
omitted as not needed.
'
Referring to the drawings by‘ numerals, the
55 apparatus seen in Figures 1 to 10 inclusive con
sists essentially of a header having the usual
pitman 1 journaled on an actuating crank and
ally located.
The free end surface of the pro
jection I‘ with the exception of the bulbous part
I! is ?at, and the projection H is of a diameter
to snugly ?t within and slide into the die recess
I! for effectively forging the slug or piece of
work material comprising the blank it of Fig
ure 2 against the inner end and sides of the
recess II to substantially the condition seen at
l8’ in Figured, with the depression I! in its
outer end. Irregularity in the original shape of
the blank I6 is not objectionable so long as the 50
material is of such contour and quantity that it
can be successfully forced into the die recess l3
and there cold forged into the form of a thimble
like shell 20; seen detached in Figure 4.
Whether the work material be a slug, as seen 55
at IS in Figure 2 cut from a supply of wire or rod,
or a vslug otherwise produced, the slug is held, as
pivoted to impart the requisite thrusts to the by cutter bar I 0 and ?nger il, in line with the
die block 2. A plunger slide 3 is carried by the ' die recess l3 as the die block 2 is concluding the
60 die-block 2 in position'to slide vertically thereon, ?rst forward stroke, so that projection H with 60
or across the rectilinear horizontal path of the its rounded extension I! engages the slug and
forces it into recess I1 and compresses it suf
die block 2 while being carried thereby and re
ceiving its thrust therefrom. A punch holder 4 ficiently for cold forging it and causing it to con
is mounted ‘on the plunger slide 3 and carries form substantially to the contour of the die recess
l3 and to thus assume the shape I8’ of Figure 3.
the punches or plunger dies 5 and 6 which are
spaced vertically apart. An appropriate appaa Then the die block 2 recedes and leaves the work
ratus, such as a crank ‘i and its connected parts,
material IS’ in the die recess it.
imparts timed, vertical shifting movement to
Before the next advancing stroke of die. block’
the plunger slide 3 to cause the punch or plunger
70 die 5 ?rst to operate and then to move up out
2, the punch slide‘ is shifted upward by the action
of line, and then the punch 'or plunger die 6 to
operate.
'
.
_ Of course, the parts just described are appro
' priately mounted in a suitable bed or framework
76 ‘I’ having an internal space accommodating the
of the-crank 1 and cooperating parts until the
plunger die 8 is brought into line with the die
recess l3. Plunger 8 is provided with an axially
outstanding shaping ?nger it which, in the for
ward’strokeofidie block 2, enters the recess l3
and enters. the centering depressing IQ of blank 75
3
2,120,049
Hi’, and the further advancing movement of the engagement requiring the thimble to be stripped
?nger 18 causes‘ the material of blank l8’ to be
from the ?nger to prepare the finger for the next
?owed both laterally into more compact condl- ' operation. To that end, the stripping mechanism
tion, and longitiidinally into greater length, mov n seen in Figures 6 to 10 inclusive is provided. As
ing outward along the die finger l8 to the posi
tion’ substantially as indicated in Figure \7, so
that the work material in the die recess i3 is
best seen in Figures 7 and 8, the die engaging 5
block 25 for die 8 is provided with a recess 26 to
accommodate the projection H on the second
~ , thus caused to assume the contour seen in Fig
stroke oi’ the die block 2, the recess 26 being
me 4, or substantially that, contour. It should
10 be understood that the showing of the work ma
terial in Figures 2, 3, 4, 6, and 7, is more or less
idealized as expressing the characteristic con
tours given to the-work material as the process
progresses; but it should be further understood
spaced above and in vertical alinement with the
recess l3 and centered to correspond with the re 10
that slight departures from such contours, such,
for‘ instance, as some little irregularity about the
spective centering of the projection l4 and the
?nger l8. Ordinarily, in headers of the type
shown, the space below the recess l3 correspond- '
ing to the location of the finger l8 when pro
jection i4 is in a recess corresponding to recess i3 15
is merely an open space, but, according to the
. outer margin or free edge of the thimble 20 as
present invention, provision is made for engaging
seen in Figure 4, or some slight ?attening of the
parti-globular or rounded inner end thereof asv
20 in Figure 3 is not of any materiality, such irregu
the thimble 2t on the finger i8 and stripping the
larity being effectively corrected in the next suc
ceeding steps of the process.
It is important that the amount of material in
same therefrom while beneath the die 8. ‘ Ac
cordingly, a detent is provided for the thimble 20
that‘ allows the free movement of the finger. To
this end, an appropriate framework 2? is ar
ranged beneath the die 3 andprovided with slide
the blank or slug, such as seen in Figure 2, be sub-_
P stantially that required for the completed article.
and it will, of course, be understood that when
the slug or fragment of wire, as seen in Figure 2,
way or opening 29 through which the ?nger it
is employed, the operation begins with the cut
ting off of the slug from the supply wire or rod
may freely move. That is to say, the passage
way 2% is of a su?lcient diameter to permit free
30 seen at El.
This supply wire or rod M is passed
between the feeding rolls 22 ‘which are part of
plates 28, it, each having a semi-circular notch.
at its inner end facing the corresponding notch 25
of the other slide plate so as to provide a passage
movement of the ?nger alone through said pas
the standard equipment of the header machine,
sageway. The slide plates 28, however, are pro
vided with inclined or conical walls it, 38, lead
and the wire or rod is extended through the .cut
off die 9 where the protruding end portion is sev
ing to the aperture 29, the said walls being pro
portioned and located during operation to be
1 ‘ ered by the cross stroke of the shearing bar ill.
The spring ?nger ll resiliently stresses the por
30
struck by the rounded or globular end of the‘ ,
thimble 2@ as the ?nger iii approaches the recess
tion being out off against the shearing bar it
and continues to frictionally hold the slug after
41)
is. The slide plates 28 are preferably feathered
or tongue-and-groove connected in the frame El
it is severed while the bar it is functioning as a to slide freely longitudinally therein, and a spring
carriage to move the slug over into line with the ~ 30 stresses each of the slide plates toward thev 40
recess’ l3. Properly timed with this movement
other to keep the ends of the slide plates in abut;
the plunger die 5 approaches and begins to press ment when not forced apart. A guide pin 32 is
the slug i6 into the recess 93, and thereupon bar preferably provided for each spring 3i and ex
ill moves back and spring ?nger ll releases the , tends from frame 2? into and along the respec
sing and rides over plunger 5 back to again en
tive coiled spring 3i a'distance sufllcient to retain
gage the protruding end portion of wire ‘it. Wire and guide the spring in its movements.
M is of course fed through the die 9 into position ~ Thus, when the die block 2 makes it first stroke,
for being cut off for supplying the next sing in ' the projection it compresses'and shapes the ma
timed relation to the other movements of the ma
terial in the recess l3 and then the die block
chine. It should be understood that the feeding recedes, the material being left in the recess it. 50'
rolls 22 and .cut-off die 9 (as well as the shear
The die plungers b and 6 are then shifted upward
ing bar Ill" and spring ?nger II) are standard until ?nger i8 is brought into .line with the
equipment of well known types of headers for‘ use recess 53, and then the die block 2 makes its
in the making of nails, screws, bolts, and the like, second stroke during which the finger i8 enters
and that the feeder. rolls 22 are provided with. the recess is and ?ows the material therein to 55
appropriate adjustment and control devices for the thimble-like shape to produce the thimble 20,
, feeding forward the desired and requisite quan
tity only of the wire or rod 2| to be severed by
the shearing bar l0. Wire or rod 2| may be steel,
copper or other material according to the prod
not desired.‘
A knock-out pin 23 is part of the standard
equipment of a header, and, in the present con
as above stated.
Then the die plungers 5 and '
6 recede and descend to bring the projection ii
in line with recess l3 for the next ?rst stroke.
However. in making this next ?rst stroke, the 60
?nger i8 carrying the thimble 2B causes the
rounded end of the thimble to strike the beveled
walls 30 and thus wedge the slide plates 28 apart
struction, extends through the die 8 and axially - against the stress of springs 3i until the abrupt
- into the recess it, said pin extending through a
end of thimble ill, that is the end having the 65
portion of the framing ‘l’ in position to be en
opening of the recess within the thimble, passes
gaged by the free end of an actuating lever 26, the rear faces of the plates is incident to the
pivoted at 33 to swing in timed relation to the ,ppening and closing movement of plates 23. Said
strokes of the die block 2 to cause the pin 23 to
plates thus become a direct detent'for the thim
have a knock-out stroke at every alternate stroke
ble 20. With the next return movement of plung 70
of die block 2 as the die ?nger it} is receding. ’ er 8, the edges of the thimble strike said detent
However, the said knock-out pin 23 and its and the thimble is thereby stripped from the
operation are largely only precautionary, since finger it and allowed to drop into a chute or
the thimble 20, when completed about the finger other receiver located below and not shown.
g3. iii, usually clings to the finger with a frictional_
While I have disclosed herein an advantageous 75
I
4
2,120,649
and practical form of machine embodying the
will be carried away from the female die by the,
features of the invention, it is to be understood
?nishing plunger die, and a stripper formed and»
that the disclosed machine is to be taken as
mounted to engage the ?nished blank as the
illustrative only and that it is my intention ‘to
claim the invention broadly in whatever form its
blank is carried forward by the finishing die at
the non-forming stroke of said die, and to strip
the blank from the die as the die recedes fol
lowing such non-forming stroke.
principle may be utilized.
What is claimed is:-
>
'
.
1. In mechanism for forming thimble-like
shells in the production of capped nuts, the com
bi'nation with double-stroke header mechanism
and a stationary matrix die therein having a‘
dome-shaped cavity," of plunger dies cooperating
with the matrix die, one of the plunger dies
' being shaped to snugly ?t within the matrix die
15 'and having a bulbous extension for producing a
centering depression in a slug or mass of metal
forced by said plunger die into the matrix die,
and the other plunger die having a ?nger-like
extension proportioned to enter the said center
20 ing depression and shape the mass in the matrix
die into an elongated, domed, thimble-like shell
having substantially the same external domed
' shape as the internal shape of the matrix die
cavity.
25
,_
~
.
2.. The combination as claimed in claim 1 with
means for stripping the thimble-like shell from
the ?nger-like extension 5as an incident of the
non-forming stroke of said extension.
3. The combination as claimed in claim 1 with
means alined with and spaced below the matrix
die for receiving the ?nger-like extension carry
ing a thimble-like shell incident to the stroke
of the plunger die having the bulbous extension
into the matrix die, the said receiving means for
the ?nger-like extension and shell being resilient
ly stressed for interposing a detent in the path
of the shell for stripping the shell from the ?nger
'40
like extension with the return stroke of the latter.
4. In a machine for forming thimble-like
capped nut blanks from slugs of metal, in com
bination, a stationary female die, a double stroke
plunger, a pair of plunger dies carried‘ by the
plunger, the ?rst being a preliminary forming die
6. In
a machine for forming
thimble-like ,
capped nut blanks from slugs of metal, in com
bination, a stationary female die, a double stroke 10
plunger, a pair of plunger dies carried by the‘
plunger, the ?rst being a preliminary forming
die for cooperating with the female die to shape
a blanket a ?rst or preliminary blank forming
stroke, and the second being a ?nishing die for 15
cooperating with the female die to further shape
the blank to thimble-like form at a second or
?nishing forming stroke, and each havi mg a non
formlng stroke with the plunger, out of aline
ment with the female die, at the forming stroke 20
of the other, the construction and arrangement
being such that a blank placed in the female die
is acted upon successively by the plunger dies
and is then carried away from the female die
by the ?nishing plunger die, and a pair of lat 25
erally yieldable stripper members formed and
mounted to be engaged and cammed apart by a
?nished blank carried forward by the ?nishing
die at the non-forming stroke of said die, and
to engage behind the blank and strip it from the 30
die as the die recedes following such non-form
ing stroke.
'
7. In a machine for forming thimble-like
capped nut blanks from slugs of metal, in com
bination, a stationary female die, a double stroke 35
plunger, a pair of plunger dies carried by the
plunger, the ?rst being a preliminary forming
die for cooperating with the female die to shape
a blank at a ?rst or preliminary‘ blank forming
stroke, and the second being a ?nishing die for 40
cooperating with the female die to further shape
the blank to thimble?like form at a second or
?nishing forming stroke, and each having a non
forming stroke with the plunger, out of aline
ment with the female die, at the forming stroke 45
stroke, and the second being a ?nishing die for of the other, the construction and arrangement
cooperating with the female die to further shape being such that a blank placed in the female
_the blank to thimble-like form at a second or vdie is acted upon successively by the plunger
?nishing forming stroke, and each having a non
dies and is then carried away from the female
forming stroke with the plunger, out of aline
die by the ?nishing plunger die, and a pair of 50
ment with the female die, at the forming stroke of laterally yieldable stripper slides formed and
the other, the construction and arrangement be
mounted to be engaged and cammed ‘apart by
ing. such that a blank placed in the‘ female die is a ?nished blank carried forward by the ?nish
acted upon successively by the plunger dies and ing die at the non-forming stroke of said die,
is then carried away from the female die by the and to engage behind the blank and strip it 55
?nishing plunger die, and a stripper formed and from the die as the die recedes following such
mounted to engage the ?nished blank as the non-forming stroke.
blank is carried forward by the finishing die
8. In a machine, for forming thimble-like
at the non-forming stroke of said die, and to strip capped nut blanks from slugs of metal, in com
60 the blank from the die as the die recedes fol
bination, a stationary female’ die having a dome
lowing such non-forming stroke.
shaped cavity therein, a double stroke plunger,
_ 5. In a machine for forming thimble-like
and a pair of plunger dies carried by the plunger,
capped nut blanks from slugs of metal, in com
the ?rst being a preliminary forming die for
bination, a stationary female die, a double stroke cooperating with the female die to shape a blank
plunger, a pair of plunger dies carried by the at a first or preliminary blank forming stroke, 65
plunger, the first being a preliminary forming and the second being a ?nishing die for coop
die for cooperating with the female die to shape erating‘wlth the female die at a second or ?n~
a blank at a ?rst or preliminary blank form of ishing forming stroke to further shape the blank
stroke, and the second being a ?nishing die for to a domed, thimble-llke form having an external
~70 cooperating with the female die to further shape‘ contour substantially the same as the, dome 70
the 'blank to thimble-like form at a second or shaped cavity of the female die and having an
?nishing forming stroke, and each having a non
internal contour substantially the same as the
forming stroke with the plunger, out of aline
external contour of the ?nishing die.
ment with the female die, at the forming stroke
9'. In a machine for forming thimble-like
75 of the other, means for assuring that the blank capped nut blanks from slugs of metal, in com
for cooperating with the female die to shape a
45 blank at a ?rst or preliminary blank forming
2,120,049
'
5
male die at a second or ?nishing stroke to further
binatlon, a stationary female die having a dome
shaped cavity therein, a double stroke plunger, shape the blank to a domed, thimble-like form
and a pair of plunger dies carried by the plunger, having an external contour substantially the
same as the dome-shaped cavity of the female
the ?rst being a preliminary forming die for 00
operating with the female die to shape a blank die and having an internal contour substantially
at a ?rst or preliminary ‘blank forming stroke, the same as the external contour of the ?nishing
n
and the second being a ?nishing die, having a die.
HEYMAN ROSENBERG.
rounded leading end, for cooperating with the fe
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