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Патент USA US2405738

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Aug. 13, 1946.
Filed OQt. 28, 1942‘
Sheets-Sheet l
O_. _o_ I
l o_J‘I
1,-#1.M 1I.l
Aug. 13, 1946.
Filed Oct. 28, 1942
4 sheets-sheet 3
Filedloct. 28, 1942
‘4 Sheets-sheaf,
Patented Aug. 13,1946
Harold v. Dettman, Riverside, 111.
Application October 28, 1942, Serial No.463,586
2 Claims.
(01. 153-41), :
My invention has for its object to provide a
simple, economical and effective machine for
feeding the metal sheet in step by step time move
folding sheet metal or the edges of sheet metal
plates, whereby the same may be utilized for in
terlocking seam units between the plates.
Another object of my invention’ is to provide a
machine having reciprocative jaws carrying male
Figure 6 is a still further‘modi?ed form of my
forming machine wherein companion pairs of
cranks impart reciprocative movement to the jaws
followed by a horizontal feed movement of said
and female articulated dies, whereby a fold or
seam element is progressively developed through
Figure "7 is a fragmentary plan view of the
a series of biting or stamping movements of the
jaws, combined with a relative movement between
the sheet to be stamped and said machine, where
by the successive steps to complete the seam ele
ment are effected.
the stamping movement of the jaws and for
FiguresB to 13 inclusive illustrate modi?ed
sectional views of the seam forming dies wherein
the metal is shown progressively from itsinitial
Another important object of my invention is
to provide the die carrying stamping jaws with 15
die step to its ?nal die forming step.
eccentric power means, whereby the jaws will
pleted double seam between sheets of metal which
progressively form a seam element on the edge
of a sheet and provide a relative feed movement,
may be formed by my apparatus.
between the jaws and sheet following each
stamping movement.
Figure 14 is a sectional view through a com
Figure '15 is a sectional view of another pos
sible form of seam wherein theinterlocking edges
20 are simply in U form.
Figure 16 is another sectional view of a pos
A further object of my invention is to provide
sible seam v‘wherein the sheet metal plates are
eccentric actuating means fOr the stamping jaws,
positioned at right angles to each other and
whereby said eccentrics will impart a combined
locked by a seam.
stamping and feeding movement for the sheet
25 Figure 17 is a diagrammatic view of a modi?ed ~
metal Worked upon.
form of fold or crimp at the edge of a sheet metal
A further object of my invention is to provide
the relative reciprocative jaws with a lineal die
Figure 18 is a plan View of the same.
for each jaw of the male and female type,
wherein the lineal dies are gradually formed in 80 Figure 19 is a diagrammatic modi?ed form of
a plurality of changing contours from the initial
my invention wherein a sheet of metal curved or
in drum formation may be provided, with edge
Or ?rst die unit, to the completing or last die unit,
seams in accordance with my invention.
whereby the sheet of metal, as it travels between
Referring by characters to the drawings i and
the dies in a succession of stamping movements,
2 represent upper and lower companion drive
will progressively complete the seam element.
shafts geared to a power shaft 3 whereby the com~
With the above and other minor objects in view,
panion shafts are rotated in synchrony. The
the invention consists in certain peculiarities of
drive shafts are mounted in a suitable frame and
construction and combination of parts as will be
as best shown in Figures 1 and 2 they terminate
fully set forth hereinafter with reference to the
accompanying drawings and subsequently
with eccentric ends 4-4 and 5-5 respectively.
Mounted upon the companion eccentrics is an
In the drawings:
upper die bed 6 and a lower die bed ‘i which die
beds carry a series of male and female dies ,8
Figure 1 represents a sectional elevation of a
and 9 progressively developing a seam element
forming machine embodying the features of my
45. from the ?rst die to the ?nishing die in the series.
The frame, as shown,‘ may be provided witha
Figure 2 is a plan view of the same with parts
table 8' for the support of a sheet of metal A,
broken away and in section.
the edges of which are adapted to be folded to ef~
Figure 3 is a sectional end view of said ma
chine, the section being indicated by line 3-3
of Figure 1.
Figure 4 is a side elevation with parts in sec
tion illustrating a modi?ed form of machine for
folding the edges of sheet metal.
Figure 5 is another modi?ed form of the ma
chinewherein independent means is utilized for 55
feet a seam element as said edges pass through
the stamping machine.
As indicated in Figure 3 of the drawings, the
metal sheet A may in some instances be guided
top and bottom by rollers B extending from the
frame of the machine.
The above described simple exempli?cation of
my machine will operate asrfollows and may be‘ '
best understood by referring to the diagrammatic
tion of the cranks in the direction of the arrows, ,
said die beds will be caused to articulate and
form the ?rst step in the seam. The next quarter
of the revolution of the cranks will cause the
beds, in their biting union to move and feed the
views Figures 8 to 13.
The thin metal sheet is ?rst fed under the
initial die element in straight form at the time
when the eccentrics have opened up the die beds,
as the eccentrics close the die beds, a short sec
sheet forward the length of the die operation,
the next quarter movement of the cranks will
tion of the sheet edge will be stamped with slight
offsets which are primary and initially intended
to form a seam and hence as the die beds are
rapidly rotated by the eccentrics in the direction
cause the upper die beds to lift and disengage
the metal worked upon and upon such disengage
ment, the cranks I‘! will complete the cycle by a
of the arrows, this vibratory movement causes a
sheet of metal to be fed forward slightly at the
point of biting of the dies and when the dies are»
opened they will vibrate backwardly and “take
another bite of the material and so forth until
the complete fold is affected, by the movable
series of progressive male and female dies as
shown in the Figures 8 to 13 referred to.
In these diagrams the fold is shown, as what
might be termed a double lock seam, and when -
completed the other sheet seam element, will be
interlocked as shown in Figure 14. In other
words, the interlocked sheet may be a seam
wherein two sheets of metal are secured upon a
?at plane or one of the sheets maybe at a right
angle to its companion sheet.
wardly and upon the next quarter of the revolu
Referring to
Figures 15 and 16 of the drawings a single seam
is shown completed, which can be readily formed
by providing the proper movable die bed.
Figures 17 and 18 show a modi?ed form of a _
sheet of metal subjected to dies to produce a
corrugated edge, it being understood that these
progressive dies may be formed in a single sheet
or in blocks suitably attached‘to the die beds.
While I have shown and described the sheets
and dies arranged to be mounted in“ ?at forma
tion, it is understood that the edges of such sheets
may be curved or in cylindrical form in place of
rearward reciprocative ?nal movement, for the
next bite of the sheet metal edge.
The above exempli?cation of my invention i1
lustrates simply another form of utilizing the bite
between the male and female die members for
feeding the sheet, step by step to be seamed.
Referring now to Figure 5 of the drawings a
still further modi?ed form of my invention is
exempli?ed, wherein I employ one cam controlled
means for causing the bite or stamping action
between the mold members and an independent
means for feeding the sheet of metal step by step
as it is worked upon by the reciprocative mold.
In this instance, the upper pair of drive shafts
l-—| have mounted thereon armed eccentrics 18
connected by a link l9. A roller 15’ extending
from the front end of the link 19, engages a
double track cam 20 suitably mounted upon the
drive shaft 2| revolvable in bearing with which
the frame is provided. The upper bed 22, carry
ing the die formations is held in its open position
by counter balance springs 23 engaging ‘guide
dowels 24 which serve to hold the die bed in a
vertical reciprocative action, The lower die bed
25 is ?xed and may constitute part of the ma
chine frame.
The sheet of metal A in this instance is fed
between upper and lower gripping jaws 26, linked
the flat, in which case the die beds and dies would
to an oscillating lever 21, The lower end of the
be curved to conform to the drum metal operated 40 lever 21 is connected to a similar lever 28 pivoted
upon as indicated in Figure 19.
at the opposite end of the machine frame and the
From the foregoing description it will be noted
upper end of this last mentioned lever has a roller
that the slight eccentrics are to be driven at a
29 which also engages the double cam track 20.
very high speed and the same will cause a rapid
When the parts are in the position shown in Fig
vibration in a forward direction to feed the mate
ure 5, upon further, rotation of the cam wheel the
rial and said feeding stroke is quite short, hence
sheet feed mechanism will move the sheet A one
the progressive die formation, from end to end
step forward followed by a die stamping operation
of the series, would increase in a ?owing manner
through movement of the lever cams l8, caused by
or progressively corresponding to the short feed
outward travel of the roller l9’ carried by the
distance of the dies.
link i9 to the outer surface of said cam wheel 20.
In some instances it may be desirable to in
Hence, we have demonstrated that means may be
crease the speed of the seaming operation and
provided for independently feeding the sheet of
this can be done by increasing the distance of the
metal to be worked upon, It will also be apparent
feed of the sheet between each die stamping op
that I may utilize stripper ?ngers X, which will
extend through the lower bed, and are carried by
illustrates upper and lower die beds l0 and H.
the reciprocative upper bed 22, whereby the sheet
The lower die bed I I is reciprocatively mounted
of metal after each forming operation may be
upon guide rollers l2 extending from the frame
positively stripped from the bite between the
and said bed is provided with dowels l3 which ex
male and female dies.
tend through apertures in the upper die bed l0
Referring to Figure 6 of the drawings, I have
whereby said companion sets of beds are recipro
illustrated a mechanism similar to that shown in
cated in unison. The upper‘ die bed H) is formed
the upper reciprocative die bed in Figure 4 of the
with ears l4 having cam tracks l5 therein,
drawings. In this form of my invention I provide
adapted to be engaged by rollers l6 carried by
a reciprocative lower die bed H’ with companion
rotating cranks H, which are formed at the end
cams 15' similar to the upper cams in all respects.
of thedrive shafts l-—l, which shafts are actuated
In this exempli?cation of the invention, with the
by any means for imparting timed rotation there‘
synchronized crank shafts put into operation, the
From the foregoing description with reference
to Figure 4, when the sheet of metal is fed be-,
tween the dies the initial formation of the seam
will be of greater length or of the same length as
the initial die bite. Hence, when the cranks are
dies will ?rst be brought together for stamping,
followed by a forward feed movement for'the
sheet during the biting action of the dies. When
the forward feed movement is completed the
cams will cause the'dies to open vertically, where
by the metal is freed from the bite and said beds
in the position shown in Figure 4, the die beds 75 will now move rearwardly preparatory to a second
have been fed to their extreme position rear‘
downward compression movement between the
upper and lower beds and is positively affected by
the synchronized cams.
While I have shown various modi?ed forms of
an eccentric shaft engaging the ear apertures of
at least one of the jaws, and vertical guide means
connecting the jaws.
2. A machine for feeding and folding the edges
mechanisms for carrying out my invention, it 5
f sheet metal, a pair of superimposed elongated
should be understood that I reserve the right to
jaws, apertured ears extending therefrom, a com
vary the means for carrying out my invention
plementary series of equi-distant spaced die units
within the scope of the claims.
I claim:
of di?erent character extending from each jaw,
1. A machine for feeding and folding the edges 10 an eccentric shaft engaging the ear apertures of
at least one of the jaws, and guide pins extending
of sheet metal, a pair of superimposed elongated
from one jaw in slidable engagement with the
jaws, apertured ears extending therefrom, a com
companion jaw.
plementary series of equi-distant spaced die units
of different character extending from each jaw,
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