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Патент USA US3020014

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Feb. 6, 1962
Filed Dec. 1, 1959
2 Sheets-Sheet 1
Feb. 6, 1962
Filed Dec. 1, 1959
2 Sheets-Sheet 2
United States Patent
Patented Feb. 6, 1962
coil, is adjust-ably arranged and inclined on the machine
frame. Thus it becomes possible selectively to produce
radially extending grooves or grooves running obliquely
Hermann Jaun, Regensdorf, Switzerland, assignor to
Elehtro-Motoren A.G., Zug, Switzerland
to the radial direction.v
Filed Dec. 1, 1959, Ser. No. 856,602
Claims priority, application Austria Dec. 15, 1%?!
‘4 Claims.
Further features of the invention will appear from the
following description and claims, taken in conjunction
with the accompanying drawing, with reference to which;
(Cl. MIL-56.8)
I Especially for the manufacture of electric disk-armature
the invention is disclosed hereinafter
example, and wherein:
motors, it is known to wind a strip, which is provided
purely by ‘way of
with recesses punched at distances apart, to a coil, on 10
FIG. 1 shows a front view of the most important parts
which the punched recesses form radially or spirally ex
of a form of embodiment of the arrangement‘ in ac
tending grooves. Into these grooves the electric windings
cordance with the invention;
of the motor can be laid.
PEG. 2 represents a sectional view on the line II-I'l of
Since the perimeter of the strip coil increases with every
turn, the recesses in the strip must be punched at gradually
FIG. 1, on a larger scale;
FIG. 3 shows a portion of the arrangement, partly in
top view and partly in section on the line Ill-“III of
FIG. 1, likewise on a larger scale;
increasing distances apart.
For solving this problem, it is known to produce
grooved strip coils in such a way that a winding mandrel
FIG. 4- represents a detail of the arrangement, as seen
for the strip is each time, between two consecutive punch
ings, rotated thru a predetermined angle, the spaced re 20
lation between the punching place and the rotary axis of
the winding mandrel being increased with growing diam
eter of the coil, ‘and the strip kept in contact with a recti
linear guide which is tangential to the coil and touches
from the rear thereof; '
FIG. 5 shows in top view a portion of a strip provided‘
with punched recesses;
FIG. 6 shows diagrammatically the preparing of a
strip coil radially grooved by means’ of the arrangement;
PEG. 7 illustrates in a similar way the formation of a
The arrangement as shown in the drawing includes a
punching machine as a main component, whose design is a
an imaginary plane substantially intersecting the punching 25 strip coil with obliquely extending grooves.
‘In machines of the type known heretofore, the punch
ing unit is movable relative to the winding mandrel, the
latter being stationarily disposed at least in the horizontal.
This design, however, suffers from serious disadvantages,
inasmuch as the punching unit is comparatively heavy and
subjected to steadily changing forces which, in the long
run, areliable to ?atten the guides, thus deteriorating them
and even rendering them unserviceable, unless particularly
stout and hence expensive constructions are provided. it
should be borne in mind that, depending on the thickness
of the sheet and the size of the grooves, the punching
pressure may range, say, from two to ?ve tons.
The invention also relates to an arrangement for pro
ducing strip coils of the type, differing, however, from the
prior art essentially by the fact that the punching place is
stationarily located, and the winding mandrel rotatably
supported on a slide guided along a rectilinear track, so
that the rotary axis of the mandrel moves in a plane which
known per se and need only be disclosed here quite rough~
1y. According to KG. 1, the machine comprises ‘an under
30 frame 10 with a carrier table 11.
Mounted on the latter
are upstanding tubular guides 12, each accommodating
a vertically displaceable bar 13. The lower ends of the
bars 13 are interconnected by a yoke 14 ?xed thereto by
means of nuts 15. A bearing portion of the yoke 14 has
a connecting rod 17 which is rockably mounted thereon
by means of a horizontal axle 16 and also arranged on
a crankpin 18. The crankpin 13 is eccentrically connected
to a shaft (not visible in the drawing) which, by means
of bearing pieces 19, is rotatably located beneath the
4:0 table ii and associated with a driving motor (not shown).
Said shaft further carries a sprocket wheel 20 which is
referred to later on.
The upper ends of the bars 13 are connected to each
other by a yoke 22 ?xed thereto by means of nuts 23. A
substantially intersects the punching place ‘and is inclined 45 threaded bore in the yoke 22 is engaged by a vertically
with respect to the surface of the guide rail, and that said
running and ‘axially displaceable screw-bolt 2-4. This‘
slide is under the in?uence of a weight or of a spring
screw-bolt carries at its lower end a holding device 25
for an exchangeable punching tool 26. A matrix as-'
place, keeping thereby the strip coil being formed in en
sociated with the tool 26 is exchangeably mounted on a
gagement with the guide rail.
50 holder 28 being in turn located on a block 29 supported
tension adapted to draw the slide towards the punching
The punching place being stationary, a usual punching
unit may be used, having any desired precision and work
ing speed. Hence, no correspondingly more expensive
special constructions of the punching unit will be needed.
and ?xed on the table 11.
Disposed on the table 11 is a winding device which
forms another main component part of thearrangement
and is described hereafter. A substantially frame-like
The continually changing mechanical forces occurring 55 supporting member 31 is mounted on the table 11 by
when punching, are directly absorbed by the frame of the
means of a bracket-like foot 32. Said member 31 com
punching unit and need not be transmitted through guides
prises two parallel guide rails 33 (FIGS..2 and 3) be‘
for displacing the punching unit. Since the latter is in
tween which, by means of rollers 35, a slide 34 is dis
every case many times heavier than the winding mandrel
placeably guided along a rectilinear track inclined at an
and the strip coil being formed, it is thus preferable to 60 angle to the horizontal.
have the punching unit arranged stationary and the man
drel displaceable. The means for rotating the winding
Rotatably mounted on slide 34 is a shaft 36 whose axis
extends horizontally and at right angles to the direction
mandrel may be of smaller dimensions than those for driv
of movement of the slide. The front end of the shaft
ing the punching unit; also for this reason it is preferable
36 carries a removable and exchangeable winding man
to have the Winding mandrel arranged displaceable, and 65 drel 37 which is ?rmly connected thereto by means of
the punching unit stationary. Therefore, through the ar
a screw 38. Mounted on the other end portion of the
rangement according to the invention much more favor
shaft 36 is a ratchet wheel 39 engaged by a pawl 40
able kinematic conditions will result throughout than with
under its force of gravity or by reason of the power of a
the machines known heretofore. Hence a higher work
spring (not shown), FIGURES 2, 3 and 4. The pawl
ing speed is also possible.
70 40 is fulcrumed on a bolt 41 at the end of a lever 42‘
According to another advantageous feature of the
loosely arranged on shaft 36 and hence swingable with
present invention, the guide rail, engaged by the strip
respect to the latter.
A nut 43 screwed onto the rear
end of said shaft and a disk 44 prevent the lever 42 from
sliding off the shaft 36, without the lever 42 having to
be clamped. Moreover, by means of a bolt 45 (FIG. 4)
the slide 34 has rockably mounted thereon a pawl 46
which, as biassed by a torsion spring (not shown), en
gages the ratchet wheel 39 to secure the same from turn
ing contrary to the arrow R.
weight acting upon the draw-member 68, the mandrel
37 lies not far from the tool 26 at the guide surface 75
of the guide rail 71. When the punching machine is set
in operation, the crank 18 will cause the frame formed
of the bars 13 and yokes 14, 22 to move vertically up
and down by means of the connecting rod 17, the tool
26 following this movement.
At each downward move
ment of the tool 26, it penetrates the strip 85 and punches
Through the joint pin 48, the lever 42 is pivoted to
a recess or aperture in it (FIG. 5).
one end of a connecting rod 47, the other end of which
Through chain 65, the sprocket wheel 20 drives the
engages a crankpin seated on a sliding or clamping piece 10
sprocket wheel 64 which in turn causes the shaft 57 jour
49 (FIG. 3). The latter engages a groove 51 with under
naled in slide 34 to rotate through the intermediary of
cut ?anks diametrically arranged on a wheel-disk 50,
and is adjustable in the longitudinal direction of said
groove for the purpose of altering the crank arm (FIG.
4). However, by means of a screw 52, said piece 49
can be secured in any set position, without the connecting
rod 47 being thereby clamped on the crankpin. The
wheel-disk 50 is seated fast on a shaft 53 which runs
parallel to shaft 36 and is rotatably carried in slide 34,
as shown in FIGS. 1 and 3.
A bevel-gear 55, integral with wheel-disk 50, meshes
another bevel-gear 56 which, according to FIG. 3, rides
on one end of a shaft 57 which extends parallel to the
direction of movement of the slide 34 and is also rotat
ably supported thereon. Said shaft 57 possesses an ex
tension 58 of non-circular cross-section. The extension
58 has for this purpose two longitudinal grooves 58a
which are engaged by two so-called driving keys 59.
Said extension can be moved axially across a sleeve 60
having said keys arranged thereon. The sleeve 60 can
be turned, but is secured from axial displacement on the
carrier member 31 and forms the hub of a bevel-gear
the pair of bevel-gears 61, 62. This pair of bevel-gears
61, 62 drives the wheel-disk 50 which imparts to lever
42 a reciprocatory rocking movement by means of the
connecting rod 47. In the rocking movement in one
sense, the pawl 40 loosely slides over the teeth of the
ratchet wheel 39 whereas in the rocking movement in
the other sense the pawl 40 ?rmly engages the teeth of
the ratchet wheel 39, thus displacing the latter angularly
to a certain extent in the sense of the arrow R in FIG. 4.
The number of revolutions of the wheel disk 50 corre
sponds to that of the crankpin 18 of the punching ma
chine, and the movement of the lever 42 carrying the
pawl 40 is synchronized with the movement of the tool
26, so that rotation of the ratchet wheel 39 and hence
of the winding mandrel 37 takes place whenever the tool
26 is over the matrix 27 and strip 85. Rotation of the
mandrel 37 each time causes a portion of the strip 85 to
be wound thereon, so that the tool 26, in its next down
ward movement, makes a recess which is displaced a
certain amount from the preceding one in the longitudinal
direction of the strip 85.
If it is required that the recesses made in the strip coil
31, said shaft further carrying a sprocket wheel 64 as 35 85 being produced should form, say, eight radially ex
61. The latter meshes another bevel-gear 62 which is
seated on a shaft 63 rotatably supported on the carrier
Through an
tending grooves 88 (FIG. 6), the sliding and clamping
open-link chain 65, the sprocket wheel 64 is coupled to
the aforementioned sprocket wheel 20 of the punching
set in such a way that each time, between two successive
punchings, the mandrel 37 is rotated through a constant
draw-member 68 which, for instance, is a wire-rope.
angle of
can be recognized from FIGS. 1 and 2.
shoe 49 in the groove 51 of the wheel-disk 50 has to be
The slide 34 has anchored thereto one end of a ?exible 40 angle of 45 degrees or, in general terms, through an
The draw-member 68 runs over a guide roller 69 rotat
ably mounted on the machine frame and is at its other
end loaded with a weight (not shown) which tends to
move the slide 34 upwards and towards the punching
tool ‘26.
Attached to the table 11 is a holding angle-iron 70
where n=the number of grooves to be made in the strip
coil. The winding mandrel and subsequently the strip
coil under formation lie against the guide face 75 and
perform a generating movement thereon upon rotation
(FIGS. 1 and 2), having a guide rail 71 adjustably and
of the mandrel. With increasing diameter of the coil 87,
?xably located thereon. The angle-iron 70 has to this
effect an arcuately extending groove 72 which is engaged 50 it travels along the plane 80 always farther away from
the punching place. Because of the guide face 75 being
by a suitably curved spur 73 of the guide rail 71. The
inclined at an angle 83 relative to the plane 80, along
center of curvature of the groove 72 and of the spur 73
which the axis of the mandrel 37 can move, for every
are substantially at the punching place of the punching
momentary diameter of the coil 87 quite a de?nite posi
machine, that is to say where the longitudinal median
axis of the tool 26 intersects the upper bearing face of 55 tion of the mandrel will result. In the described man
ner, the axis of the mandrel 37 is guided so that the angle
the matrix 27. A screw 74 permits of clamping the spur
89 between the plane 89 and the strip portion 85 running
73 in the set position on the angle-iron 70. At top the
tangentially onto the coil 87 being formed, remains in
guide rail 71 has a rectilinear ?at guide surface 75 on
variably the same and has the same size as the angle 83.
which the winding mandrel 37 or the coil being formed
60 The place, on which the strip 85 runs onto the coil 87 has .
thereon can rest.
then always the same angular position relative to the axis
As the slide 34 is displaced along its track, the axis
the winding mandrel 37. By properly selecting the
of the mandrel 37 moves in a plane 80 (FIGS. 6 and 7)
angle of inclination 83, corresponding to the thickness
which substantially intersects the longitudinal axis 81 of
of the strip 85, it will be achieved that in all turns of the
the tool 26 at the punching place. The guide surface
75 touches an imaginary plane 82 which also intersects 65 coil the recesses 86 will come to lie exactly over each
other and thus form radially extending grooves 88.
substantially the longitudinal axis 81 of the tool 26 at
For making strip coils with a different number of
the punching place and is inclined relative to the plane
grooves, all that need be done is to alter the setting of the
80 at an angle 83 (FIG. 6) or 84 (FIG. 7).
sliding and clamping shoe 49 at the wheel-disk 50, but
With the arrangement described hereinbefore, strip
70 not the inclination of the guide face 75 as long as the
coils with grooves can be made as follows:
thickness of the strip to be wound remains the same.
A strip 85 consisting, say, of sheet-iron, is drawn from
If the ‘guide rail 71 is set in another way so that its guide
a stock roll (not shown), passed through between the
face 75 with respect to the plane 80, along which the axis
tool 26 and matrix 27 of the punching machine and stuck
with its ?rst end into a slit 37a of the mandrel 37 for
of the mandrel 37 is movable, makes an angle of inclina
anchoring it (FIG, 1). Under the in?uence of the
tion 84 (FIG. 7), which is greater or smaller with respect
to the aforementioned angle 83, the recesses 86 made on
the coil 87a will form grooves 88a which extend obliquely
.drel through a predetermined constant angle each time
between two consecutive punching actuations of said
or spirally in one or the other direction in relation to the
punching device, a rectilinear stationary guide rail having ,
a guide surface extending in a second plane substantially
intersecting the punching place at an acute angle with
respect to the ?rst-mentioned plane, and means for urging
radial direction.
Also in this case, the angle 90 between the plane 80
and the strip portion running tangentially onto the coil
being formed remains constant and of the same size as
said slide along said track toward the punching place
the angle 84, The angular position of the place, at which
maintaining thereby the strip‘ coil under formation on
the strip 85 runs onto the coil 87a, also remains unchanged
said winding mandrel in tangential contact with said guide
with respect to the axis of the mandrel 37.
10 surface of the guide rail.
t has to be mentioned‘ that in all cases described here
2. A machine for producing strip coils with grooves
inbefore, the guide face 75, with respect to the strip por
formed by recesses punched into the strip being wound,
tion running tangentially to the mandrel 137 or to the coil
according to claim 1, in which a machine frame is pro
87 or 87a under formation, is inclined at an angle twice
,vided, the guide rail being adjustable and ?xed on the
as great as the plane 80‘ along which the axis of the man 15 machine frame to permit altering the inclination of the
drel 37 can be moved. Per se it is, however, also pos
guide surface with respect to the track for guiding the
sible to arrange the guide face 75 over the mandrel 37 so
as to cause the strip portion 85 running onto the coil under
3. A machine for producing strip coils with grooves
formation to run along the guide surface. Then, how
ever, there is the inconvenience of continuous friction be
tween the strip and the guide surface.
The guide surface 75 need not necessarily be ?at, but
could, for instance, also be curved cylindrically, provided
the guide surface extends rectilinear and touches the imag
inary plane 82 which intersects the axis of the tool 26
substantially at the punching place.
While the form of embodiment of the invention as
formed by recesses punched into the strip being wound,
according to claim 1, in which a driving shaft is provided
which rotates continuously and which extends parallel to
the track on which the slide moves, the winding mandrel
being operatively connected to the driving shaft which is
‘in turn connected to the operating means of the punching
25 device in any position of the slide.
4. A machine for producing strip coils with grooves
formed by recesses punched into the strip being wound,
according to claim 1, in which a continuously rotating
understood that some other changes may be made in- the
driving shaft is provided which extends parallel to the
arrangement, construction and combination of the vari 30 track for guiding the slide, the winding mandrel being
ous parts, and it is our intention to cover by our claims
operatively connected to the driving shaft which is in
herein disclosed, constitutes a preferred form, it is to be
such changes as may reasonably be included within the
turn connected to said operating means of the punching
scope thereof.
device in any position of the slide, and in which a rotat
What I claim is:
able sleeve is provided, the driving shaft being displaced
1. A machine for producing strip coils with grooves 35 together with the slide and is provided with an extension
formed by recesses punched into the strip being wound,
of non-circular cross section which, in any position of
comprising a stationary punching device, operating means
the said slide engages the rotatable sleeve which permits
for said punching device, a slide, a rectilinear track for
‘axial displacement of the extension and forms the hub of
, guiding the slide, a coil winding device having a winding
a wheel connected to a shaft of the punching device.
mandrel rotatably supported on the slide so that on mov
ing the slide along the track the rotary axis of said man
drel moves in a plane which substantially intersects the
punching place of said punching device, a mechanism
actuated by said operating means for rotating said man
References Cited in the ?le of this patent
Anderson ____________ __ July 12, 1938
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