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Патент USA US2105951

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Jan. 18, 1938.
Filed Feb. 5, 1955
2 Sheets-Sheet l
BY gmx/éq
Jan. 18, 1938.
' ‘ 2,105,951‘
Filed‘ Feb. 5, 1935
2 Sheets-Shee‘t 2
v w“
V .
Patented Jan. 18, 1938
David G. Morgan, San Francisco, Calif., assignor
of one-fourth to Noble Mahlmann and one
fourth to Edward J. O’Leary, San Francisco,
Application February 5, 1935, Serial No. 5,018
2 Claims. (01. 164—13)
My invention relates to spring making appa
ratus, and more particularly to apparatus for
making leaf springs for vehicles, such as auto
It is among the objects of my invention to
provide means for simplifying and speeding up
the various operations involved in the manufac
ture of leaf springs.
Another object of my invention is to provide
10 improved means for cutting the hot bars into
blanks, and for punching the blanks.
The invention possesses other objects and fea
tures of advantage, some of which, with the fore
going, will be set forth in the following descrip
15 tion of my invention. It is to be understood
that I do not limit myself to this disclosure of
species of my invention, as I may adopt variant
embodiments thereof within the scope of the
Referring to the drawings:
Figure 1 is a front elevational View of the
cutting and punching machine.
Figure 2 is a detail view taken in the direction
of the arrow 5 of Figure 1, and shows the feed
Figure 3 is a vertical sectional view through
the bed of the cutting and punching machine
taken in a plane indicated by the line 6-6 of
Figure 1, and illustrates details of the bar stop
and punch die positioning means.
Figure 4 is a plan view of the bed of the cut
ting and punching machine.
In terms of broad inclusion, the apparatus
embodying my invention comprises means for
cutting into blanks the bars from which the
35 springs are to be made; means for feeding the
hot bars past the cutting means; means for
punching the blanks; means for adjustably posi~
tioning the punching means longitudinally of
the blank being cut; and means dependent on
the length of bar fed past the cutting means for
actuating the cutting and punching means.
In greater detail, the machine comprises a
frame 24 having an opening 26 at one end
through which the hot bars may be fed into the
machine. This feeding is effected by a pair of
drive rollers 21, the lower of which is positively
driven and the upper of which is mounted for
movement toward and away from the lower
50 roller.
Figure 2 shows this feed roll construction.
The lower roll 21 is carried by a suitable drive
shaft 28, and the upper roll is slidably mounted
in the brackets 29 and is controlled by a hand
55 lever 3 I. The upper roll 21 is normally held
away from the lower roller by a spring 32 con
nected to the end of the lever 3|.
After a heated bar is withdrawn from the
furnace, one end is placed on the lower drive
roller 21. When it is desired to feed the bar for- 5
ward the operator brings down the handle 3| to
grip the bar between the rollers. This causes
the lower roller to frictionally engage the, bar
and drive the latter. At any time it is desired
to stop movement of the bar the operator merely 10
has to release the handle 3|.
The means for cutting the bar or strip into
blanks comprises a cutting die 33 mounted on
the bed of the machine adjacent the drive rollers
21. As shown in Figure 1 the die is supported
by a block 34 slidably mounted transversely of
the bed on a frame member 36. The upper part
31 of the'cutting die is carried by a block 38
slidably mounted in a reciprocating head 39.
By this arrangement the dies operate to cut the .20
bar or strip when the head 39 moves down
As better shown in Figure 4, the die block 34
is provided with a handle 41 by which the block
may be moved transversely across the bed of the
machine. The block 34 preferably carries a pair
of different shaped cutting dies 33; one for cut
ting a square ended spring and the other for
cutting a diamond pointed spring. The com
plementary dies 31 on the upper die block 38 30
are shifted simultaneously with the positioning
of the lower dies. This is accomplished by an
upright arm 42 secured to the lower die block
and slidably connected with the upper block, so
that the blocks may be adjustably positioned
simultaneously, while at the same time permit
ting verticalmovement of the upper dies.
Reciprocating head 39 is operated by a suit
able crank shaft mechanism 43 designed to bring
the head down and then return it to an upper 40
position of rest, in accordance with usual punch
press operation. The drive mechanism for the
reciprocating head 39 may be operated from a
foot treadle 44 connected with the clutch 46 of
the drive mechanism by a rod 41. This manually
operated control is used to give the diamond
shape to the leading end of the bar. That is, a
new bar being fed into the machine is stopped
when the forward end overlies the cutting die 33.
at which time the foot treadle 44 is depressed
to actuate the reciprocating head 39 and cut the
diamond shape on the leading end of the bar.
Means are provided for automatically operat
ing the head 39 during the subsequent cutting
of the strip or bar into blanks, and means are 55
also provided for adjustably controlling the
length of the blanks being cut, it being under
stood of course that some spring leaves are of
different lengths than others. As best shown in
Figure 4, a pair of longitudinally extending
ing die 69. A passage 1| is also provided through
the carriage for dropping out the punchings. The
punching die 69 is located between the plates 48
and 49 so that it underlies the strip being fed
through the machine. A complementary punch
plates 48 and 49 are provided along the bed of
the machine. These plates provide supports for
ing die 72 is provided on the under side of a block
the bar as the latter ‘is fed through the machine.
The plate 48 is ?xed and is supported at one end
10 by a suitable block 5| and at the outer end by
a block 52. The outboard supporting block 52'
head 39. This block is mounted for movement
with the carriage by a strap 14 secured to the car
is mounted on an extension 53 of the machine
The other plate 49 is slidably mounted on the
15 supporting blocks 5| and 52. As shown in Figure
1 the outer end of the plate 49 terminates in a rod
54 slidable through the block 52 and is provided
with an encircling spring 56 compressed between
the end of the plate and the supporting. block.
13 which is slidably mounted on the reciprocating
riage and slidably connected with the block. By
this arrangement the upper die block 73 will. be
shifted along the head 39 when the carriage is
moved along the bed of the machine, while at the
same time the block 13 may reciprocate vertically
with respect to the carriage.
The position of the carriage and the punching
dies carried thereby is changed by means of a gear
wheel 16 meshed with a rack Tl provided on the
under side of one of the runners 67. The gear is
20 This spring urges thegplate toward its normal . rotated by a hand wheel 18 mounted on the outer
position. A stop lever 51 is slidably and pivotally
mounted on the ?xed plate 48 on a suitable bar
58 supported at the ends of theplate. ' Thus the
stop may be moved to any desired position along
the plates.
As best shown in Figures 3 and 4, a plurality of
lugs 59 are provided along the movable plate 49.
These lugs may be set in selected positions and
locked by means of bolts 6| slidably engaging a
T-slot 62 in the heavier forward edge of the plate
49. By setting these lugs in predetermined spaced
positions, the stop lever 51 may be quickly set in
one of several predetermined positions, in each of
these predetermined positions the stop lever will
35 be spaced a certain predetermined distance from
the cutting-die 33 located at the forward end of
the machine.
Referring again to Figure 1, a ?xed lug ‘63 is
provided on the bottom of the slidable plate 49
40 adjacent the clutch operating rod 41. A comple
mentary lug 64 is secured to the’ rod under the
lug 63 so that when the plate 49 moves to the right
the rod 41 is forced downwardly to actuate the
reciprocating mechanism. Both lugs are provided
45 with complementary tapered surfaces so that the
action in pressing down the rod 41 is'smooth.
With this structure in mind it will be seen that
a bar or strip may be fed into the machine until
the leading end strikes the stop 57. I When this
happens the operator controlling the feed rollers
by his pressure on’ the handle 3| carefully feeds
the bar slightly further ahead until the recipro
cating mechanism operates to cut the strip. The
blank thus formed may then be removed from the
55 machine, so that an additional length of strip may
be fed into the machine to out another blank. As
shown in Figure 4 the cutting die 33 is designed to
simultaneously shape both the trailing and lead
ing ends of the strip material.
Means are also provided for punching the hole
in the center of the blank simultaneous with the
cutting operation, and means are provided for
adjustably positioning the punching means so
that the hole may be centered for different lengths
65 of the blanks. As shown in Figures 1 and 3, a
carriage 66 is movably mounted along the bed of
the machine by supporting runners 67. The upper
face of the carriage lies substantially flush with
the bed and is provided with a groove for slidably
receiving the enlarged portion of the plate 49. As
shown in Figure 3 the plates 48 and 49 slidably rest
on the surface of the carriage, so that the latter
may be shifted relative to the plates.
As also best shown in Figure 3, the carriage 66
75 is provided with asocket 68 for receiving a punch
end of the gear shaft 19. A plurality of position
ing lugs 8| are adjustably mounted on the periph
ery of the hand wheel by suitable bolts 82 slidably
engaging a groove 83 in the wheel. A spring
pressed pin 84 is slidably mounted in a bracket 86 25
provided on the front face of the carriage, and is
arranged to snap into the sockets provided by the
lugs 8 |. By this arrangement the carriage may be
shifted along the bed of the machine, and held in
a selected position of adjustment by the locking 30
pin 84.
The positioning lugs 8| are adjustably set in
spaced positions about the periphery of the vhand
wheel 18 in accordance with the positions of the
lugs 59 on the plate 49. As shown in Figure‘l
the lug 8| with which the pin 84 is engaged is
set so that the punching dies 69 and 12 are posi
tioned half-way between the cutting die 33 and
the stop 51. The other lugs 8| on the wheel 18
are arranged to position the ptuiching dies cen v40
trally of the blank being cut for the several ‘ ~'
positions of the stop 51. For example, if the stop
is moved to the next position toward the left of
the position shown in Figure 1, then the hand
wheel is turned clockwise to engage the pin 84
with the next lug 8|.
Of course it is understood that the lug 51
moves slightly to the right before the reciprocat~
ing mechanism is operated to cut the strips. Con
sequently the carriage is arranged to position the
punching dies midway between the cutting die .59
33 and the position of' the stop 51 when the
reciprocating mechanism is actuated. When the
blank is taken from the machine it is properly
shaped at both ends and is also provided with the
desired hole centrally of the ends. The clip holes ‘55
at the ends of the blank are formed by a second
pair of punching dies 81 on the outer portions
of the carriage 66 and die block 13. A guide yoke
88 is preferably provided on the forward portion 60
of the carriage for centering the end of the blank '
over the die 81. Thus when the operator takes
the blank from the bed of the machine he in
serts an end of the blank between the outside
punching dies, so that the next time the recipro
cating head operates the end hole is punched.
I claim:
1. A spring making machine comprising a bed
for supporting a strip from which springs are to
be made, means for feeding the strip over the
bed, means for cutting the strip to form a blank,
a slidable frame extending longitudinally of the
bed, means responsive to movement of said frame
for actuating the cutting means, an adjustable
stop on said frame and positioned in the path of
9,105,95 1
movement of the strip, whereby engagement of
the moving strip with the stop shifts the frame
to actuate the cutting means, and setting means
on the frame for holding the stop in a selected
position of adjustment to effect cutting of the
strip into a ‘blank of predetermined length.
2. A spring making machine comprising a bed
for supporting a strip from which springs are to
be made, means for feeding the strip over the
bed, means for cutting the strip to form a. blank,
a stop having a plurality of positions of adjust
ment and mounted on the bed in the path of
movement of the strip for actuating the cutting
means, whereby a blank of selected length de
pending upon the position of adjustment of the
stop is cut from the strip, means interposed be
tween the cutting means and said stop for punch
ing the blank, a carriage for the punching means,
and means associated with the carriage for indi
cating the central position of the punching means
between the cutting means and said stop for each
of the several positions of adjustment of the 10
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