вход по аккаунту


Патент USA US2124967

код для вставки
July 26, 1938.
Original Filed Nov. 22, 1935
Patented July 26, 1938
George Woodward, West Orange, N. J., assignor
to Igoe Brothers, Newark, N. J.
Application November 22, 1935, Serial No. 50,998
Renewed January 4, 1938
1 Claim. (01. 205-20)
This invention relates to a wire drawing ma
chine that accomplishes two or more succes
sive drawings of the same Wire in a continuous
process and accomplishes this by substantially
equalizing the tension on the wire throughout
its drawn length.
The machines formerly employed for this pur
pose were expensive and unsatisfactory. The ex
pense was caused by complicated mechanism such
as differential gearing and other means of com
pensating for the speed of the wire as it is drawn
by one drum on its ?rst drawing and then drawn
and coiled on the second drum. In order to se
cure uniformity of ?nish and size the tension
15 of the wire is maintained by the present ma
The invention is designed to provide an eco
nomical machine which requires no differential
gearing since both drums can be rotated at the
20 same speed at which the wire is moving which
allows them to be driven on the same shaft.
This economizes in space and power.
The manufacture of wire from bars leaves the
wire with a scale which must be removed. The
25 scale is removed after the pickling process by
water under pressure and the wire is then al
lowed to stand and a green coating forms on the
wire. The coating is washed off lightly and the
wire is then put into a hot lime bath. The wire
30 is then racked and dried. This leaves the wire
with a thin coating that acts as a lubricant when
the wire passes through the die. The present
device by rotating the drums at a speed constant
with the speed of the wire prevents any scraping
35 of this coating and this in turn assists in the
drawing due to the presence of the coating and,
in consequence, the dies last longer and the
drawing is easier and more satisfactory.
The invention also relates to certain details
40 of construction which will be hereinafter more
fully described.
The invention is illustrated in the accompany
ing drawing.
Figure l is a diagrammatic view
of my improved machine. Figure 2 is a side view
45 of the two drawing drums with the lower part
shown in section. Figure 3 is a bottom view of
?gure 2 with the bottom plate removed.
A diagrammatic view is presented in Figure 1,
showing a die H] which is the ?rst die through
50 which the wire passes and a second die ll through
which the wire is drawn. a second time. The
wire is drawn through the ?rst die [0 by a drum
l2 and is returned to the second die, usually over
a pulley I3 and then drawn through the die H
55 by the drum I4.
The wire passes around the drum [2 three or
four turns and on the drum I4 it is coiled into
the coil I5 for the proper length to provide the
required size of coil and then removed as the
product of the machine. The drums l2 and I4
rotate at the same speed and are usually secured
together or to the same shaft I6.
The drum I4 is a convenient drum usually with
a tapered periphery and of considerable height
with a projecting apron I l at the bottom.
The 10
top is open to permit the lifting and removal of
the coil l5 of wire when the coil has reached
the desired or predetermined weight.
The drum I2 is designed to include a slipping
or lost-motion feature to slip in order to prevent 15
the drum l2 passing along more wire to the sec
ond die than the drum M can take. This must
be done without injury to the wire on the drum
l2. The construction must be such‘ that the wire
engaging part of the drum I2 rotates at a speed 20
that is the same as the speed of the wire in
order that no scraping takes place to remove the
coating from the wire.
The form of drum i2 is preferably made of 0
a top plate l8 and a bottom plate l9 secured 25
together, as by the screws 20. One of the plates
has an annular ?ange or wall 2! extending to the
other plate.
Outside this Wall is the slip ring
22 usually made up of sections 23 that are are
shaped and normally slightly separated as at 24.
This clearance allows the sections to- move in
wardly to a limited extent. The two plates 18
and i9 have opposed ?anges 25 and 26 which
con?ne the ring sections 23 against outward
movement. If desired, I may place an annular 35
backing 2'! in the form of a ring or split ring,
this backing being of material such as of asbestos, '
?bre, or the like or any resilient means that is
compressible such as springs. This drum, with
or without the ring 21, allows the sections 23 to 40
move inwardly to slightly reduce the diameter of
that part of the drum that receives the coil,
that part being the periphery of the slip ring
formed by the sections 23. The ?anges 25 and
26, particularly the latter, act to prevent coating 45
from the wire from working in behind the rings
or segments 23. The presence of the coating
on the inside face of the parts 23 causes them
to bind and they will not slip on the wall 2|.
In order to prevent this andvinsure slipping of 50
the parts under pressure the ?anges, especially
the ?ange 26 acts to ward off and collect the
coating which does not enter behind the ?ange
nor behind the split ring parts.
It will be evident that in the event of excess 55
drawing by the drum I2 the increased tension
on the few laps of wire on the slip ring will
cause the tension on the wire coming from the
die [0 to be relaxed and no excess of wire will
be fed to the die H or the drum M to cause any
looping of the wire between these elements of
the machine and the wire passing around with
the drum I2 will not be subjected to any scrap
ing to remove the coating.
I claim:-—
A drum for wire-drawing machines compris
ing a top plate and a bottom plate, one of said
plates having an annular wall extending to the
other plate, means for securing said plates to
gether, a sectional slip-ring surrounding said
Wall, said ring having a recess on the bottom 5
edge of its outer wall, a ?ange on the bottom
plate and ?tting said recess, a ?ange on the top
plate overlapping the top edge of the ring, and.
a resilient medium between the wall and the
Без категории
Размер файла
230 Кб
Пожаловаться на содержимое документа