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Патент USA US3033360

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May 8, 1962
w, R, STEWART ET AL
3,033,350
PRODUCT DECELERATOR
Filed Feb. 1, 1960
2 Sheets-Sheet 1
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May 8, 1962
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3,033,350
PRODUCT DECELERATOR
Filed Feb. 1, 1960
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2 Sheets-Sheet 2
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United States Patent O?ice
3,033,350
Patented May 8, 1,962
1
2
3,033,350
A frame structure 27 for an upper movable pressure
roll 29 is mounted on a column 30 and extends inwardly
therefrom. The frame structure 27 includes an inwardly
PRODUCT DECELERATOR
William R. Stewart and Charles G. Bosco, Sterling, 111.,
assignors to Northwestern Steel & Wire Company,
Sterling, 111., a corporation of Illinois
extending inclined frame member 31 having parallel legs
33 extending inwardly therefrom having spaced bearing
strips 35 extending along the insides thereof, forming
Filed Feb. 1, 1960, Ser. No. 5,731
9 Claims. (Cl. 198-127)
guides for a generally U-shaped support 36 for a shaft
37 for the upper pressure roll 29, for guiding the roll
This invention relates to improvements in product de
29 to move in alignment with the roll 15, toward and away
celerators and more particularly relates to decelerators
from the roll 15. A shaft or rod 39 extends upwardly
for decelerating rolled products, such as, bars and the - from the U-shaped support 36 through the frame mem
like.
her 31, and is encircled by a spring 40 interposed between
A principal object of the invention is to provide
the underside of the frame member 31 and the upper
a simpli?ed means for decelerating the products from
side of the U-shaped support 36, and biasing the roll 29
rolling mills and the like in a much shorter space than 15 to engage a traveling bar or rod 41 kicked from the cool
has formerly been possible, where the products have
ing bed 10 onto the retarding or decelerating roll 15, to
been allowed to come to a sliding friction stop.
A further object of the invention is to provide a sim
e?ect a drive to said roll.
'
The pressure roll 29 is moved away from the roll 15
pli?ed decelerator for the products of rolling mills and
and is held out of position to engage said roll by means
the like, in which a dynamically braked roll driven by the 20 of a solenoid 42 including a solenoid coil 43 having an
traveling product serves to decelerate and bring the
armature 44 extending therefrom. The armature 44 has
product to a stop.
a bifurcated connector 45 secured to and extending from
A still further object of the invention is to provide
the lower end thereof along opposite sides of a ?attened
an improved form of decelerator for the products of roll
portion 46 of the shaft 39, and pivotally connected
ing mills and the like, in which the product is moved 25 thereto as by a pivot pin 47. The solenoid coil 43‘ is
onto a roll coupled to an unpowered direct current motor,
deenergized when the bar 41 has been kicked onto the
and in which the motor is connected to dynamically
brake the roll and bring the product to a stop.
decelerating roll 15, to accommodate the spring 40 to
move the upper pressure roll 29 into engagement with a
traveling bar on the decelerating roll 15 and to press the
decelerator for rolling mills and the like, utilizing a 30 bar into engagement with the decelerating roll 51 to effect
~ Still another object of the invention is to provide a
decelerating roll coupled to an unpowered direct current
a drive to said decelerating roll.
motor for supporting the moving product, and utilizing
a yieldably pressed roll to press the moving product into
In FIGURE 2 of the drawings, the motor 16 is shown
as having an armature 50 and a series ?eld 51 connected
engagement with the decelerating roll, as the product
in a closed circuit. A resistor 53 is also connected in
comes into engagement with the decelerating roll, and by 35 the closed circuit in series with the armature 50 and ?eld
so connecting the motor electrically as to dynamically
51. A switch 54 is provided to adjust the resistor 53
brake the decelerating roll and the product moving there
to adjust the armature resistance, and the torque gener
ated by the traveling bar 41, and to thereby adjust the
along.
rate of deceleration on the traveling bar.
These are other objects of the invention will appear
from time to time as the following speci?cation proceeds 40
A separately excited shunt ?eld 55 is connected with
and with reference to the accompanying drawings
two main line conductors 56 and 57 through switches 58
wherein:
and 59 in respective of said main line conductors. The
shunt ?eld 55 has a permanent resistance 60 in series
FIGURE 1 is a fragmentary vertical sectional view
taken through a product decelerator constructed in ac 45 therewith and a variable resistance 61 in series with said
permanent resistance. The variable resistance is pro
cordance with the invention; and
vided to adjust the ?eld strength and to thereby adjust the
FIGURE 2 is a wiring diagram of the product decelera
torque developed by the decelerating roll 15 and the
tor and the means for accommodating the upper roll to
length of travel of the bar 41, in accordance with the
come into engagement with the product.
v
,
.
In the embodiment of the invention illustrated in the 50 amount of torque developed.
It may be seen from the foregoing that the unpowered
drawings, we have shown in FIGURE 1 a cooling bed
motor 16, connected to operate as a generator is rotatably
10 for the products of rolling mills, such as, bars and
driven by the traveling bar 41, pressed into engagement
the like, in which the sheared products come directly from
with the decelerating roll 15 by the pressure roll 29, and
the rolling mill onto rolls 11 spaced along the cooling
bed, and are kicked laterally from the roll line, by a 55 that the armature 50 of the motor 16 will be rotatably
driven as fast as the roll 15 rotates, the speed of the rota
kick-off device 12, diagrammatically shown in FIGURE
tion of the armature 50 being limited by the amount of
2, along a skid trough 13 onto a retarding or decelerat
torque generated by the decelerating roll 15. It may fur
ing roll 15, coupled to an unpowered direct current motor
ther be seen that the ‘amount of torque generated may be
16. The cooling bed 10 and skid trough 13 are shown
as being mounted on legs or supports 17 and 18 respec 60 adjusted by adjusting the armature resistance 53,.or by
adjusting the resistance of the separately excited shunt
tively. The leg 18 is shown as having a platform 19
extending inwardly and forwardly therefrom having a
stand 20 for the decelerating roll 15, bolted or otherwise
secured thereto. The stand 20 has inclined legs 21 and
22 of unequal length, extending angularly upwardly there
?eld 55, and that the travel on the bar 41 in'feet is limited
by the amount of torque developed.
65
x’
I
The bar 41 is kicked off the cooling table 10 by means
of the kick-off 12 diagrammatically illustrated in FIGURE
2.. The kick-off 12 may be of any well known form and
from and forming bearing supports for a shaft 23 for
is diagrammatically shown in FIGURE 2, as including
the retarding roll 15. An inclined platform 25 extends
a horizontal shaft 64 having a series of paddles 65 ex
downwardly from the platform 19 and forms a support
tending radially therefrom. The shaft 64 is so located
for the motor 16, coupled to the shaft 23 by a suitable
with regard to the cooling table 12 that the paddles 65 .
coupling 26, providing a direct connection between the 70 will kick the bar from the cooling table onto the decelerat
retarding roll 15 and the unpowered direct current
ing roll 15 during rotation of said shaft for a part of a
motor 16.
revolution. The shaft 64 may be driven by a suitable
3,033,350
4
0
motor (not shown), under the control of suitable control
concepts of the invention, as de?ned by the-claims ap
means, such as, an electric eye (not shown), or any other
well known form of control means.
The shaft 64 is diagrammatically shown in FIGURE 2
pended hereto.
as having a cam 66 thereon.
The cam 66 comes into en
gagement with a movable switch arm 67 of an open switch
69, to momentarily close said switch as the bar 41 is
kicked off the cooling table 12 onto the roll 15 and to
We claim as our invention:
1. In a device for decelerating the linear travel of the
products from rolling mills and the like, a decelerating
roller along which the product rides, an unpowered direct
current motor directly connected with said roller, a sec
ond roller pressing the traveling product into engagement
with said decelerating roller, to effect a drive from the
accommodate said switch to open as said cam moves by
said switch. The switch 69 is connected with the con 10 product to said decelerating roller, said motor being con
nected to dynamically brake said decelerating roller upon
ductors 56 and 57 of the direct current exciting circuit
the driving of said decelerating roller and motor by the
for the shunt ?eld 55, and serves to energize a coil 70 of
product, and to thereby decelerate linear travel of the
a time delay relay 71 when closed, to open a circuit
product.
through contacts 73 in an alternating current energizing
2. In a decelerator for the products from rolling mills
circuit for the solenoid 43.
15
and the like, a roller along which the product rides, kick
As shown in FIGURE 2, the contacts 73 when closed,
off means for kicking the traveling product onto said
Complete an energizing circuit to a relay coil 75 through
roller, a second roller, means biasing said second roller
conductors 76 and 77 in an alternating current energiz
into engagement with the traveling product and biasing
ing circuit for the solenoid coil 43. Closing of a circuit
through the contacts 73 will energize the relay coil 75, 20 the traveling product into driving engagement with said
?rst roller, a solenoid for withdrawing said second roller
and effect opening of contacts 79 and 80 in a conductor
from said ?rst roller upon the absence of a traveling
81, connecting the conductor 77 with one terminal of the
product on said ?rst roller, switch means actuated by said
solenoid 43. The other terminal of the solenoid 43 is
kick-off means for deenergizing said solenoid upon the
connected with the conductor 76 through a conductor 83.
Thus, when the cam 66 trips the switch 67 to close the 25 kicking of a traveling product onto said ?rst roller, and
an unpowered direct current motor directly connected
contact 69 and energize the relay coil 70, an energizing
with said ?rst roller, said motor being driven by said ?rst
circuit will be completed to the relay coil 75, to open the
roller and the traveling product and connected to dynam
contacts 79 and 80 and deenergize the solenoid coil 43
ically brake said ?rst roller upon the driving of said ?rst
and accommodate the spring 40 to bias the pressure roll
29 into engagement with the bar 41.
30 roller and motor by the traveling product.
3. In a decelerator for the products from rolling mills
The cam 66 is so arranged as to kick the switch arm
67 to close the circuit through the contact 69 and then
and the like, a roller along which the product rides, a
motor directly connected with said roller, said motor
to accommodate movement of said switch arm to an open
being an unpowered direct current motor and being Con
position to accommodate the circuit through said con
tacts to open and deenergize the relay coil 70. The relay 35 nected to dynamically brake said ?rst roller upon the
driving of said ?rst roller by the traveling product, a
71 is a time delay relay and when energized effects de
second roller in spaced relation with respect to said ?rst
energization of the solenoid coil 43 and holds the solenoid
coil 43 deenergized until the tail end of the product or
roller, spring means biasing said second roller to engage
the traveling product and effect the driving of said ?rst
rod 41 has passed between the rolls 15 and 29. The
time delay relay 71, working against its decaying ?ux, may 40 roller by the traveling product, a solenoid energizable
be adjusted in accordance with the length of the travel
ing rod or product traveling along the cooling bed, to as
to move said second roller against said spring means away
roll 15, which will in turn drive the direct connected un
decelerating roll, an exciter ?eld for said motor, a direct
current exciting circuit for said ?eld, a pressure roll en
from said second roller, a time delay relay connected in
the energizing circuit for said solenoid to effect the de
sure that the rod is held into engagement with the retard
ing roll for the full length of the product being retarded.
energization of said solenoid and the engagement of the
It may be seen from the foregoing that as the rod 41 45 traveling product with said second roller, a switch in the
energizing circuit to said time delay relay, and means
is kicked oil the cooling table 12, the cam 66 will close
operated upon the engagement of the traveling product
the switch 67 for a sut‘?cient length of time to energize
the time delay relay coil 70 to etfect deenergization of the
with said ?rst roll to close said switch and energize said
time delay relay, to effect engagement of said second roll
solenoid coil 43 in a sufficient time delay interval, to ac
cornmodate the spring 40 to engage the top roll 29 with 50 with the traveling product for the length of the traveling
product.
the traveling rod and bias the traveling rod into engage
ment with the retarding roll 15, to drive said roll. The
4. In a device for decelerating the products from roll
switch 67 will then be instantaneously opened, but the
ing mills and the like, a decelerating roll along which a
time delay relay 71 will hold the solenoid coil 43 de
traveling product is adapted to ride, an unpowered dy*
energized for the length of travel of the rod between the 55 namic braking direct current motor directly connected
rolls 15 and 29.
with said roller, a cooling table, kick-off means for kick
The traveling rod 41 will then drive the decelerating
ing a traveling product ‘from said cooling table onto said
powered motor 16 in accordance with the torque generated
by said decelerating roll. The dynamic braking e?ect of 60 gageable with the traveling product and pressing the
the motor 16 will thus tend to increase the torque gen
traveling product into engagement with said pressure roll,
erated by the traveling rod 41 as the decelerating roll 15
and a control circuit for said pressure roll actuated by
and motor 16 are rotated by at increased speeds by the
said kick-0E means for bringing said pressure roll into
traveling rod, with a resultant resistance to rotation of the
engagement with the traveling product as the traveling
decelerating roll 15, and a decrease in speed of travel of 65 product is kicked onto said decelerating roll, and for
the traveling rod 41. The length of travel of the rod 41
retractably moving said pressure roll as the retreating
will thus be limited in feet by the amount of torque de
end of the traveling product passes by said pressure roll.
veloped, which may be adjusted by adjusting either the
?eld or armature strength by the adjustable resistances
5. A device for recelerating the products from rolling
mills and the like in accordance with claim 4, wherein
61 or 53 respectively, to stop travel of the bar at a pre 70 the control circuit for the traveling product is energized
determined point.
through said exciter circuit.
While we have herein shown and described one form in
6. A device for decelerating the products from rolling
which our invention may be embodied, it may readily be
mills and the like in accordance with claim 4, wherein
understood that various modi?cations and variations in
the direct current motor has an armature and series ?eld
invention be attained, without departing from the novel 75 connected in the closed circuit, wherein a variable re~
3,033,350
5
6
9. In a decelerator for the products ‘from rolling mills
and the like, a ?rst roller along which the rolled product
rides, a second roller spaced from the ?rst roller, means
biasing said second roller into engagement with the travel
sister is connected in series with said armature to vary
the armature strength of said motor, and the torque gen
erated by said decelerating‘roll, and wherein a variable
resistance is connected in said exciter circuit in series with
said shunt ?eld, to vary the ?eld strength of said motor,
ing product and biasing the traveling product into engage
and the torque generated by said decelerating roll.
7. A device for decelerating the products from rolling
ment with said ?rst roller, electrically energizable means
connected with said second roller for withdrawing said
second roller from said ?rst roller upon the absence of
mills in accordance with claim 4, wherein a solenoid hav
a traveling product on said ?rst roller, an electrical ener
ing an armature operatively connected with the pressure
roll is provided to retractably move said pressure roll 10 gizing circuit, means connecting said electrical energizing
circuit with said electrically energiza‘ole means upon
with respect to the traveling product, wherein the control
movement of the traveling product away from said ?rst
circuit controls energization and deenergization of said
roller to energize said electrical energizable means and _
solenoid and includes a normally open switch in said
effect the withdrawal of said second roller from said ?rst
energizing circuit and momentarily closed upon operation
of said kick-off, and a time delay relay energized to effect 15 roller, and a direct current unpowered dynamic braking
motor directly connected with said ?rst roller and driven
deenergization of said solenoid upon closing of said switch
by said ?rst roller and the traveling product -for retard
and holding said solenoid deenergized for length of travel
ing rotation of said ?rst roller and travel of the traveling
of the traveling product on said decelerating roll.
8. A decelerator for decelerating the products ‘from
rolling mills in accordance with claim 7, wherein an alter 20
nating current circuit is provided to energize said solenoid,
and wherein the time delay relay in the direct current
control circuit effects the braking of said alternating cur
rent circuit for a predetermined time delay interval, and
the deenergization of said solenoid for the length of travel 25
of the traveling product.
/
, product.
References Cited in the ?le of this patent
UNITED STATES PATENTS
733,901
Case ________________ __ July 14, 1903
2,134,373
2,336,052
Parker _______________ __ Oct. 25, 1938
Anderson _____________ __ Dec. 7, 1943
2,850,140
Selvin et al. __________ .3 Sept. 2, 1958
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