US2066377A - Coil holder - Google Patents

Description

R. .1. WEAN ET AL Jan. 5, 1937.

COIL HOLDER Filed 001;. 17, 1955 5 Sheets-Sheet l Jan 5, 1937.

R. J. WEAN ET AL COIL! HOLDER Filed Oct. 17, 1935 Fig.4.

BOTH LEFT 46 BOTH IN BOTH RIGHT 5 Sheets-Sheet 2 Jan. 5, 1937- R. J. WEAN ET AL 2,066,377

COIL HOLDER Filed Oct. 17, 19:55 5 Sheets-Shee 5 BOTH RIGHT BOTHIN 65 67 BOTH LE FT INVENTORS Patented Jan. 5, 1937 UNITED STATES FFICE COIL HOLDER Raymond J. Wean and Donald Warren, Ohio, assignors to Th neering Company, Incorpora a corporation of Ohio A. McArthur, e Wean Engite'd, Warren, Ohio,

I Application October 17, 1935, Serial No. 45,414

9 Claims.

This invention relates to a device for holding coiled material and, in particular, coiled strip .mgflterial, although it has other applications as w v y In the manufacture of steel strip, after hot rolling, the partly reduced strip is coiled for delivery to various points for subsequent processing. In the subsequent processing, e. g., pickling, the coiled hot rolled strip must be unwound and passed through the treating apparatus in strand form. The particular object of the present invention is to provide means for supporting a coil of such strip while being unwound for subsequent processing.

Holders for coiled strip material of various kinds have been known heretofore. In one such device, a pair of centering heads are disposed on a common actuating screw coaxial therewith. One of the heads must be removed from the screw, however, to permit a coil to be slipped over the end of the latter. This arrangement is not satisfactory for the purpose described above because of the difliculty in positioning the coil on the support. Other forms of coil holders have therefore been developed, specifically, a device including a pair of movable standards, each having a centering head projecting toward the other,

' and a common screw for adjusting the standards toward and away from each other, the screw be- 8 jgurnaled in a suitable base and parallel to butspaced from the axis of the heads. When the hot rolled strip has not been coiled accurately, because of camber in the strip, or for some other reason, it is desirable to try to remedy the conditionby drawing thecenteringhead together. Since the screw which effects this result is oil-center with'respect to the axis of the heads, the supporting standards tend to tilt, permitting the centering heads to depart from a true coaxialrelation, and as a result the centering heads bind the coil between them and prevent unwinding.

We have invented acoil support which overcomes objections to the types aforementioned, in that it includes spaced centering heads having a free space therebetween, whereby a coil can be moved into coaxial relation therewith from points laterally of the axis of the heads. The heads are adjustable toward and away from each other and the means for causing such adjustment is coaxial with the heads, so that there can be no misallnement of the latter or binding of the coil between them. In addition, we provide means for lifting a coil into position between the heads and turning it to the desired 56 position for starting the unwrnding. A further feature of our invention is the provision of means for adjusting the coil axially in case the strip being delivered therefrom tends, because of camber therein or for some other reason, to depart from the desired direction of delivery. 5 Such means automatically maintains the strip coming off the coil in a predetermined delivery line, which facilitates its passage through various treating apparatus, such as pickling and washing baths and the like.

In order to cause corresponding adjustment of each centering head, we provide means, preferably electrical forv tying together the adjusting means therefor. Independent adjustment of the two heads is also permitted. 15

A present preferred embodiment of the invention is illustrated in the accompanying, drawings from a consideration of which together with the following detailed description, a complete understanding thereof can readily be obtained. 20 In the drawingsa Figure 1 is a diagrammatic side elevfifilgn; Figure 2 is a view partly in section and artly in elevation, to enlarged scale, of a portion bf the apparatus shown in Figure 1;

2! Figure 3 is a partial sectional view along the 0 line III-III of Figure 2;

Figure 4 is a circuit diagram showing one form of automatic control system;

Figure 5 is another circuit-diagram showing a 3 further form of control system; and

Figure 6 is a diagrammatic view illustrating a detail of theautomatic control system.

Referring now in detail to the drawings and, for the present, to Figures 1 through 3, standards 35 III are mounted in spaced relation on a suitable foundation I-l. Each standard has spaced bearings l2 through which a tubular-thrust member I3 is axially slidable. A trunnion i4 is secured to'the inner end of each thrust member and is 40 provided with a head l5 rotatably mounted thereon by anti-friction bearings i6. Each head l5 has a coil engaging flange or diskl 5a. The heads l5 have rearward extensions l1 serving as brake drums. Brake bands l8 disposed about the ex- 45 tensions I! are secured to the trunnions'by links IQ for exerting an adjustable force retarding rotation of the heads. Each head is provided with a plurality of collars 29 of graduated sizes whereby the heads can be accommodated to coils hav-. 50 ing central openings of diiferent diameters.

Each of the thrust members l3 has an adjusting screw 2|. The inner ends of the screws 2| are journaled in-thrust bearings formed in webs 22 extending across the thrust members. The other 2 g I 2,000,377 I ends of the screws are coupled tdthe shafts of dynamo-electric machines 23 and 23' carried on shelves 24 attacheddzo the outer ends of the thrust members.

Each thrust member has a longitudinal slot 25 therein. A projection 26 extends upwardly from each standard iii through the slot 25 and carries a nut 21 through which the screw 2| is threaded. A dynamo-electric machine 28 may be vdisposed on one of the shelves 24 and coupled, for example, to the machine 23 for a purpose which will appear hereinafter. y L

A lifting saddle 29 is disposed in a pit ill between the standards Ill and comprises a base 3| mounted on screw jacks 32 and adapted to be raised or lowered thereby. A pair of spaced coil supporting rolls 33 are journaled on the base 3| in suitable bearing posts 34. A motor II is mounted on the base ii for driving one of the rolls 33 through a chain 5 rocket connection I. A motor 31 mounted be ween the screw Jacks 32 drives them through worm and worm wheel reduction gears 28.

The operation of the apparatus so far described will now be briefly reviewed. The centering heads I! are normally retracted by suitable operation of the screws 2|. A coil to be supported for unwinding is then deposited. by means of acrane,

' for example, on the saddle 29 which is normally in its lowermost position. The coil is indicated x diagrammatically at ll. After the coil has been deposited on the saddle, the latter is raised by operation of the motor 21 until the opening through the coil is substantially inline with the axes of the centering heads.- The motor II can then be operated to turn the coil slightly one direction or the other if necessary,- ln order to position the outer end properly for entry into the treating apparatus. The centering heads are then advanced toward the coil by means of the screws 2 I The heads I! and the collars 2| disposed thereabout are slightly tapered to facilitate their entry into the ends of the openings through the coils. when the coil ll has been properly engaged by the heads II, the base 2| of the saddle is lowered and the coil is then free to turn asa strip is .unwound therefrom.

motors, by suitable control mechanism, an example of which is illustrated in Figure 4. If it is desired to adjust the heads it simultaneously and precisely to the same extent, they may be tied together electrically if the machines are wound rotor induction machines suitably connected, the motor 2! servingto drive the machine 22 as a generator, the machine 22" operating as a motor and moving in synchronism with the machine 23. This system is illustrated in Figure5.

Referring now to Figure 4' wherein the machines 23 and22 are assumed to be alternating current motors, for example, induction motors, a three-phase supply circuit is shownat 4|. Current is supplied to the motors 23 and2l' through a manual switch l2 and a main line contactor 42. The circuit to the motors includes the back contacts of the reversing switches 44 and 45. The contactor 42 may be closed by a push button 40. The motors 23 thereupon turn in the same direction, for example, in such direction as to cause the shafts 2| to move the centering heads inwardly. If it is desired to move the centering heads outwardly, a push button" causes the simultaneous energization of the contactor 43 and reversing switch 44. The latter reverses the connections between two of the phases of the supply circuit and the motors 22 and 42-8.

.The latter will then rotate in the reverse direction to cause outward movement of the centering heads. If it is desired to cause both heads to move to the right,

a. push button ll permits simultaneous energizetion ofthe main contactor 4t and the reversing switch 4'. This connects the motor 23 in a direction such as to cause the left hand centering head to move to the right. The motor 28' is connected for rotation in the reverse direction through the front contacts of the reversing switch I! and the back contacts of a reversing switch 40. The motors rotate in opposite directions and both the heads move toward the right.

If it is desired to cause both the heads to'move to the left, a push button 60 makes this possible. The push button ll energizes the main contactor 43, the reversing switches 4|, '4' and It. The reversing switch 44 reverses the motor 23 usual manner to reverse the motor u' but the reversing switch ll is effective to reverse the connections again, restoring them to the normal condition for forward rotation so that the right hand head also moves to the left. a

If it should happen that the strip is not coiled accurately, because of camber therein or for the perpendicular to theooil axis as it unwinds This is objectionable because the follow a predetermi ing apparatus. We compensate for any such departure of the strip from its normal path'by means of contacts II and '2 adapted to be closed respectively, when the strip shifts to the right scribed, thiscauses the motors 2t and 22' to move thecoil ll to the left, restoring the strip gether, the system of Figure 5 is employed. In

this system, the machines 23 and fl' are wound rotor induction machines. the machine 2! operating as a generator and the machine 22' oprotate therewith. the generator 22 and by certain connections to be described later, the generator 28 causes the motor 22' to follow it in exact synchronism, just as if the two screws 2| were mechanically connected.

A main supply source is indicated at II. A main contactor 0| connects the motor 28 to the supply 60 through the back contacts of a reversing switch 82 in such direction as to cause forward rotation of the motor 20 to tin-n the left hand screw 2| and adjust the left hand head is inwardly. The stator winding of the machines 23 and 23 are connected in parallel with bed path through thetreatsimultaneous energisation 1 the same the motor 28 which is preferably ail-induction .for the motor 23.

motor. The rotor on the generator 23 is connected through slip rings and conductors 63 to the rotor of the machine 23. The connection for the stator of the machine 23' includes th back contacts of a reversing switch 64.

Closure of the contactor 6| can be efiected by operation of a push button 65. This energizes the motor 28 in a forward direction and adjusts the left hand head inwardly. The machine 23 being driven by the motor 28 operates as a generator, while the machine 23' operates as a motor and keeps in exact synchronism with the movement of the generator 23. Both screws 2| are thus adjusted inwardly simultaneously and to precisely the same extent.

If it is desired to adjust both centering heads outwardly, it is only necessary to reverse the direction of rotation of the motor 28'. This is done by the reversing switch 62. ton 66 permits the main contactor 6| and reversing switch 62 to be simultaneously energized for reverse operation of the adjusting screws.

If it is desired to move both centering heads to the right, the connections to'the stator of the machine 23 must be reversed with respect to those of the machine 23. This is accom-- plished by the reversing switch 64. A push button 61 permits simultaneous operation of the contactor 6| and the switch 64. When the push button 61 is operated, the motor 28 operates in a forward direction, while the motor 23' operates in the reverse direction. Both adjusting heads thus move to the right. If it is desired to move both heads to the left, this is accomplished by reversing the rotation of the motor 26 and also the connections of the motor 23. A push button 68 permits simultaneous energization of the contactors 6|, the reversing switch 62 for the motor 28 and the reversing switch 64 When the push button 68 is operated, the motor 28 operates in a reverse direction, while the motor 23 operates in a forward direction, causing both centering heads to move to the left.

Automatic operation of the push buttons 61 and 68 in accordance with the departure of the strip from a predetermined path is effected a in Figure 4 by contacts 5| and 52.

It will be understood that the control apparatus and the circuit diagrams shown in Figures 4 and 5 are illustrative only and are not intended to limit the invention. The particular circuits shown have been employed because they illustrate simply the theory in view, and while the systems shown will operate satisfactorily, modifications or additional refinements will suggest themselves to those skilled in the art of electrical control.

It will be apparent from the above description that the invention provides a novel and highly useful form of coil support, the chief advantages of which are that the force effective to adjust the centering heads inwardly and outwardly is applied coaxially thereof, so as to prevent misalinement of the heads and binding of the coil therebetween. In addition, theinvention lends itself readily to automatic control of the centering heads to maintain the delivered strip in a predetermined path. Any departure of the strip from this path is immediately compensated for by the contacts controlled by the strip edges. It is thus possible to feed a strip continuously along a given path regardless of camber in the A push butstrip or improper coiling thereof. The centering heads may be adjusted independently or they may be tied together electrically as described.

Although we have disclosed herein but one form of our invention, it will be recogmzed that changes therein may be made without departing from the spirit of the invention or the scopeof the appended claims.

I claim:

1. A coil support comprising a standard, a thrust member axially slidable thereon, a centering head on said member, an adjusting screw journaled on said member, and a nut on said standard cooperating with said screw, and a second centering head adapted to cooperate with the first mentioned head.

2. A coil support comprising a standard, a; thrust member axially slidable thereon, a centering head on said member, an adjusting screw journaled on said member coaxially with said head, and a nut on said standard cooperating with said screw, and a second centering head adapted to cooperate with the first mentioned head, said screw being coaxial with said second head.

3. A coil support comprising a standard, a thrust member axially slidable thereon, a centering head on said member, an adjusting screw journaled on said member, and a nut on said standard cooperating with said screw, a second centering head adapted to cooperate with the first mentioned head, and power means on said member for driving said screws 4. Coil supporting apparatus comprising a standard; a tubular thrust member slidable therethrough, a centering head on said member, a screw journaled coaxially with said head and member, a longitudinal slot in said member, a projection from said standard extending through said slot, a nut on said projection cooperating with said screw, and a second centering head cooperating with said first mentioned head.

5. The combination with a pair of spaced centering heads, means for adjusting said heads axially, a motor for driving the adjusting means of one of said heads, and an electrical tie between the adjusting means of the two heads.

6. The combination defined by claim 5 characterized by said tie comprising a generator driven by said motor, and a motor connected to the generator for driving the adjusting means of the other of said heads.

'7. A coil support including a trunnion, a centering head rotatable thereon, a thrust member to which said trunnion is secured, means whereby said member is slidably but non-rotatably mounted, a fixed nut, a screw in said member cooperating with said nut and means on said member for driving said screw. 7

8. Coil handling apparatus comprising a pair of spaced centering heads adapted to engage a coil, a motor for operating each head, and a generator driven by one motor and adapted to be connected to the other motor.

9. A coil support comprising a pair of spaced centering heads, and means for moving each head axially including a driving motor, a generator driven by the motor of one head, and means for connecting the generator to the motor of the' other head.

RAYMOND J. WEAN. DONALD A. MCARTHUR.

Images