US3021086A

US3021086A - Method and apparatus for coiling strip

Info

Publication number: US3021086A
Application number: US790886A
Authority: US
Inventors: Teplitz Alfred
Original assignee: United States Steel Corp
Current assignee: United States Steel Corp
Priority date: 1959-02-03
Filing date: 1959-02-03
Publication date: 1962-02-13
Anticipated expiration: 1979-02-13
Also published as: DE1237050B; NL247657A; GB892751A; BE587116A; FR1247197A

Description

Feb. 13, 1962 A. TEPLITZ 3,021,086

METHOD AND APPARATUS FOR COILING STRIP Filed Feb. 3, 1959 CONTROL CONTROL CONTROL CONTROL INVENTOR. Alfred Teplitz BY 910M461? W ATTORNEY CONTROL Feb. 13, 1962 I Filed Feb. 3, 1959 A. TEPLITZ METHOD AND APPARATUS FOR COILING STRIP 5 Sheets-Sheet 2 INVENTOR. Alfred Teplii'z ATTORNEY Feb. 13, 1962 A. TEPLITZ 3,021,086

METHOD AND APPARATUS FOR COILING STRIP Filed Feb. 3, 1959 5 Sheets-Sheet 3 Fig.6.

INVENTOR. Alfred Tepliiz ATTORNEY.

Feb. 13, 1962 A. TEPLITZ 3,021,086

METHOD AND APPARATUS FOR comma STRIP Filed Feb. 5. 1959 5 Sheets-Sheet 4 |66 CONTROL INVENTOR. Alfred Teplitz ATTORNEY.

Feb. 13, 1962 A. TEPLlTZ 3,021,086

METHOD AND APPARATUS FOR COILING STRIP Filed Feb. 5, 1959 5 Sheets-Sheet 5 Fig.l4.

.2 T w Ll- T 8 38 9 INVENTOR. Alfred Teplitz MW ATTORNEY.

Unite This invention relates to a method and apparatus for coiling strip and more particularly for coiling strip being processed continuously at high speeds. For example, the invention may be used at the delivery end of a continuously producing -stand tandem cold reduction mill, a continuous annealing line or a continuous electrolytic tinning line. Methods and apparatus presently used for this purpose have various disadvantages. They are expensive and so slow that the speed of a high speed processing line must be reduced to such an extent that the processing may not be carried out properly. In all cases, the slow speed reduces the output of the processing equipment.

It is therefore an object of my invention to provide a method of coiling strip traveling at high speed without greatly reducing the speed of the strip.

Another object is to provide apparatus which coils strip inexpensively at high speeds.

These and other objects will be more apparent after referring to the following specification and attached drawings, in which:

FIGURE 1 is a schematic plan view of my invention as incorporated in a tandem rolling mill;

FIGURE 2 is view taken on the line IIII of FIG- URE 1';

FIGURE 3 is a view taken on the line IIIIII of FIG- URE 1;

FIGURE 4 is a view taken on the line IV-IV of FIG- URE 1;

FIGURE 5 is an end view of FIGURE 4;

FIGURE 6 is an enlarged plan view showing the reel block equipment of my invention;

FIGURE 7 is a view taken on the line VIIVII of FIGURE 1;

FIGURE 8 is a view taken on the line VIIIVIII of FIGURE 7;

FIGURE 9 is a side elevation of the belt wrapper used in my invention;

FIGURE 10 is an end view looking toward the right end of FIGURE 9;

FIGURE 11 is a plan view of a coil brake used in my invention;

FIGURE 12 is a side elevation of the coil brake of FIGURE 11 showing its relationship with a formed coil or strip;

FIGURE 13 is a view taken on the line XIII-XIII of FIGURE 12;

FIGURE 14 is a view of coil discharge apparatus used in my invention showing its relationship with the reel blocks; and

FIGURE 15 is a transverse sectional view of the equipment of FIGURE 14.

Referring more particularly to the drawings, reference numeral 2 indicates the penultimate roll stand of a continuous tandem rolling mill. The rolls are driven from motor 4 in the usual manner with a control 6 being provided for the motor 4. A strip S passes from the rolls 2 to the last stand 8 which is driven from a motor 10 provided with controls 12. From the roll stand 8 the strip S passes over a deflector roll 14 through a thickness gage 16 to a pair of pinch rolls 18. Except for the pinch rolls 18, the parts so far described are conventional. From the pinch rolls 18 the strip S passes to a single cut drum-type flying shear 20 which may be of the type shown in my copending application, Serial No. 735,222, filed May 14, 1958. Guides 22 are provided between the rolls 18 and shear 20. From the shear 20 the strip passes between a top deflector roll 24 and a bottom guide 26 and is guided into a coiler 28 with the aid of a bottom deflector roll 30. The pinch rolls 18 are solid bodied cylindrical rolls mounted in bearing chocks 32 which in turn are mounted in housing 34. Hydraulic cylinders 36, mounted in the housing 34, raise and lower the top roll 18 in the conventional manner. The rolls 18 are driven from a motor 38through gear box 40 and shafting 42. A control 44 is provided for motor 38. The flying shear 20 includes a drive motor 46 and control 48. A preferred construction for the mounting of roll 24 is shown in FIG- URES 4 and 5. As there shown, roll 24 consists of a cylinder 50 mounted for rotation on anti-friction bearings 52 which are mounted on a shaft 54. The shaft 54 is mounted in chocks 56 which are slidably mounted in grooves 58 provided in brackets 60. A spring 62 is mounted in the bottom of each groove 58 and bears against the bottom of the associated chock 56. Screws 64 bearing against the top of chocks 56 are used to adjust the roll for pass line requirements. The bottom deflector roll 30 is preferably mounted in a manner similar to deflector roll 24 but with upward acting pass line adjustment. The coiler 28, as best shown in FIGURES 6 to 8, includes a pair of conventional

collapsible reel blocks

66a and 66b which are mounted for rotation in anti-friction bearings 68a and 68b. The bearings 68a and 68b are supported in a yoke 70 which in turn is mounted for rotation in anti-friction bearings 72. The bearings 72 are supported in a housing 74. The yoke 70 is rotated by means of a gear motor 76 through gearing 78. A control 80 is provided for the motor 76. The yoke 70 includes a hollow cylindrical portion 82 through which passes a sleeve 84. The sleeve 84 is rotatably mounted in bearings 86 and is driven by a motor 88 through shaft 90 and gears 91. A dynamic brake 92 and control 93 are provided for the motor 88. The sleeve 84 rotates block 66b through gearing 94. A shaft 96 passes through sleeve 84 and is rotatably mounted therein. Shaft 96 is driven by means of a motor 98 having a dynamic brake 100 and control 102. The shaft 96 drives block 66a through gearing 104.

Blocks

66a and 66b are expanded and collapsed by horizontal movement of the

usual push rods

106a and 106b. Motion is imparted to the push rods 106a and 1116b by means of actuators 188a and 10812 which are mounted on the yoke 70. The actuators 108a and 1198b are of any conventional type similar to the electro hydraulic mechanisms sold by General Electric Company under the trade name Thrustor. The horizontal motion of actuators 108a and 1418b is imparted to push rods and associated reel block by means of linkages 110a and 11012. The actuators 108a and 1118b are provided with

collector shoes

112a and 112b, respectively. Power is provided to the

actuator

108a or 108b when in the lower position through the associated shoe 112:: or 11217 from electrical conductor rails 114. The coiler also includes the belt wrapper 116. The belt wrapper 116 includes a frame 118 mounted for movement toward and away from the

block

66a or 66b, whichever is in the upper position, by means of hydraulic motor 120 having a control 121. A generally horizontal arm 122 is mounted on the forward end of frame 118 by means of hinge 124. A pulley 126 is mounted on the end of arm 122. A second arm 128 is pivotally mounted on the frame 118 and has a roll 130 on its outer end. A third arm 132 is mounted on the frame 118 and has a pulley 134 mounted on its outer end. A roll 136 is also mounted on the frame 118. A belt 138 passes around rolls or

pulleys

126, 130, 134 and 136. A spring 140 has one end attached to the frame 118 and the other end attached to the arm 128 so that the arm 128 is biased to the left, as shown in FIGURE 9,

thus providing belt tension. A magnet 142 is suspended from the frame 118 and arm 122 in such a way that the belt 138 slides over its bottom surface during the time the belt wrapper isin operative position. The magnet 142 may be permanent or an electro-magnet. When the hydraulic motor 120 moves the belt to the right, as shown in FIGURES 1, 2 and 9, toward the reel block 66a the belt 138 is forced into the configuration shown in full lines and almost completely cnvelops the block 66a. Ex

.cept for the magnet 142 and the arm 122 being hinged,

this mechanism is conventional. The purpose of having the arm 122 hinged is to insure contact of the belt 138 with the deflector roll 30 and to permit a small upward movement of pulley 126 during retraction of the wrapper so as to allow clearance of the coil wraps placed on the block 66a duringthe wrapping operation.

Two

retractable coil brakes

144 and 146 are provided adjacent the reel block in the lower position, one on each side of the coil C being formed. Since the coil brakes are identical, except for length of stroke, only one will be described. A pair of channels or

rails

148 and 158 are arranged parallel to each other, their flanges facing each other, and are mounted on

structural supports

152 and 154. Two wheels 156 are mounted on the inner sides of each of the

rails

148 and 150, as shown. A carriage 158 is mounted between

rails

148 and 150 and includes two spaced apart rails or channels 160 arranged parallel to the

rails

148 and 150 and with their flanges facing the

rails

148 and 150. Plates 162 connect the channels 160. An air cylinder 164 provided with a control 166 has one end pivoted to the support 152 and its piston rod 167 connected to the carriage 158. A wheel 168 is mounted on the rear end of each channel 160 and rides in

rails

148 and 150. A rod 170 extends between the channels 160 at the forward end thereof and pivotally supports arms 172 and 172a. Arm 172 consists of two side bars 174 connected by means of a bearing plate 176 and tube 178. Arm 172 also consists of two side bars 174a connected by plate 176a and tube 178a. The ends of a flexible brake belt 180 are fastened to

tubes

178 and 178a. The carriage 158 is moved toward and away from the reel block by means of the air cylinder 164. The wheels 156 are provided in order to support the long stroke or movement of the carriage without interference with the coil C being formed.

In order to remove the coil C to a discharge ramp 182 a carriage 184 is provided beneath the

reel block

66a or 66b. Carriage 184 is provided with wheels 186 which may be driven in any suitable manner so as to move the carriage along rails 188 from a position on the pass line of the mill to a position to one side thereof. A coil hoist 190 is mounted on the carriage 184 for vertical slidable movement. Power for raising and lowering the coil hoist 190 is provided by a conventional hydraulic motor 192 mounted on carriage 184. An auxiliary hydraulic cylinder 194 is mounted on the upper part of hoist 190 and is used to tip platform 196 at the top of the hoisting stroke to discharge the coil C on the ramp 182. A foot bridge 198 is provided to permit access to the reel blocks for removal of cobbles, for inspection, and the like.

The operation of my device is as follows:

Assume the situation wherein a coil C being wound on the block 6611 is almost complete, the rolling mill is running at normal delivery speed, the pinch rolls 18 are running at a speed equal to the mill speed with the upper roll out of contact with the strip, the shear is running at a peripheral speed equal to the mill speed with its knives retracted, the yoke 70 is stationary, reel blocks 66a and 66b are in the positions shown with their mandrels expanded,

brakes

144 and 146 are fully retracted, belt Wrapper 116 is in working position with the belt stationary and the magnet 142 magnetized, and the carriage 184 is on the center line of the mill with the hoist 190 in its lowest position. The rolling mill and all rotating parts are then decelerated to terminating speed, for example,

1200 feet per minute. At the same time, or immediately thereafter, the top roll 18 is lowered to place pressure on the strip S and the speeds are adjusted so that the strip tension between the mill stand 8 and rolls 18 is slightly greater than the tension between rolls 18 and reel block 66b; reel block 66:: is accelerated so that its peripheral speed is substantially equal to terminating speed with the belt 138 coming up to speed with it; and

brakes

144 and 146 are moved close to, but not in contact with, the coil C. These steps may be carried out manually or automatically as desired. The

brakes

144 and 146 are then moved into contact with coil C, shear 20 is operated to sever strip S, and reel block 6612 is decelerated to a stop by dynamic braking of motor 88 combined with the effect of magnetic brake 92. Immediately following the severing of the strip the end of the strip is drawn against belt 138 by the flux of magnet 142 and enters the gap between belt 138 and reel block 66a upon which it is wound. After ten to fifteen wraps have been made to insure a tight grip on the block the belt wrapper 116 is retracted and the mill is accelerated to normal speed. The top roll 18 is then raised to clear the strip and the motor voltages adjusted so that the lower roll 18 will not slip on the strip. As soon as the formed coil C on reel block 66b is brought to a stop, coil hoist 190 is raised until platform 196 comes into contact with the coil C, the reel block 66b is collapsed by actuator 108b and the carriage 184 is moved outwardly through its full travel, carrying with it the coil C resting on the platform 196. The reel block 66b is expanded, the hoist 190 is raised to its upper limit and the cylinder 194 tips the platform 196 as shown in broken lines in FIGURE 15 so that coil C will roll by gravity onto discharge ramp 182. The platform 196 is then lowered by cylinder 194, coil hoist 190 is dropped to its lowest position and carriage 184 returned to its original position shown in full lines in FIGURE 14. In the meantime, when carriage 184 has reached the limit of its travel away from the mill, yoke 70 is slowly rotated in a clockwise direction, as shown in FIGURE 8, to reverse the positions of reel blocks 66 and 66b. The speed of rotation of yoke 70 is sufiiciently low that the reel drive motor control has no difliculty in maintaining correct strip tension during the position change. This completes an operating cycle which is repeated when the new coil on block 66a is of sufficient size. The purpose of the pinch rolls 18 is to prevent snap-back of the strip S toward the mill when the strip issevered under tension. The pinch rolls also prevent sudden strip contraction and provide a slight excess tension in the strip to minimize the effect on strip gage of change in tension between the time the strip is severed and full reel tension is reestablished. It should be noted that the

brakes

144 and 146 are not provided to stop rotation of the reel blocks 66a and 66b but to prevent centrifugal force from loosening the outer Wraps of the coil and the free end of the strip from flying outwardly when the strip is severed.

While one embodiment of my invention has been shown and described it will be apparent that other adaptations and modifications may be made without departing from the scope of the following claims.

I claim:

1. Apparatus for coiling strip comprising a shear in the path of travel of said strip,- a belt wrapper aligned with the path of travel of said strip, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable reel blocks, a rotatable yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been wrapped therearound, and means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block.

2. Apparatus for coiling strip comprising a belt wrapper aligned with the path of travel of said strip, a pair of rotatable reel blocks, a rotatable yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been Wrapped therearound, a pair of coil brakes one on each side of the reel block in said remote position, and means for moving said coil brakes into position to engage the outer convolution of a completed coil of strip.

3. Apparatus for coiling strip comprising a shear in the path of travel of said strip, a belt wrapper aligned with the path of travel of said strip, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable reel blocks, a rotatable yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt Wrapper after several convolutions of strip have been wrapped therearound, means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block, a carriage beneath the reel block in said remote position, means for moving said carriage from a position beneath the strip pass line to a position to one side thereof, a hoist mounted on said carriage, a coil receiving platform on said hoist, and means for tilting said platform to remove a coil therefrom.

4. Apparatus for coiling strip comprising a shear aligned with the path of travel of said strip, a belt wrapper aligned with said shear on the exit side thereof, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable collapsible reel blocks, a yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block and means for expanding and collapsing said reel blocks, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been wrapped therearound.

5. Apparatus for coiling strip comprising a shear aligned with the path of travel of said strip, a belt wrapper aligned with said shear on the exit side thereof, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable collapsible reel blocks, means for rotating said reel blocks, a yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, means for expanding and collapsing said reel blocks, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been wrapped therearound, a pair of coil brakes one on each side of the reel block in said remote position, and means for moving said coil brakes into position to engage the outer convolution of a completed coil of strip.

6. Apparatus for coiling strip comprising a shear aligned with the path of travel of said strip, a belt Wrapper aligned with said shear on the exit side thereof, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable collapsible reel blocks, a yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block, means for expanding and collapsing said reel blocks, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt Wrapper after several convolutions of strip have been Wrapped therearound, a carriage beneath the reel block in said remote position, means for moving said carriage from a position beneath the strip pass line to a position to one side thereof, a hoist mounted on said carriage, a coil receiving platform on said hoist, and means for tilting said platform to remove a coil therefrom.

7. Apparatus for coiling strip comprising a pair of pinch rolls, means for feeding the strip to said pinch rolls, a shear on the exit side of said pinch rolls, a belt wrapper aligned with said shear on the exit side thereof, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable collapsible reel blocks, a rotatable yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block and means for expanding and collapsing said reel blocks, the reel block in cooperative relationship with said belt wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been Wrapped therearound.

8. Apparatus for coiling strip comprising a pair of pinch rolls, means for feeding the strip to said pinch rolls, a shear on the exit side of said pinch rolls, a belt wrapper aligned With said shear on the exit side thereof, means for directing the leading end of said strip in substantially a straight line from said shear to said belt wrapper, a pair of rotatable collapsible reel blocks, a rotatable yoke for supporting said reel blocks in spaced apart relationship, means for rotating said yoke to selectively position said reel blocks in cooperative relationship with said belt wrapper to receive an end of said strip, means for rotating each of said reel blocks independently of the rotation of the other reel block, said last named means being operative regardless of the position of its associated reel block, means for expanding and collapsing said reel blocks, the reel block in cooperative relationship with said belt Wrapper being movable to a position remote from said belt wrapper after several convolutions of strip have been Wrapped therearound, a carriage beneath the reel block in said remote position, means for moving said carriage from a position beneath the strip pass line to a position to one side thereof, a hoist mounted on said carriage, a coil receiving platform on said hoist, and means for tilting said platform to remove a coil therefrom.

9. The method of coiling strip traveling at high speed comprising shearing the strip, feeding the leading end of the sheared strip in substantially a straight line from the shear to a belt Wrapper around a reel block, removing the reel block to a position remote from the belt wrapper after several convolutions of strip have been wrapped therearound, positioning a second reel block in cooperative relationship with the belt wrapper while continuing winding of the strip on the first reel block, again shearing the strip and feeding the leading end of the sheared strip in substantially a straight line from the shear to the belt wrapper around the second reel block, stopping rotation of and removing the coiled strip from the first reel block while continuing winding of the strip on the second reel block, then removing the second reel block to a position remote from the belt Wrapper While continuing winding of the strip thereon, and then returning the first reel block to a position in cooperative relationship with the belt wrapper.

10. The method of handling strip traveling at high speed comprising decreasing the speed of the strip, shearing the strip, feeding the leading end of the sheared strip in substantially a straight line from the shear to a belt Wrapper around a reel block, removing the reel block to a position remote from the belt Wrapper after several convolutions of strip have been wrapped therearound, positioning a second reel block in cooperative relationship with the belt wrapper while continuing winding of the strip on the first reel block, bringing the speed of the strip back to its original high speed, slowing down the speed of the strip when the coil on the first reel block approaches finished size, then shearing the strip and feeding the leading end of the sheared strip in substantially a straight line from the shear to the belt wrapper around the second reel block, stopping rotation of and removing the coiled strip from the first reel block while continuing winding of the strip on the second reel block, then removing the seeond reel block to a position remote from the belt Wrapper while continuing winding of the strip thereon, then returning the first reel block to a position in cooperative relationship with the belt Wrapper, and bringing the speed of the strip back to its original high speed.

References Cited in the file of this patent UNITED STATES PATENTS 887,418 Morse May. 12, .1908 1,139,077 Safford May 11, 1915 2,258,348 Biggert Oct. 7, 1941 2,281,423 Egge Apr. 28, 1942 2,325,504 Goins July 27, 1943