DE1452104A1 - Method and device for the continuous cold rolling of strip - Google Patents

Description

UNITED STATES STEEL CORPORATION PITTSBURGH 30, PENNSYLVANIA WILLIAM PEN PLACE 525
V. St. A.

Method and apparatus for continuous cold rolling

from tape.

The invention "relates to a reducing roller mill and in particular on a rolling mill for continuous cold reduction, successive steel reels. Reduction cold rolling mills are essentially operated at present in batches, as each coil has to be threaded individually into the rolling mill. This has several disadvantages. Among other things, the . Threading the strip into the rolling mill "consumes considerable time and the roll outfeed is therefore relatively small. During the threading process and the acceleration and

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Patent attorneys Dipl.-Ing. Martin Licht, Dipl.-Wirtfch.-lng. Axel Hanimann, Dipl.-Phys. Sebastian Herrmann I MÖNCHEN 2, THERESIENSTRASSE 33 · Telephone! 292102 Telegram Adrett t Lipatli / Munich

Bank connections Deutsche Bank AG, RIIoIe Munich, Dep.-Katte Vikhnllenmarkt, account no. 716728 Bayer. Compatible * media, branch Otkar-von-Miller-Rina, account no. M249S Potitchedc-Kantoi Munich No. 163397

OppwMuerMrc »PATENT ADVOCATE DR. REINHOLD SCHMIDT

ORiGiNAL INSPECTED

In addition, it is not possible to slow down the normal strip tension between the various roll stands maintain. This means that at the beginning and end of each reel there is a piece of tape that is not the right size. Also, because it is difficult to maintain normal belt tension during the threading process, the belt often breaks. This leads to a loss of material and often leaves marks back on the reels. The rollers must therefore be changed and reworked more often than is otherwise necessary were.

The invention is accordingly based on the object of a To create an apparatus for the continuous cold rolling of a plurality of individual reels of tape.

This device is intended to provide a device for quickly joining different tape reels to form a continuous tape to have.

These and other features of the invention emerge from the following description and drawings illustrating the invention illustrate in an exemplary manner.

Pig. 1 is a schematic plan view of the continuously, working cold reducing system according to the invention with control devices;

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Pig. Figure 2 is a view taken generally along line II-II of Figure 1;

Fig. 3 is a view taken generally along line IH-III of Pig. 1;

Pig. 4 is a front elevational view of FIG

Device for coil centering on an enlarged scale;

Fig. 5 is a taken along line V-V of Pig.4 Cut;

Pig. Fig. 6 is a side view, partly in section, of the bobbin transferring plate of the rolling mill ;

Pig. Figure 7 is a top plan view of the Pig spool saddle. 6th

Pig. Fig. 8 is a plan view, partly in section, of the roll straightener of the rolling mill partly gone;

Pig. Figure 9 is a view taken generally along line IX-IX of Figure 8;

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Pig. Figure 10 is a top plan view of the alignment guides of the rolling mill;

Figure 11 is taken substantially along the line

XI-XI deyfrig. 10 laid representation;

Figure 12 is a top plan view of a portion of Figure 12

Rolling mill showing details of a jib crane;

Figure 13 is a partial side elevation of a portion

of the rolling mill, from the details of the unwinding device and the boom. cranes can be seen; and

Fig. 14 is an individual representation of the boom - * -

crane.

Reference is now made in particular to Figures 1 through 3 of the drawings. The reference numeral 2 ″ denotes a conventional, motor-driven conveyor for receiving tape reels C that are to be cold-rolled. The openings the coils run horizontally and a centering device 4 is provided at the discharge end of the conveyor. As can best be seen in FIGS. 4 and 5, the centering device 4 has two side plates 6 which and can be moved away from each other. Each side plate

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is supported by a right-angled link 8, which by means of a bearing 12 is supported by a vertical column 10. The upper ends of the side pillars 10 are through a horizontal support 14 connected to each other. The beam and pillars form a support frame for the links 8. Each of the links 8 carries a rack 18. Each of these racks 18 in turn meshes with one on a vertical Gear 20 arranged on shaft 22. At the top of each shaft 22 there is a sprocket 24. The sprockets 24 on both Shafts 22 are connected by means of a roller chain 26. The racks 18, the gears 20, the sprockets 24 and the chain 26 form a compensation device which ensures that each of the side plates 6 when the Air cylinder 16 moved the same distance. The plates 6 therefore each have the same distance from the center line of the conveyor 2. When a spool C moves to the discharge end of the Conveyor 2 is moved, then the cylinders 16 are operated to move the side plates 6 inwardly to close the spool center. The cylinders 16 are then actuated to retract the side plates 6.

At the exit end of the conveyor 2 there is a ramp 28, which leads to a coil saddle 30. How best to As seen in FIGS. 6 and 7, the coil saddle 30 has a base plate 32 which rotates with a rotatable shaft 33.

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To drive the rotatable shaft 33 by means of a motor not shown, a gear 34 is provided. On the Base plate 32 sits a stand 38 'at one end a coil support plate 36 is articulated. The other end the bobbin support plate 36 is one with a piston rod 39 Iiuftzylinders 40 connected, which is arranged so that he move the coil support plate 36 vertically around its pivot bearing can. The spool support plate 36 has two openings 44 for receiving two rotatable rollers 42. These carry the rollers to be unwound Bobbin when the bobbin support plate is in its lower position, which is fully marked in Pig. 6. the Rollers 42 are driven by a reversible motor 45 by means of chains 46.

Beyond the saddle 30, in alignment with the conveyor 2, there is an X ^r or direction for preparing the bobbins. This device 48 contains a roll straightening machine 49, alignment guides 50 and conventional end trimming scissors 52. The end trimming scissors 52 are set at a small angle so that they perform an oblique cut for a reason to be described in more detail.

As best shown in FIGS. 8 and 9, the roller straightening machine has 49 Bottom rollers 53 and top rollers 54 · The top rollers 54 sit on a movable carrier 55 and can be adjusted to and fro with respect to the lower rollers by means of spindles 56 will. On the input side of rollers 53 and 54

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let a pair of pinch rollers 57 »58 be arranged. The sub-role The pair of pinch rollers has a fixed axis, and the Upper roller 58 aitzt on a displaceable carrier 59, the by means of spindles 60 relative to the ohter roller 57 back and forth displaceable is. The supports 55 and 59 are supported by an upper frame 61 which is attached to the piston rods 62P of four air cylinders 62 is seated and can be displaced back and forth relative to the lower rollers 53 and 57 by the air cylinder 62. At An adjustable stop 62S is attached to each of the piston rods 62P to limit movement.

As shown in Figures 10 and 11, the alignment guide includes 50 two shafts 63 with right-hand and left-hand threads 63R and 63L. The shafts 63 are rotatably seated in a support frame 64. On the threaded sections 63R * md 63L sit two side guides 65, which duich rotation of the shafts 63 are mutually adjustable back and forth. Between the side guides 65, the shafts 63 carry a central belt carrier 66. The shafts 63 are rotated by means of a motor 67, namely via a chain 68, sprockets 69 and 70 and a chain 71.

The main part of the rolling mill runs at right angles to the longitudinal center line of the conveyor 2 and the roller straightener 49 in alignment with the bobbin saddle 30. A conventional unwinding device 72 belongs to the main part of the rolling plant

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the conical design. This jig 72 has side plates 72S, a hinged platform 72P, spool idlers 72R, a hydraulic hoist 72H for the spool idlers 72R and an air cylinder 72C for displacing the platform 72P about its pivot point. Next up is in line a conventional bobbin case 73 for rotatably receiving a bobbin C, This winding box is followed by a roll straightening machine 74, which is constructed in the same way as the roll straightening machine 49 · at the exit end of the roller straightening machine 74 is a butt welding system 75 provided with a punch 75P. At the exit end of the butt welding system 75 are end trimming scissors 76, which cuts the tape just as diagonally as the scissors. The scissors 76 are followed by an alignment guide 77, the preferred ' wise has the same construction as the alignment guide 50. This in turn is followed by a device 78 for plastering the Weld. At the output end of the cleaning device 78 there are guide rollers 79 and input rollers 80 for an accumulator intended. These lead the tape into an accumulator 81. This is preferably one of those accumulators Type described in U.S. Patent ITr. 2,996,230 of August 15, 1961. The accumulator has arms 8IA for taking up loops of the tape S. From the accumulator 81 guide rollers 82 lead to a welding tester 83. Am There are adjustable side guides 84 at the output end of the welding tester 83. These are preferably ' String guides of the type described in U.S. Patent

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■ 3 071 032 of January 1, 1963 ". These side guides lead the strip to a five-stand "cold rolling mill 85, 86, 87» 88 and 89. Preferably guides similar to guides 84 are provided at the entrance end of each roll stand. But these are not shown. A thickness meter 90 is located between the roll stands 85 and 86. This thickness meter can be a conventional X-ray thickness gauges such as those supplied by the General Electric Company. A similar one Thickness meter 91 is located on the output side of the frame 89. On the output side of the thickness meter 91 there is a welding tester 92. The vision welding testers 83 and 92 can be conventional hole testing devices. The welding tester 92 is followed by pinch rollers 93> a flying scissors 94 and a winder 95. These are preferably a winder of the type described in U.S. Patent No. 3,021,086 issued February 13, 1962 is. The scissors 94 are preferably of the type described in U.S. Patent No. 3,057,239 dated October 9, 1962.

A jib crane 96 is arranged between the roller straightening machines 49 and 74. How best to be in the characters 12, 13 and 14, the jib crane 96 has a frame 97, to which one end of an I-beam is hinged. A vertical pivot pin 99 is used for this purpose The axis of the pivot pin 99 is aligned with the axis of the shaft 33.

directed. The other sin of the carrier 98 is through a

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ORIGINAL! MCPECTED

guideway 100, supported in the form of a curved I-beam, The other end of the carrier 98 runs on a motor powered monorail trolley .101. A second monorail cat 102 runs on the carrier 98, the cat 102 carries one motorized elevator 103 having one hanging therefrom Magnet 104 raises and lowers.

To control the speeds of the roll stands 85, 86, 87, 88 and 89 are each provided Schwindle its controls 85s, 86S, 87s, 88S and 89S. A main control 106 is connected to the controls ^ 85s, 86S ₉ 87S "68S and 89S. The welding test devices 83 and 92 are connected to this main control 106. Each of the roll stands 85 to 99 is a control spindle 85D, 86D, 87D, 88B The control spindle 85D can be operated manually or by means of a thickness measurement controller 108 /. The control spindles 86D, 8? D "The voltage limiting control · 110 is dependent on the voltage between the roll stands 88 and 89 ο The thickness measurement control can be set to various dimensions and receives signals from the welding tester 83 and the Diekenaiesser 9O ₉ The voltage limiting control 11.0 is connected to the speed control 89S» A second thickness measurement controller 112 is like this.

connected that they the speed of the roll stand

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89 can change. The thickness measurement controller 112 receives Signals from the thickness gauge 91 and the eye whitening tester 92. The devices described above are conventional. Kind, with the direction of the various impulses in Pig.1 is indicated by arrows.

The incoming strip reels are in operation of the rolling mill by a pusher, a truck or an overhead crane placed on the conveyor 2. The coils are hot-rolled, pickled strip with a thickness of 1.9 mm up to 2.8 mm and a width of 457 mm to 965 mm. The average weight a single hot rolled coil is 5440 kg (12,000 lbs.) and the coils being rolled can be around individual hot-rolled coils or around two or three welded together Trade coils. The conveyor 2 is operated until the first reel is transferred onto the ramp 28 and on the saddle castors. 42 of the saddle 30 comes to rest. Needless to say, the coil C is through the alignment beforehand Device 4 has been aligned before it is delivered to the saddle rollers 42 -öie saddle rollers 42 are then rotated so that that they bring the beginning end of the tape into a position where it can be gripped by magnet 104 and inserted between pinch rollers 57 and 58. The tape gets that far passed through the straightening rollers 53 and 54 until the head end reaches the scissors 52. There will be damaged material cut off. The operator then lifts the rollers 54

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and 58 to release the tape, and then the Alignment guides 50 moved against the tape to align it for the final .angle cut. Then the Saddle rollers 42 rotated to withdraw the tape end from rollers 53, 54 * 57 and 58. The turntable 32 and the carrier 98 are then rotated 90 ° at the same time, with the magnet 104 holding the front end of the tape. Following this will the bobbin is aligned and centered in the unwinding device 72 and can then be fed into the rolling mill. The gap between the rolls of the stands 85 to 89 are set by means of the control spindles 85D to 89D so that the desired band strength. The roller speed is set by means of the main controller 106. This happens in the usual way. The guides 84 are also on the desired bandwidth set. When the strip has been conveyed through the rolling mill, and the rolling mill in the usual way Is set, the rolling of the first product is started. The tape is from the spooling device 72 with a at a speed greater than the rolling speed, so that the accumulator 81 gradually fills up. While the first bobbin is rolled and rewound at the winder, a second bobbin is rolled in the same way prepared like the first bobbin. When the first bobbin becomes small, the unwinding device 72 moves it into the bobbin case 73 transferred. This is done by using the saddle castors 72R raises so that they carry the coil, then the cones and the

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Retracts side plates 72S, and then the saddle rollers 72R lowers and the platform 72P tilts so that the bobbin falls under its gravity into the bobbin case 73, where it continues to be unwound. The new bobbin is then transferred from the saddle 30 to the unwinding device 72. This is what the platform 36 tilted so that the coil is under its gravity rolls onto platform 72P. The saddle rollers 72R are raised, bringing the new spool into the correct one Location where the cones can enter the bobbin opening. Then the saddle rollers 72R are lowered, and the new one The bobbin is in the position where it is threaded into the rolling mill can be. When the first bobbin is almost unwound, the top rollers of the roller straightener 74 are lowered, so that the last three to 4> 5 m of the coil are brought into a flat shape. When the tail end of the tape When it reaches the scissors 76, the pinch rollers 80 are stopped and the alignment guide 77 is actuated to align the tape. The end of the tape is then cut off at the correct angle and the pinch rollers 80 are driven in reverse, so that they bring the tail end of the tape into welder 75. The head end of the in the unwinding device 72 is inserted into the welder by the roller straightener 74, and then the butt welder 75 actuated to connect the two ends. The punch 75P makes a hole at the weld in the tape? this hole can then later be used by the welding test equipment Press 83 and 92. After welding, the clamping

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ORIGINAL INSPECTED

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Rollers 80 driven to weld the seam into the cleaning fixture 78 bring for the weld. 17enn the rolling mill like it happens very often, has slowed down, it will be brought back to normal speed. The pinch rollers 80 are operated at a speed greater than the speed of the system until the accumulator is filled is, and then the speed of the pinch rollers is reduced to the speed of the system. In the In the meantime, another coil G is already being prepared, so that the process described above is repeated can. ■,.

The tape is first wound onto the upper winding mandrel 95U then the winding device 95 is rotated so that the upper winding arbor 95 ü comes down and the lower, empty winding arbor 95L comes up The rolling mill is slowed down somewhat and the flying cutting shears 94 are actuated so that they cut through the strip, the free end of the strip immediately entering the strip winder of the winding device 95, so that a new bobbin can start running on the winding mandrel 95D brought normal working speed and the finished bobbin is removed from the winding mandrel 95ΪΓ. Then the work sequence is repeated «

When the welding tester in the tape a weld detects, it sends a signal to the main controller 106 to slow the speed of the line, so that damage the belt and / or the rollers can be avoided. This is possible because the coils are welded together diagonally Tape "progressively through the rollers, reducing the maximum impact on the rollers. Therefore, the minimum speed must be greater than when the coils are welded to one another at a directly transverse seam would be. When the welding point by the welding tester 92 passes, it sends a signal to the main controller 106 to bring the line to its normal operating speed postpone.

If a strip of a different width is to be rolled *, then the entry guides and the hold-down 84 are readjusted. If the band has a lower thickness, the Guided tour readjusted after going through the narrower bandwidth. If the new band is wider, then the guide is readjusted before the belt reaches the guide. That can happen automatically by the fact that one a width measuring device 120 is provided, the output signal of which is fed to a controller 122 which controls the side guides 84 to the desired width.

Before changing the tape thickness, the reference points of the thickness measurement controls 108 and 112 are manually set to the new strength set. This change takes place at the beginning

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end of a new bobbin, and when this bobbin with the
If the welding point connecting the preceding coil reaches the welding tester 83, a signal is fed to the thickness measuring fault 108 so that it is automatically brought to the new preset value. The first roll stand is
then automatically adjusted to the correct position by the control spindle. When the weld excites the second welding tester 92, the reference point of the thickness measurement controller 112 automatically changes to the newly preset one
Changed value; that leads to the fact that the strip of the rolling mill
leaves with the correct thickness.

During the operation of the line, the voltage limit control provides 110 the position of the spindles on the roll stand 89 automatically in the correct direction to keep the tension in the correct range.

Of course, automatic controls can and are preferably provided so that all operations are carried out
the line run automatically and do not need to be done by hand.

While an embodiment of the invention has been illustrated and described, changes and modifications can of course be made without the
To leave the scope of protection of the following claims.

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Claims (15)

8MONCHENi-THERESiEN8TRASSE33 TD ^ vWfaMhoAXE L H-AN SM AN N -AN S HERRMANN UHITED STATES STEEL CORPORATION Mönchen, January 5th, 1965 PITTSBURGH 30, PENNSYLVANIEN ", - .. ■ ... Your reference Our reference. WILLIAM PENN PLACE 525 Ha / HM V. St. A. Patent application: "Method and device for the continuous cold rolling of strip" PAT E NTANoPR ti CHE 1. Continuously working reducing roller mill, characterized by the following component A facility (2, 6, 30, 48, 50) for receiving incoming tape reels (C) to be reduced; one of the aforementioned institutions associated first scissors (52) for cutting off the head end of the received tape reel for preparation for processing; one device (72, 73) »the one carries prepared tape reel rotatably so that tape can be unwound therefrom; a device (96r-1O4) for transfer a prepared spool © to the aforementioned device (72, 73); a belt accumulator (81) on the output side the spool supporting means (72, 73) is disposed; one between the means supporting the bobbin (72, 73) and the accumulator (81) arranged second scissors (76) 809825/0025 Patent attorneys Dipl.-Ing. Martin Licht, Dipk-Wirtsch.-Ing. Axel Hansmann, Dipl.-Phys. Sebastian Herrmann * B MÖNCHEN 2, THERESIENSTRASSE 33 > Telephone. 292102 Teleeromm-Adreuei Llpalli / Munich Bank details! German «Bank AO, Munich branch, Dep.-Kaiw Viktualltnmarkt, account no. 716728 '* ■ Bayer, United bank Manchen, Zweigtf. Oshar-von-Müler-RIng, account no. 882495 Poihcheck accounts Manchen No. 1633 VJ ORlGIMAL! •.; ■■■■ - .., 14S1104 -Λ-; ■ - ■■■■■■■ for cutting off the tail end of an "under treatment" Kitchen sink; a welding device (75) for welding together of the cut head end of a prepared reel of tape and the tail end of the tape of a reel that from the device (72, 73) carrying them, several reducing roller stands arranged in a line have been completely unwound (85, '86, 8? »88, 89) the tape from the accumulator (81) take over and reduce cold; and means (95) for winding the cold reduced tape. 2. Plant according to claim 1, characterized by a first straightening machine (48) arranged to level the head end of a received reel; and a second straightening machine (74) j which is arranged so that she-das Schwanzen.de leveling a coil under treatment. · 3 · Plant according to claim 1 ,. characterized in that the device rotatably supporting a prepared reel consists of an unwinding device (72) of conical construction and a cistern (73), that means (720, 72H _1, 72P, 72R) are provided around a reel from the unwinding device (72) in the cistern · (73), and that a further device (30) is arranged9 which transfers the received bobbin to the cone unwinding device after the head end has been cut off. IKi ₄ L INSPECTE ■ ■ Λ 4 * system according to claim 1, characterized in that "both scissors (52, 76) cut the tape at an angle, and in that the welding device (75) comprises the sequential coils weld together at the inclined cutting lines. 5. Installation according to claim T, characterized by one between your accumulator (8i) and the first of the reducers roll stands (89 arranged welding tester (83)> and control means (106, 85S, 86S, 87S, 88S, 89S) which reduce the rolling speed of the G-stands when the eye welding tester (83) detects a weld. 6. Plant according to claim 5> characterized by a second welding tester (92), which between the winding device (95) and the last of the Redazierkältwälzgerüst (89) is arranged, and the speed of the Roll stands increases when it detects a weld. 7 · Plant according to claim 1, characterized by adjustable Lateral guides (84) between the accumulator (81) and the first of the reducing mill stands (85). 8. Plant according to claim 7 »characterized by a between the accumulator (81) and the side guides (84) arranged width measuring device (12O) and through to the width measuring device (120) responsive control means for setting of the side guides according to the measured width. 909825/0025 ORlQiHAL I, N £ KI U52104 -V- SLO 9. Plant according to spoke 1, characterized by a Alignment guides assigned to each pair of scissors (50, 77) 10. Plant according to claim 1, characterized in that the welding device (75) is a butt welding machine is, and that between the welding device and the accumulator (81) a cleaning device (78) for the weld is arranged. 11. Plant according to claim 1, characterized in that the first scissors (52) cooperate with a conveyor (2), the conveying direction of which runs transversely to the line of passage of the rollers, and characterized by a device (30) which the received bobbin after trimming rotates its head end so that it is unwound in the direction of the passage line of the rollers " 12. Plant according to claim 11, characterized by a assigned to the conveyor (2). Spool centering device (4) j a saddle (42), each of which takes over a spool from the conveyor (2) and has a flushing device and a Rotary device (33> 34) is equipped, which rotates the saddle around a vertical axis by 90 °, so that the prepared Reel is aligned with the means (72, 73) which rotatably supports the prepared reel, and characterized by Means (36 ~ 4Öj96-iö4) to transfer the prepared coil to the institution responsible for it (72) * ÖOöiäS / Ol 13. "Plant according to claims 2 and 12, characterized by a jib crane (96-104) »which the head end of a reel in time coordination with the one rotating the crane Setup from the first leveler (48) to the second Straightening machine (74) transferred. 14. Plant according to claim 1, characterized in that the device for winding up the cold-reduced tape a rotating drum shear (94), which is arranged next to the last roll stand (89) and optionally "actuated" can be to cut the strip after coming out of the last roll stand, and that on the output side of the Drum shears a winding device (95) is arranged, which immediately after making a cut through the Drum shears start winding a new bobbin. 15. Continuously working reducing roller mill essentially as described and illustrated in the drawings with reference to the drawings. 909825/0025