HU212084B - Method and apparatus for uncoil coiled plate-made in coilbox apparatus - made of metal especially steel - Google Patents

Abstract

The present invention relates to a method for unwinding a pre-roll (A) of a preform plate (A) made of metal, preferably steel, in a Coilbox (D), and a front end (B) of a front end (B) released by a disc (7), a second cradle (10). ) by means of passing cutting knives (11) between blades (11a) and first roller roller stand (12) for working cylinders (19), as well as equipment for performing the process. The method according to the invention is that between the front end (B) of the front plate (A) with the demolition plow (7) and the upper roller (16) of the feed roller (15) clockwise rotation (16) and the clockwise rotating lower roller (17). and, after passing the front end (B) of the front plate (1) between the cylinders (19) of the first cylindrical roller stand (12), the scope of the description of the dispenser 3 is: 20 pages within 14 page chart)

Description

The present invention relates to a method for unwinding a metal, preferably steel, coilbox coil. a front end released from the pre-roll roller by means of a cradle roller cutter blade and a first ready-rolled roll stand between the cylinders and equipment for carrying out the process.

In 1970, the Steel Company of Canada, Limited, under US Patent No. 4,019,359, patented its specially-assembled front-loading and rewinding equipment, known worldwide as the Coilbox. It is commonly used on hot roller broadband rows installed between the reversing pre-stretcher and the finished roller rack.

The reversing pre-roller is so-called roller. the front plate is wound up in the Coilbox during the last puncture (shaping). then the machine unwinds the finished roll and feeds the front end into the finished roll rack.

Due to its many advantages, it is used in more than 20 rolls worldwide, and more are being installed.

The operation of a conventionally constructed Coilbox device is illustrated in Figure 1, denoted by D as the Coilbox device. Figure .a is a side view of a conventionally constructed Coilbox unit; the

Figure 1 is a side view of the apparatus of Figure 1a during winding and rewinding; Fig. c is a side view of the apparatus of Fig. 1a at the start and unloading of the reel plate A; Figure .d shows a side view of the apparatus of Figure 1a when the last thread is unwound.

In Fig. 1, a front plate from a pre-stretcher is received or received. the rollers 2, the bending rollers 3, the front cradle rollers 4 and the forming roller 5 serve for winding it up. The deflector shields 6 have the function of deflecting the coil roll to the centerline. Then, the demolition plow 7 is disposed, and the transfer device 8, with the spike 9, for transferring the pre-rolls onto the second cradle rollers 10. The transfer device 8 is an essential element of a conventional Coilbox device whose spindle 9 is movable in and out perpendicular to the direction of travel of the front plate, rotates freely and can be rotated 180 degrees about the axis of the transfer device with a specified length. The driven rollers 13 are arranged to move the front plate further, and the blade 11a of the cutting shear 11 is cut to cut a defined piece from the front and end of the front plate. At the end of the row there is provided a first roller stand 12 for rolling and drawing the front plate with the rollers 19.

Five to seven rows of ready-rolled roller racks pass through which form a relatively thick strip of 22-36 mm and a strip of 1.6-12 mm.

In Fig. 1b, the front plate 1 from the pre-stretcher is received and rewound by the guide rollers 2, the bending rollers 3, the first cradle rollers 4 and the forming roller 5 in the winding position. The winding of the pre-roll wound in the previous pass is carried out by the second cradle rollers 10 and the mandrel 9, while the working rollers 19 simultaneously apply tensile force to the pre-roll 1.

In Fig. 1c, after being wound, the deflector shields 6 deflect the front plate roll A into the center, and then the demolition plow 7 moves along the surface of the front plate roll A to break the front end B and bend it in a horizontal plane.

After the deflector shields are disengaged, the first cradle rollers 4 are rotated clockwise to start the unwinding process. The front plate 1 proceeds forward with the front end B towards the end cutting shears 11, where a defined piece from the front of the front plate 1 is cut off on the fly. After this has been cut off, the front plate 1 is inserted between the working rollers 19 of the first roller stand 12. After unwinding begins, the spike 9 of the transfer device 8 starts inside the front panel roll A and reaches its end position

EN 212 084 B lifts it and places it in the second cradle rollers 10 along a 180 ° arc. Also during loading, since the front rolls 12 of the first roller roller 12 pull the front plate 1, the front roll roll A rotates freely with the spike 9.

After the transfer of the pre-roll roll A into the second cradle rollers 10, the reeling takes place there, the mandrel sinking in accordance with the reduction of the pre-roll roll diameter.

In Fig. 1d, the winding of the last thread - the rear end C - of the front plate winding A is carried out from the mandrel 9, while the winding of the next front plate 1 is already in progress.

Rewinding and rewinding is said to occur cyclically.

The 8 transhipment equipment is relatively complex, expensive and maintenance-intensive, and has several technological disadvantages:

The pin 9, in contact with the internal thread of the front plate coil A, removes heat from it and makes it difficult to roll. The colder rear end C has a higher forming resistance, even with a thickness control device, to maintain the desired thickness tolerance.

- When the spike 9 is moved in and out, it does not always find the center of the front plate roller A, pushing the inner circles out and thus scrapping. causes malfunction.

- Due to its construction, it does not allow the installation of side heat shields to reduce heat loss. (The heat loss through the sides of the front plate roll is significant, and the edges of the front plate are colder than the inner parts.)

Due to the above, the abandonment of the transhipment device 8 has been claimed everywhere.

In 1990, STELCO Inc., PCT / CA90 / 00452, filed a patent application for transhipping and unwinding of spindle-free disc rolls, which was published in WO 91/09694.

Figure 2 illustrates the STELCO solution. THE

Figure 2a is a side view of the new Colibox recommended by STELCO; the

Figure 2b is a side view of the apparatus of Figure 2a while winding and unwound; the

Figure 2c is a side view of the apparatus of Figure 2a when starting and reloading the front roll of roll A; the

Figure 2d shows a side view of the device of Figure 2a when the last thread is unwound.

As shown in Fig. 2a, a new element is a pair of tilting roller pairs 18 and the first cradle rollers 4 are tiltable in this embodiment, and a new element is the water-cooled mandrel 21 pushed inside the pre-roll roll A and the support roller 20. after which it is positioned above the driven rollers 13.

In Figure 2, the winding of the Coilbox with conventional elements takes place in a manner known per se. The unwinding of the pre-roll wound in the previous turn is performed by the second cradle rollers 10 and the support roller 20, while the rollers 19 simultaneously apply tensile force to the front plate 1.

In Fig. 2c, the opening of the front end B of the pre-roll roll A and the transfer of the pre-cut end 11 to the blades 11a and the first ready roll 12 are identical to Fig. 1c. The transfer of the front plate roller A from the first cradle rollers 4 to the second cradle rollers 10 is performed with the tilting roller pairs 18 during the continuous unwinding. From the second cradle rollers 10, the unwinding of the pre-roll roll A to the last 4-5 turns is performed by the support roller 20.

As shown in Fig. 2d, the winding of the last turns by means of a support roller 20 and a water-cooled mandrel 21 having a diameter of 150 mm inserted into the inside of the front plate roll A is 150 mm in diameter.

Disadvantages of the STELCO solution:

- The 21 water-cooled spikes pushed in the last turns continue to produce cooling effects.

- The structure and mechanism of the water-cooled mandrel 21 and its automatic operation are not easy.

The water-cooled mandrel 21, although to a much lesser extent than the transhipment device, prevents the formation of a side heat shield system.

- Shield roller system 18 with high functionality, probably very maintenance-intensive.

The object of the present invention is to eliminate the drawbacks of the conventional transducer device and the above-mentioned STELCO solution, which defines the state of the art.

In our work, it has been found that the above problems can be overcome by using a suitably-formed feed-rewinding unit between the Coilbox and the end-scissors.

The present invention thus relates to a method of unwinding a metal, preferably steel Coilbox, by means of cutting end knives with front cradle rollers which have been released from the pre-roll coil by means of cradle rollers, and by inserting a the end end of the metering roller unit is rotated between the counterclockwise top rotary top roller and the clockwise bottom roller bottom roller, and after the front end of the front plate is moved between the rollers of the first finished roll stand and the metering roller top roller top roller changed. Optionally, the pre-roll roll is started by means of a roller lifting device from the first cradle rollers of the Coilbox and, if appropriate, transmitted to the second cradle rollers by means of dense-pitched, free-running rollers.

The invention further provides apparatus for carrying out said process, which apparatus is a Coilbox apparatus 3

EN 212 084 includes a cutter, demolition plow, cradle rollers, end-to-end scissors with blades, and a front roller stand with cylinders, which consists of a feed-unwinding unit between the Coilbox and the end-of-shears, with a roller, liftable, both clockwise and counterclockwise rotated, with an upper roller with a friction coefficient of μ> 0.5 and a lower roller mounted on the upper roller bearings, which is rotatable at the same circumferential speed as the transmitted front plate; , with variable angle deflector (blade or roller). The apparatus according to the invention optionally has a lifting roller which is mounted between the first cradle rollers to move the pre-roll from the first cradle rolls of the Coilbox to the second cradle rolls, and optionally a free-running roller to move the pre-roll roll between the cradle rollers.

The feed-rewinding unit has an adjustable upper roller on the front plate.

There is a variable-sized gap between the rollers of the feed and rewind unit.

The feed-rewinding unit has individually driven rollers.

Diameter of the rollers of the feed roller

400-600 mm and their surface roughened by blasting. The built-in lifting roller has a sliding bearing, hydraulically actuated and capable of exerting a force equal to the weight of the pre-roll.

The built-in free-running rollers between the cradle rollers are water-cooled and spaced at a density to ensure a smooth roll of the front roll.

In an exemplary preferred embodiment of the present invention, together with the optionally integrated lifting roller and optionally built-in free-running rollers, Figures 3.a, 3.b, 3.d, 4.a, 4.b, 4.c, 5a, 5b. (The l.a, l.b, l.c, l.d,

2. a. Figures 2b, 2c, 2d are described in the state of the art

Figure 3 is a side view of the proposed apparatus in its basic state; the

Figure 3b is a side view of the device of Figure 3a during rewinding and rewinding; the

Fig. 3c is a side view of the apparatus of Fig. 3a at the beginning, during and during the unwinding of the front panel roll A; the

Figure 3 d is a side view of the device of Figure 3a when the last thread is unwound; the

4 is a side elevation view of the dosing and rewinding unit; the

Figure 4b is a side view of the dispenser unrolling unit in the "dispenser" position; the

Fig. 4c is a side view of the unrolling unit unrolling unit; the

Fig. 5 is a side view of the dispensing and reeling unit; the

Figure 5b is a plan view of the dosing and rewinding unit.

Figure 3a shows that it is traditionally built

Fig. 1a is a new element compared to Coilbox D of the prior art, which is a feed-rewinding unit 15 with a top roll 16, a lower roll 17 and a baffle 23 disposed between the second cradle rollers 10 of the Coilbox D and the end cutter 11. A detailed description of the feed-rewinding unit 15 is shown in Figures 4 and 5. Optionally, new elements further include a lifting roller 4a disposed between the first cradle rollers 4 and a high pitch free roller 14 mounted between the first cradle rollers 4 and the second cradle rollers 10.

In Fig. 3b, the winding in the Coilbox D is carried out with conventional elements as described above. The remnant of the pre-roll wound in the previous pass is unwound by the feed-rewind unit 15 while the rollers 19 simultaneously apply tensile force to the pre-roll 1.

In Fig. 3c, the front end B of the pre-plate roll A is dismantled and the front plate 1 is conveyed to the end-cutting scissors 11 as described in Fig. 1c. The opening of the front end B of the front panel roll A and the upper roller 16 of the feeder unwinding unit 15 and the guide plate 23 are raised. He is in an "introductory" position. As the front end B of the front plate 1 passes between the rollers 16-17 of the feeder unwinding unit 15, the upper roller 16 closes to the first plate 1 with a specified compression force, due to their direction of rotation, the upper roller 16 and the lower roller 17 the front plate 1 in the direction of the end-cutting shears 11 and then in the direction of the first ready-roll roll 12.

As soon as the rollers 19 have begun to form the front plate 1, the dispensing and rewinding unit 15 moves to the "unwinding" position, as shown in Fig. 4c. The upper roller 16 rises so that the gap between the rollers 16 and 17 is between 40 mm and 70mm, then the upper roller 16 rotates in a clockwise direction, while the lower roller 17 remains unchanged. The winding disc A is unwound from the first cradle rollers 4 by approx. 40-50s.

After this time, the lifting roller 4a, optionally positioned between the first cradle rollers 4, rises, unlatches the front plate roller A from its equilibrium position between the first cradle rollers 4 and then causes the tensioning roller A on free-running rollers, the second cradle rollers 10 are provided. The small diameter of the freely running rollers and the tightest possible installation ensures that the front plate roller A runs smoothly into the second cradle rollers 10, where it again returns to equilibrium and continues to be unwound by the driven second cradle rollers 10. Meanwhile, the D Coilbox sets to receive and rewind the next front panel.

The unwinding of the front panel roll A from the second cradle rollers 10 takes place until the weight of the remaining front panel roll A is large enough to hold the front panel roll against the pulling force in the cradle rollers.

HU 212 084 B

Depending on the chemical composition of the rolled material, the rolling temperature and the thickness of the front plate, this is approx. Provided up to 2-4 kg / mm specific pre-roll weight. Below this weight limit, the remainder of the front plate roller moves out of the second cradle rollers 10 and proceeds to the feeder unwinding unit 15 where it is unwound by the upper roller 16 in the "unwinding" position (also by the baffle plate 23).

In Fig. 3d, the last roll C of the pre-plate roll, the rear end C of the pre-plate 1, is unwound by the feed-rewind unit. The proper size of the upper roller 16, the surface roughness, the set 40-70 mm gap and the nearly vertical baffle 23 together ensure that the rear end C (the last thread) is unwound, flattened and does not overlap. In the figure, Coilbox D is already winding up the next pre-roll A, illustrating the continuous, smooth, cyclic repetition of operation.

Since the essence of our proposal is the feed-rewinding unit 15, the operating phases thereof are described in detail in FIG.

In Fig. 4a, the upper roller 16 awaits the approaching front end B in the "up" position. Its direction of rotation is anticlockwise. The gap between the rollers may be R 1 = 150-200 mm and h is the thickness of the front plate.

The deflector plate 23 moves with the upper roller 16, which then takes up an oblique position.

The function of the table 22 is to introduce the front end B between the upper roller 16 and the lower roller 17. It is designed to facilitate the introduction of the downwardly sloping front end B, but is recessed deep enough to prevent abrasion of the remainder of the front roll A when arriving during unwinding.

In Fig. A4.b, the feeder unwinding unit 15 operates in the "feeder" position, the upper roller 16 clamping the front plate 1 to the lower roller 17, so that the gap R ₂ between the rollers 16-17 is the same as the respective plate thickness h. usually 22-36 mm.

The clamping force of the upper roller 16 can be selected depending on the tensile force to be applied in order to unwind low weight (less than 5 kg / mm) pre-rolls to be fed to a finished roll stand.

Heavy-duty pre-rolls do not require this feed function. When the upper roller 16 is lowered, the associated baffle plate 23 is rotated to a nearly vertical position. The direction of rotation of the upper roller 16 is counterclockwise.

4c, the gap between upper roller 16 and lower roller R ₃ = 40-70 mm rotates clockwise to aid in unwinding of baffle 23 and has a circumferential velocity equal to the first 12 of the front plate 1. In FIG. the speed of feeding the roller into the roll stand.

The figure shows the winding of the last thread, the upper roller D = 400-600 mm in diameter. Within this diameter range, the force relations are such that the final thread, the trailing end C, does not collapse, but unwinds, flattens to ensure a smooth end cut and roll.

The surface of the upper roller 16 should be roughened by abrasive blasting to ensure a friction coefficient of μ> 0.5.

The structure and main parts of the dispenser-unwinding unit 15 are shown in Figure 5.

In Fig. 5a, the upper roller 16 can be tilted 16.b and 16j (not shown) to the left or right. is integrated in right-hand bearing housings with rolling bearings. Referring to FIGS. In the bearing housings 16.j, the baffle plate 23 is rigidly fixed.

In Fig. 5b, the upper roller 16 for tilting the bearing housings 16b and 16j is shown in Figs. 24.j hydraulic cylinders are used. Each of the upper rollers 16 and the lower rollers 17 are provided with separate drives comprising the cardan shafts 27a, 27f, the gears 25a, 25f and the DC motors 26a, 26f.

It is preferred that the upper roller 16 and the lower roller 17 have the same peripheral speed as the front plate 1 (for non-slip purposes) by computer control.

Advantages of our proposed solution:

- The costly and maintenance-intensive, water-cooled spike can be eliminated.

- The water-cooled mandrel has no contact with the internal thread of the pre-roll, so that the end of the pre-roll can also be rolled into a finished product suitable for the program.

- There is no water-cooled spike moving in and out, which would cause a malfunction in the collision with the internal thread in the event of a control error.

- Our solution, that is to say, the "feed" function of the feed / rewind unit, provides the means of winding and rewinding any lightweight pre-roll through the Coilbox.

- Nothing prevents or hinders the development of a side heat shield system.

- Rolling without a coilbox - so-called rolling. pass mode - conditions are also provided.

- The applicability of the locally required 'double cut line' technology is ensured. In some cases, two smaller masses of hot rolled coil rolls are to be made from a high weight roll of rolls, in which case the roll of roll rolled from a roll of coilbox is cut into two pieces during rolling and rolled as two separate pieces.

- When using the optionally built-in lifting roller solution, no overloading is required because the remnant of the pre-roll roll, starting with the lifting roller, leaves the first cradle roller in time, providing space for the next piece without winding.

Claims (8)

A method for unwinding a metal sheet, preferably steel, made in a Coilbox (D), a front roller (4), a second cradle roller (10), a front end (B) which is released from the roller roller (A) by a plow (7). by cutting end knives (11) between the blades (11a) and the first roller stand (12) between the cylinders (19), characterized in that the front end (B) of the pre-roll roll (A) has been released by a splitting plow (7). passing the counter-clockwise upper counter-clockwise roller (16) and the clockwise lower-clockwise lower roller (17) of the metering roller assembly (15), after the front end (B) of the front plate (1) is driven by the cylinders (12) of (19), raise the top roller (16) of the metering-unrolling unit (15) and rotate it clockwise and, if necessary, start the pre-roll (A) from the first cradle rollers (4) of the Coilbox device (D) and transfer it to the second cradle rollers, optionally with dense-pitched, free-running rollers (14) (10). Apparatus for carrying out the method of claim 1, comprising a Coilbox device (D), a demolition plow (7), a first cradle roller (4), a second cradle roller (10), and an end cutter (11) provided with knives (11a). further comprising a first roll roll stand (12) provided with cylinders (19), characterized in that there is a feed-unwinding unit (15) between the Coilbox device (D) and the end-cutting scissors (11), which is a sheet roll (A). a rear roller (16) with a friction coefficient of μ > provided with a lower roller (17) and a variable angle deflector (plate or roller) (23) rigidly fixed to the bearings (16b and 16j) of the upper roller (16) and optionally a first has a lifting roller (4.a) for starting the front plate roll (A) from the first cradle rollers (4) of the Coilbox (D) to the second cradle rollers (10), mounted between cradle rollers (4), In addition, in this case, free-running rollers (14) are provided between the cradle rollers (4, 10) for conveying the pre-roll roll (A). Apparatus according to claim 2, characterized in that the dosing-unwinding unit (15) has an adjustable upper roller (16) on the front plate (1). Apparatus according to claim 2 or 3, characterized in that there is a variable-sized gap between the rollers (16, 17) of the metering-unrolling unit (15). 5. Apparatus according to any one of claims 1 to 3, characterized in that the feed-unwinding unit (15) has individually driven rollers (16, 17). 6. Apparatus according to any one of claims 1 to 3, characterized in that the rollers (16, 17) of the dosing-unwinding unit (15) have a diameter of 400-600 mm and a roughened surface. 7. Apparatus according to any one of claims 1 to 5, characterized in that the built-in lifting roller (4.a) is capable of exerting a force of sliding bearing, hydraulically actuated and of the same weight as the pre-plate roll (A). 8. Apparatus according to any one of claims 1 to 4, characterized in that the built-in free-running rollers (14) between the cradle rollers (4, 10) are water-cooled and arranged in a density to ensure a smooth transfer of the sheet roll (A).