MXPA02001792A

MXPA02001792A - Strip casting machine comprising two casting rollers

Info

Publication number: MXPA02001792A
Application number: MXPA/A/2002/001792A
Authority: MX
Inventors: Barbe Jacques; Streubel Hans; A Marti Heinrich
Original assignee: Main Management Inspiration Ag
Priority date: 1999-08-20
Filing date: 2002-02-20
Publication date: 2003-11-07

Abstract

The invention relates to strip casting machines comprised of two parallel casting rollers (1, 2) whose bearing journals (8, 9) are supported on a stand (3). Cooled roll barrels of the casting rollers (1, 2) and narrow lateral parts (5) delimit a casting gap (6). The aim of the invention is to obtain an optimal ratio between the width of the casting machine and the maximally castable strip width, to provide for a simple stand construction both for changing rollers as well as for exchanging narrow lateral parts, and to attain an improved protection against oxidation. To these ends, the invention provides that the cooled roll barrels are constructed as cylindrical casings (4). The casing (4) should be supported on a stationary axle, which is fixed on the stand (3), via the concentric support rings which project inside the casing (4) on both sides and which are connected to the same.

Description

MACHINE OF COLADA GIVE BAND WITH TWO ROLLERS OF COLADA, FIELD OF THE INVENTION The invention relates to a band casting machine consisting of two casting rollers disposed in parallel or essential in accordance with the main idea of the claim 1. BACKGROUND OF THE INVENTION It is known to manufacture continuous belts with band-boring machines from a liquid metal melt, especially from a steel melt. The liquid metal is supplied continuously to a casting separation defined by the moving rollers. Before and in the separation or casting space, the liquid metal solidifies and a band at least partially solidified is driven through the casting rolls. This band can also be subjected to other continuous or discontinuous operations, such as cooling, reheating, hot or cold rolling, profiling, surface treatment, beading, etc.

In addition, in web casting machines with two glue rollers essentially arranged in parallel, it is known to limit the casting gap to casting side parts, such casting side parts can be supported on the front sides of the casting rolls or between the casting rollers. casing surfaces or portions of the casting rolls and which are arranged so as to be displaceable, for example, for the adjustment of the shape of the strip. The casting rollers are arranged in a frame, and are essentially displaceable or pivotable transversally with the longitudinal axis of the casting roller for adjusting the thickness of the band. For the cooling of the liquid metal, the casting rollers, especially the casting roller bearings, are intensively cooled from inside and / or from outside with a cooling medium. As a rule, the casting rollers are made of different materials, a material with a greater heat conducting capacity being used for the cooled bearings, and a highly resistant steel is selected for the bearings and the core of the rollers. The pins of the bearings, the core of the rollers and the saddles form a unit of rotating roller rotating at oriament e by means of the impulse. The impulse ss leads to the pins of the roller and through this is transmitted to the bearings, This conformation conccida by the construction of classic laminates or by the classic construction of driving rollers for ingot casting devices, requires the lateral space from the casting apparatus to the impulse and thereby impairing the teral access to the separation or casting space and to the narrow lateral parts that limit the casting separation in its length. This construction of the known casting rollers also influences also the construction of the frame, the space required and in multi-string apparatuses, influences the change of the casting rollers and the narrow side parts, the protection against oxidation of the metal liquid and the cast strip and the actions during operation and for the maintenance of the apparatus. From WO 97/23318 A, a particular web casting machine of the type of the invention is known, with casting rollers arranged in parallel. The casting rolls form a space or separation of casting which It is sealed by means of narrow side parts. In the cylindrical portions of the fixed casting roller shaft, a cooled casting roller jacket is placed which is driven by laterally disposed transmission elements. In order to compensate for the thermally induced variations in the casting roller jacket, fixed sliders with a partially cciilliinnddrriiccaa surface are arranged on the fixed roller and work together with adjusting elements which act hydraulically. With the help of the sliders, an individual radial adjustment of the caster caster is made in relation to the axis ie the vertical caster rollers. The driving moments applied to the casing of thin casting rollers, laterally to their front sides, cause relatively high torsional forces and with this rollings of the caster of the casting rolls that can not be compensated by the adjustable sliders.; In addition, the hydraulic positioning of the caster of the casting rolls directly on the cylindrical arts of the axis of the fixed casting rolls is complicated, and difficult to maintain hermetically.

SUMMARY OF THE INVENTION The invention proposes the task of constructing a band casting machine that overcomes the disadvantages of the casting and that especially provides an optimum proportion between the width of the machine and the width of the band to be melted, a simple structure both for the change of the rollers as well as for the adjustment and change of the lateral parts is narrow that limit the separation of casting, allowing a better accessibility and for the compact structure a better protection against oxidation of the metallic material and the product strained. Agree with? the invention, this task is solved by the sum of the features of claim 1. With the invention it is possible to place the impeller of casting rollers in such a way that the requirements mentioned in the task can be satisfied In addition the structure of the rollers can adapt; better to the requirements as a casting roller in B1 direction of a cooled mold that can be taken from other embodiments.

Together with the protection against oxidation of the metal supply, in the band casting machine according to the invention, it is easily It is also possible to achieve oxidation protection of the cast product with corresponding quality improvements. As supporting elements, portions of the cooled casing of the casting rolls can also serve, so that the casing is modeled in one piece with the support elements and is mounted rotatably on the stationary axis, advantageously, they are the supporting elements are constructed in the form of concentric support rings which are connectable to the sleeve, which are mounted on a fixed axis. The impulse can be made directly indirectly to the casing part of the casting rolls. An advantageous solution is achieved if a first part of the integrity of the support rings penetrates the jacket and has feeding and cooling water outlet perforations to produce a circulation of cold water between the immobile shafts and the jacket. A second part of the length of the support rings protrudes outwardly from the sleeve and is provided with support and impulse elements on at least one side for a rotational movement, the sleeve rigidly joined on the rings of are provided with radial perforations and grooves for the supply of the cooling medium, from the stationary shaft to the jacket. Here the stationary shaft can be provided on both sides with axial bores and in the end area of the axial peelings have radial bores, which are directed like the grooves of the support rings. The cooling of the sleeve itself can also be carried out by means of several solutions already known in the state of the art for a mean cooling circulation. A simple and effective solution as cooling is that the jacket is provided along its periphery with perforations parallel to the longitudinal axis of the rollers for a circulation of the cooling medium, where the direction of the current changes in perforation. to drilling. The number of perforations must thus be an even number. In order to reduce the time needed to change the casting rolls, the stationary shaft is provided with supply and withdrawal means of the cooling medium, which when changing or when lifting the rollers from the frame, simultaneously uncouple the supply and removal of the cooling medium and / or water tension plates are provided for the water supply and / or multiple couplings for grease, power supply, gas connection, for example inert gas or air and for the coils. The quick and easy positioning and fixing of the casting rolls is achieved if the stationary axle is provided on both sides of the casing with a respective stop and support surface and if they are disposed there are casting roll supports which receive the abutment or support surfaces. For the fixation of the stationary shaft, a pivoting arm can be articulated on both sides of the frame as a fixing device. To slow down the metal bath in the pouring notch, an electromagnetic brake can be arranged between the rotary sleeve and the stationary shaft. A special advantage with reference to the positioning and fixing of such electromagnetic brake, is seen <; in which it can be placed stationary on the immobile axis DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in more detail by means of construction examples with reference to the figures, where Fig. 1 shows a schematic view of a partially illustrated band rolling machine. Fig. 2 shows a vertical cutting through a casting roller. Fig. 3 shows an enlarged cut of a casting roll with cooled jacket and direct drive. by means of a ring moment motor. DESCRIPTION OF THE INVENTION In the figure '. There are two casting rollers 1 and 2, arranged essentially parallel with the cylindrical sleeves 4, on a frame indicated in the form of points 3. A casting distance 6 limited on both sides of the casting rolls 1, 2 by means of narrow side parts 5, is indicated by means of thick lines. Such casting separation 6 can be constructed between heel pins of 1-15 mm, preferably 1.5-5 mm, indicated with the numbers of the casting rolls 1, 2, and on the support surfaces 10, 11 constructed quadrangularly. The abutment surfaces 12, 13 and the mounting pins 8, 9 are used as a roller stop in the frame 3.

At least one of the abutment surfaces 12, 13 of the support 8, 9 is adjustable by means of a cylinder regulated in position and arranged in the frame 3, for the adjustment of the desired space or casting separation For simplicity this is indicated as a double arrow in figure 1. direction of the fixed roller, can be carried out with adjustable position cylinders. For this, adjustment uses or other adjustment means may also be provided which act accordingly. With 15, 15 'schematic gears are shown to drive the glue rollers 1, 2. Such web casting machines can find application for different casting metals preferably for the manufacture of steel strip. Figure 2 is shown with 21 a casting roller in a step augmented with respect to Figure 1. The casting roller 21 is supported on a frame 23 only: epresentado partially. A motionless axis 24 that extends over the entire roller 21 is mounted with its four corners of approximately one length 25 on the frame 23. With an entire arrow 26 is indicated to the length of a pellet of the casting roller 21. This pellet consists of the essentials of a ca is; cylindrical 27 which is rigidly joined by radicle of the drag wedges 28 with the tension ring with two support rings 29, 29 The jacket 27 is cooled with a cooling medium, preferably water. The two support rings 29, 29 'are mounted by means of sliding ball or roller supports 31, on the shaft 24. A first part of the ring length 29, 29' penetrates the sleeve 27 and is provided with radial supply and withdrawal holes 32 for the cold water, which in turn open into the slots 33. The slots 33 are directed to the supply and withdrawal perforations 34, 42 of the stationary shaft 24 and of the sleeve 27 By means of other perforations 30, 30 'in the axis 24, the cooling water is led from the frame 23 to the support rings 29, 29 'and to the path 27. A second part of the length of the support ring 29, 29', s from the jacket 27 outwardly and the support ring 29 is in dynamic connection with an impeller, for example with a gear impeller 36 for the casting roller 21. The gear impeller 36 can if desired be placed flail on the stationary shaft 24. The is coupled with a ring gear 37 which is fixedly screwed < n the support ring 29. In Instead of the illustrated gear wheel impeller 36, 37, it is possible in the direction of an alternative solution to drive the casting rolls 21 with one or more annular torque motors. The cooling of the pellets of the casting rollers or of the cylindrical jacket 27 can be ensured along their periphery by the circulation of water in the axially disposed perforations 39. The coupling and uncoupling of the feeding and withdrawal of water to the casting rolls 21 is carried out simultaneously with the positioning or lifting of the rollers 21 from the frame 23 or by means of water tension plates., for water and / or by means of multiple couplings for the supply of gas, energy, gases, for example inert gas and air and for controls. For fixing the stationary shaft 21, for example, a tilting arm 40 is mounted on both sides of the frame 23. The structure of the roller allows a particularly advantageous installation of an electromagnetic brake 41 inside the casting roller 21, between the stationary axis 2. and the rotating shirt 27.

The electromagnetic brake can reduce the turbulence in the metal bath, especially the level of the bath above the casting recess. The electromagnetic brake is advantageously arranged stationary on the stationary axis. In the casting rollers 21 for wide strips, the cylinder track 27 can have, between the two support rings 29, 29 ', additional support rings for supporting the sleeve 27 on the stationary shaft 24. As well these additional support rings are joined with the sleeve 27 and mounted radially and axially on the shaft 24 with ball bearings or • rollers. In FIG. 2, the sleeve 27 is shown as a cylindrical body. The sleeve 27, without deviating from the object of the investment, can also have a slightly domed or cone-shaped shape. Figure 3 shows the increased cut on one side of casting roller 1. Here is the cooled jacket constructed of two parts. The sleeve part 27 'containing the hot jacket pellets is connected with a cooling medium which runs axially through the guides forming the perforations 39. The other sleeve part 27 is provided in one piece with the same. support element 29 '. Both sleeve parts 27, 27 'are preferably joined together by means of an electronic welding. The sleeve part 27 or its supporting element 29 'with the aid of the support element 31 is mounted on the stationary shaft 24 in a rotary manner. The driving of the rollers thus formed is preferably carried out by means of an annular rotation moment without a brush 3 36 arranged directly on the shaft 24. The supply and withdrawal devices 30 of the cooling medium are also recognized. perforated on the ex 24 The other side not shown on 1 casting roller, is made coincidently with or without drive

Claims

NOVELTY OF THE INVENTION Having described the invention as above, it is claimed as a property that contained in the following is REIV INDICATIONS 1. Machine, casting consisting of two casting rolls arranged in parallel, which form one. notch or separation of casting limited on both sides by means of parts llaatteerraalleess aannggoossttaass and v a frame carrying the casting rollers d [onde the casting rollers have balines enfí "riados made of a shirt essentially cylindrical, which form the notch of adjustable casting and bearing pins for the support of the casting rollers on the frame, the machine is characterized in that the casing of the respective casting rolls is supported on when a support element rotatably arranged on the stationary fixed shaft is supported. in the frame, especially with support elements arranged on both sides, or by means of at least one support element which penetrates especially on both sides in the sleeve and rests on the shaft where at least one of the support elements is urged .
2. Band casting machine according to claim 1, characterized in that the supporting elements are concentric support rings that can be connected to the sleeve.
3. Casting machine according to one of the claims 1 or 2, characterized in that the cylindrical jacket between the two support rings is supported by additional support rings on the ex and inmovi 1.
4. Casting machine band according to one of claims 1 to 3, characterized in that the support elements are part of the path
5. Casting machine according to at least one of claims 1 to 4, characterized in that a first part of the length of the support elements or of the support rings is in the sleeve and has supply and withdrawal perforations for a circulation of a cooling medium between the stationary shaft and the sleeve and a second part of the length of the arms. supports or support rings protrudes from the sleeve and is provided with bearing elements and drive elements for a rotational movement of the a shirt provided with the support elements or the shirt rigidly connected with the support rings on the stationary shaft
6. A band casting machine according to at least one of claims 1 to 5, characterized in that the support ring is it fixes a dialed crown having a dynamic connection with the gear of a stationary impeller
7. Band casting machine according to claim 6, characterized in that a drive gear is placed on the flank of the stationary shaft.
8. Strip casting machine according to the re-indication 6, characterized in that one or more annular rotation moment D motors drive the sleeve by means of the support rings
9. Strip casting machine according to at least one of claims 1 to 8, characterized in that the support rings are preferably provided with radial perforations or slots for supplying the cooling medium from the stationary shaft to the sleeve.
10. A band casting machine according to claim 9, characterized in that the Immobile shafts are provided on both sides with axial and radial perforations which are directed to grooves of the support rings DS.
11. A band casting machine according to at least one of claims 1 to 10, characterized in that the sleeve is provided along its periphery with axially arranged perforations for the circulation of a cooling medium.
12. A band casting machine according to at least one of claims 1 to 11, characterized in that between the support rings and the sleeve, drive wedges are provided with a tension ring.
13. Strip casting machine according to at least one of claims 1 to 12, characterized in that the immobile shaft is provided with a device for feeding and removing the cooling medium that when placed or when the casting rollers are removed from the frame, simultaneously the supply and withdrawal conduits of the cooling medium are coupled or uncoupled. in the bast idor. 14 Web casting machine according to at least one of claims 1 to 13, characterized in that the immobile shaft is provided on both sides of the road with a stop surface and a supporting surface, and upper stop and support surfaces are arranged in the frame for the placement of the casting rolls. 15. Strip casting machine according to claim 14, characterized in that for fixing the stationary shaft on both sides of the frame, a retaining device 16 has been provided. Strip casting machine according to at least one of the claims 1 to 15, characterized in that an electromagnetic brake is placed between the rotating sleeve and the stationary shaft, ppaarraa llaa bbaannddaa mmeettáálliiccaa between the rollers. A band casting machine according to claim 16, characterized in that the electromagnetic brake is disposed inside the casting rolls stationary on the immersed axis 1. 18. Band casting machine according to at least one of the claims 1 to 17, characterized in that the impeller of the casting rolls is carried out by means of a motor arranged on or to one side of said preferably a brushless rotating moment motor, 19. Machine d, and band casting according to at least one of claims 1 to 18, characterized in that the sleeve is constructed of an part or several 20. Strip casting machine according to claim 19, characterized in that the union of the parts of the sleeve is preferably an electron beam solder joint. 21. Strip casting machine according to at least one of claims 1 to 20, characterized in that the sleeve is structured with two or more sleeves of different material. 22 fAl ioo RE S UMEN The web casting machines consist of two casting rollers arranged in parallel (1, 2), whose spikes of the rider (8, 9) are supported on a frame (3) Rolled pellets of the rollers of cabbage rollers. ada (1, 2) and narrow side parts (5), limit a pouring step (6). The object of the invention is to obtain an optimum ratio between the width of the casting machine and the maximum width of the strip to be cast, to provide for a simple frame construction that allows both the change in the rolls and change narrow side parts and, achieve improved protection against oxidation. For these objects, the invention provides that the cooled roller pellets are constructed as a cylindrical box or sleeve. The cylindrical sleeve or case (4) must be supported on a stationary axis that is fixed in the frame (3), by means of of concentric support rings that project into the road to both laks and that are connected to the same.