MXPA01000680A - Rolling stand with crossing back-up and/or working rolls - Google Patents

Abstract

The invention relates to a rolling stand comprising back-up and working rolls for rolling plates and strips in which the upper and lower working rolls together with their corresponding back-up rolls can be displaced by pair-wise inverse horizontal displacement of the chocks holding each roll in the column windows from their common vertical plane into positions in which the vertical planes extending through the rolling axes of the working and back-up rolls cross over. The roll chocks (21) of each pair of rolls (2a, 3a and 2b, 3b) formed by the upper and lower back-up and working rolls are housed in one of two cartridges (4a, 4b) which extend horizontally into the column windows (6) located on either side of the rolling stand (1) and guided therein such that they can be vertically and/or horizontally crossed. The cartridges (4a, 4b) can be pivoted in opposite directions about a common, central vertical axis (S) which is embodied by upper and lower centering spigot bearings (10, 11) provided for at the cross girder and the cartridge (4a, 4b). In the area of the column windows (6) each cartridge (4a, 4b) is vertically supported on the rolling stand frame (1) via sway braces (8) mounted on cardan joints (at 9) at both ends.

Description

LAMINATOR FRAME WITH CROSSED WORK AND / OR WORK CYLINDERS Description of the invention The invention relates to a frame of the laminator with support and / or work cylinders for laminating sheets and tapes in which, by means of the horizontal displacement by paires in contra-sense of the mounting parts that house each cylinder inside the windows of the frame, the upper and lower working cylinders, possibly with the supporting cylinders associated with them, can be moved out of the common vertical plane to positions in which they intersect. vertical planes that extend through the axes of the cylinders of the work and support cylinders. Systems in which a twist in opposite direction of upper and lower cylinders of a four-roll mill frame are also known as Pair-Cross-Rolling-Systems (cross-roll systems in pairs). Through the crossing of the cylinders and the crossing of the cylinder axes, the profile of the rolled material can be adjusted without having to apply the high bending forces of the work rolls that are required in another way. An advantage that results from this is the increase in the service life of the bearings.

Systems are also known in which either the work rolls or only the support rolls are crossed, in order to adjust or influence the required profile of the rolled stock. For the transposition (crossing) of the cylinders the most diverse solutions have been proposed. The European patent application 0 525 552 Al proposes for the workpiece and support cylinder workpieces common displacement blocks which are arranged between the mounting parts and the cylinder frame and which, on their faces facing away from the workpieces assembly have cuneiform surfaces corresponding to vertically adjustable displacement drives having equal cuneiform surfaces. When moving these adjusting drives, the cuneiform surfaces sliding one on the other cause a horizontal displacement of the displacement blocks, whereby these displace the laterally adjoining assembly parts and the cylinders cross in pairs. By the same writing also knew other actuators of adjustment like hydraulic cylinders or spindles that act mechanically on the pieces of assembly with which in each case horizontally move the pieces of assembly to change the positions of the cylinders inside the frame window. Another known solution (DE 195 10 694.6) for crossing cylinders proposes to effect the displacement of the pairs of cylinders by displacement blocks configured as U-shaped pressure pieces whose cup-shaped webs adjoin the outer sides of the pieces and whose legs embrace the column of the cylinder frame on both sides. In order to displace the pressure pieces, in both their legs that embrace the column of the frame of the cylinder frame are provided transverse holes in which rotatable eccentrics are housed having axes parallel to the axes of the transverse holes, arranged in the cylinder frame . All these cross-rolling and pair-cross-rolling systems (cross-rolling and cross-rolling in pairs) are very complex, they usually require special bearings for the work cylinders, it is necessary to provide axial blockages in the cylinders or sets of cylinders to be able to absorb the axial forces that are generated due to the inclined position of the cylinders conditioned by the system. Another disadvantage is that the adjustment components are arranged in the area of the guides of the structure that impede the change of cylinders Eccentrics and guides are particularly complex manufacturing methods. From the state of the art that is known through document DE 195 10 694.6, the task of the present invention is to create a frame of the laminator with simple adjustment drives and high stability of the system, which allows with simple construction elements the cross-linking of the cylinders with conventional bearings. For the solution of the problem it is proposed according to the invention that each pair of cylinders formed by upper and lower working and supporting cylinder is housed with its cylinder mounting parts in one of two cisterns extending horizontally within the windows of the frame of the cylinder frame and within these is guided so that it can be displaced vertically and / or horizontally, that the chassis can rotate in counter-direction around a common vertical central axis that is formed by upper and lower centering support pivots that are provided on the crossbar of the frame and the chassis, and that each chassis rests in the area of the windows of the frame vertically against the frame of the frame of the laminator through pendular supports mounted on cardan at both ends.

The invention is also applicable if a double laminator train with only two working cylinders is used. In this case, it is provided according to the invention that each working cylinder is housed with its cylinder mounting parts in one of two chassis that extend horizontally within the bilateral windows of the frame of the cylinder frame and within these is guided from In this manner, it is possible to move vertically and / or horizontally, so that the chassis can rotate in counter-direction around a common vertical central axis formed by centering pivots that are provided on the transverse beam of the frame and on the chassis, and that each chassis support vertically in the area of the windows of the frame against the framework of the frame of the laminator through pendular supports mounted in cardan at both ends. Furthermore, it is also conceivable to apply the invention in rolling frames in which the working rolls are fixed in such a way that they can not be tilted and that the supporting rolls can be crossed. In the case of a rolling mill of this type, it is proposed according to the invention that each support cylinder be housed with its cylinder mounting parts in one of two chassis that extend horizontally within the bilateral windows of the cylinder frame and inside. of these guide so that it can be displaced vertically and / or horizontally, that the chassis can rotate in opposite direction around a common vertical central axis formed by centering support pivots that are provided in the transverse beam of the frame and in the chassis, and that each The chassis is supported vertically in the area of the windows of the frame against the frame of the frame of the laminator through pendular supports mounted on cardan at both ends. With the proposed construction, a highly effective solution is created with very simple mechanical elements. Complicated adjustment constructions with expensive axial mounting units are dispensed with because the centering pivot reliably absorbs the high axial forces generated in the chassis by the crossover of the cylinders; since the centering pivot centrally arranged does not allow an axial displacement of the chassis during tilting, the vertical support of the chassis on movable pendular supports allows both the tilting movement and also a thermal expansion of the chassis without deforming stresses in the system. . By introducing the pressure of the cylinder through the pendular supports in the transverse heads of the cylinder frames, the they produce contractions in the chassis as they are known in the cylinder frames in conventional rolling mills. As a result, it is possible to choose a smaller clearance between the mounting part and the guide, which means a better and safer guide of the cylinders. The inclination of the chassis with the respective cylinders or pairs of cylinders housed therein can be carried out according to an improved feature of the invention by means of force-generating drives with a substantially horizontal action which attack the cylinder frame on the one hand and another side in the respective chassis. The mechanical synchronization elements prevent the chassis from being tilted inside the cylinder frame. Conveniently chassis can be clamped between hydraulic cylinders disposed bilaterally so that a guide is guaranteed without slack of the chassis. According to another preferred solution of the invention, it is proposed that the chassis can be hydraulically balanced against the upper and lower pendular supports. The lower roll then serves simultaneously to raise the system for the cylinder change as well as to allow a displacement of the stepped wedges to adjust the line of passage.

In another design according to the invention it is proposed that the hydraulic cylinders for positioning the pair of cylinders housed vertically displaceable in the lower or lower chassis are mounted inside the chassis together with the associated servo valves, as well as the cylinders of rolling and bending for the cylinders. By this, it is achieved on the one hand that the forces of the cylinder are always introduced centrally and that the assembly and disassembly of the cylinders is considerably simplified. The solution with chassis in accordance with the invention allows both a displacement in the axial direction of the work rolls as well as a positive and negative bending of the work rolls. The displacement of the work rolls is easily achieved if, according to another feature of the invention, each work roll can be displaced in the axial direction by means of a two-arm lever system whose pivot point is disposed in the chassis, of which a lever arm is connected to a force generating drive supported on the chassis and from which the other lever arm is attached in force or form to the assembly of the work cylinder. To facilitate the displacement and to be able to introduce the displacement forces without torque in the Assembly parts, according to another characteristic of the invention, it is proposed that the connection of the lever arm with the assembly part be carried out by means of rollers mounted in bearing at the end of the lever and supported against the assembly part. It is considered particularly advantageous if, according to the invention, the lever arms can be swiveled so that in the area of the mounting parts they can be tilted away transversely to the direction of displacement of the work rolls, to allow the disassembly of the work pieces. work cylinders. The system according to the invention created in this way allows a positive and negative bending as well as an axial displacement of the working cylinders in a simple and functional device with a very large adjustment zone for profile regulation and flatness. A dynamic pairwise crossing with simple elements is possible without the need for complex and costly turning or eccentric assemblies. An exemplary embodiment of the invention is shown in the drawing and is described below. Figure 1 shows a side elevational view of a frame of the quadruple laminator according to the invention, 2 shows a view rotated through 90 ° of the frame of the laminator according to FIG. 1. In FIG. 1, the frame of a frame of the quad laminator whose work cylinders 2a, 2b and support cylinders 3a, 3b are disposed is designated 1 in each case in pairs 2a, 3a and 2b, 3b in an upper chassis 4a and a lower chassis 4b, guided in a vertically displaceable manner. In addition, the working cylinders 2a, 2b can be displaced axially, ie transversely to the plane of the drawing by the bilateral levers 5. Partially covering the pairs of cylinders, the chassis 4a, 4b extend transversely to the lamination plane from one side of the frame 1 to the other and penetrate the frame windows 6 that are provided on both sides of the frame 1. Between the face 6a from each window 6 of the frame and chassis 4a, 4b a space allowing a lateral movement of the chassis 4a, 4b is left. Figure 2 shows the cylinder frame rotated by 90 °. In the area of the transverse heads Ia, Ib of the frame 1 are provided with recesses 7 within which the pendular supports 8 extend approximately vertically. The pendular supports are mounted in cardan at their ends. For this, 9 support couples are provided in the form of cups that perrriten a tilted position of the pendular supports 8 under rolling load. In order to be able to absorb safely and in a simple construction the axial forces resulting from the rolling forces that are generated by tilting the pairs of cylinders 2a, 3a; 3b, 2b, in the center of the chassis 4a there is provided a pivot that extends in the verical direction on the side away from the support cylinder 3a, which fits in the bearing 11 of the pivot mounted on the cross member of the frame of the laminator. An equal pivot 10 is positioned vertically downwards in the lower chassis 4b, which fits in the bearing 11 of the pivot in the lower crosspiece of the frame 1 of the rolling mill or in the base plate. Both pivots 10 are arranged in aligned fashion on a common vertical axis and form the turning axis S for the chassis 4a, 4b when moving the chassis in opposite direction. The upper and lower pendular supports 8 are fastened between the cross-head Ib of the frame and the chassis 4a with the help of the balancing cylinders 12 which attack in chassis 4a, 4b; the adjustment of the pitch line (adjustment of the height of the system) of the lower pair of cylinders is conventionally carried out by means of stepped wedges 15. To place the pair of upper cylinders mounted in vertically displaceable form they are incorporated hydraulic cylinders 16 together with the associated servo valves in the upper chassis 4a within it. To tilt the chases 4a4b around the pivots 10 are mechanically synchronized horizontal displacement hydraulic cylinders 17 (at 13) which act between the frame 1 and chassis 4a and 4b. By means of pre-stressed hydraulic cylinders 14 with little pressure, the system can be kept free of slack, whereby the precision of the laminate is improved. Each working cylinder 2a, 2b can be displaced in the axial direction through a two-arm lever system 5 whose pivot point 19 is disposed in the respective chassis 4a and 4b and one of whose lever arms is connected to a drive 20 is a force generator resting on the chassis 4a or 4b and the other lever arm of which is connected in a force-locking manner or in a manner in 18b with the work cylinder mounting part. The connection of the lever arm 18b with the mounting part 21 is carried out by means of rollers 22 which are arranged mounted on the end of the lever 5 and rest on the respective mounting part 21. By activating the force generator drive 20 in one or the other direction, the respective working cylinder 2a or 2b can be displaced in its axial direction. To disassemble the work cylinders 2a, 2b can be tilted outwards Each lever arm transversely to the mounting part 21 in the area of the articulation 24 as shown is striped at 23, to remove the roller 22 from the area of the mounting part. For this purpose, a hydraulic cylinder 25 is provided between the lever arms of the lever system 5 arranged on both sides of the mounting parts.

Claims (1)

1. Claims Laminator frame with support cylinders and work to laminate sheets and tapes in which, by horizontally shifting in pairs, in contrast to the mounting parts that house each cylinder inside the frame windows, the upper and lower cylinders of work, possibly with the support cylinders associated with them can be moved out of the common vertical plane to positions in which the vertical planes extending through the axes of the cylinders of the work and support cylinders are crossed, characterized because each pair of cylinders formed by upper and lower working and supporting cylinder are housed with their cylinder mounting parts in one of two chassis that extend horizontally within the bilateral windows of the frame of the cylinder frame and within these they guide so that they can move vertically and / or horizontally, that the chasises can rotate in It is formed around a common vertical center axis that is formed by upper and lower centering support pivots that are provided in the cross member of the frame and in the chassis, and that each chassis rests on the area of the windows of the frame vertically against the frame of the frame of the laminator through pendular supports mounted on cardan at both ends. Laminator frame for laminating sheets and tapes in which the working cylinders can be moved out of the common vertical plane to positions in which the vertical planes extending through the axes of the cylinders of the work rolls are crossed by horizontal displacement in contradiction of the mounting parts that house each cylinder inside the windows of the frame, characterized in that each working cylinder is housed with its cylinder mounting parts in one of two chassis that extend horizontally inside the windows of the frame of the cylinder frame and within these is guided so that it can be displaced vertically and / or horizontally, that the chassis can rotate in counter-direction around a common vertical center axis formed by centering pivot pins which are provided in the crossbar of the frame and on the chassis, and that each chassis rests vertically in the area of the windows of the frame against the frame of the frame of the laminator through pendular mountings in cardan at both ends. Rolling mill frame with a pair of support cylinders and a pair of work cylinders supported by those for laminating sheets and belts in which the cylinders of a pair of cylinders can move out of the common vertical plane to positions in which they cross the vertical planes that extend through the cylinders' axes of the cylinders of this pair of cylinders by means of the horizontal displacement in counter-sense by pairs of the mounting pieces that lodge each cylinder inside the windows of the frame, characterized in that each Support cylinder is housed with its cylinder mounting parts in one of two chassis that extend horizontally within the bilateral windows of the frame of the cylinder frame and within these is guided so that it can be moved vertically and / or horizontally, that the chassis can turn in counter-direction around a common vertical center axis formed by centering pivots that can be e are provided on the crossbar of the frame and on the chassis, and that each chassis rests vertically in the area of the frame windows against the frame of the frame of the laminator through pendular supports mounted on cardan at both ends. Laminator frame according to claim 1, 2 and 3, characterized in that to rotate the chassis, substantially horizontal axion force generators are provided which attack on the one side the cylinder cell frame and on the other side on the respective chassis. Laminator frame according to claim 1 to 4, characterized in that the chassis can be hydraulically balanced against the upper and lower pendular supports. Laminator frame according to claim 1 a 5, characterized in that for the adjustment of the pair of cylinders housed vertically displaceable in the upper chassis or the lower chassis the hydraulic cylinders are incorporated together with the associated servo valves and the balancing and flexing cylinders for the cylinders within the upper or lower chassis . Laminator frame according to claim 1 a 6, characterized in that each working cylinder can be run in the axial direction through a system of two-arm levers whose pivot point is arranged in the lower chassis and upper, from which a lever arm is connected with a force generating drive supported on the chassis and from which the other lever arm is attached in force or form to the assembly of the work cylinder. Laminator frame according to claim 7, characterized in that the connection of the lever arm with the assembly part is carried out by means of rollers mounted in bearing at the end of the lever and that rest on the assembly piece. Laminator frame according to claim 7 and 8, characterized in that in the area of the mounting parts the lever arms can be tilted out transversally to the direction of displacement of the work rolls to allow the disassembly of the work rolls. SUMMARY The invention relates to a frame of the laminator with support and working cylinders for laminating sheets and tapes in which the upper and lower working cylinders and the supporting cylinders associated therewith are moved to positions in which they intersect. the vertical planes that extend through the axes of the cylinders of the working and support cylinders by horizontally offsetting in pairs the mounting parts that house each cylinder inside the frame windows. In this, each pair of cylinders (2a, 3a and 2b, 3b) formed by upper and lower work and support cylinder is housed with its cylinder mounting parts (21) in one of two chassis (4a, 4b) that is they extend horizontally within the bilateral windows (6) of the cylinder frame (1) and are driven vertically and / or horizontally therein. The chassis (4a, 4b) can be rotated in counter-direction around a common vertical central axis (S) formed by centering pivots (10, 11) which are provided in the frame crossmember and in the chassis (4a and 4b) , and each chassis (4a, 4b) rests vertically against the frame (1) of the frame of the laminator in the area of the windows (6) of the frame a through pendular supports mounted on cardan (at 9) at both ends Fig. 1