Abstract: A rolling mill frame for the rolling of different rolled stock which requires different rolling forces and which has working rolls, back-up rolls, optionally a roll being device for the working rolls and optionally a device for adjusting and balancing the back-up rolls which has pairs of adjusting cylinders (3) between the roll stand (1) and the chucks (2) avoids large friction losses in that the adjusting cylinders (3) are each comprised of a telescoping cylinder (4) in which a first concentric (5) with a larger diameter for high rolling forces and a concentric cylinder (15) with smaller diameter for smaller rolling forces are provided.

Abstract: Vibration damping apparatus (40) includes a body in the form of backup roll balance piston (42) positionable for sliding movement in an enclosure in the form of cavity (44) in the lower backup roll chock (30) of the mill stack (10). The body of the piston is a casing which performs the role of a conventional postion. A damping means is integral with the piston (42) for providing vibration damping of opposing backup roll chocks (24, 30). The damping means is a specially designed absorption system to provide tuned stiffness and damping elements which act in parallel and are located in compartment (46) at an uppermost end or cap of the piston (42). A second vibration absorbent compartment portion (56) of the piston (42) also includes vibration absorbing components. Portion (56) is an integral cap located at the end of the piston (42) in contact with the fluid (52).

Abstract: The invention relates to a roll stand for hot-rolling or cold-rolling metallic strips. Said roll stand comprises back-up rolls and work rolls (2,3; 4,5) which are respectively positioned in chocks (6; 7) in a rotating manner. Each chock (6; 7) can be displaced on two sides in guiding devices (8) of the column frame (9) for adjusting the roll gap (10) and can be additionally displaced on at least one side for adjusting the play, by means of horizontal piston cylinder units (11) arranged in the column frame (9). The aim of the invention is to completely eliminate the play in the vertical guiding device (8) of the work roll chocks (6; 7) during the rolling.

Abstract: A rolling stand has a frame and a pair of support shafts centered on respective parallel shaft axes and each having an outer end projecting past the frame, inner and outer axially spaced bearing portions in the frame, and a gear between the respective inner and outer bearing portions. Each outer bearing portion lies between the respective inner bearing portion and the respective outer end. Respective rolls are carried on the outer ends outside the frame and respective eccentric sleeves rotatable in the frame about the axes engage the shafts at the bearing portions so that a spacing of the axes can be varied by rotating the sleeves in the frame. Respective pressure sleeves surround the shafts between the respective inner and outer bearing portions and are connected to a controller that pressurizes the sleeves and thereby bends the shafts in the frame between the inner and outer bearing portions.

Abstract: Hydraulic cylinders are provided in a housing so as to be opposed to roll chocks. Each of the hydraulic cylinders is constituted by movably fitting a thin plunger via a liner into a cylinder fixed to the housing, movably fitting a concave portion of the thin plunger over a center guide on the cylinder to form guide means, and connecting a liner for thrusting each of the roll chocks to a front end portion of the thin plunger.

Abstract: Hydraulic cylinders are provided in a housing so as to be opposed to work rolls and backup rolls. Before a front end portion of a rollable material is engaged between the work rolls, the working oil pressure of the hydraulic cylinders is set at a high pressure value to make a pressing force on roll chocks high. After the rollable material is completely engaged between the work rolls, the working oil pressure of the hydraulic cylinders is set at a low pressure value to make the pressing force on the roll chocks low.

Abstract: A screw down cylinder, an upper backup roll chock, and an upper work roll chock are pressed against an upper crosshead by hydraulic cylinders, and an upper roll cross mechanism is actuated, whereby the upper backup roll chock (upper backup roll), the upper work roll chock (upper work roll), and the screw down device (screw down cylinders) can be synchronously moved in the same direction via the upper crosshead.

Abstract: Work rolls opposed to each other have shafts rotatably supported by upper and lower work roll chocks of a housing, a screw down device for applying a predetermined pressure to the upper work roll is provided in an upper portion of the housing, screw mechanisms capable of thrusting the work roll chocks in a horizontal direction are provided on an entry side or a delivery side of the housing, hydraulic cylinder mechanisms capable of thrusting the work roll chocks in the horizontal direction are provided on the other side, and contraction portions are provided in hydraulic supply and discharge pipes of the hydraulic cylinder mechanisms.

Abstract: Disclosed is a roll driving system for a rolling mill. The roll driving system comprises hydraulic cylinders disposed in parallel between a rolling mill housing and a roll housing for supporting a backup roll and a work roll; load position sensors for detecting load positions of the hydraulic cylinders; means for executing a backward kinematic algorithm which calculates target load positions of the hydraulic cylinders when a target position instruction signal for degrees of freedom of roll movement is inputted from an upper control system, position controllers for controlling positions of the hydraulic cylinders in response to the target load positions inputted from the backward kinematic algorithm executing means; and means for executing a forward kinematic algorithm which calculates positions for the degrees of freedom of roll movement, based on the load positions detected by the load position sensors, and outputs resultant position signals to the upper control system.

Abstract: The invention intends to always maintain a distance between a hydrostatic pressure bearing and a roll even in a transient state before and after the start of rolling, thereby sufficiently and surely preventing damage of those components upon contact with each other, and to prevent a lowering of yield. In a plate rolling mill comprising upper and lower work rolls, and hydrostatic pressure bearings for supporting barrel portions of idler rolls in a non-contact manner with fluid pressure substantially along the horizontal direction, the idler rolls supporting the work rolls substantially along the horizontal direction, gap restraining rolls are provided to prevent gaps between the hydrostatic pressure bearings and the idler rolls from becoming lower than a predetermined value.

Abstract: The invention is directed to a roll change device for use in a four-high rolling mill stand, and in particular it is directed to retrofitting an existing four-high rolling mill stand with a roll change device comprising actuators that are fastened to opposing inboard exterior surfaces of the lower backup roll chocks in the mill stand and a pair of spaced apart lift-rails attached to the actuators by lift-rail hooks and positioned to engage the lower work roll chocks of the mill stand when the actuators are operated. The roll change device further includes a self-contained roll staging platform that is installed as a single unit within the mill floor adjacent the four-high rolling mill stand or removed as a single unit from its position within the mill floor.

Abstract: The present invention relates to an adjusting method for a roller section of a continuous casting machine which is provided with a section input side (6), a section output side (7) and a pair of roller carriers (1, 2) which each carry at least two rollers (3) extending over a supporting zone (4), with the roller carriers (1, 2) being mutually adjusted against one another by way of an adjusting unit arranged at the section input side (6) and at the section output side (7), with each adjusting unit being provided with two hydraulic cylinder units (8 to 11) arranged on either side of the supporting zone (4), characterized in that the hydraulic cylinder units (8 to 11) can be adjusted both in a position-controlled and pressure-controlled manner; the rollers (3) are placed in a position-controlled manner by the hydraulic cylinder units (8 to 11) against a metal billet (5) which is guided by the rollers (3); the hydraulic cylinder units (8 to 11) are changed over from position-controlled to pressure-controlled o

Abstract: A method to eliminate the play between the chock (13) and the support element (16) in four-high rolling stands (10), the rolling stand (10) comprising working rolls (12) and back-up rolls (11) assembled on respective chocks (13, 14), support blocks (16) to support the chocks (13, 14) and a stationary housing (15), the support blocks (16) to support the chocks (13, 14) and a stationary housing (15), the support blocks (16) being arranged between the uprights of the stationary housing (15) and the relative chocks (13, 14) and supporting means for the crossover lateral displacement of the rolls (11, 12), the stand (10) also comprising transmission means to transmit a thrust (19) acting on the upper chock (13) and contrasting the rolling thrust (20), the method providing to define the value of the inward flection of the uprights of the housing (25) according to the value of the rolling thrust (20), to define the entity of play (21) resulting, with the uprights (15) in this condition of flection, between the chock

Abstract: In a rolling mill in which hydraulic apparatus for controlling the roll balance or the shape of the rolled material are incorporated in movable frames provided separately from roll chocks mounted at each end of the rolls, reducing the roll inclination thereby making it possible to carry out stable rolling, and also reducing the roll vibrations, and making it possible to manufacture products with a high quality. Providing hydraulic apparatus 12 and 13 for controlling the roll balance and the shape of the rolled material inside the movable frames 10 and 11, hydraulic apparatus 16 and 17 that push and restrict the roll chocks 4 and 5 and the movable frames 10 and 11 in the direction of flow of the rolled material relative to the roller stand 3, and the hydraulic apparatus 18 and 19 that push and restrict the movable frames 10 and 11 in the up/down direction relative to the roller stand 3.

Abstract: A method and a machine for straightening sections by eliminating multi-axle deviations from the required section and from the required straightness using one or more straightening tools arranged, in series above and below the material to be straightened, on straightening axles which are parallel with one another. The adjustment of the straightening force and the adjustment of the horizontal inclination of the adjustable straightening axle are carried out hydraulically. The hydraulic system is configured so that a rapid change in position is possible either at the front and rear hydraulic cylinders or exclusively at the rear hydraulic cylinder in such a way that the straightening force and/or the horizontal inclination of the adjustable straightening axle can also be set during the straightening process.

Abstract: This invention relates to a roll mill comprising hydraulic clamping devices acting on at least one roll (2) with adjustable level, and devices for measuring the position of the adjustable roll, comprising, at each end (42) of the roll, a measuring rod (4) going through a tubular sleeve (5) with a certain clearance for insulating the pressure chamber (33). According to the invention, the clamping jacks (3) are single-action and the insulating sleeve (5) connected to each jack is extended by a sheath (53) going through the roll standard of the stand up to an external end on which rest devices for restoring the jack (3), in the direction opposite the clamping direction, while resting on the standard of the stand.

Abstract: Compression unit for oscillating roll, suitable to generate a compression thrust on a surface subject to translatory movements on a plane which does not contain the axis on which the compression thrust is made. The compression unit include an oscillating plunger body housed inside a stationary housing seating made in a piston element, the plunger body being conformed as a double element spherical cap, the first spherical cap element facing towards the piston element, being entirely contained inside the containing seating cradle and cooperating rotatably, with the inner spherical surface of the seating, the second spherical cap element being partly outside the containing cradle and facing towards the translatable surface and partly cooperating with the at least partly spherical surface of a movable element solid with the translatable surface. Between the first and second spherical cap elements there is placed an annular cylindrical connection and centering element including an elastic ring.

Abstract: A rolling stand having a stand casing, a first cylinder holding packing having a rolling cylinder rotatably mounted therein, a second cylinder holding packing having a rolling cylinder rotatably mounted therein with a rolling axis in parallel relation to the rolling axis of the rolling cylinder of the first cylinder holding packing, and four tie rods positioned at respective comers of the stand casing and each having a right-hand screw and a left-hand screw threadedly connected respectively to the cylinder holding packings so as to move at least one of the packings relative to the other. One of the cylinder holding packings includes an external bridge part coupled to the tie rods at either the right-hand screw or the left-hand screw, an internal part directly receiving the cylinder therein and coupled to the tie rods along an unthreaded portion of each of the tie rods, and a fluid dynamic cylinder connected to the external bridge part and to the internal part.

Abstract: A rolling mill stand for rolling wire and including a frame, at least one chock mounted in the frame and having a roll-side bearing and a thrust bearing, a roll support shaft supported in the roll-side bearing and the thrust bearing and projecting outwardly past the roll-side bearing so that a roll can be mounted on a projecting portion of the support shaft, and a hydraulic cylinder unit for adjusting the roll support shaft relative to a further roll support shaft supported in the frame in an adjusting direction and having a cylinder connected with the frame and a piston connected with the chock.

Abstract: A bearing control system for a roll with hydrostatic bearings which is mounted by its axle on a bearing block or other equivalent frame member by hydraulically loaded hydrostatic bearing elements. A principal bearing element acts in a principal loading direction and another bearing element is a backup bearing element which acts in a direction opposite to the principal loading direction. The bearing elements include bearing shoes positioned freely around the axle in order to support the axle so that the roll revolves freely in relation to the bearing block or other frame member. The control system feeds a hydraulic pressure medium to the hydrostatic bearing elements so that the roll is displaceable in the principal loading direction, e.g., in the direction of the nip plane, by displacing the axle via the bearing elements.

Abstract: A rolling cage to produce hot rolled bars, comprising at least one pair of rolling cylinders (12, 13) mounted on their respective stands (14, 15) in which a clearance (17) (processing gap) between said cylinders (12, 13) is adjusted by a system of screws (18) and lead screws (21), and which provides for a hydraulic pre-loading system of the same cylinders (12, 13) after adjusting the said clearance (17). According to the invention, the pre-loading system of said hydraulic cylinders (12, 13) comprises a multiple number of rods (27) crossing said stands (14, 15) and capable of a relative sliding motion. Each of said rods (27) is at one extremity (28) attached to a stand (14) while the opposite extremity is equipped with a piston (29) moving inside a hydraulic cylinder (30) firmly attached to the stand (15) opposite the former, so that said rods (27) also serve the function of opposing the rolling torque.

Abstract: A method and apparatus for controlling a deflection roll for compressing a web of material includes a shaft and a hollow roll disposed around the shaft. The hollow roll includes a working surface where the hollow roll is engageable with a hard roll along an entire length of the working surface. At least two bearing devices are disposed within the roll and are substantially aligned with the working surface of said roll. Each bearing device has a predetermined positive bearing clearance facilitating displacement of each outer contact surface relative to a respective inner contact surface of each bearing. The deflection roll further includes a mechanism for displacing the working surface of the roll with a fluid where the displacing mechanism is disposed external to the bearing devices.

Abstract: A combined work roll crossing, offsetting, bending and work roll axial shifting system for a rolling mill having a housing member on each side and at each end of each work roll, Mae West blocks mounted on the housing members, roll chocks surrounding the ends of the work rolls, a pusher member mounted on each of the Mae West blocks and movable into and out of contact with the corresponding roll chock, a first hydraulic piston/assembly mounted on each of the housing posts and connected to the corresponding pusher member to move the pusher member into contact with a corresponding chock and to effect crossing or offsetting of a corresponding work roll, a pair of roll bending second piston/cylinder assemblies mounted in each Mae West block such that the pistons contact the corresponding roll chocks to move the chocks toward or away from the corresponding work roll when the second cylinders are actuated, a third set of cylinder/piston assemblies mounted in the Mae West blocks for balancing the backup rolls, and a f

Abstract: An adjusting device for the rolls of a calender having a hydraulic drive for the fine setting of the rolls in their working position and a hydraulic drive for positioning the rolls in the working, maintenance and roll-change positions. The hydraulic drive for positioning the rolls includes hydraulic cylinders having double-acting pistons. An interlock device is provided, by which the piston rod can be interlocked positively in the working position of the rolls, after which the piston rod can be acted on by a prestressing force opposed to the adjusting direction in such a way that the interlock has no play.

Abstract: A coupling construction between an extended-nip roll including a non-revolving central axle supported by bearings which permit angular deflection of the non-revolving axle and a backup roll. Loading members are mounted on the non-revolving axle for pressing a loading shoe toward the backup roll. The extended-nip roll includes a flexible glide-belt mantle whereby a paper web or board web passes through the nip between the glide-belt mantle and the backup roll. The belt mantle revolves on support of separate bearings. The extended-nip roll and backup roll are interconnected from the bearing housings at the ends of the rolls by tie bolts which include a nut at one end which is threaded onto the threading at the end of the tie bolt. The tie bolt is associated with pre-tightening equipment at the other end of the tie bolt and is passed through bolt holes provided in the bearing housings to be coupled together. The other end of the tie bolt has the threading with which the pre-tightening equipment is coupled.

Abstract: An apparatus is described for adjusting the position of rolls (9) in stands with two working rolls for longitudinal rolling mills, in particular for rolling seamless tubes, with hydraulic capsule directly connected to the chock (8) of each roll bearing, wherein said capsule comprises a movable piston (2) and stationary parts (1, 3). At one end of said piston (2) there is provided a shaped axial element (12) for the engagement into a corresponding undercut groove (18) of said chock (8) to balance the own weights and take up the end plays along the capsule axis. Such an apparatus is preferably associated with a device for detecting the relative position between piston (2) and stationary parts (1, 3) by means of a transducer (7) in an out-of-center position with respect to the axis.

Abstract: A precision roll stand includes a roll housing absorbing the rolling forces. In the roll housing rolls constituting a roll pair with their roll chocks are mounted so as to be rotatable and mutually adjustable by an adjustment device which changes the axial distance between the pair of rolls. A drive housing including a roll drive is connectable with the roll housing while establishing a drive connection of the roll drive with the rolls and being removable from the same while undoing the drive connection. In order to produce rolled products exhibiting extremely high measuring accuracies and to be able to exchange the rolls quickly and without difficulty, the roll housing has a frame which is open in the direction of adjustment of the rolls and contains and guides the chocks of the rolls. A crosshead for closing the frame carries the adjustment device designed as a pressure medium cylinder and is rigidly connectable with the frame. The drive housing is supported on the crosshead.

Abstract: A roll stand with backing rolls and work rolls for rolling sheets and strips, in which at least the upper and lower work rolls mounted in chucks inside of housing windows formed between housing columns of the roll housing can be moved out of their shared vertical plane horizontally in opposite directions by movement drives effectively associated with the roll chucks into positions wherein the vertical planes that pass through the axis of roll of the upper work roll and of the lower work roll intersect. This is achieved by the fact that on the inner and outer sides (which are opposite to each other and run parallel to the direction of roll) of each housing column, a movement and a swivel bearing are arranged for one of two substantially horizontal beams. The beams are parallel, connected to each other and extend on both sides past the housing columns on one side, the beams extend into the housing window and, on the side facing away from the housing window, out of the roll housing.

Abstract: A sizing stand (10) for rolling hot-rolled bars (17) comprises at least one pair of rolling rolls (13) carried by chocks (12) mounted on a support frame (11). Said stand also comprises power means (14) able to compression-preload the rolling system with a load greater than the maximum working load.

Abstract: A roller bearing apparatus for supporting a compensation roller that is disposed adjacent to a roller of a roller stack. The compensation roller has an axis. The roller stack has an axis. A plane is defined by the compensation roller axis and the roller stack roller axis. A bearing support is disposed in a frame. The bearing support receives a ball joint. The bearing support is movable relative to the frame to act as a lever. The bearing support pivots about a pivot point. A pressure transducer is disposed between the frame and the bearing support. The pressure transducer acts in a direction that is disposed exterior to the ball joint. The pressure transducer extends on both sides of the plane and acts perpendicularly to the plane.

Abstract: It is an object of the present invention to provide a supporting method, equipment, and controlling method for the roll-former stand by which the height and inclined angle of the cluster roll comprising subsequentially deposited plurality of side rolls likely as a roll former as a pipe mill can be arbitrarily set, and the interdistance between said rolls can be reduced. The basic structure consists of the following procedures; namely, (1) a supporting a pair of cluster platforms, on which a common bed is mounted, by a link being formed by jacks; a plurality of side rolls is supported by a roll bracket and deposited on said common bed, (2) fixing both end portions of the link on the platform or a bed plane surface to form an arbitrary triangle, and (3) measuring the length of the link by a linear encoder which is provided along said links. The measured data is converted to the Cartesian coordinates by the computer.

Abstract: A multi-high rolling mill is disclosed which includes an upper work roll backed by an intermediate roll and a backup roll and a lower work roll backed up by a single backup roll. Control benders are provided on each of the intermediate roll and the upper and lower work rolls. In order to optimize the control of the rolling operation for skinpass rolling and the like, the control benders for the upper work roll and the intermediate backup roll are controlled so as to effect a control of the crown sheet over the entire width of the material being rolled, while the control bender for the lower work roll controls the sheet crown of the rolled material at the lateral side end portions, resulting in a composite control substantially improving the sheet quality and preventing edge wrinkles in the material being rolled. In the disclosed embodiments, the intermediate roll has a larger drum length than a predetermined maximum sheet width of rolled material to be rolled by the work roll.

Abstract: A bending block for bending the rolls of cluster roll stands is rigidly connected on both sides of the chocks of the pair of rolls to be bent to the windowed housing posts of the roll housing or to units for the horizontal stabilization of the rolls. The bending block has bending jaws which are slidably guided in both bending directions and are driven by means of piston-cylinder units. The chocks or the units for horizontal stabilization have pressure receiving surfaces and the bending jaws have pressure contact surfaces which act on the pressure receiving surfaces in one or the other bending direction. Each bending jaw includes a pair of partial bending jaws which can be moved independently of each other and in opposite directions, wherein the pressure contact surfaces of each partial bending jaw corresponds to one or the other bending direction.

Abstract: A rolling mill for flat products characterized by a roll assembly including a pair of work-rolls confronted reciprocally, and support-rolls divided by not less than three partitions in a roll axiswise direction which are provided, independently, with load detector equipment; crown and flatness of the products can be estimated precisely and regulated without delay using the rolling mill.

Abstract: A two-part housing assembly for a cluster mill. The housing assembly has substantially the same size, form and structure as a monobloc housing, but is divided along a horizontal plane located at or close to its horizontal center line into upper and lower mill housings each provided with a roll cavity and a roll cluster therein. The gap between the work rolls of the roll clusters is adjusted by symmetrical equal and opposite movement of the upper and lower mill housings achieved by four identical screws, one located in each corner of the mill housing assembly. Each screw has two threaded portions of opposite hand, one threaded portion engaging a threaded nut of opposite hand non-rotatively mounted in a recess in the upper mill housing and the other threaded screw portion engaging a threaded nut of appropriate hand non-rotatively mounted in a recess in the lower mill housing. Each screw supports the upper and lower mill housings.

Abstract: A frame structure for calenders in a paper machine in which two vertical legs are horizontally connected to one another. The calender rolls are mounted, one above the other, between the vertical legs so that the upper roller is fixed vertically while the lower roller is able to slide vertically. A loading cylinder is used to move the lower cylinder vertically within the frame. The loading cylinder is mounted on a beam structure which is attached at its ends to the inner walls of the frame legs. The beam structure is shaped so that it is able to flex or pivot relative to the frame's legs so that only vertical forces are transmitted to the frame and transmission of bending moments from the beam structure to the frame structure and the foundation is substantially eliminated.

Abstract: A device for adjusting a brush roll relative to a work roll in roll stand, particularly a roll stand for hot-rolling of aluminum includes pivotable supports mounted on both sides of the brush roll. The brush roll is rotatable in a direction opposite the direction of rotation of the work roll. The brush roll is displaceable in translatory movements parallel to the work roll. The pivot bearing of each brush roll support is arranged on a work roll chock, wherein the support includes a pivoting lever which is located between a controllable actuating element and a restoring support element. The actuating element is mounted in the balancing block or bending block of the roll stand and the support element is mounted in the chock.

Abstract: The invention concerns an adjustable-crown roll having a stationary roll axle which is supported on the machine frame by means of articulated bearings, and a roll mantle which is arranged to revolve on the axle. Hydrostatic loading members or an equivalent pressure fluid chamber or series of chambers are arranged in the space between the axle and the roll mantle. By means of the loading members or equivalent, the profile of a nip formed with a counter-roll of the roll is regulated. A support bushing arranged concentrically with the roll mantle is attached to one end of the roll mantle and revolves along with the roll mantle. A bearing is installed on the support bushing. The bearing receives axial forces from the roll mantle and transfers the same to the machine frame through the non-revolving bearing block or housing of the bearing. The bearing is arranged, in the axial direction, outside the roll, whereby the roll is suitable for use as a hot roll.

Abstract: A roll assembly comprising a rotatable roll (1 in FIG. 2) and a second roll (2 in FIG. 2) cooperating therewith, in which a pressing element (17) to effect displacement between the rolls along a pressure plane of the roll assembly is located in one of the rolls (1,2) and in which both rolls are supported at either end by respective support members (5,6). Prior to operation of the roll assembly, dumbbell-like shaped connecting parts (7) installed in corresponding cut-outs (9) in the support members (5,6) are tensioned and thereby securely form-locked by actuating the pressing element (17). Locking action is released by subsequent deactivation of the pressing element (17) after which the connecting parts (7) can be withdrawn. Two principal advantages of this arrangement, are the compacter construction, enabled by the fact that the frame no longer bears the pressing forces of the roll assembly, and the ease and speed with which components such as rolls, roll jackets or felt belts can be changed.

Abstract: A rolling mill in which an upper housing is guided upward and downward along columns, a fluid chamber is formed between the upper end section of each column and a column insertion hole of the upper housing; a fixed piston fixedly mounted on the column is fitted in the fluid chamber; a roll gap rapid widening piston is fixedly installed on the upper end of the column, and on this piston is vertically movably fitted a hydraulic cylinder; the hydraulic cylinder is fixedly mounted in the upper housing; pressure fluid is constantly supplied to an upper fluid chamber on the piston; a fluid chamber is provided in the column insertion hole of the upper housing, and a column clamping sleeve is fitted therein; and the pressure fluid is fed into, and discharged out of, the fluid chamber to move the upper housing upward and downward.

Abstract: The method and apparatus are provided for controlling the gap between the rolls by comparing the initial gap setting and the actual gap value and providing the quantity of hydraulic fluid for the hydraulic rolling reduction cylinder in response to the output of the comparison.The method consists of setting the value for the gap between the rolls, measuring the actual gap, comparing the gap setting value and the actual gap value, controlling the quantity of hydraulic fluid to be supplied to the rolling reduction cylinder in response to any deviation between the two values, and thereby controlling the rolling reduction for the cylinder.

Abstract: The axes of a first press roll (1) and of a second press roll (3) lie in a press plane (E). Each of the press rolls has a journal pin (2) and (4) respectively. The first press roll is supported in a first bearing pedestal (5). The second press roll rests in a second bearing pedestal (6) which is coupled to the first bearing pedestal (5) by utilizing flexurally soft tension bars (7, 8). In the unloaded condition of the roll press, the second bearing pedestal (6) rests on the first bearing pedestal (5). In the loaded condition, play (p) is established between the bearing pedestals (5 and 6) so that the bearing pedestals (5 and 6) are displaceable axially relative to each other.

Abstract: A high pressure roller press for interparticle crushing and particularly a bearing support for one of the rolls having force means for the bearing housings urging the roll to obtain high pressure capable of interparticle crushing in the nip and a support bearing for one end of the roll having radial arms extending above and below the nip and guided in a slide permitting movement toward or away from the nip with a stepped bearing at one end of the roll with one bearing being a thrust bearing preventing axial movement and the other end of the roll being supported in a bearing permitting axial movement of the roll end. A rubber pad is located between each bearing and a force applying piston to allow tilting of the bearing and a frusto-conical link permits the pad to be larger than the piston.

Abstract: The apparatus for the counterbalancing and vertical bending of the work rolls of a four-high rolling mill stand (1) comprises respectively two dual-acting hydraulic adjusting cylinders (13) installed in the bottom work roll chocks (4) symmetrically to the roll axis plane (12--12). The adjusting piston (14) of the adjusting cylinders (13) serves for moving the piston rod (15) out of the bottom chock (4) and for moving the free end of the piston rod (15) into the top work roll chock (15) during rolling operation, and for moving the piston rod (15) into the bottom chock (4) for the separate dismounting of the work rolls (6, 7). During rolling operation, the extended piston rod (15) is connected, by means of a coupling device (16), with a shaft (22) supported in articulated fashion in the top chock (5).

Abstract: A five-high rolling mill is disclosed which includes an upper work roll backed by an intermediate roll and a backup roll and a lower work roll backed up by a single backup roll. Control benders are provided on each of the intermediate roll and the upper and lower work rolls. In order to optimize the control of the rolling operation for skinpass rolling and the like, the control benders for the upper work roll and the intermediate backup roll are controlled so as to effect a control of the crown sheet over the entire width of the material being rolled, while the control bender for the lower work roll controls the sheet crown of the rolled material at the lateral side end portions, resulting in a composite control substantially improving the sheet quality and preventing edge wrinkles in the material being rolled. In the disclosure embodiments, the intermediate roll has a larger drum length than a predetermined maximum sheet width of rolled material to be rolled by the work roll.

Abstract: A measuring element which senses the running of the solid of rotation is connected to the actual value input of a controller whose output signal is connected to a control element which acts upon a bearing which is adjustable perpendicularly to the axis.

Abstract: A rolling mill stand with work rolls which are supported in chocks, wherein the upper work roll can be raised from the lower work roll by balancing cylinders and wherein the upper work roll can be supported for a roll change on the balancing cylinders above the lower work roll in order to avoid contact of the bodies of the rolls. The chocks of one of the rolls include pivotable support levers which in a basic position thereof extend around sides of opposite chocks. The support levers can be pivoted into an effective position in which the free ends of the support levers rest on the bottom of grooves provided in the opposite chocks.

Abstract: A roller leveller for one-pass levelling of high strength metal plate comprises a main frame, top beams mounted on the main frame, three upper roll frames mounted on the top beams, a lower roll frame mounted on the main frame, three sets of upper and lower driven work rolls mounted, respectively, on the upper and lower roll frames, backup rolls backing up each work roll, four screwdown assemblies associated with each set of upper work rolls whereby they are movable as a set vertically and tiltable in the direction of a pass line of plate passed through the leveller; and control means separately to control the gap between the upper and lower work rolls in each set.

Abstract: An adjusting arrangement for the roll gap or rolling force in rolling mill stands. The arrangement includes two hydraulic adjusting cylinders which act from both sides on a work roll to be adjusted. The adjusting cylinders each have two or more piston surfaces to which pressure medium can be applied independently of each other, either individually, in any combination, or to all piston surfaces. This makes it possible to adjust the rolling force within the respective rolling force range in such a way that percentage variations of the rolling force are minimized and, consequently, different roughnesses and differences in wall thicknesses can be almost completely eliminated.

Abstract: The invention relates to a cluster mill having four columns 5, 6 connecting the lower part 1 and the upper part 2 for the sets of rolls 3, 4. Associated with each column 5, 6 is a lifting device 11, 12 enabling the lower part 1 and the upper part 2 to be moved wide apart. A hydraulic roll screw-down system independent thereof has an adjustable piston 16 which can be attached to the column 5, 6 and between which and the bottom of its cylinder casing 17 borne by the upper part 2 the necessary roll force can be built up. Due to the adjustable piston 16, for any required roll gap the cylinder space in which the pressure for the roll force is built up has a low height.