361results about "Rolling mill drives" patented technology

The invention discloses a gear shifting gearbox and an asynchronous rolling mill, and relates to the technical field of rolling equipment. The transmission mechanism comprises a main transmission shaft, a first output shaft and a second output shaft, the main transmission shaft, the first output shaft and the second output shaft can be rotationally installed in the box body along the axes of the main transmission shaft, the first output shaft and the second output shaft are driven by the main transmission shaft to rotate, and the rotation directions of the first output shaft and the second output shaft are opposite; the gear shifting mechanism comprises a wheel disc and a plurality of first gear sets, the wheel disc can rotate around the axis of the wheel disc to be connected to the main transmission shaft, the first gear sets are arranged on one end face in the wheel disc, all the first gear sets are in transmission connection with the main transmission shaft, and different first gear sets are switched through rotation of the wheel disc to be in transmission connection with the first output shaft; the main transmission shaft is in transmission connection with the first output shaft through one of the multiple first gear sets, the transmission ratios of the first gear sets are different, and multiple rotation speed ratios exist between the first output shaft and the second output shaft.

The utility model provides a rolling mill connecting shaft balancing device and a rolling mill, and relates to the technical field of rolling mills, the rolling mill connecting shaft balancing device comprises a base, an upper balancing device and a lower balancing device, the upper balancing device comprises an upper lever structure, an upper hydraulic cylinder, an upper frame and an upper bearing seat; one end of the upper lever structure is rotationally connected with the movable end of an upper hydraulic cylinder arranged on the base, the other end of the upper lever structure is rotationally connected with the base, one end of the upper frame is rotationally connected with the middle of the upper lever structure, and the other end of the upper frame is provided with an upper bearing seat. The lower balancing device comprises a lower lever structure, a lower hydraulic cylinder, a lower frame and a lower bearing seat, one end of the lower lever structure is rotationally connected with the movable end of the lower hydraulic cylinder arranged on the base, the other end of the lower lever structure is rotationally connected with the base, and one end of the lower frame is rotationally connected with the middle of the lower lever structure; and a lower bearing seat is arranged at the other end of the lower frame. The running stability of the rolling mill can be improved.

The invention belongs to the technical field of rolling, and particularly relates to an anti-decarburization and anti-brittle failure controlled cooling process for a high-silicon-chromium alloy tool steel wire rod. Aiming at the dilemma that the hot-rolled wire rod which contains more than 2.0% of Si, more than 1.1% of Cr, Mo, V and other alloy elements not only meets the decarburization requirement of a product, but also does not have brittle failure of the wire rod, the method comprises the following steps: firstly, determining the cover entering temperature of the hot-rolled wire rod, the cooling speed of the wire rod before the hot-rolled wire rod enters the cover and other key process parameters; and then the method is realized by adjusting the speed of a roller way, the number of opened heat preservation covers after spinning, a fan Jinling device, the air volume of a fan, the spinning temperature and the like, so that the hot rolling structure of the wire rod is a pearlite structure which is not easy to brittle, and meanwhile, the requirement that the decarburization of a product does not exceed 0.55 D (D is the diameter of the wire rod) is met.

The embodiment of the invention discloses a rolling method for effectively relieving anisotropic titanium alloy TC4 thin strip coils and the titanium alloy TC4 thin strip coils, and relates to the technical field of alloy rolling. Comprising the steps that a leading tape is welded to the TC4 titanium alloy coiled material, the TC4 titanium alloy coiled material is placed on an uncoiling machine, and tension is formed on the TC4 titanium alloy coiled material through a tension roller; warm rolling is conducted on the TC4 titanium alloy coiled material at the temperature of 650-750 DEG C, the rolling speed is 500-800 mm / s, the single-pass reduction rate is 10-20%, reciprocating rolling is conducted under the condition that the asynchronous ratio of an upper roller to a lower roller is 1-1.3, and heat preservation is conducted on the TC4 titanium alloy coiled material after each pass of rolling is completed in a furnace for 10-25 min; and the TC4 titanium alloy coiled material rolled to the required thickness is subjected to annealing treatment under the argon protection condition, the annealing treatment temperature ranges from 850 DEG C to 950 DEG C, and the heat preservation time ranges from 20 min to 40 min. The rolling method is high in production efficiency, the difference between the tensile strength of the obtained titanium alloy plate in the direction parallel to the rolling direction and the tensile strength of the obtained titanium alloy plate in the direction perpendicular to the rolling direction is small, and anisotropy of the titanium alloy plate is greatly relieved.

To provide a stand that enables both of a position in a rolling machine and a configuration for adjustment to be selected more flexibly at the same time with designing for downsizing the rolling machine.SOLUTION: A stand 1 rolls a metal rod, a wire, and a pipe along a rolling shaft. The stand includes: a stand housing 10 whose outside includes at least six side surfaces 14.1-14.6 having equal lengths which are arranged rotationally symmetrically with the rolling shaft as a center, when viewed along the rolling shaft, where the two side surfaces respectively form a pair of side surfaces arranged in parallel to each other; and three rollers 20.1-20.3 each arranged on one roller shaft, and surrounding the rolling shaft in a star shape to jointly form a caliber 21. The three rollers are loaded by an eccentric bushing, in a bearing hole of the stand housing, by a method in which an interval in a radial direction of the rollers from the rolling shaft can be adjusted.SELECTED DRAWING: Figure 1A

A stretch reducer and / or calibrating rolling mill for rod-shaped bodies, in particular tubular bodies, in particular hollow bodies, said rolling mill comprising a plurality of rolling stands each comprising a plurality of rolling rollers mutually arranged so as to define a passage for said rod-shaped bodies, wherein said rolling stands are arranged in sequence along a rolling direction so that the respective passages are substantially aligned to define a rolling path substantially parallel to said rolling direction, wherein each of at least two of said rolling stands comprises three rolling rollers.

The present invention relates to a method (100) and a device (10) for determining a target value (S) for a selected production parameter (P) of a rolling mill (200) with at least one rolling stand group (230) for rolling a metal product (12) into a metal strip (14), as well as a rolling mill (200) with such a device (10), a computer program product, and a machine-learned model (40). A value (W) of a material parameter (M) for a predetermined reference material is provided (S1). A correction factor (c2) for the material parameter (M) is determined by a machine-learned model (40) based on a recurrent neural network (42) using previously known production parameters (P*) in the metal strip production process (S3).The target value (S) for the production parameter (P) of the rolling mill (200) can then be determined on the basis of a physical production parameter model (52) which incorporates the material parameter value (W) adjusted with the correction factor (c2) and target specifications (Z) for the rolling of the metal strip (14) (S4).

The invention relates to the technical field of rolling of hot-rolled patterned rolled plates, and discloses rolling equipment for hot-rolled patterned rolled plates and a rolling method thereof.The rolling equipment comprises a first roller type conveying belt, a displacement mechanism is fixedly installed on the lower side of the first roller type conveying belt, and three second roller type conveying belts are arranged on the right side of the first roller type conveying belt; a rough rolling station is arranged on the side, close to the first roller type conveying belt, of the second roller type conveying belt, a finish rolling station is arranged at the end, away from the first roller type conveying belt, of the second roller type conveying belt, and a third roller type conveying belt is arranged at the end, away from the second roller type conveying belt, of the finish rolling station. The first roller type conveying belt and the second roller type conveying belt are each provided with a protective cover, and each protective cover is provided with an inner layer and an outer layer. And a gas module is mounted on the protective cover. The tapping temperature of the steel billet from the heating furnace can be detected, so that the thickness of a finished product to be processed can be indirectly known, and a rough rolling production line and a finish rolling production line for processing the corresponding finished product thickness can be automatically matched.

The invention discloses a high-performance wide precision zirconium alloy strip as well as a preparation method and application thereof. By strictly controlling the content of key elements in the zirconium alloy raw material and the structure before cold rolling, the deformation resistance is reduced, and the processing plasticity is improved; the material, the roll shape curve and the surface quality of a cold rolling working roll suitable for cold rolling of the zirconium alloy strip are strictly controlled, the rolling stability is improved, the strip thickness-rolling parameter matching relation is established in stages, the pass deformation is improved, and work hardening is reduced; small-angle oblique welding seam tailor-welding is adopted, so that welding seams sequentially pass through a rolling deformation area, the average unit pressure of the welding seams is reduced, welding seam cracking is reduced, tailor-welding coiling cold rolling stable control over the wide precision zirconium alloy strip is achieved, and machining of the precision strip with the width larger than or equal to 500 mm and the thickness smaller than or equal to 0.2 mm can be achieved.

The invention relates to a preparation method for rapidly improving the glossiness of a mirror-finished aluminum alloy strip. The aluminum alloy strip used in the method is subjected to a cold-rolling homogenization treatment. The method comprises the following steps: S1: before the cold-rolling mirror-finishing pass of the aluminum alloy strip, the roughness of an entrance color-adjusting roller is set to 0.01-0.30 μm; S2: 2) during the cold-rolling mirror-finishing pass of the aluminum alloy strip, the lower tangent position of an upper roller of the entrance color-adjusting roller is 0-10 mm lower than the roller surface height of a lower roller, and the linear speed of the entrance color-adjusting roller is 10-100 m / min greater than the linear speed of a working roller of a rolling mill; S3: during the cold-rolling mirror-finishing pass of the aluminum alloy strip, the speed of the working roller of the rolling mill is ≤200 m / min. By optimizing the surface roughness and the pressing depth of the cold-rolling entrance color-adjusting roller, the mirror-finished aluminum alloy strip is rapidly prepared and a higher surface glossiness is obtained, thereby increasing the material preparation production efficiency and achieving a good mirror-finished effect on the finished product.

The utility model relates to a sizing horizontal roller frame which comprises a machine frame and two rollers. The two horizontally-arranged rollers are connected with lifting pieces used for driving the rollers to move in the height direction of the rack, the two lifting pieces work to adjust the distance between the rollers, and steel pipes of different specifications penetrate through the circular channels of different diameters to be pressed. Steel pipes of different specifications are arranged in the circular channels of different diameters in a penetrating mode to be pressed, and each circular channel is designed for the steel pipe of the specific specification, so that it is guaranteed that the steel pipe can obtain the accurate size and shape in the pressing process. In addition, the semicircular grooves of the two rollers form a plurality of circular channels which have different diameters and are used for the steel pipes to pass through along the axial direction of the semicircular grooves, so that the structure can flexibly meet the production requirements of the steel pipes with different specifications.

The invention belongs to the technical field of rolling, and discloses a Ni / Al nano multilayer film electroplasticity and current-assisted ply rolling forming method. The Ni / Al multilayer film is an energetic material and is used as a brazing heat source and a welding flux. According to the method, millimeter-level Ni foil and Al foil serve as raw materials, the thickness ratio of all layers is determined according to the maximum self-propagating heat release amount, a six-roller precision rolling mill is used for conducting multi-pass electroplastic ply rolling under pulse current, the pass deformation is 60%, and electric pulse annealing is conducted after rolling (the temperature is lower than a reaction critical value), and the Ni / Al nanometer multilayer brazing thin film with the total thickness being 50 micrometers and composed of thousands of layers of nanometer thin films is prepared. The method overcomes the problems of low production efficiency, high cost, narrow application range and the like in the prior art, and compared with a magnetron sputtering method, the method is low in manufacturing cost, short in period, large in area and good in mechanical property; compared with an accumulative ply rolling technology, interface recombination is excellent, nickel layer breakage is light, and heat release is high; and the material is low in deformation resistance and good in plasticity, multi-layer film ply rolling forming property integrated forming is achieved, and industrial application is facilitated.

The invention relates to the technical field of roller rotating speed monitoring, in particular to a roller rotating speed monitoring device and monitoring method based on a reflective mark, and the device comprises the reflective mark, an intelligent light source regulation and control system and a light spot visual acquisition and processing unit. The reflective mark is of a three-layer composite structure, the intelligent light source regulation and control system can dynamically adjust the modulation frequency, and the light spot visual acquisition and processing unit acquires and processes light spot images through a high-speed industrial camera and an image processor; according to the method, light source intelligent modulation and synchronization are carried out by arranging reflective marks, the real-time rotating speed is calculated by using a multi-dimensional information fusion algorithm, and an alarm mechanism is set; the method is high in anti-interference capability, high in measurement precision, capable of adapting to different working conditions, low in cost and easy to implement, and the problems of inaccurate monitoring, high cost, poor adaptability and the like in the prior art are solved.

The invention discloses a tension-adjustable continuous casting billet rolling device for web cracking prevention, and relates to the technical field of continuous casting billet rolling. The continuous casting billet rolling device comprises a bottom plate, a pair of fixing supports are fixedly arranged on the bottom plate, a fixing roll shaft is inserted between the pair of fixing supports, and the fixing roll shaft is sleeved with a first rolling roller. Rectangular sliding blocks are arranged on the upper middle portion of the fixing support in a sliding fit mode, a driven roller shaft is inserted between the pair of rectangular sliding blocks, the driven roller shaft is sleeved with a second rolling roller, and the fixing roller shaft is connected with the driven roller shaft through a transmission mechanism. A pair of fixing blocks is fixedly arranged on the bottom plate, rectangular sliding rods are inserted into the fixing blocks in a sliding mode, first L-shaped connecting plates are installed at the rear ends of the rectangular sliding rods, second L-shaped connecting plates are installed in the middles of the rectangular sliding rods, and the first L-shaped connecting plates and the second L-shaped connecting plates are connected through limiting mechanisms. The problems of rolling adaptability of blanks with different thicknesses and positioning accuracy of blanks with different widths can be effectively solved, the web is prevented from cracking, and the rolling quality and the equipment universality are improved.

The utility model provides a rolling mill cardan shaft fixing device which comprises two clamping assemblies, and a clamping position for clamping a rolling mill cardan shaft is formed between clamping plates of the two clamping assemblies. The clamping assembly comprises a mounting seat, a clamping assembly and a clamping assembly, wherein the mounting seat is fixedly connected with the rolling mill frame; the sliding plate is movably connected to the mounting seat; the clamping plate is connected with the sliding plate; and the driving assembly is used for driving the sliding plate to move. The fixing device has the advantages that compared with a traditional frame type fixing device, the two fixing devices are more convenient to maintain, the clamping assembly on one side can be independently maintained, and the fixing device is simpler in structure, not prone to deformation and lower in failure rate.

Control system for cold rolling mills to improve sheet metal thickness uniformity. Sensors monitor the state of the cold rolling mill by measuring (i) roll eccentricity, (ii) roll slips during mill operation, (iii) mill disturbances from roll speed or roll force manifestations, and (iv) unknown disturbances referred to as process noise. The controller analyzes data from sensors to compensate. Data collected during the mill operation by the sensors are delayed in reaching the controller. This communication delay is accounted for by using a filter. Since an objective of the controller software is dynamic identification of eccentricity of the back up rolls, which is non-linear by nature, an Extended Kalman Filter may be used.

The invention relates to an apparatus (1) and to a method for producing flat-rolled products from metal slabs, preferably thick slabs having a thickness of at least 140 mm, wherein the apparatus (1) comprises: at least one casting machine (10) which is designed to cast a strand from a metal, preferably steel; a transport device (30) which is designed to transport the strand in a transport direction along a transport line (T); a separating device (14) which is arranged downstream of the casting machine (10) in the transport line (T) and is designed to separate the strand into individual slabs; a rolling device (50) which is arranged downstream of the separating device (14) in the transport line (T) and is designed to roll each slab into a flat-rolled product; a temperature setting system (20) comprising an induction heating device (22) which is arranged between the separating device (14) and the rolling device (50) and is designed to heat the slabs to a hot-rolling temperature; and a control device (100) which is in communication with the induction heating device (22) and is designed to actuate the induction heating device (22) such that each slab is heated in a non-uniform manner along its longitudinal extent.

The present invention relates to the technical field of copper rod processing, and in particular to a method for controlling the rolling of an ultra-high-pressure copper rod, comprising the following steps: rolling the copper rod in a plurality of passes using a three-dimensional collaborative rolling mode, with the rolling direction of each pass forming a specified angle with the rolling direction of the previous pass; configuring a rolling roller with an adaptive surface correction module to compensate for a shape error of the copper rod caused by switching the rolling direction; by adopting the three-dimensional collaborative rolling mode, the uniformity of the internal grain structure of the copper rod is effectively improved, and the mechanical properties and electrical conductivity of the material are enhanced; the adaptive surface correction module configured with the rolling roller can dynamically compensate for the shape error caused by switching the rolling direction, and significantly improve the shape accuracy and surface quality of the copper rod; and by real-time detecting the deformation after each rolling pass and dynamically adjusting the rolling gap, the problem of uneven deformation is avoided, thereby ensuring the consistency of the product.

A reversing roughing mill for rough rolling an aluminium or aluminium alloy product fed along a feed plane, the roughing mill comprising: a reversing horizontal roughing stand 1; a first cooling device 10 arranged upstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with a cooling liquid; and a second cooling device 15 arranged downstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with the cooling liquid.

The utility model relates to a high-speed rolling mill, in particular to a transmission device of the high-speed rolling mill. A four-shaft balance transmission device of a high-speed rolling mill comprises a power input shaft and a shaft with a crank gear, a transmission gear is arranged on the power input shaft, and a balancing weight and a connecting rod for driving a machine frame are arranged on the crank gear. The two sides of a shaft where the crank gear is located are each provided with a transmission shaft, each transmission shaft is provided with a gear with a small balance block, the gear on one side is located between the power input shaft gear and the crank gear shaft and meshed with the power input shaft gear and the crank gear shaft, and the transmission shaft on the other side is provided with a gear which is meshed with the crank gear and provided with a small balance block. The two gears with small counterbalances are matched with a crank gear in diameter. Compared with existing equipment, the rolling efficiency is improved, and the service life of the rolling mill is prolonged.

This disclosure relates to a rolling mill, specifically a cold rolling mill, comprising: - cylinders or sets of rollers including at least one pair of working cylinders capable of defining the air gap of a strip to be rolled, - at least one spray bar (3a, 3b) for spraying a lubricating and / or cooling fluid, located near the plane of the strip to be rolled, - a stand (2) within which said cylinders are arranged, - at least one device for adjusting the inclination of said at least one spray bar including an actuator, such as a hydraulic cylinder configured to change the inclination of the spray bar about the pivot axis. According to this disclosure, said actuator of the inclination adjustment device is arranged on the second side (C2) of the stand, opposite the first side (C1) of the maintenance window.

The invention relates to the technical field of round wood rolling, and discloses a speed reduction transmission distribution system and method of a rod and wire three-roller mill. The system comprises an integrated speed reduction distribution box, two 30-degree bevel transmission boxes and five couplings, in the integrated speed reduction distribution box, single-path input power is synchronously distributed into three paths of output through a gear set, the included angle between every two adjacent output shafts is 30 degrees, and after the directions of the bevel transmission boxes are converted, the included angle between the three paths of output axes is 120 degrees, and the three paths of output axes correspond to an input shaft of a three-high rod and wire mill rack. A traditional overall module type and external reduction gearbox structure is abandoned, transmission structure simplification, cost reduction and convenient maintenance are achieved through collaborative optimization of parts, meanwhile, transmission efficiency and stability are improved, the problems that in the prior art, the structure is complex, and manufacturing and assembling difficulty is large are solved, and the power transmission device is suitable for power transmission scenes of various rod and wire three-roller mills.

The utility model discloses an off-line short-stress finish rolling mill roll gap measurement and roll groove pull welding auxiliary device which comprises a frame body, a first driving assembly used for driving an upper roll of a short-stress finish rolling mill to rotate in the forward direction, a second driving assembly used for driving a lower roll of the short-stress finish rolling mill to rotate in the reverse direction and a controller. The first driving assembly and the second driving assembly are both fixedly connected with the frame body. And the controller is used for controlling the first driving assembly and the second driving assembly to simultaneously drive an upper roller and a lower roller of the short-stress finish rolling mill to rotate oppositely so as to measure a roller gap, or independently controlling the first driving assembly to drive the upper roller of the short-stress finish rolling mill to rotate so as to carry out rolling groove pull welding. The device can assist in measuring the roll gap and assisting in drawing and welding the rolling groove in the off-line state of the short-stress finish rolling mill, the stop time of a steel rolling production line can be shortened, the production efficiency is improved, and safety accidents are effectively prevented.

To provide a controller for cold rolling mills to improve sheet metal thickness uniformity, and a method of programming the controller.SOLUTION: Sensors monitor the state of the cold rolling mill by measuring (i) roll eccentricity, (ii) roll slips during mill operation, (iii) mill disturbances from roll speed or roll force manifestations, and (iv) unknown disturbances referred to as process noise. The controller analyzes data from sensors to compensate. Data collected during the mill operation by the sensors are delayed in reaching the controller. This communication delay is takin into account by using a filter. Since an objective of controller software is dynamic identification of eccentricity of the back-up rolls, which is non-linear by nature, an extended Kalman filter may be used.SELECTED DRAWING: Figure 3

This invention discloses a high-speed metal wire rod finishing mill, relating to the technical field of metal wire rod processing. It includes a support frame, on which a motor is mounted. The motor's output end is connected to a rotating shaft, and a drive roller is mounted on the outer side of the shaft. The drive rollers are symmetrically arranged on the support frame. A lifting assembly is mounted on the support frame, and a cooling assembly is located below the lifting assembly. The cooling assembly includes nozzles that perform cooling through deflection and sweeping. A straightening assembly is mounted on the support frame, including straightening rollers. The straightening rollers' lifting and lowering adapts to the straightening requirements of different wire rod specifications. In this high-speed metal wire rod finishing mill, two sets of drive rollers are meshed and driven by gear assemblies on the outer side of the rotating shaft, ensuring consistent rotation speed and improving overall rolling accuracy. The driven rollers lift and lower synchronously, reducing the problem of reduced accuracy caused by multiple drives. The nozzles spray coolant for cooling, further optimizing rolling accuracy.

The invention relates to the technical field of aero-engine blade manufacturing, and particularly discloses a device for controlling a blade rolling chuck to rotate and a rotating method thereof. The device is composed of a chuck rotating device and a guide control device. And the chuck rotating device realizes power transmission through a chuck rotating shaft, an angular plate, a guide rod, a turntable, a core shaft and a roller. The guide control device comprises a fixed plate, a screw, a fixed guide plate, a movable guide plate and the like, and is connected with the machine tool through the fixed plate. The core rotating method is as follows: in the rolling process of the blade, a roller rolls in a groove formed by a fixed guide plate and a movable guide plate, and the rotation of a chuck rotating shaft is controlled through mechanical linkage; the screw is rotated to drive the movable guide plate support to move, so that the inclination angle of the movable guide plate is changed, and the position of the roller and the rotation angle of the chuck are accurately adjusted. The method can effectively compensate the molded surface springback in the blade rolling process, improve the machining quality, reduce the number of times of die finishing, improve the production efficiency and reduce the cost.

The invention discloses a bar pinch roll conveying device. The bar pinch roll conveying device comprises a box body, an inlet guide groove device, an outlet guide groove device, a pair of double-rocker-arm pinch rolls and a gearbox assembly, wherein the inlet guide groove device and the outlet guide groove device are arranged at the two ends of one side of the box body respectively; the double-rocker-arm pinch rolls are arranged on the box body in an up-down spaced mode; the gearbox assembly is arranged in the box body and used for being in transmission connection with the double-rocker-arm pinch rolls; the driving assembly is arranged on one side of the box body, and the box body is provided with a channel which is used for the driving assembly to extend into and is in transmission connection with the gearbox assembly. The pinch roll and the gearbox assembly are integrated in one box body, so that the occupied space is effectively reduced, meanwhile, a transmission part is prevented from penetrating through the wall of the box body, the complexity of the transmission part is simplified, and the maintenance difficulty is reduced; the guide groove can be pushed to rotate along the mounting seat by inserting the positioning bolts into the adjusting holes at different positions, so that the guide groove device can be adaptive to guide positioning of rolled pieces with different specifications, the whole guide groove device does not need to be replaced, and the production efficiency of a rolling line is improved.

The utility model relates to the technical field of rolling mills, in particular to a front pinch roll device of a take-up machine and a rolling mill system. A front pinch roll device of a take-up machine comprises a pinch roll box provided with a containing space; the output roller mechanism comprises a first roller shaft and a second roller shaft, a first roller ring is arranged at the end, extending out of the clamping roller box body, of the first roller shaft, a second roller ring is arranged at the end, extending out of the clamping roller box body, of the second roller shaft, and rolled metal can pass through the space between the first roller ring and the second roller ring; the eccentric sleeve assembly comprises a first eccentric sleeve and a second eccentric sleeve, the first eccentric sleeve is arranged between the first roller shaft and the clamping roller box body, the second eccentric sleeve is arranged between the second roller shaft and the clamping roller box body, and the end, stretching into the clamping roller box body, of the first eccentric sleeve is provided with a first fan-shaped tooth end; a second sector tooth end is arranged at the end, stretching into the clamping roller box body, of the second eccentric sleeve, and the first sector tooth end and the second sector tooth end are arranged in a meshed mode. The pinch roll device solves the problems that a pinch roll device is large in occupied space and complex in structure in use.

The invention relates to a method for operating a rolling mill and to a corresponding rolling mill. The rolling mill comprises a plurality of rolling stands n, numbered n=1 to N, arranged one behind the other in a rolling direction R, each with two rotary-driven work rolls for rolling a metal strip. Furthermore, a strip tension control loop 120 is provided for controlling the actual strip tension of the metal strip 20 in a drawing section 110 between two rolling stands arranged one behind the other to a predetermined target strip tension. In order to reduce thickness deviations in the metal strip being rolled due to acceleration and / or deceleration phases within the framework of said strip tension control, the invention provides that the control variable is applied not only to a rolling stand limiting the drawing section 110 on the exit or entry side, but also to the rotary drives for other rolling stands or rolls upstream or downstream.According to the invention, at least one rotary drive is integrated into the active belt tension control both before and after the belt section.

The present invention relates to a method (100) and to a device (10) for determining a target value (S) for a selected production parameter (P) of a rolling mill (200) comprising at least one group of roll stands (230) for rolling a metal product (12) into a metal strip (14), and to a rolling mill (200) comprising such a device (10), to a computer program product and to a machine-learned model (40). A value (W) of a material parameter (M) for a predetermined reference material is provided (S1). A correction factor (c2) for the material parameter (M) is determined (S3) by a machine-learned model (40), which is based on a recurrent neural network (42), on the basis of previously known metal-strip-production production parameters (P*). The target value (S) for the production parameter (P) of the rolling mill (200) may then be determined (S4) on the basis of a physical production parameter model (52) that incorporates the material parameter value (W) adapted with the correction factor (c2) and target specifications (Z) for the rolling of the metal strip (14).