920results about "Profile control device" patented technology

The invention provides a cold-rolled sheet shape multivariable cooperative control optimization method and system. The method comprises the steps that rolling tension set value parameters are determined on the basis of a dynamic coupling model so as to be matched with dynamic tension fluctuation in the high-speed strip steel rolling process of a cold-rolled sheet, the magnetic conductivity change in the strip steel rolling process is detected through the magnetoelastic effect, and a magnetic conductivity gradient map is generated; residual stress distribution data are inverted based on the magnetic conductivity gradient map, and target axial roll shifting control parameters influencing the roll gap shape are generated; and multivariable cooperative matching is conducted on the rolling tension set value parameter and the target axial roll shifting control parameter, a matching result is obtained, the rolling tension and the roll gap shape are adjusted, and strip steel deviation and fluctuation caused by dynamic coupling of the composite material tension and the cold-rolled sheet shape in the cold-rolled sheet high-speed strip steel rolling process are restrained. According to the technical scheme, through cooperative control of the dynamic coupling model and the magnetic conductivity gradient map, deviation and fluctuation of the strip steel are effectively restrained, and the shape stability and rolling precision of the cold-rolled plate are improved.

The invention provides a cold-rolled strip steel plate shape closed-loop control method and system based on dynamic feedback, and belongs to the technical field of cold-rolled strip steel production.The method comprises the steps that a dynamic incidence matrix and a plate shape deviation signal are generated based on cold-rolled strip steel transverse measuring point data, processing the dynamic incidence matrix to obtain a space correlation defect feature vector of the cold-rolled strip steel, and processing the strip shape deviation signal to obtain a multi-dimensional defect feature vector; determining the strip shape defect type of the cold-rolled strip steel based on the multi-dimensional defect feature vector and the space correlation defect feature vector; and strip steel production control parameters are adjusted based on the strip shape defect type. The plate shape quality stability of the cold-rolled strip steel can be improved.

The invention provides a method for reducing the transverse same-plate difference of a silicon steel product. The method comprises the following steps that S1, the original roller convexity of a cold-rolled silicon steel rolling mill is increased; s2, upper and lower middle rollers of the cold-rolled silicon steel rolling mill are moved, and the axial movement positions of the upper and lower middle rollers are determined according to the width of the strip steel; s3, adjusting the bending roller of the cold-rolled silicon steel rolling mill according to the rolling reduction rate: increasing the forward bending extension amount of the bending roller of the cold-rolled silicon steel rolling mill; s4, the total reduction rate of the cold-rolled silicon steel rolling mill is increased; s5, the strip steel tension of the cold-rolled silicon steel rolling mill is increased; and S6, the same-plate difference of the cold-rolled strip steel is reduced, and meanwhile the plate shape is improved. According to the method, the transverse same-plate difference of the silicon steel cold-rolled strip steel can be reduced to 0.0048-0.0051, and the requirements of manufacturers of motors, transformers and the like on the transverse same-plate difference of silicon steel products are met.

The invention provides a metal plate strip shape recognition and control method based on model fusion. The method comprises the steps that plate shape data and time sequence data corresponding to the plate shape data are collected; carrying out statistics on plate shape defect conditions according to the plate shape data, and carrying out classification and label identification on defects; carrying out normalization processing and matrix processing on the plate shape data, and endowing a probability label value of a category to which the plate shape belongs, so as to form a first data set; constructing a CNN model, and dividing the first data set for training, verifying and testing the CNN model; marking corresponding plate shape state change time points and types for the time sequence data; segmenting the time sequence data into time windows with fixed lengths to form a second data set; constructing an LSTM model, and using the second data set to train, verify and test the LSTM model; and connecting the trained and tested CNN model and the trained and tested LSTM model in series so as to predict and control defects of the plate shape.

The invention relates to the technical field of titanium alloy rolling processing, and discloses a method for inhibiting surface cracking in the rolling process of a high-strength titanium alloy thick plate, which comprises the following steps: selecting a titanium alloy plate blank, and preheating the plate blank; the preheated plate blank is subjected to surface multi-pass rolling treatment, and the roll gap set in the later-pass rolling treatment is smaller than that in the previous-pass rolling treatment; remelting and heating the plate blank, wherein the heating temperature is higher than the preheating temperature; the plate blank is discharged out of the furnace and subjected to multi-pass rolling, a rolled plate blank is obtained, and the rolling pass rolling reduction is controlled to range from 5 mm to 25 mm; and the rolled plate blank is straightened on line and then air-cooled to the room temperature. According to the method, the surface layer of the plate blank substrate is subjected to structure prefabrication, the surface plasticity is improved, the extensibility in the rolling process is improved, and generation of surface cracks is restrained.

The invention provides a hot rolled strip convexity prediction method based on weight distribution strategy hybrid modeling, and relates to the technical field of metallurgical machinery and automation. The method comprises the following steps: acquiring historical production data in the rolling process of a hot-rolled strip, and establishing a convexity mechanism model of the hot-rolled strip; an improved ant colony algorithm is adopted to optimize the extreme learning machine, and a hot rolled strip convexity data driving model is constructed; calculating the information entropy of the mechanical model and the information entropy of the data driving model by adopting an entropy weight method; according to the model information entropy, calculating an initial weight coefficient of a mechanical model and an initial weight coefficient of a data-driven model, and establishing a hybrid model through a weighted summation method; and in hot-rolled strip production of different rolling units, the weight is dynamically adjusted according to the deviation value between the predicted value and the actual value of the mechanism model and the data driving model, and a final hot-rolled strip convexity prediction result is output. By adopting the method, the accuracy of convexity prediction of the hot-rolled strip can be improved.

The invention relates to the technical field of metal processing and digital control, and discloses a digital control method and system for copper strip rolling production, and the method comprises the steps: obtaining a technological parameter sequence and a surface image in a rolling process in real time; analyzing the dynamic change trend of the process parameter sequence to obtain parameter fluctuation characteristics; if the parameter fluctuation characteristic exceeds a preset fluctuation threshold value, identifying a microscopic adhesion position of the copper strip surface image and determining a complete distribution map of an adhesion range; analyzing by combining defect features extracted from the complete distribution map and the process parameter sequence to obtain a parameter interaction weight; and based on the parameter interaction weight, generating optimized process parameter configuration and adjusting an equipment operation state. According to the method, the problem that the control precision of the dynamic defects on the surface of the copper strip is insufficient in the prior art is solved by establishing the dynamic correlation between the process parameters and the surface defects and performing data-driven closed-loop control.

The invention relates to the technical field of hot-rolled strips, in particular to a three-point difference dynamic adjusting method in the rolling process of hot-rolled strips, which comprises the following steps: S1, preparation before rolling and parameter initialization: roller shape matching and model parameter preloading; s2, dynamic regulation and control at the threading stage: thickness pre-compensation and temperature gradient suppression; s3, steady-state rolling control is conducted, specifically, three-point difference real-time monitoring and compensation are conducted, and thermal convexity dynamic compensation is conducted; and S4, drifting and exception handling: tail stability control and intelligent transition material insertion. According to the method, a full-process control system covering dynamic roll gap regulation and control, temperature-stress coupling compensation and intelligent decision support is constructed, and the problems that head and tail thickness fluctuation is difficult to restrain and edge thinning exceeds the standard by developing an asymmetric roll bending force distribution model and a rolling rhythm self-adaptive roll type matching strategy through traditional single-point thickness control can be effectively solved.

The invention relates to the technical field of hot rolling, in particular to a hot rolling unit finished strip section shape and strip shape forecasting method which comprises the following steps: carrying out transverse unit distribution division on a roll system; the rolling pressure borne by the working roller is segmented; analyzing roller system stress and calculating roller deflection; calculating transverse distribution values of the inter-roller pressure and the rolling force; calculating a section shape distribution value of the finished strip according to a roll gap equation; calculating a front tension transverse distribution value; and calculating the strip shape distribution of the finished strip. The method has the advantages that the metal deformation model and the roll shape elastic deformation model in the hot rolling process are established, the section shape and the plate shape of the finished strip are calculated by coupling the two models, and forecasting of the section shape and the plate shape of the finished strip of the hot rolling unit is completed; the forecasting result obtained by adopting the scheme of the invention conforms to the quality of the product real object produced in an industrial batch mode, and the provided theoretical calculation model can be directly applied to an industrial production line, so that the purposes of simplifying the production process and reducing the production cost are achieved.

The invention relates to the technical field of metal plate rolling processing, and discloses a rolling strengthening method capable of reducing the rigidity of a metal plate, which comprises the following steps: applying an asymmetric rolling condition to an initial plate to enable the plate to generate a speed gradient in the thickness direction; the plate is subjected to one-pass large-rolling-reduction rolling, and a non-continuously-distributed shear band is formed; the rolled plate is heated to the dynamic recrystallization temperature interval of the plate, and multi-pass small-rolling-reduction warm rolling is conducted on the plate; and in the warm rolling process, dynamic recrystallization of a shear band is promoted to form a grain-refined continuous core layer, complete recrystallization of the surface structure of the plate is inhibited to keep the work hardening state of the plate, and therefore the metal plate with the rigidity lower than that of an initial plate is obtained. According to the invention, a soft core-hard shell heterostructure is constructed in the plate, high strength and low macroscopic rigidity are synergistically realized, the process controllability is strong, and the method is suitable for preparation of high-performance structural materials.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

To provide a warpage measurement method of a metal plate for detecting warpage of a metal plate with high accuracy, and to provide a warpage measurement device, a program, a warpage control method for reducing the warpage of the metal plate, and a manufacturing method of the metal plate with reduced warpage.SOLUTION: A warpage measurement method of a metal plate includes: an imaging step of capturing an image including at least one of a leading end portion and a trailing end portion of the metal plate; an extraction step of detecting a side surface region corresponding to a side surface portion of the metal plate from the image and extracting a coordinate group representing a boundary position of the side surface region; and a specification step of specifying warpage of the metal plate based on the extracted coordinate group.SELECTED DRAWING: Figure 5

The invention provides an intelligent decision-making dynamic cooperative control method for a roller cooling system, and relates to the field of industrial production intelligent control. The method comprises the following steps that the spraying state of each nozzle is monitored in real time; the minimum cooling liquid injection amount of process cooling in the rolling process is calculated; the sectional cooling flow in the rolling process is calculated, and the sectional cooling flow is not lower than the minimum cooling liquid injection amount; master-slave control is formed by process cooling and subsection cooling, the process cooling is responsible for macroscopic temperature field regulation and control, and local defect compensation is executed by the subsection cooling; when it is detected that the nozzles are blocked or fail, the flow compensation algorithm of the adjacent nozzles is started, and the standby micro nozzles are activated to execute fine compensation flow distribution; and after sectional cooling fails, on the basis of executing fine compensation flow distribution, roller fine cooling is adopted to eliminate defects of composite wave shapes, namely high-order plate shapes. The method can effectively solve the problem of high-order plate shape defects caused by failure of a sectional cooling system, and the stability and precision of plate shape control are improved.

The invention relates to the field of hot-rolled plate strip steel rolling plate shape control, and discloses a CVC roller control method and system for hot-rolled plate strip steel, specifically, detailed grading calculation is carried out according to the width and thickness of the strip steel, the reasonably-distributed step length and roller bending force of a CVC roller are obtained, and through collected disturbance factors, the CVC roller bending force is obtained. And a corresponding roll bending force compensation value and a corresponding step length compensation value of the CVC roll are obtained, and finally dynamic control over the CVC roll and the bending roll is formed. According to the method, smooth transition of the channeling amount of the CVC roller is achieved through optimization treatment of step size amplitude limiting of the CVC roller, the systematic control capacity is improved by combining linkage of the bending roller and the CVC roller, the systematic disturbance rejection capacity is improved through depth cooperation of static setting and dynamic adjustment, and the stability of a roller gap and the strip shape quality of strip steel are guaranteed.

The embodiment of the invention discloses a parameter determination method and device, equipment, a medium and a program product, and the method comprises the steps that the current rolling pass of a strip and the current rolling parameters of a rolling mill are obtained; the current rolling pass is used for representing the current number of times of rolling the strip by the rolling mill; determining strip shape information of the strip; a target model corresponding to the current rolling pass is determined from the multiple models; different models in the plurality of models correspond to different training modes; and by means of the target model, based on the strip shape information of the strip and the current rolling parameters of the rolling mill, strip shape control parameters, used for rolling the strip, of the rolling mill are determined. Therefore, compared with the prior art that the roll bending force is adjusted manually, the strip shape control parameters of the rolling mill are determined through the model, and the accuracy of determining the strip shape control parameters of the rolling mill can be improved.

The invention relates to a hot continuous rolling strip steel plate shape control method and device and electronic equipment. The method comprises the steps that plate blank PDI data, equipment parameters and model parameters are read; calculating speed, temperature and thickness parameters of each finish rolling rack based on a finish rolling model; the roll bending force set value of each rack is calculated, and the roll bending force reference value, the convexity self-learning distribution value, the straightness self-learning distribution value and the operator intervention value of the SAMP model table are superposed in response to the situation that the rolling specification is not replaced, so that the roll bending force set value is generated; in response to replacement of steel types, thickness or width specifications, on the basis of superposition of non-replaced specifications, a roll bending force difference value of the SAPP model table and the SAMP model table is introduced to be multiplied by a dynamic adjustment coefficient, and a roll bending force set value is generated; a roll bending force set value is issued to an execution system at the finish rolling inlet moment; and the actual convexity and straightness of the finish rolling outlet strip steel are collected, target values are compared, and the set value of the next plate blank is corrected through self-learning. The method improves the target convexity and straightness hit rate of the hot-rolled strip steel.

The invention discloses a cold rolling temper mill strip shape closed-loop control method based on data driving, and relates to the technical field of strip steel rolling and temper production, and the method comprises the following steps: carrying out strip shape mode identification on outlet strip steel of a cold rolling unit, converting a complex strip shape into a strip shape mode coefficient, and based on historical production data, carrying out cleaning, screening and analysis to obtain a strip shape model coefficient; the method comprises the following steps: establishing a temper mill data model between a strip shape regulation and control means and a strip shape mode coefficient, utilizing model prediction control to construct a strip shape closed-loop controller of the temper mill, and utilizing the strip shape closed-loop controller to calculate an optimal control parameter of the strip shape regulation and control means based on an actually measured strip steel strip shape mode coefficient and a target strip shape mode coefficient. And the information is issued to the plate shape regulation and control mechanism for closed-loop regulation. According to the method, data analysis, model prediction control and real-time closed-loop control are combined, the problems that the cold rolling unit temper mill plate shape control precision is poor, and stable and continuous production is difficult are solved, and the plate shape quality and yield of plate and strip products are remarkably improved.

The invention provides an X-type six-roller mill plate shape forecasting method, and belongs to the technical field of metallurgical rolling. The method comprises the following steps: collecting equipment parameters of the X-type six-roller mill, strip characteristic parameters and corresponding rolling process parameters; dividing units and solving influence coefficients; solving the plastic deformation of the strip; carrying out iterative calculation on the roll system elastic deformation model and the strip plastic deformation model until convergence; forecasting the transverse distribution value of the pre-tensile stress of the strip during rolling; and strip outlet plate shape transverse distribution during rolling is forecasted. According to the method, on the basis of the strip plastic deformation model and the roll system elastic deformation model, the pre-tensile stress after rolling is calculated, and then strip shape forecasting is achieved.

The application discloses a kind of suitable for high manganese non-magnetic steel's regrinding rolling process, belong to technical field.The regrinding rolling process includes the following steps: (1) using the regrinding process of ladder transition, the upper surface edge defect of high manganese non-magnetic steel blank is regrinded treatment;(2) using the regrinding process of ladder transition symmetric with upper surface to the lower surface of blank regrinding treatment;(3) the blank after regrinding treatment of upper surface and lower surface is heated treatment;(4) using two-stage controlled rolling process.The regrinding rolling process used in the application is regrinded by ladder transition in the place where blank edge has defect, without regrinding the entire lower surface, after using this regrinding method, the regrinding amount of blank is reduced, and the regrinding efficiency is improved, and the blank yield is improved.The application uses economic TMCP process, and the process is simple, the production cycle is short, and the production cost is low.

The invention provides a novel four-roll hot mill roll bending device which comprises a working roll, a supporting roll, a rack, an operation side fixing block, a transmission side fixing block, a roll shifting cylinder, an operation side moving block and a transmission side moving block, bearing seats of the working roll and the supporting roll are in contact connection through a base plate, a hydraulic cylinder acts on the bearing seat of the supporting roll and abuts against the base plate, and the base plate is in contact connection with the hydraulic cylinder. The operation side fixing block and the transmission side fixing block are fixedly installed on the machine frame, the roll shifting cylinder is installed on the operation side fixing block, and one end of the roll shifting cylinder is connected with the operation side fixing block. The operation side moving block is arranged on the operation side fixing block in a sliding mode and connected with the roll shifting cylinder through a locking pin shaft. The transmission side moving block is arranged on the transmission side fixed block in a sliding manner; and the operation side moving block and the transmission side moving block are connected with the working roll bearing seat through the bearing seat locking device. Roll bending control is carried out on the supporting roll and the working roll at the same time, the surface quality and the yield of the plate blank are improved, and the key effect is achieved on production and efficiency improvement of a steel mill.

The invention discloses a control method and device for improving black marks on the surface of a thick plate in the technical field of controlled rolling and controlled cooling. The method comprises the steps that a pretreated plate blank is obtained; the pretreated plate blank is heated according to a preset heating system, and a heated plate blank is obtained; the heated plate blank is input into a descaling box to be descaled, and a plate blank subjected to primary descaling is obtained; the plate blank subjected to primary descaling is firstly input into a roughing mill to be subjected to cogging broadening and then input into a finishing mill to be subjected to thickness rolling treatment, and a semi-finished steel plate is obtained; and straightening and cooling the semi-finished steel plate to obtain a finished steel plate. The technical problem that in the prior art, due to existing controlled rolling and controlled cooling processes, black marks appear on the surface of the steel plate, and consequently the production cost is increased can be solved.

The invention discloses a steel forming straightness control method for an engineering machinery suspension arm and the engineering machinery suspension arm, a direct installation mode is adopted in a hot rolling heating stage, the temperature of a high heat section is 1300 + / -20 DEG C, and the time of the high heat section is 70-140 minutes; in the rolling stage, a front rack oversized reduction + F7 flexible micro-medium wave compensation strategy is adopted for rolling production; in the cooling stage, ultra-fast cooling and air cooling are adopted for cooling to the coiling temperature; the heat treatment process adopts a vacuum radiation heating method for tempering. The thickness of the prepared steel plate is 2.55-5.01 mm, the length of the prepared steel plate is 5.5-6.5 m, the strength grade of the prepared steel plate is 765-845 MPa, the prepared steel plate is used for manufacturing a telescopic suspension arm of an engineering machinery overhead working truck, after the steel plate is integrally bent and formed, the straightness of a part in the length direction is smaller than or equal to 3 mm / L, and the problem that the straightness of the suspension arm is out of tolerance after high-strengthening, light-weight and environment-friendly manufacturing of engineering machinery is effectively solved.

The present invention belongs to the technical field of non-oriented silicon steel production and discloses a method for improving the cold-rolled edge quality of high-grade non-oriented silicon steel burr coils. The method comprises: cold rolling using a multi-stand continuous rolling mill or a single-stand reversible rolling mill for 5 to 7 rolling passes, controlling the flatness of the plate after the first, second, and final rolling passes to meet a specific formula; in addition, the rolling speed of the first pass, the emulsion flow rate of the first and second passes, and the original roughness of the mill work rolls can be further controlled. The present invention achieves the purpose of controlling rolled edge cracks and reducing edge waves by adopting a large edge wave rolling mode and adjusting the rolling speed, emulsion flow rate, and the original roughness of the work rolls, thereby achieving optimal cold-rolled edge quality of the burr coils and improving production efficiency and product yield.

The invention discloses a method for avoiding deviation and strip breakage in cold continuous rolling specification changing and related equipment, and relates to the technical field of automatic control in the rolling process. On the basis of the steel grade number, an adjustment plan suitable for rolling completion of the cold tandem mill is determined according to a preset steel grade transition rule, the preset steel grade transition rule is constructed on the basis of a steel grade material corresponding to the steel grade number, and the adjustment plan comprises production parameters of the to-be-adjusted steel; determining whether the steel grade materials of the adjacent steel grades in the adjustment plan meet a preset transition requirement or not; and under the condition that the steel grade materials of the adjacent steel grades meet the preset transition requirement, cold continuous rolling is conducted on the steel on the basis of the adjustment plan.

The invention discloses a plate shape adjusting method, device and equipment for thin-specification plating high-strength steel and a medium, and belongs to the technical field of metallurgy. The method comprises the steps that the thickness and the width of the thin-specification plating high-strength steel are obtained; in the finishing period of the thin-specification plating high-strength steel, the diameter, the length and the convexity of a working roller and the diameter and the length of a supporting roller of a finishing machine are all adjusted to be corresponding target values, and a roller shape curve of the supporting roller is adjusted to be a target curve; according to the thickness and the width, the finishing elongation of the finishing machine is adjusted to be 0.9-0.1%, and the roll bending force of the finishing machine is adjusted to be 600-1000 KN; adjusting the insertion amount of a bending roller group of a withdrawal and straightening machine to be 0 during the withdrawal and straightening process of the finished thin-specification coated high-strength steel fed into the withdrawal and straightening machine; and according to the thickness and the width, the insertion amount of a straightening roll set of the withdrawal and straightening machine is adjusted to be 20-30 mm, and the withdrawal and straightening elongation is adjusted to be 0.05-0.1%. According to the method, the plate shape problems of C warping and edge waves of the thin-specification plating high-strength steel can be greatly reduced.

The present invention discloses a method for controlling the centerline deviation of an outlet slab by automatic leveling of R1, and relates to the technical field of hot rolling rough rolling process. In view of the problem that the current hot rolling rough rolling leveling effect completely relies on manual adjustment by manual operation experience, resulting in frequent manual intervention and increased labor load, the following scheme is proposed, which includes the following steps: S1, collection and processing of the centerline deviation of the slab; S2, determination of the leveling pass; S3, determination of the leveling amount; S4, restriction conditions for the use of automatic leveling; S5, control process. The present invention is a method for automatically adjusting the deviation of the rough rolling R1 oil column to control the roller gap difference on both sides of the rolling mill before rolling the next slab, based on the centerline deviation of the last pass of the previous slab R1 detected by the width gauge at the outlet of the rough rolling mill, so as to achieve the purpose of automatically controlling the centerline deviation of the outlet slab of the next slab at the last pass of R1, so that the accuracy of plate shape leveling is uniformly improved.

The invention discloses a roller grinding management method based on the surface quality of a copper plate strip, and aims to solve the problems that existing roller grinding depends on experience, positioning is inaccurate, and grinding is excessive or insufficient. The method comprises the following steps: collecting waveform data of copper print defects and flatness on the surface of a copper plate strip, and performing timestamp synchronous calibration with a rolling speed and a coil length counting signal of a rolling mill; constructing a roller damage reverse diagnosis mechanism, calculating a damage angle in combination with a copper printing coordinate, identifying a damage type, and calculating a wear depth; differentiated grinding work orders are generated according to different damage types, and high-precision positioning grinding is executed; and after returning to the production line, carrying out on-line real-time monitoring and off-line sample rechecking on the original damaged position, dynamically adjusting parameters and judging the grinding fit state. Precision, differentiation and closed-loop management of roller grinding are achieved, the grinding efficiency is effectively improved, the service life of the roller is effectively prolonged, the surface quality of a copper plate strip is remarkably improved, and the defect rate is reduced.

The invention provides a plate shape control method of a metal strip for a metal mask plate, and relates to the field of material forming. The plate shape control method of the metal strip for the metal mask plate comprises the following steps: controlling a raw material metal strip to be subjected to primary cold rolling; the metal strip is controlled to be subjected to first-time shaping treatment; the metal strip is controlled to be subjected to chemical thinning treatment; the metal strip is controlled to be subjected to cold rolling again; and the metal strip is controlled to be subjected to reshaping treatment. According to the strip shape control method of the metal strip for the metal mask plate, the transverse tolerance of the strip can be reduced by optimizing the process, so that the consistency of the local length of the strip is improved, and the overall strip shape of the strip is improved.

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 discloses a single-line laser medium plate surface flatness measuring method and system, and belongs to the field of metallurgical equipment intellectualization, and the method comprises the steps: obtaining a laser line image of a to-be-measured medium plate, the laser line image being an image obtained by carrying out laser line projection on the medium plate through line lasers in the longitudinal direction and the transverse direction; collecting a cross point of the projected laser rays in two sequentially adjacent laser ray images, and correcting according to the cross point of the projected laser rays; performing image preprocessing on the laser line image, performing laser contour line extraction on the preprocessed laser line image, and obtaining an area surrounded by the extracted laser contour line; according to the area surrounded by the extracted laser contour line and the standard area, the surface straightness of the medium-thickness plate is obtained through calculation; the calculation precision and stability of the straightness of the medium-thickness plate are improved.