753results 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 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 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 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 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 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 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.

The invention discloses equipment and a method for customizing front and back morphology structures of an invar alloy ultra-thin strip, and belongs to the field of invar alloy ultra-thin strip processing. The equipment comprises a working roller with differentiated surface topography, a first middle roller with a polyurethane-based organic material coating layer, an ultrasonic clamping device, an integrated tension weighting control system and a central control unit. By configuring different surface roughness of the upper working roll and the lower working roll and combining stable transverse pressure stress and axial ultrasonic vibration provided by the first middle roll, asymmetric plastic flow and shape copying of metal on the front face and the back face of the strip are achieved. In the rolling process, plate shape defects caused by friction differences are dynamically compensated by cooperatively adjusting the roll shifting amount of the first intermediate roll and the convexity of the backing roll saddle, finally, customized production of the 4J36 invar alloy ultra-thin strip with the thickness of 15 microns is achieved, the A face and the B face of the strip have different surface roughness, and the surface roughness of the strip is greatly improved. And the specific requirement of a fine metal mask plate pore-forming process on the surface state of the base material is met.

The invention discloses a machining device and method for metal belt production, and relates to the technical field of metal belt machining, the machining device comprises an uncoiler, a cutting machine is arranged on one side of the uncoiler, and a pickling machine is arranged on one side of the cutting machine; a cold rolling mill is arranged on one side, far away from the cutting machine, of the pickling machine; the cold-rolling mill comprises a cold-rolling rack, and an upper cold-rolling roller assembly is installed in the cold-rolling rack in a matched mode. Lower cold roller assemblies are symmetrically arranged below the upper cold roller assembly. The bottom of the lower cold roller assembly is installed on an inverted trapezoidal table, and the inverted trapezoidal table is arranged on the adjusting mechanism and connected with the guide frames on the two sides in a matched mode. Compared with a traditional mode that only the middle roller moves upwards for adjustment, more adjustment freedom degrees are provided; the multi-dimensional adjusting mode can better meet the rolling requirements of steel plates of different materials and different specifications, and the plate shape and thickness precision of the metal belt can be effectively improved by reasonably adjusting the rolling force in the vertical direction and the rolling force in the horizontal direction.

The invention provides a method for eliminating a galvanized strip steel finishing twill defect, and belongs to the technical field of metal processing, and the method comprises the following steps: inputting fusion data into a twill defect analysis model to obtain a twill defect probability value of each area of the strip steel surface, the fusion data being strip steel thickness information and width information; determining a first adjustment strategy of the finishing equipment according to the twill defect probability value, and controlling the finishing equipment to perform primary finishing on the strip steel based on the first adjustment strategy to obtain first strip steel; and determining a target adjustment strategy of the finishing equipment according to the finishing result of the first strip steel, and controlling the finishing equipment to perform second finishing on the first strip steel based on the target adjustment strategy to obtain target strip steel. According to the method for eliminating the galvanized strip steel finishing twill defect, the twill defect risk of the strip steel is reduced through precise regulation and control over finishing equipment.

The invention relates to the technical field of steel rolling production quality detection, in particular to a steel rail bending and torsion online monitoring control method based on a thermal-state 3D full-section contour scanner, which is applied to a finish rolling mill and comprises the following steps: acquiring data of a steel rail, including a bending angle, a torsion angle and temperature data; formulating a corresponding control strategy according to the data of the steel rail; dynamically optimizing a control strategy through a PID (Proportion Integration Differentiation) control algorithm in combination with the monitoring data and the state of the finish rolling mill; and a mapping relation between steel rail deformation and parameters is established, an anti-overregulation mechanism is set, and online monitoring and control of steel rail bending torsion are achieved. Three-dimensional point cloud and temperature data of a plurality of sheet layers of the steel rail are obtained in real time, bending and torsion parameters are calculated through an intelligent algorithm and then transmitted to a finish rolling mill control system in real time through the industrial Ethernet, parameters such as roller pressure and roller gaps are automatically adjusted based on a preset control model, a real-time closed loop of detection-calculation-adjustment is formed, and the real-time control of the steel rail is achieved. And ensuring that the steel rail geometric shape meets the standard in the tapping stage.

The invention provides a plate shape control and plate thickness precision collaborative optimization method in the rolling process of a cold-rolling mill, which relates to the technical field of cold-rolling mill control, and comprises the following steps: acquiring contact parameters between a rolling working roll and a supporting roll, determining a contact stress distribution state, and acquiring the bending deformation of the working roll; constructing a coupling mapping relation between plate shape moment distribution and stress distribution; a compensation coefficient is adaptively adjusted according to the rolling state, and a dynamic collaborative optimization objective function is established; and working roll bending force and supporting roll displacement meeting the target are obtained through calculation, and rolling parameters are adjusted in real time. According to the method, cooperative control over the plate shape and the plate thickness is achieved, and the quality of cold-rolled products is improved.

The invention discloses a preparation method of a wide 304 stainless steel cold plate for a movable pressure vessel. The preparation method comprises the steps of raw material chemical component design, rolling mill roll shape design, rolling mill rolling control and cold line solid solution pickling withdrawal and straightening control. Through raw material chemical component design, raw materials with appropriate raw material chemical component requirements are provided for the cold rolling process, and the alloy cost is saved under the condition that the performance is guaranteed; through the design of the roll shape of a rolling mill, a middle roll with enough taper and a working roll with enough convexity are provided, and the requirement that the plate shape control reaches an expected value in the rolling process is met and achieved; through rolling process control of a rolling mill, the rolling process is matched with a plate shape target curve, and it is guaranteed that the rolled strip steel plate is straight in shape and accurate in thickness; and through cold line solid solution pickling withdrawal and straightening control, the plate shape and the surface quality of the product are improved to the maximum extent. After the production method is adopted, the surface qualified rate and the performance standard-reaching rate of the produced wide 304 stainless steel cold plate for the mobile pressure container reach 100%, and the plate shape unevenness is smaller than or equal to 10 mm / m.

The invention discloses a bimetal thin strip rolling composite interface strengthening method and device based on middle-pass roller roughening. The method comprises the steps that basic parameters of a bimetal thin strip and rolling capacity parameters of a rolling mill are obtained; calculating the limit composite thickness of each pass based on the rolling mill capacity parameters and the basic parameters; based on the limit composite thickness, the number of passes needed by the rolling technology is determined; testing the surface appearance of the composite strip rolled in each pass, and determining the evolution rule of the surface roughness; and based on a surface roughness evolution rule, a texturing roller is adopted for rolling in the middle pass, and a smooth roller is adopted for rolling in the last pass. The texturing roller is introduced into the middle pass, so that the dissimilar metal bonding area is remarkably increased, the interface bonding strength is effectively improved, meanwhile, the deformation resistance difference of dissimilar metal is balanced, the material coordinating deformation capacity is improved, and the phenomena of brittle compound generation and shear stress concentration at the interface are restrained; therefore, the overall performance and quality of the composite thin strip are remarkably improved.

The present invention discloses a control method for the peak number of surface roughness in the rolling of EDT automotive sheets by a six-high aluminum cold rolling mill, including the following: (1) using a six-high HC cold rolling mill with Ф480mm / Ф560mm / Ф1300mm*2050mm; (2) roughening the rolls: after roughening, the surface roughness of the rolls is Ra: 1.9 - 2.4μm, and Rpc: 100 - 120 / cm; (3) calibrating the rolling force at 1000 - 3000 KN with the roll gap close to zero, and calibrating the bending force of the work roll Fwb and the intermediate roll FImb to be 15% - 30%; (4) adopting a rolling force control mode. The present invention can effectively improve the peak number and reduce the production cost; the product quality of automotive sheets has been significantly improved.

The invention relates to a control method for improving the wedge shape of an intermediate billet by a roughing mill. The control method comprises the step of distinguishing slabs tapped from different heating furnaces. And the plate blanks discharged from the same heating furnace are implemented according to the same set of roll gap lifting or pressing adjustment strategy. And adjusting parameters are set for each pass of the roughing mill unit. And rough rolling adjustment setting is conducted according to a finished product wedge-shaped index feedback result produced by the finishing mill, and automatic setting output is achieved. And the adjustment amount set by the R1 is distributed to each pass of each rough rolling rack according to the proportion. And R2, performing lifting or pressing adjustment on the three passes according to the calculated wedge-shaped data of the three sections divided by the finish rolling outlet strip steel. According to the method, the wedge size control precision of the hot-rolled intermediate billet can be effectively improved, so that the thickness, convexity, wedge shape and straightness of a final hot-rolled finished product meet precision requirements, and meanwhile, process waste products or head and tail rolling breakage caused by the fact that a finishing mill group cannot normally penetrate due to camber of the head of the intermediate billet are avoided.

This invention discloses a wedge control method for finishing mills based on hot-rolled production data, belonging to the field of steel rolling automation technology. The method includes: determining whether the roughing mill exit shape of the current strip is the same as that of the previous strip; when the F7 exit multifunction meter does not detect strip, calculating a first roll gap adjustment amount based on the above determination result using the difference in rolling force between stands or according to the genetic relationship between strip shapes; when the F7 exit multifunction meter detects strip, calculating a second roll gap adjustment amount based on the wedge detected by the F7 exit multifunction meter; and weightedly combining the first and second roll gap adjustment amounts to obtain the final roll gap adjustment amount. This invention combines operator experience with a mechanistic model to establish a scientific and accurate wedge control model, which can effectively reduce operator intervention and improve the stability of the rolling process and the accuracy of wedge control.

The invention provides a method for improving the section profile of a cold rolling raw material, which comprises the optimization of a convexity target value of a finishing mill group, a CVC roll shifting amount and a rack roll bending force parameter, and specifically comprises the following steps: if a wave shape and / or a high point appears in the middle of strip steel, reducing the convexity target value; if the edge of the strip steel is warped and / or warped in a cat ear shape, the convexity target value is increased; if waves and / or high points appear in the middle of the strip steel, the CVC roll shifting amount is reduced; if the edge of the strip steel is warped and / or warped in a cat ear shape, the CVC roll shifting amount is increased; after the strip shape is straightened, the roll bending force of a floating rack in the finishing mill group is adjusted, and if a wave shape and / or a high point appears in the middle of the strip steel, the roll bending force is reduced; if the edge of the strip steel is warped and / or warped in a cat ear shape, the roll bending force is improved; and the roll gap deviation or the roll bending force of the midstream frame is adjusted according to the actual strip shape of the strip steel. Adjustment of the plate shape and the section wheel is considered, and control over the effective section contour of the strip steel is guaranteed.