774results about "Roll mill control devices" patented technology

The invention relates to the technical field of intelligent regulation and control of fusion data, in particular to a rolled finished product-based size precision intelligent regulation and control system and method, which comprises a data acquisition unit, a data fusion unit, a deep learning prediction unit and a compensation execution unit, multi-source data such as temperature gradient, roll gap fluctuation and tension spectrum are collected in real time through a sensor array, thermal expansion compensation correction is carried out through a data fusion unit based on a rolling elasticoplastic deformation equation, an anti-interference coupling feature vector is generated by using adaptive Kalman filtering, and a deep learning prediction unit is used for predicting the rolling elasticoplastic deformation through a dual-channel space-time convolutional network. The thickness error and the width error are predicted by combining the constraint of a rolling force balance equation, the compensation execution unit dynamically generates the roll gap adjusting amount and the rolling force compensation amount according to a three-level response mechanism, phase lag compensation current is injected to suppress resonance, the high-end steel yield and the rolling precision are improved, and the rolling quality is improved. And an intelligent closed-loop control scheme is provided for high-precision rolling under complex working conditions.

The invention provides an aluminum product rolling process real-time monitoring and optimizing system based on digital twinning, and relates to the technical field of power battery aluminum foil rolling. The monitoring and optimization system comprises a data acquisition module, a digital twin modeling module, a real-time monitoring module, a dynamic optimization module, a feedback control module, a green manufacturing optimization module and a cross-alloy adaptive module. According to the aluminum product rolling process real-time monitoring and optimizing system based on digital twinning, the data acquisition module, the digital twinning modeling module, the real-time monitoring module, the dynamic optimizing module, the feedback control module, the green manufacturing optimizing module and cross-alloy self-adaption work cooperatively; the defects in the aspects of data acquisition and integration, process parameter optimization and anomaly detection, energy consumption optimization and green manufacturing in the prior art are overcome.

The invention discloses a non-oriented silicon steel multi-roller continuous rolling plate shape control process which comprises the following steps: establishing a multi-dimensional dynamic model, and constructing a rolled piece-roller-cooling multi-dimensional physical field coupling model; designing a multi-section polynomial roll-shaped structure, and adjusting parameters of each section of a roll-shaped curve according to the characteristic parameters of the plate strip; setting a dynamic control weight, and adjusting the control priorities of roll bending, roll shifting and rolling force in real time according to the rolling stage; executing plate shape prediction and correction, and updating a control quantity influence coefficient by utilizing a self-adaptive correction technology; and performing plate shape evaluation and optimization, and performing multi-objective optimization according to objective functions of plate shape deviation, energy consumption and roller consumption. By constructing a rolled piece-roller-cooling multi-dimensional physical field coupling model, adopting a multi-section polynomial roller shape structure and a dynamic weight adjustment technology and combining a self-adaptive correction and multi-objective optimization method, the high-order wave shape control problem is effectively solved, and accurate plate shape control in the whole rolling process is achieved.

The invention provides a seamless steel pipe for a hollow anchor rod and a strength regulation and control method thereof. Alloy steel round steel is heated and then subjected to hot piercing to be manufactured into a hollow pipe blank; the hollow pipe blank is subjected to spheroidizing annealing treatment and then cooled, and a first treated steel pipe is obtained; wherein the ferrite grain size D1 of the first treated steel pipe is calculated according to a spheroidizing annealing grain size model; the first treated steel pipe is subjected to cold finish rolling forming and cleaned to obtain a second treated steel pipe; the ferrite effective grain size Ddef of the second treatment steel pipe is calculated according to the cold deformation grain refinement model; recrystallizing and annealing the second treated steel pipe to obtain the seamless steel pipe; the ferrite grain size D2 of the seamless steel pipe is calculated according to the recrystallization grain evolution model; the yield strength Rp0.2 of the seamless steel pipe is calculated according to a strength model; reverse design of the yield strength of the seamless steel pipe is achieved, and meanwhile it is guaranteed that the seamless steel pipe has good plasticity.

The invention relates to the technical field of digital twinning, in particular to a steel processing equipment self-adaptive control method based on digital twinning, which comprises the following steps: acquiring real-time signals such as displacement, load, rotating speed and inter-unit tension of an actuating mechanism, inputting the real-time signals into a digital twinning model, and constructing an instantaneous dynamic geometric model to calculate an instantaneous feedback value of a controlled object; the influence coefficient between the first control loop and the second control loop is analyzed through virtual perturbation, and a partial derivative sensitivity matrix is generated; and then, inputting the instantaneous feedback value into a self-adaptive controller to obtain an original control increment, calculating a compensation control increment of a second execution mechanism in combination with an actually measured morphology deviation signal and an influence coefficient, and finally driving a controlled object to complete action response. A cyclic storage buffer area is established, and asynchronous timestamp alignment based on spatial displacement is executed. Through multi-physics field coupling and asynchronous correction, self-adaptive control over the steel machining equipment is achieved.

The invention provides a strip steel offset detection method and device, equipment and a storage medium, and the method comprises the steps: obtaining an initial production image of to-be-detected strip steel at a target production node, obtaining the position information of a roller way center line of a finishing mill frame, extracting a strip steel contour from the initial production image, and obtaining the strip steel contour information; determining strip steel center line position information based on the strip steel contour information, calculating an actual deviation value of the to-be-detected strip steel according to the strip steel center line position information and the roller way center line position information, and determining a strip steel deviation state according to a comparison result of the actual deviation value and a preset deviation threshold value; according to the method, the outline of the strip steel is automatically extracted through the image processing technology, the offset is accurately calculated, real-time monitoring and objective judgment of the offset state are achieved, the offset can be quantified automatically, objectively and accurately, manpower and material resources consumed in the production process are reduced, and safety and management efficiency in the strip steel production process are improved.

The invention relates to the technical field of rolling mill automatic control, in particular to a special rolling mill controller without a PLC framework and an integrated control system, and aims to solve the problems that in rolling of a rolling mill, the sampling rate difference of pressure and thickness sensors and material plastic deformation accumulation cause the time sequence dislocation of a rolling force peak value and a thickness valley value, the collaborative utilization of data by a thickness control algorithm is influenced, and the cost is reduced. In order to solve the problems that rolling force, thickness data and roller pulse signals are collected through a special controller, and a rolling length observation benchmark is converted; the dynamic phase compensation unit calculates a plastic deformation cumulant, after triggering compensation, a basic phase difference is established based on a sampling rate difference, a compensation coefficient is dynamically increased, a compensation data segment is generated through linear interpolation, and a time sequence is forcibly aligned; and the integrated control unit inputs the alignment data into a thickness control algorithm, the rolling force serves as feedforward, the thickness data serves as feedback, a precise roller gap adjusting instruction is generated, and the material thickness rolling precision is improved.

The invention discloses an automatic detection and control method for a pressing roller in an SSP area. The automatic detection and control method comprises the following steps that S1, strip steel enters a waiting position; s2, whether the strip steel enters a pressing roller or not is judged, if yes, the step S3 is executed, and if not, the step S1 is executed again; s3, whether the main crank is at a set angle or not is judged, if yes, the step S4 is executed, and if not, the main crank is located at a second load position; s4, the main crank is located at a first load position; s5, whether the pressure of the pressing roller is larger than a set threshold value or not is judged, if yes, the step S6 is executed, and if not, the step S4 is executed again; s6, the pressing roller executes pressure control; and S7, whether the strip steel leaves the pressing roller or not is judged, if yes, the step S1 is executed, and if not, the step S6 is executed. It is guaranteed that the pressing roller of the strip steel does not slip, impact can be greatly reduced, roller face abrasion of the pressing roller is reduced, and the service life of the pressing roller is prolonged.

The invention relates to an aluminum plate strip rolling thickness control method and system based on thickness data simulation. The method comprises the steps that real-time working condition data in the aluminum plate strip rolling process is obtained; a roller thermal expansion dynamic model is constructed, the roller thermal crown is calculated in real time based on the real-time working condition data, and the thickness compensation amount is generated according to the roller thermal crown; a thickness dynamic response model is constructed, based on real-time working condition data, the thickness deviation, the thickness deviation change rate and the cumulative sum of the thickness deviation of the aluminum plate strip are calculated, and the thickness adjusting amount is calculated through a PID control algorithm; the thickness compensation amount and the thickness adjusting amount are fused, and a hydraulic pressing position adjusting instruction is generated; the hydraulic automatic thickness control system drives a hydraulic cylinder to adjust a roller gap according to the hydraulic screw-down position adjusting instruction; the method has the advantages that the thickness compensation amount based on multi-section temperature accurate calculation and the thickness adjusting amount based on real-time deviation dynamic adjustment are efficiently fused, and the thickness control precision and the dynamic response speed are remarkably improved.

The width control method in the hot continuous rolling and rough rolling cross rolling process comprises the steps that casting blank parameters, product parameters, roller parameters and technological parameters are determined; the rolling reduction of each pass of flat rollers of the rough rolling double racks and the rolling temperature of each pass are calculated; calculating the width free broadening amount of each pass, the total free broadening amount and the width value after broadening; calculating the total width reduction amount of the vertical rolls of the roughing mill unit, the width reduction amount of each pass and the width of the steel plate after width reduction; according to the dog bone recovery broadening coefficient and the free broadening coefficient of the previous rolled steel plate, the free broadening coefficient and the dog bone recovery broadening coefficient of the current steel plate during cross rolling are determined; calculating the free broadening amount and the dog bone recovery amount after the width is reduced and the dog bone is rolled by the flat roll; calculating a new width reduction amount of each pass and a set value of the width of the steel plate in each pass after width reduction; and according to the set value of the steel plate width of each pass, the vertical roll opening degree control value in the rolling width control process of each pass is obtained through calculation.

The invention relates to an aluminum plate casting and rolling control method and system, and the method comprises the steps: collecting real-time technological parameters, including molten aluminum temperature, aluminum plate thickness, rolling speed, rolling pressure, cooling speed and surface quality information, in an aluminum plate casting and rolling process, and predicting aluminum plate temperature distribution, stress strain, thickness change and potential defects based on thermodynamics and mechanical models; the casting speed, the rolling speed, the rolling pressure and the cooling condition of the molten aluminum are dynamically adjusted, closed-loop control is achieved, the system comprises a data acquisition module, a data processing and analysis module, a control and execution module and a man-machine interaction and visualization module, and the system supports automatic correction of thickness deviation and surface defects, abnormal alarm and historical data analysis. The method adopts model predictive control, an artificial intelligence algorithm or a hybrid optimization algorithm to realize adaptive control. The method has the advantages that the thickness uniformity and the surface quality are optimized, the production efficiency and reliability are improved, and the safe, intelligent and efficient operation effect in the aluminum plate casting and rolling process is achieved.

The invention relates to an automotive frame steel plate with tensile strength of 750MPa and a hot rolling control method thereof, and belongs to the technical field of iron-based alloys. The steel plate comprises the following chemical components in percentage by mass: 0.05-0.08% of C, 0.1-0.3% of Si, 1.7-2.0% of Mn, less than or equal to 0.025% of P, less than or equal to 0.0030% of S, 0.05-0.1% of Ti, 0.04-0.08% of Nb, less than or equal to 0.0060% of N, 0.02-0.06% of Al, 0.3-0.7% of Mo, less than or equal to 0.0050% of Ca and the balance of iron and inevitable impurities. During hot rolling, the continuous casting sheet billet is controlled to be heated to 1250-1350 DEG C and then rolled, the rough rolling finish rolling temperature is 1050-1000 DEG C, the finish rolling finish rolling temperature is 880-900 DEG C, the reduction rate is larger than or equal to 60%, laminar cooling after rolling adopts front-section cooling, the cooling speed is 40-50 DEG C / s, and a hot rolled steel coil is obtained through coiling when the coiling temperature is 600-650 DEG C. Through proper chemical component design and hot rolling process condition control, the high-strength hot-rolled acid-washed automobile beam steel plate with the yield strength of 700-800 MPa and the tensile strength of 770-850 MPa is obtained.

The invention discloses a rolling material preparation control method and device based on a hot rolling plan of slabs of the same family. The method comprises the following steps: acquiring hot rolling plan data; sorting the plurality of stack positions; according to the sequence, all plan slabs and all non-plan slabs in each stack position are determined in sequence, and a slab set needing stack transfer in the stack positions is determined; grouping the plan slabs which belong to the same family number and are adjacent to each other to obtain a plurality of plan slab groups; setting a plurality of vacating stack positions, taking one vacating stack position as a non-planned vacating stack position, and taking other vacating stack positions as planned vacating stack positions; moving each non-planed slab to a non-planed moving stack position, and moving each planed slab group to a corresponding planed moving stack position; and after all the non-planed slabs are returned to the stack positions, all the planed slab sets are returned to the stack positions in sequence. According to the method, the plate blank stack turning workload in the planned rolling material preparation process is effectively reduced, and the working efficiency of travelling material preparation is improved.

The invention relates to a temperature and thickness deformation linkage hot rolling online MPC control method which comprises the following steps: based on an asymmetric disturbance relation between temperature change and deformation quantity response, identifying coupling sensitive points with mutual disturbance suppression of the temperature change and the deformation quantity response, and performing decoupling processing according to a time sequence; the deformation quantity residual trend of the previous period is used for decomposition and back compensation of the thickness error of the current period, and thickness correction is carried out only under the inertia trend instability condition; on the premise that the temperature path is known or predicted, the influence on the follow-up deformation quantity trend is pre-judged, and pre-pressing control over the potential excessive deformation path is achieved; an area in which the temperature gradient and the thickness compression ratio fluctuate severely at the same time is detected and defined as a temperature-thickness resonance area, a temperature-dominated control strategy is actively switched, and deformation quantity controls abdication; when the temperature, the thickness and the deformation quantity reach an unstable boundary combination state, the controller is triggered to enter a critical stable field with convergence priority, the three-parameter disturbance behavior is preferentially suppressed through an internal stability mechanism, and output switching is controlled.

The application relates to the technical field of steel metallurgy, and discloses a rolling process for improving the surface quality of C70S6 non-adjustable steel, which comprises the following steps: S1, a heating process; S2, a descaling process; S3, a rolling process; S4, a cooling process; and S5, a finishing process.The process can significantly reduce thermal stress cracks, the temperature uniformity of the casting blank from the surface to the core is improved through a three-stage heating mode and precise heat preservation control, the thermal stress is effectively released, the anti-collision and spacing control during charging are combined, local overheating or overcooling is avoided, the occurrence rate of surface micro-cracks and corner transverse cracks is reduced by more than 80%, and the surface integrity of the casting blank is greatly improved.The process can completely solve the iron oxide scale defects, the double high-pressure water descaling process after the furnace and before the medium rolling is adopted, the optimized combination of the descaling pressure and the water flow speed ensures that the residual area of the iron oxide scale is less than or equal to 3%, the iron oxide scale pressing-in defects are completely eliminated, and the surface cleanliness of the steel is significantly improved, thereby providing a high-quality base for subsequent processing.

The invention provides a real-time diagnosis method and system for production data fluctuation. The real-time diagnosis method comprises the steps that S1, process parameters of production data fluctuation monitoring are collected; s2, calculating and obtaining a deviation value between a previous scanning period and a current scanning period based on the process parameters; s3, according to the deviation value, the urgent degree of the technological parameters is calculated and obtained, and then a deviation interval is set; s4, judging whether the real-time urgent completion degree is within the deviation interval or not, if so, judging that the real-time urgent completion degree is normal, and not processing the real-time urgent completion degree; and if not, judging that the signal is abnormal, and outputting an abnormal signal. The invention provides the diagnosis method based on the urgent fullness degree, the fluctuation of the actual value of the parameter is more carefully monitored, the instantaneous variation is also responded, and the fluctuation is reduced, so that the operation of the unit is more stable.

The invention relates to a long object processing device. The present invention is provided with: a conveyance device (20) that conveys a long material (2) in a conveyance direction (A); a processing device (30) for processing the long material (2); a control device (60) that controls the operation of the conveyance device (20) and the processing device (30), causes the processing device (30) to continuously process the long material (2) in the conveyance direction, and causes the processing device (30) to process the long material (2) by changing a plurality of different processing conditions over time during the continuous processing; a reference position detection device (22A) that detects a reference position (Re) that serves as a reference for the long material (2); a transport amount detection device (21) that detects the transport amount of the long material (2) from the reference position (Re) in the transport direction (A); and a storage device (70) that stores the processing conditions acquired from the control device (60) in association with the amount of conveyance from the reference position (Re) acquired from the amount of conveyance detection device (21), in units of the amount of conveyance, for the long product (1) processed and manufactured by the processing device (30).

The application provides a cold rolling method for reducing surface cracks of TC4 titanium alloy seamless pipes, relates to a cold rolling pipe manufacturing technology in the metallurgical and mechanical industries, and comprises the following steps: adopting a two-roller cold rolling machine to roll a blank with a specification of Ф76*7.5mm into a finished product with a specification of Ф25*3mm. When rolling, the left and right openings of the groove are designed to be asymmetric, Fx1 and Fx4 are constant, the sizes of Fx2 and Fx3 are 0.1mm larger than those of Fx1 and Fx4, and the sizes are used to accommodate part of the long axis of the cross-section ellipse of the seamless pipe; meanwhile, the opening angle is constant, and the opening angle Fw2 is 5° larger than Fw1. Through optimization of the deformation tools such as the mandrel and the roller groove, reasonable adjustment of the feed amount and the rotation angle, the occurrence of the effective inner and outer surface cracks is effectively reduced. According to the characteristics and technical requirements of different TC4 titanium alloy seamless pipes, the cold rolling pipe manufacturing process is organized and implemented, the surface defect loss of the titanium alloy pipe is reduced, the surface rolling quality is continuously and stably improved, and the energy saving, emission reduction and consumption reduction effects are remarkable.

The embodiment of the invention relates to the field of hot-rolled strip steel production, in particular to a hot-rolled strip steel production control method and device, equipment and a storage medium, and according to the method, a finish rolling device is controlled to carry out finish rolling treatment on heated strip steel and then output the strip steel. And the laminar cooling device is controlled to convey the strip steel output by the finish rolling device to the coiling device. After a conveying mechanism of the laminar cooling device bites steel, whether the preset condition is triggered or not is detected in real time. And under the condition that the preset condition is triggered, the transmission mechanism is controlled to carry out accelerated transmission. Under the condition that the preset condition is triggered, the conveying mechanism can be controlled to conduct accelerated conveying, waste steel caused by arching of the head of the thin strip steel passing through the finish rolling outlet output roller way due to immediate acceleration after steel biting is avoided, and then the production process is safe, stable and smooth.

The invention provides a seamless steel tube closed-loop processing method based on online in-situ monitoring, which comprises the following steps: when a steel tube reaches a preset online in-situ monitoring station, imaging and identifying the surface of the steel tube through a high-resolution visual system, and planning a plurality of microscopic detection stations; carrying out multi-mode rapid scanning on the surface of the steel pipe by utilizing an atomic force microscope at each microscopic detection site, extracting microscopic characteristic parameters in real time, and forming a microscopic fingerprint data packet of the current steel pipe; inputting the microscopic fingerprint data packet into a pre-trained process inversion model to generate a process adjustment instruction; and the process adjustment instruction is issued to a corresponding execution mechanism in real time through a production line control system, the machining parameters of the current steel pipe or the subsequent steel pipe are adjusted, and microcosmic quality closed-loop control is formed. According to the technical scheme provided by the invention, the crossing from fixed process machining to self-adaptive microstructure regulation and control machining is realized, and the microstructure consistency and the machining precision of the seamless steel tube are improved.

The application provides a kind of interlock control method of fixed-width press, comprising the following steps: S1, collecting the running state signal of heating furnace area and roller area;S2, according to the running state signal, determine the current working condition is real tapping state or test state;S3, the judgment result of S2 is used as the enabling condition of fixed-width press area receiving secondary process control system setting data, only in real tapping state, allow fixed-width press area to receive and execute secondary setting data, shield secondary setting data in test state;S4, the judgment result of S2 is used as the interlock condition of fixed-width press automatic position control (APC) program activation, only in real tapping state, release APC program lockout to allow equipment action, in test state, forcibly lock APC program to prohibit equipment action.The application can guarantee the safety of equipment operation, improve the stability and controllability of production process.

The invention relates to the technical field of strip steel cold rolling, and discloses a rolling load optimization method based on strip steel cold rolling strip breakage prediction.The method comprises the steps that real-time parameter data in the strip steel rolling process are collected, optimized rolling parameter data are generated, optimized rolling parameters are iteratively optimized, and a prediction analysis end is arranged to predict the rolling load of the strip steel. When strip steel cold rolling strip breakage risk real-time prediction is carried out, pertinence of high silicon steel fragile material risk identification is guaranteed by establishing a strip breakage risk judgment standard and setting differentiated risk thresholds for strip steel of different marks, meanwhile, real-time rolling parameters are input into a prediction model, and a strip breakage probability value is dynamically generated; by means of the method, whether the strip breakage risk exceeds the standard or not at the rolling load optimization position of the strip steel can be detected in real time, the safety early warning accuracy in the strip steel rolling process is guaranteed, the strip breakage accident rate is further reduced, when it is detected that coiling L-shaped deviation exists, it is guaranteed that the stable state is dynamically recovered when the coiling form of the strip steel is abnormal, and the rolling continuity is improved.

The invention provides an intelligent steel transfer control method and system for a thick plate production line. The method comprises the following steps: acquiring standard data of a rough rolling link of the thick plate production line and acquiring a standard image in a steel transfer area through image acquisition equipment; inputting the standard image into the target detection model, and outputting feature data; inputting the standard data and the characteristic data into a rotating speed prediction generation model, and outputting a rotating speed control curve of the steel rotating roller way; and a steel rotating request signal in the rolling process state data is extracted, a control command and a rotating speed given instruction of a steel rotating roller bed are generated according to the rotating speed control curve, and the steel rotating roller bed is controlled to drive the intermediate billet to rotate according to the rotating speed control curve. The rotating speed control curve is generated by extracting the standard data and the characteristic data in the rolling process state data, the steering command and the rotating speed given command are generated based on the rotating speed control curve, the steel rotating roller way is driven to operate according to the commands, and the problems that manual steel rotating is low in precision, lagged in response and low in efficiency are solved.

The invention relates to a rolling stand 20 for rolling stock, comprising a rolling stand frame 3 at a drive side AS; and a rolling stand frame 3 at an operating side BS, in which in both rolling stand frames the roll necks of the work rolls 1 are rotatably mounted in chocks 13; a screw down device 4 in both rolling stand frames 3 for applying a rolling force via the chocks 13 to the work rolls of the rolling stand 20; at least one measuring device 6 for generating a measuring signal, assigned to one of both rolling stand frames 3; and an evaluation device 8 for evaluating the measuring signal taking into account the rolling force exerted by the screw down device 4 on the work rolls. In order to better protect the measuring device 6 from contamination and corrosion and, as a result, to achieve more accurate measurement signals and control results, the roll stand according to the invention has in at least one frame support 3a, 3b of at least one of the roll stand frames 3 at least one bore 7; and the measuring device 6 is inserted into the bore 7 and is configured for detecting a deformation of the bore 7 upon the action of the rolling force and for generating the measurement signal representative of the detected deformation of the bore 7.

The invention discloses an intermediate billet shearing method, device and equipment and a storage medium, and belongs to the technical field of hot continuous rolling control, the method comprises the steps that in response to a starting instruction of an automatic shearing mode of a current intermediate billet, current process parameters and a preset mapping relation of the current intermediate billet are obtained; wherein the preset mapping relation is used for representing the corresponding relation between the historical process parameters of the historical intermediate billet and the optimal historical shear compensation value; searching an optimal historical shearing compensation value corresponding to a historical process parameter which is the same as the current process parameter in the preset mapping relation; adjusting a preset shearing position according to the searched optimal historical shearing compensation value; and the current intermediate billet is sheared according to the adjusted shearing position. According to the method, the preset shearing position is dynamically adjusted by combining the technological parameters of the intermediate billet and the optimal historical shearing compensation value, the accuracy of the shearing position of the intermediate billet is improved, and the yield is increased while the rolling stability is guaranteed.

The application discloses a method for controlling a guide plate queue before shearing to improve rolling rhythm, and a queue control CSG module is additionally arranged in a finish rolling TDC control unit to generate a guide plate control queue, so that the opening width setting value of the guide plate required by the next strip is obtained in advance, and then the guide plate control is started according to the control logic of the queue control CSG module, so that the new width setting is executed in advance, and the steel feeding block caused by the guide plate action not being in place is avoided. Through the introduction of the queue, the action of the guide plate before the flying shear is free from the restriction of whether the flying shear finishes the current strip tail cutting, the guide plate is pre-acted, the guide plate before the flying shear can be pre-acted to place according to the required opening degree when the width specification of the next strip is changed, the steel feeding block problem in the finish rolling area is avoided, the equipment failure shutdown caused by the strip being stuck in the guide plate area is eliminated, and the rolling rhythm of the production line is improved.

The present application relates to a kind of control method for improving hot-rolled strip take-up draw narrow, belong to width size control technical field specially applicable to metal rolling mill.The method is by the historical process parameters of the occurrence take-up draw narrow of hot-rolled production line, utilize the width curve of the width model automatic tracking of existing L2 control system to obtain take-up draw narrow curve, and to take-up draw narrow curve with its mirror image orientation fitting curve, again using the position point coordinate required when fitting of the fitting curve to calculate the narrow amount S, narrow length L and the starting position P1 of take-up draw narrow form history parameter, then compare the current strip reading parameter of real-time production line with history parameter to trigger and calculate the starting position Pc of rough rolling E2 vertical roll required to compensate take-up draw narrow and compensation rolling length Lc, to finally compensate the width fluctuation of strip due to take-up draw narrow generated by previous rolling.

The invention provides a belt head and belt tail positioning system and method and related equipment, and relates to the technical field of automation control in the metallurgical industry. The system comprises at least two positioning switches, a sewing machine, a belt head, a belt tail and a controller. The at least two positioning switches are used for generating corresponding deceleration starting signals when the tape head passes through; the controller is used for controlling the tape head to decelerate to a corresponding speed according to the corresponding deceleration signal, and the speed of the tape head is reduced to a first speed when the tape head passes through a first positioning switch in the at least two positioning switches; when the tape head passes through a second positioning switch of the at least two positioning switches, the speed of the tape head is reduced to the second speed or kept at the first speed, and the first positioning switch is located in front of the second positioning switch in the moving direction of the tape head. Accurate positioning lap joint control of the belt head and the belt tail at the sewing machine can be achieved, and the problem that positioning is not accurate under the influence and restriction of the space environment and the positioning speed is solved through ingenious step-by-step positioning design and software logic optimization.

The application discloses a kind of bar full length production method and device, the method includes: in the upstream and downstream of bar length flying shear, obtain the distance between hot metal detector;According to the distance between hot metal detector, the pulse equivalent of rolling mill is calculated;The pulse count value of rolling mill motor encoder is collected, and according to pulse count value and pulse equivalent, the actual length of finish rolling product is calculated, and the total pulse count value of rolling mill motor encoder is predicted according to the actual length of finish rolling product;According to pulse total count value and pulse equivalent, the predicted length of finish rolling product is calculated;Obtain length and fixed length, remove length and fixed length from the predicted length of finish rolling product, obtain non-fixed length;According to non-fixed length, flying shear tail is cut in the upstream of bar length flying shear.The application can reduce the personnel investment of collection area, improve production stability and production efficiency.