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93results about How to "Improve thickness control accuracy" patented technology
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Reversible cold rolling mill flow quantity AGC band thickness control method
InactiveCN101116874AHigh control precisionImprove yieldRoll mill control devicesMetal rolling arrangementsTime delaysEngineering
The invention discloses a flow AGC strip thickness control method of a reversing cold rolling mill, which comprises detecting steps of strip thickness and speed at the input and output of the rolling mill, detecting and computating steps of stiffness coefficient of the rolling mill and plasticity coefficient of strip, control steps of precontrolling AGC, monitoring AGC and hydraulic pressure APC in the control of the hydraulic pressure AGC. The invention is characterized in that the flow AGC strip thickness control method of a reversing cold rolling mill, comprises a establishing steps of a mathematical model of the flow AGC control, computating steps of strip theoretical thickness difference at the output of the rolling mill, computating steps of gap compensation regulation of the rolling mill; the cap regulation of delta Sh of the flow AGCregulated by a PI regulator ,is used as the thickness control of the rolling mill, that is, steps of thickness closed ring control of gap compensation of the endocyclic hydraulic pressure AGC of the hydraulic pressure AGC. The invention has real-time thickness compensation without a time delay and is suited to being widely popularized in AGC system of strip single stand reversing cold rolling mill.
Owner:中国一重集团有限公司 +1
Micro-tracking method and system of rolled pieces in the process of rolling periodic variable-thickness strips
ActiveCN101602065AMeet the accuracy requirements for position trackingMeet the precision requirementsRoll mill control devicesProgramme control in sequence/logic controllersComputer control systemHydraulic cylinder
A micro-tracking method and a system of rolled pieces in the process of rolling periodic variable-thickness strips belong to the technical field of rolling. The method comprises the following steps: dividing thickness zones, thinness zones and transition zones on the rolled pieces of the periodic variable-thickness strips, setting whether the incoming materials are uniform-thickness rolled pieces or periodic variable-thickness rolled pieces, determining the starting point of rolling, micro-tracking the rolling length in the process of rolling and carrying out tracking correction on the periodic variable-thickness rolled pieces. The system comprises a rolling mill; coiling machines are arranged at both sides of the rolling mill respectively; length-measuring rollers are arranged between the coiling machines and the rolling mill; thickness gauges are arranged at both sides of the rolling mill respectively; coil diameter gauges are arranged on the coiling machines; a rolling force sensor and a hydraulic cylinder are arranged on the rolling mill; tensiometers are arranged below the length-measuring rollers and pulse coders are arranged on the length-measuring rollers; the thickness gauge, the coil diameter gauge, the rolling force sensor, a displacement sensor of the hydraulic cylinder, the tensiometer and the pulse coder are respectively connected with a computer control system.
Owner:SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
Thickness controlling method and control system in periodicity thickness changing strip rolling process
ActiveCN101633003ARealize automatic controlImprove thickness control accuracyRoll mill control devicesProgramme control in sequence/logic controllersComputer control systemHydraulic cylinder
The invention discloses a thickness controlling method and a control system in periodicity thickness changing strip rolling process, belonging to the technical field of rolling. The method comprises the following steps: zoning on a rolled piece; determining the roll-gap adjusting amount Sff controlled by feedforward thickness; determining the roll-gap adjusting amount Sfd controlled by feedback thickness; determining the roll-gap adjusting amount Slc controlled by zoning length; determining the final roll-gap setting value; sending the final roll-gap setting value into a thickness controlling system; and adjusting the roll gap of a rolling mill by the thickness controlling system. The system comprises the rolling mill; two sides of the rolling mill are respectively provided with a coiling machine, and a length measuring roller is arranged between the coiling machine and the rolling mill; a thickness measuring instrument is arranged between the length measuring roller and the rolling mill; a rolled diameter measuring instrument is arranged on the coiling machine; the rolling mill is provided with a rolling force sensor and a hydraulic cylinder displacement sensor; a tensiometer is arranged below the length measuring roller; one end of the length measuring roller is provided with a pulse coder; the thickness measuring instrument, the rolled diameter measuring instrument, the rolling force sensor and an equal measuring signal all enter a computer controlling system.
Owner:SHENYANG DONGBAO HAIXING METAL MATERIAL TECH
Hot rolled strip steel rolling force optimal-setting method
ActiveCN104841700AImprove setting accuracyImprove thickness control accuracyMeasuring devicesProfile control deviceSingle passHot rolled
The invention provides a hot rolled strip steel rolling force optimal-setting method and relates to the technical field of control of hot rolled strip steel production process. The problem that in the prior art, a laboratory thermal simulation test and rolled steel production actual data are not simultaneously utilized to conduct optimal setting on rolling force is solved. According to the hot rolled strip steel rolling force optimal-setting method, a stress strain curve of a material is measured through a laboratory thermal simulation single-pass test and is regressed into a deformation resistance model in a one-way compression state, then a deformation resistance model coefficient in an actual rolling state is corrected according to actual rolling process parameters for future rolling force setting and calculation, accordingly the setting accuracy of a hot rolled strip steel rolling force model is improved, and overload phenomenon and the like are avoided. The hot rolled strip steel rolling force optimal-setting method is suitable for rolling force setting and calculation under the condition that the actual rolling process data of multiple-pass hot rolled strip steel are obtained when the deformation resistance model for the rolling force mode is obtained through data regression measured through a laboratory heat simulation machine.
Owner:张家港市欧美轻工工具制造有限公司
Thickness control method of finish roller strip steel and device
ActiveCN101869914AReduce the impact of errorsImprove thickness control accuracyRoll force/gap control deviceStrip steelComputer science
The invention discloses a thickness control method of finish roller strip steel, which comprises the following steps: obtaining simultaneous point measured data and same point measured data; putting the simultaneous point measured data into an iterative model to obtain the same time point flow thickness by calculation; putting the simultaneous point measured data and the same point measured data into a roll gap model to respectively obtain the simultaneous point bounce thickness and the same point bounce thickness by calculation; mathematically transforming the difference between the simultaneous point flow thickness and the simultaneous point bounce thickness to be taken as the zero correction value of the roll gap model; and according to the difference between the same point bounce thickness and the zero correction value, obtaining the latter calculated rolling force by calculation and comparing with the same point measured rolling force to obtain the study coefficient of a rolling force model, and adjusting the rolling force of a roll gap value according to the aero correction value of the roll gap model and the study coefficient of the rolling force model. The invention also discloses a device for realizing the method. The method and the device can greatly improve the thickness control precision of finish rolled strip steel.
Owner:BAOSHAN IRON & STEEL CO LTD
Method and system for automatic thickness control over high-precision strip steel rolling under monitoring
ActiveCN102343365AHigh adjustment accuracyImprove performanceRoll mill control devicesMetal rolling arrangementsEstimation methodsEngineering
The invention provides a method and system for automatic thickness control over high-precision strip steel rolling under monitoring. In the method and system, monitoring AGC (Automatic Gain Control) and AGC of flow rate per second are combined to use, and the advantages of the monitoring AGC and ACG of the flow rate per second are combined to increase thickness control precision of strip steel products; errors of an equation of the flow rate per second is corrected by using a precision measured value of an outlet thickness gauge, so that the AGC performance of the flow rate per second is further increased; and integral AGC control is completed by regulating the speed of driving rollers of a rolling mill, and the integral AGC regulation precision can be further increased compared with thatregulated in a traditional manner of regulating the roller gaps of the rolling mill. A special synchronous transmission model TPM (Transport Model) is used to realize the synchronous transmission of step steel parameters, and the defects of the traditional Smith estimation method are overcome. A consecutive mean module is used to precisely solving a mean value of thickness errors on a monitoring section under the condition that the speed of strip steel changes arbitrarily.
Owner:中国冶金科工股份有限公司
Preset control method for thickness flying gauge change of hot-dip zinc coating
ActiveCN103469137AInhibition effectImprove uniformityHot-dipping/immersion processesAir knifeModel parameters
The invention provides a preset control method for a thickness flying gauge change of a hot-dip zinc coating. The method comprises the following steps: with a strip steel speed, air knife pressure, and a distance between an air knife and the surface of strip steel as main influence factors and by applying a principal component analysis method, building a thickness preset model of the coating by using a least-square fitting algorithm of a log-log space; carrying out long-term self-adaption adjustment and short-term self-adaption adjustment on the thickness of the coating aiming at the effects of a variable speed, a target thickness and a strip steel substrate thickness on the thickness of the coating existing in the flying gauge change process; and carrying out online updating calculation on thickness model parameters of the coating by using a Kalman filtering algorithm and a smooth filtering algorithm in thickness control, so as to improve the preset accuracy of the model parameters. By adopting the preset control method, the control problems of overlarge thickness deviation of the coating and coating thickness detection lag caused by changes of the target thickness of the coating, the strip steel substrate thickness and the strip steel speed are solved; automatic preset control of the thickness of the zinc coating is achieved; the thickness deviation of the zinc coating is reduced; the thickness control accuracy of the zinc coating is improved; zinc consumption is reduced; the galvanization cost is also saved.
Owner:ANGANG STEEL CO LTD
Counterflow roller changing method for realizing online roller changing of ESP (endless strip production) finishing mill unit
ActiveCN106269888AImprove roll changing efficiencyImprove stabilityRoll force/gap control deviceMetal rolling stand detailsPulp and paper industryChanging equipment
The invention provides a counterflow roller changing method for realizing online roller changing of ESP (endless strip production) finishing mill unit. The method is used for ESP finishing mill unit online roller changing equipment equipped with six racks. During normal rolling production, any five racks are put into operation, and one rack is used as a standby rack. The method adopts a counterflow roller changing strategy and comprises the following steps: (1) collecting and inputting of collecting technology, strip and mill parameters; (2) roller lifting and speed regulation of the roller changing rack Fi; (3) roller speed regulation and roller gap adjustment of the transition rack F (i+1); (4) roller speed regulation and roller gap adjustment of the transition rack F (i+2); (5) adjustment of the transition racks in the upstream of the standby rack Fj; (6) pressing down and roller speed regulation of the standby rack Fj. By control of the roller changing process according to the mathematic model provided by the method, the roller changing efficiency and the roller changing process stability can be improved, the control precision of the product thickness is improved, and the industrial application accuracy requirement can be met.
Owner:YANSHAN UNIV
Hot-rolling and finish-rolling strip steel thickness control method
ActiveCN103934278AAccurately obtain the plasticity coefficientImprove thickness control accuracyRoll mill control devicesMetal rolling arrangementsProduction lineStrip mill
The invention provides a hot-rolling and finish-rolling strip steel thickness control method which is especially suitable for metal rolling mills or control devices for machining products, and particularly relates to a method for controlling the thickness of hot-rolling and finish-rolling strip steel through computer programs. According to the detection value of rolling actual performance value of a machine frame, the thickness of strip steel at the outlet of the machine frame is calculated; the moment the calculated strip steel thickness data reaching the machine frame is tracked and combined with the rolling actual performance value data, the plasticity coefficient of the strip steel passing through the machine frame is calculated in real time; according to the plasticity coefficient, which is obtained through real-time calculation, of the strip steel, the roll gap adjustment amount of the machine frame is determined, and feed-forward control is carried out on the thickness of the strip steel in real time. The control method can accurately obtain the plasticity coefficients of different sections of the strip steel, the plasticity coefficients are shown in roll gap adjustment amount of the different sections so as to be adaptive to hardness changes of the strip steel, control precision of the thickness of a finish rolling area is improved, a software programming control method is adopted, hardware investment is not needed, and the method is widely applied to new production lines and production line renovation projects.
Owner:BAOSHAN IRON & STEEL CO LTD
Automatic gauge control (AGC) self-adaptive control method for hot rolling mill
ActiveCN103464471ADoes not affect normal useImprove thickness control accuracyRoll mill control devicesMetal rolling arrangementsAutomatic controlAutomatic train control
The invention relates to an automatic gauge control (AGC) self-adaptive control method for a hot rolling mill, wherein the problem, which cannot be solved by an AGC setting model, that thickness control precision of several strip steel heads before changing a specification during a rolling procedure is not high is solved. The technical scheme of the invention is that the AGC self-adaptive control method for the hot rolling mill comprises the following step of performing an AGC self-adaptive control function of online adjusted of the presetting roll gap and roll force of the rack selected at front end of the rolling mill and all racks at the rear end of the rolling mill according to a different value between the real roll gap and real roll force of the rack at the front end of the rolling mill during a steel biting procedure and the roll gap and roll force preset by the AGC setting model, so that the thickness control precision of the strip steel heads at the exit of the rolling mill is improved.
Owner:SHANGHAI MEISHAN IRON & STEEL CO LTD
Method for preparing green-light and transparent ceramic phosphor applied to high-photosynthetic-efficiency LED
InactiveCN104891967AImprove thickness control accuracyMaintain LED PerformanceQuantum efficiencyChemical composition
The invention relates to the field of LED transparent luminescent ceramics and discloses a method for preparing a green-light and transparent ceramic phosphor applied to a high-photosynthetic-efficiency LED. The transparent ceramic phosphor is prepared through the tape-casting and vacuum-sintering process and the chemical composition of the transparent ceramic phosphor is as follows: (x% of Ce, 100%-x% of Lu) 3Al5Ol2, wherein x is larger than or equal to 0.05, and smaller than or equal to 1. The prepared green-light and transparent ceramic phosphor is simple in structure and simplified in packaging process. When the green-light and transparent ceramic phosphor is applied to a white-light LED, the effects of high photosynthetic efficiency, high quantum efficiency and excellent temperature quenching property are realized.
Owner:苏州工业园区晶冠瓷材料科技有限公司
Roll force parameter self-learning method and device
ActiveCN108311544AImprove thickness control accuracyReduce biasRoll force/gap control deviceWeight coefficientStrip steel
The invention discloses a roll force parameter self-learning method and device for determining a roll force self-learning parameter adaptively according to attribute of strip steel and a real-time working condition and improving the rolling precision of the strip steel. The method comprises the following steps: acquiring an attribute parameter of to-be-rolled strip steel; determining a first weight coefficient of a rolling model corresponding to the to-be-rolled strip steel according to thickness, width and finish rolling temperature of the to-be-rolled strip steel; determining the hereditaryform of the to-be-rolled strip steel based on the first weight coefficient, heat number, flow number and rolling roller number of the to-be-rolled strip steel as well as time interval, with the prevision strip steel, of the to-be-rolled strip steel; if the hereditary form of the to-be-rolled strip steel is a short hereditary form, determining the roll force self-learning coefficient correspondingto the to-be-rolled strip steel with a self-learning strategy corresponding to the short hereditary form; and if the hereditary form of the to-be-rolled strip steel is a long hereditary form, determining the roll force self-learning coefficient corresponding to the to-be-rolled strip steel with a self-learning strategy corresponding to the long hereditary form.
Owner:SHOUGANG CORPORATION
Cold-rolled steel strip rolling method
InactiveCN103521519AImprove thickness control accuracyEliminates emulsion entrainmentWork treatment devicesMeasuring devicesEngineeringControl system
The invention relates to a cold-rolled steel strip rolling method. A straightening strip head of a straightening machine is arranged in the front of an original rolling-mill housing, a CPC alignment device is arranged on an uncoiler and enables strip materials to enter the rolling-mill housing in an aligned mode for rolling, a main rolling mill is a six-roller rolling mill, an upper middle roller and a lower middle roller of the main rolling mill have an axial horizontal moving function, an upper work roller and a lower work roller have positive and negative roller bending functions, the main rolling mill is additionally provided with an AGC hydraulic screw down control system, and the front portion and the rear portion of the main rolling mill are respectively provided with an X-ray thickness gauge, a vacuum oil removing device, an upper row of air knives and a lower row of air knives. Steel strip pickling undergoes uncoiling preparation, threading rolling, reversible rolling, finished product rolling and coil unloading for rolling of steel strips, the technical problems that work rollers need an original convexity degree, the diameters of the work rollers are difficult to reduce, roller rolling and bending can not be effectively achieved, storage amount of spare work rollers and roller consumption is increased are solved, and the thickness control precision and plate face cleanness are improved.
Owner:山东泰山轧钢有限公司
Overproof control method of thickness of head and tail of wide and thick plate mill
ActiveCN103252353ASolve the thickness tolerance of the head and tail of wide and thick platesHigh control precisionRoll force/gap control deviceMetal rolling arrangementsAutomatic controlAutomated control system
The invention relates to an overproof control method of the thickness of a head and a tail of a wide and thick plate mill. The overproof control method is achieved by adding an overproof control module which assists the thickness of the head in a wide and thick plate mill L1 thickness automatic control system. The method specifically comprises the steps that a head roll gap compensation factor coefficient modification submodule and a head roll gap direct modification submodule are additionally arranged in the plate mill L1 thickness automatic control system, modification is carried out on a head roll gap in the process of rolling a wide and thick plate, and the control accuracy of the thickness of the head and the tail of the wide and thick plate is greatly improved. By the adoption of the control method, the overproof total length of the thickness of the head and the tail is shortened, the total length is shortened from 1m to below 0.4m, and yield is increased by 1%.
Owner:INST OF RES OF IRON & STEEL JIANGSU PROVINCE
Preparation method of oxide ceramic coating layer on surface of silicon carbide fiber
InactiveCN104213099AGood lookingUniform and dense coatingChemical vapor deposition coatingOxide ceramicCarbide silicon
The invention discloses a preparation method of an oxide ceramic coating layer on a surface of a silicon carbide fiber. The preparation method comprises the following steps: (1) the silicon carbide fiber is removed glue for cleaning; (2) the silicon carbide fiber is put in an ALD reaction chamber to repeatedly vacuumize and replace nitrogen for three times; (3) a reaction precursor is selected according to the type of a deposited oxide coating layer; and the parameters of a deposition process are set; (4) precursor steam is guided in the ALD reaction chamber under the carrying of nitrogen or argon; (5) the reaction chamber is blown by the nitrogen or argon; (6) oxygen source steam is guided in the ALD reaction chamber under the carrying of the nitrogen or argon; (7) the reaction chamber is blown by the nitrogen or argon; (8) the steps (4)-(7) are repeated until the needed thickness of the coating layer is deposited; and (9) the coating layer is put in a high-temperature tube furnace, and is thermally treated under the nitrogen protection. The preparation method can be used for preparing the uniform and compact oxide ceramic coating layer with few impurities and precisely controlled thickness on the surface of the SiC fiber.
Owner:NAT UNIV OF DEFENSE TECH
Downstream roller replacing method achieving online roller replacing of ESP finish rolling unit
ActiveCN108405625AMeeting application accuracy requirementsGuaranteed stabilityMetal rolling stand detailsMetal rolling arrangementsPulp and paper industryRolling mill
The invention provides a downstream roller replacing method achieving online roller replacing of an ESP finish rolling unit, and the method is used for an online roller replacing device, provided withsix racks, of an ESP finish rolling unit. During normal rolling production, any five racks are put into operation, and one rack is an order-awaiting rack. According to the method, a downstream rollerreplacing strategy is adopted, the method includes the following steps that S1, collecting process, plate strip and rolling mill parameters are collected and input; S2, a roller of the order-awaitingrack Fj is downwards pressed, and the speed adjusting segment is performed; S3, the roller seam and roller speed adjusting segment of a transition rack Fj+1 and downstream racks is performed; and S4,a roller of a roller replacing rack Fi is lifted and the roller speed adjusting segment is performed. According to the controlled roller replacing method, the roller replacing efficiency and the stability of the roller replacing process can be improved, the product thickness control precision can be improved easily, and the industrial application precision requirement can be met.
Owner:YANSHAN UNIV
Rolling pressure setting method of precision rolling phase-change strip steel
ActiveCN102641902AImprove setting accuracyImprove thickness control accuracyRoll force/gap control deviceDouble phaseVolume fraction
The invention discloses a rolling pressure setting method of precision rolling phase-change strip steel; and a formula for calculating the impact of temperature on deformation strength is set up by considering the volume fraction of rolled piece austenitic deformation and ferrite deformation, so that the rolling pressure setting precision of phase-change strip steel in a two-phase area and a ferrite area is significantly improved, and the purposes of improving the strip steel thickness control precision and production stability are achieved. According to the technical scheme, because a phase-change volume fraction calculation model in a cosine form and a deformation strength impact calculation formula in a weighted form are adopted in the double-phase area, the deformation characteristic of a rolled piece in the double-phase area can be better simulated, so that the matching with an actual rolling result is very high.
Owner:BAOSHAN IRON & STEEL CO LTD
Online control system capable of improving rolled piece thickness control precision
ActiveCN106984651AImprove thickness control accuracyEliminate ThicknessRoll mill control devicesMetal rolling arrangementsControl systemMachining
The invention provides an online control system capable of improving the rolled piece thickness control precision. According to the system, a rolling mill rack inlet side rolled piece temperature measuring device and a rolling mill outlet side rolled piece thickness measuring device are used for carrying out compensation calculation on a roller gap in real time, specifically, according to measured data of the rolled piece temperature measuring device and the rolled piece thickness measuring device, the influence coefficient of the rolled piece plastic machining temperature relative to the rolled piece thickness changes is calculated, and therefore the increasing and decreasing value, generated by temperature changes of a rolled piece, of the rolling mill outlet side rolled piece thickness is calculated; meanwhile, the material physical property correction value is used for compensating for the influence of the machining temperature on the rolled piece physical property, and through the roller gap deviation calculation result, the roller gap is subject to real-time compensation control; the problem that due to rolled piece plastic machining temperature unevenness, the thickness control precision is poor is solved, and the thickness control precision of different thickness specifications can be improved by 2% or above.
Owner:INST OF RES OF IRON & STEEL JIANGSU PROVINCE
Dynamic specification change method for cold-rolled thin strip
ActiveCN105880296APrevents "heart-shaped" volume defectsReduce manual interventionRoll mill control devicesMetal rolling arrangementsEngineeringTime dynamics
Owner:PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
Compensation method for measured thickness of zinc aluminized layer
InactiveCN105486252AReduce measurement thickness deviationImprove thickness control accuracyUsing wave/particle radiation meansPass rateAluminium
A compensation method for measured thickness of a zinc aluminized layer includes the following steps of: firstly determining a compensation coefficient, obtaining the compensation coefficient through formula transformation and condition setting according to the thickness gauge measured thickness and the actual thickness of a zinc aluminized sheet; secondly determining a compensation coefficient value according to a measured specific value of [mu]u2 / [mu]u1 of a pure aluminium zinc sample sheet and a found specific value of [mu]u3 / [mu]u1; and finally modifying a first-level computer zinc aluminized layer measured thickness compensation program, and multiplying a d2 of an original zinc aluminized layer measured thickness compensation program by the compensation coefficient value to achieve automatic compensation of the measured thickness of the zinc aluminized layer, wherein the measured thickness is more close to the actual thickness. The method can effectively decrease a thickness gauge measured thickness deviation, and greatly improve the thickness control accuracy of the zinc aluminized sheet, so that the quality pass rate of the zinc aluminized sheet can be increased to 99.6% from 76.4%.
Owner:ANGANG STEEL CO LTD
Method for improving preset precision of rolling force of Sendzimir rolling mills in unstable-state rolling phases
ActiveCN105750336AImprove thickness control accuracyImprove preset calculation accuracyRoll force/gap control deviceStrip steelMaterials science
The invention discloses a method for improving the preset precision of rolling force of Sendzimir rolling mills in unstable-state rolling phases. The method is characterized by comprising steps of compiling rolling models for computing the rolling force; correcting and optimizing friction coefficient models in the rolling models by the aid of model self-learning processes; iteratively computing friction coefficients of unstable-state phases of each previous pass by the aid of measured data and using the friction coefficients as friction coefficients of unstable-state phases of each next pass for computing preset values of the rolling force of the next pass. The method has the advantages that the preset computational precision of the rolling force can be greatly improved on the basis of improving the friction coefficient models, the mean relative deviation between the unstable-state preset rolling force and measured rolling force is 4.63%, the probability of relative deviation lower than 10% is 96.94%, accordingly, the thickness control precision of band steel can be effectively improved, the quality of products can be improved, and the method has important application value on improving the preset precision of the rolling force of the Sendzimir rolling mills in the unstable-state rolling phases during actual production.
Owner:NINGBO BAOXIN STAINLESS STEEL
Method for monitoring film thickness of optical filter
ActiveCN1862297AHigh control precisionSmall amount of calculationOptical filtersSpecial data processing applicationsPhysicsTransmittance
The present invention discloses a monitoring method of optical filter film thickness. Said method includes the following steps: firstly, calculating spectral curve of every monitoring film using central wavelength lambda O as monitoring wavelength; calculating series spectral curve using out-of-centre wavelength as monitoring wavelength; then using conventional extreme indirect monitoring method to plate optical film on substrate; testing the spectral curve of plated filter; comparing the tested spectral curve with analogously-calculated spectral curves to find out most similar spectral curve in the calculated spectral curves, regulating monitoring wavelength and preparing new filter again, repeating the above-mentioned steps until the waveform and transmittance or reflectance indexes spectral curve of filter are reached to indexes of designed requirements.
Owner:上海欧菲尔光电技术有限公司 +1
Rolling method used for rolling strip steel of reversible mill
InactiveCN102389897AHigh control precisionShorten the out-of-tolerance lengthRoll mill control devicesMetal rolling arrangementsAutomatic controlRolling speed
The invention discloses a rolling method used for rolling strip steel of a reversible mill, which can shorten the length of the worse parts of the thicknesses of the strip steel head and tail and improve the yield rate. Four stages of starting, accelerating, normal rolling as well as decelerating and stopping are comprised in each rolling path; at the beginning of each rolling pass, the automatic control function of the reversible mill is firstly closed and then the reversible mill is started to roll at a minimum rolling speed designed for the reversible mill; when the reversible mill is regulated and pressed down manually, the thickness deviation of the rolled strip steel is cotrolled in the reasonable range, then the automatic control function of the reversible mill is opened, the reversible mill is accelerated to the normal rolling speed to roll. As the manual and automatic operations are combined, the control precision of the thickness of the strip steel head is improved, the length of the worse part of the thicknesses of the strip steel head is shortened, the product yield rate is improved, and the rolling method is mainly suitable for the reversible mill.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Zinc coating thickness control method and system based on time-varying delay deviation correction technology
ActiveCN105316613AAccurate lag timeAvoid production fluctuationsHot-dipping/immersion processesData modelingPass rate
The invention provides a zinc coating thickness control method and system based on a time-varying delay deviation correction technology. Firstly, a data modeling method is adopted to model the coating thickness, the influences of production line speed, air knife pressure, knife distances, height and other factors on the coating thickness are predicted, and feedback control is conducted on controlled quantity according to a model predicted value to eliminate the influence of external disturbance on the coating thickness. Meanwhile, according to the characteristics of the galvanization production process, the delay time of measurement of a thickness gauge is accurately calculated, and based on the delay time, the current model predicted value is corrected by adopting a thickness gauge measured value and model predicted value information which are matched with each other to effectively solve the problem that feedback of measurement information is delayed due to large system time variation. In addition, the difference value between discrete inspection test analytical data and an online thickness gauge thickness measured value is introduced to correct a set value of a control objective of the coating thickness, and steady state residual errors of closed-loop control are reduced. The objectives that fluctuation of coating thickness is reduced, the control precision and the pass percent are improved, and excessive zinc consumption is reduced are achieved.
Owner:ZHEJIANG SUPCON RES
Rectangular linear variable optical filter manufacturing method and device
The invention relates to a rectangular linear variable optical filter manufacturing method and device. According to the rectangular linear variable optical filter manufacturing method and device, a glass base material used for making an optical filter is fixed on a lower surface of a round plate-shaped work piece disc that can rotate around a central shaft of the work piece disc, a plating face of the glass base material faces downwards, an evaporation source base plate and an evaporation source positioned on an upper surface of the evaporation source base plate are arranged below the work piece disc, and the plating face of the glass base material is subjected to plating operation with a membrane material evaporated via the evaporation source when the work piece disc drives the glass base material to rotate. The rectangular linear variable optical filter manufacturing method and device can help overcome defects of complicated production processes and low precision and poor quality of manufactured rectangular linear variable optical filters in conventional rectangular linear variable optical filter manufacturing processes because a corrected piece which is adjusted via manual work for many times is adopted. The rectangular linear variable optical filter manufacturing method and device are advantaged by greatly reduction of membrane thickness correcting processes, saved trial-plating time, and improved precision and quality stability of the rectangular linear variable optical filter.
Owner:SANMING FOCTEK PHOTONICS INC
Preparation method of X-ray multilayer film reflector
InactiveCN111575678AImprove reflectivityQuality improvementHandling using diffraction/refraction/reflectionChemical vapor deposition coatingMultilayer membraneWavelength
The invention provides a preparation method of an X-ray multilayer film reflector, and belongs to the technical field of multilayer film reflectors. The method comprises the following steps of firstly, determining the periodic thickness of an X-ray multilayer film according to the wavelength and the incident angle of X-rays; then determining the thickness and the periodic number of the multilayerfilm; and conducting alternately depositing on the surface of a substrate by using an atomic layer deposition method to prepare the X-ray multilayer film reflector. According to the preparation method, the periodic thickness of the X-ray multilayer film is small, the X-ray multilayer film reflector with shorter wavelength can be prepared, in addition, the roughness of the prepared multilayer filmis small (which is less than or equal to the roughness of the substrate), the interface among films is clear, and the reflectivity of the multilayer film reflector is high.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Steel plate thickness controlling method and device
ActiveCN110252826AImprove thickness control accuracyRoll mill control devicesMetal rolling arrangementsHysteresisSheet steel
The invention discloses a steel plate thickness controlling method and device. The steel plate thickness controlling method comprises the steps that the roll gap correction amount is determined according to steel plate outlet thickness deviation; the roll gap correction amount and an output of a second simulator are superposed to be used as output of a feedback AGC and input of a first simulator, and the output of the first simulator is used as input of the second simulator, wherein the first simulator is used for simulating the roll gap position ring characteristic, and the second simulator is used for simulating the hysteresis characteristic that strip steel moves to the position below a thickness gauge from a rolling mill; according to the feedback AGC output, steel plate thickness control is conducted. The steel plate thickness controlling method and device solve the influence of measurement hysteresis of the thickness gauge on a thickness control algorithm, and the thickness control precision is improved.
Owner:MCC CAPITAL ENGINEERING & RESEARCH +1
Composite aluminum material for PTC and manufacturing method thereof
InactiveCN112048643AReduce consumptionExtended service lifeAuxillary arrangementsMetal rolling arrangementsAluminum foilUltimate tensile strength
The invention belongs to the technical field of aluminum foil calendering manufacturing and discloses a composite aluminum material for PTC and a manufacturing method thereof. The composite aluminum material for PTC comprises a core layer and a brazing layer, the core layer and the brazing layer form a composite structure through rolling, the brazing layer is made of AA4004 aluminum alloy, and thecore layer is made of AA3003 aluminum alloy. The core layer is prepared through cast rolling and cold rolling, the brazing layer alloy is prepared through casting, hot rolling and cold rolling, and the composite aluminum material for the PTC is obtained after the core layer and the brazing layer are compounded through cold rolling. The aluminum foil prepared through the manufacturing method has high postweld strength and good corrosion resistance after high-temperature welding, the performance requirement of PTC for composite aluminum materials can be met, the manufacturing method is controllable in process, good in repeatability and easy to master, the industry development requirement can be met, and formation of intermetallic brittle compounds can be avoided.
Owner:JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
Control method of cooling liquid for cold rolling strip steel
InactiveCN100363122CReduce thickness fluctuationImprove thickness control accuracyTemperature control deviceCooling fluidStreamflow
The control method of cooling liquid for cold rolling strip steel includes: for the process computer to calculate the cooling liquid flow rate under the rated speed based on the friction and heat conductance in cold rolling; for the process computer to down send the cooling liquid flow rate during rolling; for the PLC to match based on the cooling liquid flow rate and the rolling speed and to apply the matched flow rate as the given value for controlling the valve; and for the PLC to calculate the control degree and opening of the valve, with the control degree being calculated based on the mathematical model. The present invention compensates the effect of pipeline, nozzle and other factors by means of the mathematical model to obtain the practical flow rate value and can raise the control precision of strip steel thickness.
Owner:ANGANG STEEL CO LTD
Strip steel coiling thickness control method and device
ActiveCN110052507AImprove the problem of thinning thicknessImprove thickness control accuracyStrip steelTower
The embodiment of the invention provides a strip steel coiling thickness control method and a strip steel coiling thickness control device. The method comprises the following steps: acquiring a targetcoiling temperature and a set thickness for performing strip steel coiling in a finish rolling two-stage model, and the actual thickness and the actual velocity of the strip steel acquired by detecting the strip steel in a strip steel coiling process; establishing a first influence relationship among the actual velocity, a first velocity of a clamping roller, a second velocity of a mandrel and the tension of the strip steel according to the actual velocity; establishing a second influence relationship between the tension of the strip steel and thickness deviation according to the set thickness, the actual thickness, the target coiling temperature and the first influence relationship; and setting a constraint condition for the first influence relationship and the second influence relationship to acquire optimized values of the first velocity and the second velocity, and applying the optimized first velocity and the optimized second velocity to strip steel coiling production. Accordingto the strip steel coiling thickness control method and the strip steel coiling thickness control device, the problem that the thickness of the strip steel is thinned in a hot rolling coiling processis solved, the thickness control precision of the strip steel is improved, and the problems about product quality of tower shape, coil collapse and the like of a steel coil are eliminated.
Owner:SHOUGANG CORPORATION
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