720results about "Roll force/gap control device" patented technology

This invention discloses a process for controlling the shape of A514GrQ extra-thick plates for offshore platforms. It uses 800-1000mm thick steel ingots, and after removing and cleaning the ingot risers, ensures uniform thickness of the ingot body, laying the foundation for obtaining steel plates with excellent flatness. The heating process is optimized to ensure uniform heating of the ingot head, middle, and tail, facilitating uniform deformation during rolling. Homogenized rolling is employed to reduce cooling water usage, limit the reduction per pass, and control the final rolling temperature, avoiding uneven internal stress and shape rebound in the steel plate. The final product is a 180-210mm thick steel plate with a maximum flatness ≤8mm and a lateral flatness ≤4mm within a length of 10000mm and a width of 2400mm, significantly reducing subsequent leveling tasks.

The invention discloses a high-precision same-turning roller adjusting mechanism and a pre-stressed rolling mill. The two racks are symmetrically arranged; bearing seat adjusting devices are installed on the portions, corresponding to the two sides of the upper bearing seat, of each rack, and two second-stage worm and gear reduction gearboxes are arranged on the portions, corresponding to the upper bearing seat adjusting devices, of the top of each rack. A first-stage worm and gear reduction gearbox is arranged between the two second-stage worm and gear reduction gearboxes of each rack; worms of the two primary worm and gear reduction gearboxes are connected together through a connecting assembly and used for being connected with a driving device. The two axial sides of a worm wheel of each first-stage worm and gear reduction gearbox extend out to be coaxial with a worm of the corresponding second-stage worm and gear reduction gearbox. And a worm gear of each secondary worm and gear reduction gearbox is in transmission connection with the bearing seat adjusting device. Compared with a straight gear pair, a helical gear pair and the like, the two stages of worm and gear pair transmission mechanisms are arranged, so that the speed ratio is greatly increased, and the adjusting precision of the roller is improved.

The invention relates to the technical field of metal processing, in particular to a method for producing ultra-thin and ultra-wide limit specification engineering structure steel through a wide and thick plate mill, the method comprises the steps of casting blank heating, rolling, hot straightening and air cooling to the room temperature, in the casting blank heating process, when the casting blank is heated to 1235-1260 DEG C and the gas pressure of a header pipe is 7-9 KPa, the steel tapping rhythm is increased to be larger than or equal to 180 s, and the steel tapping rhythm is increased to be larger than or equal to 180 s; the soaking time and the heating time are 4-4.5 hours, and the total in-furnace time is 5-6.5 hours; when the gas pressure of a main pipe is less than 7KPa, the tapping rhythm is increased to be more than or equal to 230s, the soaking section and heating time is 4.5-5h, the total in-furnace time is 5.5-7h, and the steel billet tapping temperature is more than or equal to 1230 DEG C; the air-fuel ratio is regulated between 1.7 and 2.3, and the temperature difference between the upper surface and the lower surface of the blank is within 15 DEG C; the wide and thick plate rolling mill is used for producing the steel for the engineering structure with the thickness specification of 4-6 mm and the width larger than 3500 mm, and the problems that the steel plate is thin in rolled piece and rapid in temperature reduction, waves are prone to occurring in the production process, the thickness is uneven, and the one-time passing rate and the waste reduction rate of the steel plate are affected are solved.

The invention discloses a V-B-Ti microalloyed 690 MPa grade steel for engineering machinery, and belongs to the field of metal processing. The steel comprises the following chemical components in percentage by weight: 0.13%-0.17% of C, 0.15%-0.25% of Si, 1.55%-1.7% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 0.017%-0.0250% of Ti, 0.1%-0.2% of Cr, 0.015%-0.045% of Als, 0.05%-0.08% of V, 0.0015%-0.0020% of B, 0.005%-0.0095% of N, 3.4%-3.8% of Ti / N and the balance of Fe and inevitable impurities, the total amount of other impurity elements is less than 0.05%, and the problems of low steel plate toughness and plate shape unevenness are solved.

The invention provides a finite difference-based rapid calculation method and system for an electromagnetic regulation and control roller shape and a rolling condition optimization method and system, and belongs to the field of rolling control. The roller shape rapid calculation method comprises the steps that size parameters, an electromagnetic rod loading form, a regulation mode, regulation parameters and rolling working condition environment parameters of an electromagnetic regulation roller to be regulated are obtained, a geometric model of the electromagnetic regulation roller is established, and the electromagnetic rod loading form, the regulation mode, the regulation parameters and the rolling working condition environment parameters are set in the geometric model; grid division is conducted on the geometric model of the roller, the finite difference theory is introduced, an electromagnetic regulation and control roller shape rapid calculation model is constructed, and temperature field distribution is rapidly solved and calculated through an LU decomposition method; and the roller shape is calculated according to the electromagnetic regulation and control roller shape rapid calculation model and the temperature field distribution. According to the method, online dynamic regulation and control of the electromagnetic regulation and control roller shape under parameter optimization is achieved, and the real-time performance and accuracy of the electromagnetic regulation and control roller shape are improved.

The invention discloses a quick-response high-precision pre-stress rolling mill and a control method. The device at least comprises two frame type racks which are symmetrically arranged; a pre-stress cylinder is arranged on an upper beam of each frame type rack, and a driving shaft of each pre-stress cylinder downwards extends out of the upper beam and is positioned below the upper beam; upper bearing seat adjusting devices are mounted on the two sides of the prestress cylinder; an upper bearing seat is mounted between the upper bearing seat adjusting devices on the two sides; a driving shaft of the pre-stress cylinder is connected with the upper bearing seat and is used for providing pre-stress for the upper bearing seat; an adjusting hydraulic cylinder is arranged on a lower beam of each frame type rack, and a driving shaft of each adjusting hydraulic cylinder upwards extends out of the corresponding upper beam and is located above the corresponding lower beam; a lower bearing seat is arranged in the frame type rack below the upper bearing seat in a sliding manner; and a driving shaft of the adjusting hydraulic cylinder is connected with the lower bearing seat. The rolling precision is high, and the adjustment requirement of the rolling mill roll gap can be met through rapid and accurate adjustment of the lower bearing seat on line.

The invention discloses a roll bearing seat flexible connecting device, a quick-response high-precision pre-stress rolling mill and a control method. Comprising a frame type rack, and a roller bearing seat is arranged in the rack; a double-piston-rod hydraulic cylinder is arranged on an upper beam and / or a lower beam of the frame type rack; a connecting rod penetrates through a piston rod of the hydraulic cylinder; a concave-convex combined spherical pad sleeves one end, close to the bearing seat, of the connecting rod; the concave spherical pad is positioned on one side far away from the bearing seat, and the convex spherical pad is positioned on one side close to the bearing seat; the lower end of the connecting rod penetrates through the concave-convex combined spherical pad and the base to be connected to the roller bearing seat. The convex spherical pad can twist along with the bearing seat; the end, far away from the bearing seat, of the connecting rod extends upwards out of the rack and is in threaded connection with a nut, and the connecting rod between the nut and the rack is sleeved with a spring. According to the device, the combined spherical pad is arranged between the hydraulic cylinder and the bearing seat, so that the hydraulic cylinder and the bearing seat are flexibly connected, and the effect of protecting the hydraulic cylinder is achieved.

The invention discloses V-N-B microalloyed 550MPa-grade steel for engineering machinery and a preparation method of the V-N-B microalloyed 550MPa-grade steel, and belongs to the technical field of low-carbon microalloyed steel production. The steel comprises the following components in percentage by weight: 0.06%-0.15% of C, 0.2%-0.35% of Si, 1.35%-1.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 0.01%-0.03% of Nb, 0.015%-0.0250% of Ti, 0.15%-0.25% of Cr, 0.015%-0.045% of Als, 0.05%-0.08% of V, 0.0012%-0.0020% of B, 0.01%-0.025% of N, 0.005%-0.010% of Ca and the balance of Fe and inevitable impurities, the total amount of other impurity elements is less than 0.05%, and the problems of low toughness and plate shape unevenness are solved.

The invention provides a cold-rolling mill rolling force prediction and self-adaptive control method based on multi-sensor fusion, and relates to the technical field of cold-rolling mill control, and the method comprises the steps: collecting sensor technological parameters, constructing a parameter incidence matrix through a graph attention network, reconstructing a working condition feature sequence, and predicting rolling force in combination with deformation area contact arc length change characteristics. And a control strategy is constructed based on the rolling force error value, control parameters are optimized, optimal process parameters are searched in a parameter optimization space in combination with constraint conditions and are converted into control instructions, the rolling force prediction accuracy and control precision can be improved, and the anti-interference capability of the system is enhanced.

The invention relates to the field of steel rolling control, in particular to a cold continuous rolling high-pressure large-flow hydraulic energy-saving control method and system.The method comprises the steps that rolling system parameters and real-time data are collected and preprocessed, and basic data used for pressure regulation and control are obtained; carrying out model coupling analysis on the steel coil process parameters to obtain adaptive rolling pressure data; non-linear fusion evaluation is carried out on acceleration and thickness disturbance, and a self-adaptive dynamic safety margin is obtained; performing real-time synthesis on the adaptive rolling pressure data and the adaptive dynamic safety allowance to obtain dynamic target pressure setting data; and closed-loop energy-saving control is performed based on the dynamic target pressure setting data, so that the energy-saving effect of the hydraulic system is improved.

The invention discloses an efficient and low-cost high-strength steel plate for a 1300MPa-grade low-temperature engineering structure and a manufacturing method of the high-strength steel plate, and belongs to the technical field of low-carbon microalloyed steel production. Optimized steelmaking, heating, rolling, pre-straightening, relaxation, controlled cooling, hot straightening and tempering processes are adopted, an ultra-fast cooling and laminar cooling mode is adopted for controlled cooling, chemical components of the steel plate contain Ce, and finally the problems that the 1300MPa-level hot-rolled steel plate with the thickness of 10-50 mm produced through an online cooling process is low in toughness, high in yield ratio, low in flaw detection qualification rate and uneven in plate shape are solved.

The invention relates to the technical field of high-speed cable shielding materials, and discloses a manufacturing method of rolled copper foil for high-speed cable shielding. The method comprises the following steps: preparing a copper plate; performing multi-pass cold rolling on the copper plate to form an elongated grain structure oriented along the rolling direction; performing controlled annealing on the cold-rolled copper foil to recover plasticity and inhibit complete recrystallization; the target thickness is obtained through finish rolling; carrying out finishing rolling on at least one surface of the copper foil by adopting a mirror surface working roller so as to reduce the surface roughness; and performing surface smoothing or passivating treatment to inhibit oxidation and performance degradation. Therefore, the obtained rolled copper foil has good ductility, structural stability and high-frequency performance.

The invention provides a rolling pass parameter intelligent inversion and dynamic correction method based on machine learning, and the method comprises the steps: outputting a deformation resistance Kf value according to the obtained current rolling temperature and strain rate; based on the deformation resistance Kf value, predicted values of the total rolling force and the rolling moment are obtained; establishing a transient heat balance equation, and outputting a final rolling temperature predicted value; by taking the minimization of the pass number and production time and the minimization of the total energy consumption as targets, an optimal rolling schedule is generated and decided; and the corresponding model parameters are optimized in batches by regularly utilizing historical data, so that short-term self-adaption and long-term optimization control of the rolling process is realized. According to the method, various feasible rolling schemes are automatically generated by utilizing an optimization algorithm, so that an operator can select the optimal scheme according to actual conditions; by comparing a predicted value with an actual value in real time, current model parameters are quickly adjusted, and accumulated production data are regularly utilized to comprehensively optimize the model, so that long-term stable operation and accurate prediction of the system are ensured.

The invention relates to the technical field of extra-thick maritime work steel resistant to tropical marine climate corrosion, in particular to EH40 extra-thick maritime work steel resistant to tropical marine climate corrosion and a manufacturing method of the EH40 extra-thick maritime work steel resistant to tropical marine climate corrosion. The high-strength steel is composed of the following chemical components in percentage by weight: 0.065%-0.08% of C, 0.15%-0.3% of Si, 1.5%-1.7% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.015%-0.03% of Als, 0.4%-0.8% of Ni, 0.1%-0.2% of Cu, 0.1%-0.15% of Co, 0.05%-0.15% of Sn, 0.01%-0.03% of V, 0.01%-0.015% of Ti, 0.002%-0.004% of N and the balance of Fe and inevitable impurities. The thickness of the finished steel plate can reach 100 mm, and the corrosion resistance of the steel plate in the tropical marine climate environment is remarkably improved while EH40-grade high strength, high toughness and excellent weldability are kept.

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

The invention relates to the technical field of steel industry, and discloses a multi-specification self-adaptive temperature control rolling process in a bar rolling process, which comprises the following steps: S1, a blank pretreatment stage, S2, an intelligent heating stage, S3, a high-pressure water descaling stage, S4, a multi-pass rolling stage, S5, on-line size monitoring, S6, a post-rolling controlled cooling stage and S7, a finishing stage. The production change time is shortened, on the basis of a specification-temperature-roll gap correlation model, automatic matching of phi 20-100 mm full-specification parameters is achieved, the production change time is shortened to be within 15 minutes (reduced by 60% or above compared with a traditional process), automatic switching of equipment parameters such as an MES system correlation rolling plan, a water cooling box and descaling pressure is achieved, manual adjustment errors are avoided, the multi-specification production qualification rate is increased to 99.5%, and the production efficiency is improved. According to the scheme, the temperature control precision is improved, the product performance is optimized, the three-section temperature of the heating furnace is controlled through the fuzzy PID algorithm, and the bearing steel heating temperature equalization time is shortened by 30%.

The invention belongs to the technical field of metallurgy, and discloses an economical large-thickness steel plate and a manufacturing method thereof. The steel plate is formed by smelting the following components in percentage by mass: 0.10%-0.16% of C, 0.15%-0.45% of Si, 1.30%-1.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.001% of S and the like, and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of primary smelting, refining, continuous steel casting, heating and controlled rolling. According to the method, the high-compactness continuous casting slab refining and continuous casting technology is combined with the controlled rolling technology with microalloy carbonitride point enrichment nucleation as the core, a grain refined mixed structure is obtained, the problems that the compression ratio is low and grains are coarse when a large-thickness steel plate is produced through a continuous casting slab are solved, the thickness of the produced steel plate reaches 100-150 mm, and the yield of the steel plate is improved. The internal quality, strength and low-temperature toughness are excellent, and the continuous casting billet is produced by controlling rolling, so that the economical efficiency is good.

The invention belongs to the field of profile steel production, and particularly relates to a rolling method of hot-rolled Q450NQR1 weather-resistant H profile steel, which adopts a reversible cogging mill and a universal finishing mill group for rolling: after the cogging mill rolls for 3-5 passes for cogging, a universal continuous rolling mill is adopted for finish rolling 9 continuous rolling, and the arrangement sequence of finish rolling hole patterns is U1-U2-U3-E4-U5-U6-U7-E8-U9; wherein the U3 and the U6 are curved web hole patterns, and the vertical roll is in drum-shaped design. The method has the advantages that one BD cogging mill is used for large-rolling-reduction rolling to crush crystal grains, and then the nine-rack universal continuous rolling mill is used for finish rolling, so that the metal flowing and steel biting conditions are improved. The grain structure is refined through large rolling reduction and low-temperature rolling, the problems that the Q450NQR1 weathering resistant steel is poor in metal fluidity, prone to cracking and the like due to alloy elements are effectively solved, and meanwhile the mechanical property, the size precision and the surface quality of products are guaranteed.

The invention relates to the technical field of coated steel plate production, in particular to a high-straightness coated steel plate and a production method thereof. During production, the following processes are controlled: 1) finishing, namely determining finishing inlet tension T1, finishing outlet tension T2 and finishing rolling force F according to the thickness h and yield strength sigma s of strip steel, and ensuring that a tensile stress value formed by a tension roller is greater than a pressure stress value formed by the rolling force; and 2) coiling: adopting double coiling mechanisms to ensure that the strip steel does not generate longitudinal warping when the strip steel passes through a second turning roller and is coiled. Based on the forming mechanism of the plate shape defect, stable control over the plate shape of the coated steel plate finished product is achieved by improving the finishing parameter adaptation degree and improving the coiling equipment and technology, and great significance is achieved for improving the straightness of the coated steel plate finished product and improving the production efficiency and product competitiveness of the coated steel plate.

The invention discloses a modification method for improving oxidation resistance of a high-entropy alloy. The modification method comprises the following steps: S1, carrying out solution treatment and oil cooling on an as-cast high-entropy alloy; s2, the high-entropy alloy subjected to oil cooling is cut, surface oxide skin is removed, and a metal sample is obtained; and S3, the metal sample is subjected to large-deformation cold rolling treatment. According to the method, dendritic structures in the as-cast alloy are eliminated through solution treatment, then the solid-solution-state high-entropy alloy is subjected to multi-pass rolling, the total deformation is 60%-90%, and the oxidation resistance of the high-entropy alloy can be greatly improved. The method is reasonable in design and easy to operate, and the oxidation resistance of the high-entropy alloy is well improved.

The invention discloses a preparation method of a heterostructure high-performance metastable beta titanium alloy capable of inducing a deformation mechanism in a multilevel and sequential mode, and belongs to the technical field of metal materials. The method comprises the following steps: firstly, carrying out hot rolling in a beta single-phase region to prepare a blank and crushing coarse grains; substructures such as twin crystals and martensite are introduced through cold rolling; and through short-time annealing in a beta single-phase region, a multi-stage heterogeneous lamellar structure composed of thick equiaxed crystal grains, deformation recovery crystal grains and fine recrystallized crystal grains in an alternating manner is successfully constructed. The characteristic that twin crystals and martensite induce different stresses under different grain sizes is utilized, during deformation, thick equiaxed grains firstly start a deformation mechanism, and then fine recrystallized grains are activated; and in the later period of plastic deformation, the interior of the primary deformation strip further triggers a secondary deformation mechanism. The unique behavior of'grading-time sequence 'activation of a multi-deformation mechanism along with the increase of the dependent variable enables the metastable beta titanium alloy to keep excellent plasticity, and meanwhile, the work hardening rate is remarkably improved.

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 relates to the technical field of Bauschinger effect resistant maritime work steel plates, in particular to a Bauschinger effect resistant FH47 maritime work steel plate and a manufacturing method thereof. A Ni-Cu-Sn-Nb-V multi-component microalloying component system is combined with a casting machine under heavy pressure, multi-directional forging, multi-stage gradient heating and two-stage controlled rolling and controlled cooling process, and the high-performance maritime work steel plate with the excellent Bauschinger effect resistance is developed. The yield strength attenuation rate of the steel plate under the condition of 2% residual strain is smaller than or equal to 15%, the Bauschinger effect is excellent, the uniform elongation is larger than or equal to 10%, and the comprehensive mechanical property is remarkably improved. After controlled cooling treatment, the yield strength of the steel plate is larger than or equal to 460 MPa, the tensile strength is 540-720 MPa, the ductility is larger than or equal to 26%, and the transverse Charpy impact energy of the core at the temperature of-60 DEG C is larger than or equal to 150 J.

The invention discloses a quenching plate shape control method and device, components of a target steel plate are designed, and the components meet the product requirements of the target steel plate and the preset SA517Gr.F steel plate component requirements; the target steel plate is heated, the heating temperature ranges from 1180 DEG C to 1230 DEG C, and the in-furnace time of the target steel plate ranges from 1 m i n / mm to 1.5 m i n / mm; rolling plate shape control parameters are obtained and used for controlling a rolling roller to roll the target steel plate; carrying out unevenness detection on the rolled target steel plate; and according to the unevenness detection result of the target steel plate, quenching parameters and tempering parameters are determined and used for conducting quenching treatment and tempering treatment on the target steel plate. Thus, by optimizing the component design, controlling the rolling thickness, controlling the plate shape and regulating and controlling the quenching parameters and the tempering parameters, the plate shape unevenness of the quenched target steel plate reaches the expected range, the plate shape control of the ultimate thin specification plate is greatly improved, and homogenization of microstructures at different positions is achieved.

The application discloses a kind of automobile structure steel with yield strength 1000MPa and above and its manufacturing method, its component weight percentage is as follows: C 0.15~0.23%;Si 0.12~0.5%;Mn 1.6~2.4%;B 0.001~0.004%;Al 0.01~0.04%;Cr;0.05~0.5%;Mo 0.15~0.5%;P≤0.015%;S≤0.005%;Rest contains Fe and other inevitable impurities, and need to satisfy the following relationship: the eigenvalue Bs of lower bainite formation rate=0.6~1.4, Bs=(Mo+B*100-Mn / 5) / C;Its microstructure lower bainite≥95%.The automobile structure steel of the application has yield strength≥1000MPa, tensile strength≥1180MPa, elongation≥7%, 180° bending performance d≤3.5T.The automobile structure steel obtained by the application not only has ultrahigh strength, but also has excellent forming performance, especially bending forming performance, and is especially suitable for manufacturing automobile chassis system parts.

The invention relates to metal rolling equipment for aluminum plate machining, and belongs to the technical field of rolling machining. The metal rolling equipment comprises a horizontal roller and vertical rollers, and the vertical rollers are arranged on the two sides of the horizontal roller; the hydraulic cylinder is connected with the horizontal roller and used for adjusting stress of the horizontal roller. The vertical shaft is in sliding connection with the sleeve; the ends of the vertical shaft and the sleeve are located above and below the plate correspondingly, and the plate makes contact with the end of the vertical shaft or the end of the sleeve after moving in the vertical direction. The slide rheostat is arranged at the other ends of the vertical shaft and the sleeve; the slide rheostat is connected with the hydraulic cylinder. The device has the effect of automatically adjusting the bounce of the horizontal roller according to the plate thickness.

The present application relates to the technical field of super-thick marine steel resistant to corrosion in tropical marine climate, in particular to an EH40 super-thick marine steel resistant to corrosion in tropical marine climate and a manufacturing method thereof. The steel is composed of the following chemical components by weight percentage: C: 0.065%-0.08%, Si: 0.15%-0.3%, Mn: 1.5%-1.7%, P≤0.02%, S≤0.01%, Als: 0.015%-0.03%, Ni: 0.4%-0.8%, Cu: 0.1%-0.2%, Co: 0.1%-0.15%, Sn: 0.05%-0.15%, V: 0.01%-0.03%, Ti: 0.01%-0.015%, N: 0.002%-0.004%, and the rest is Fe and inevitable impurities. The thickness of the finished steel plate can reach 100 mm, while maintaining the high strength, high toughness and excellent weldability of the EH40 grade, the corrosion resistance of the steel in the tropical marine climate environment is significantly improved.

This invention provides a method for preparing titanium anode substrates for electrolytic copper foil. The specific steps are: Step 1, preparing titanium anode substrate ingots through two melting processes; Step 2, forging the prepared titanium anode substrate; Step 3, rolling the forged titanium anode substrate. The specific effects of this invention are: the titanium anode substrate prepared by the above method for preparing titanium anode substrates for electrolytic copper foil exhibits significantly improved microstructure and properties, and the enhanced lifespan of titanium anodes produced using this process is significantly increased. This process is relatively simple to operate, requires minimal equipment, and reduces the production cost of titanium anode substrates. It also increases the practical application and operability of this process.

The invention relates to rare earth steel for a 355MPa-grade hull structure and a preparation method of the rare earth steel, belongs to the technical field of metal materials, and solves the problems that the existing steel for the 355MPa-grade hull structure is poor in comprehensive performance and cannot meet the service requirements of high-end ships. The steel comprises the following chemical components in percentage by weight: 0.10%-0.15% of C, 0.20%-0.50% of Si, 0.70%-1.00% of Mn, 0.03%-0.10% of V, 0.10%-0.30% of Cu, 0.04%-0.08% of Mo, 0.10%-0.20% of Cr, 0.30%-0.40% of Ni, 0.003%-0.01% of Ce, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than or equal to 0.003% of O and the balance of iron and inevitable impurities. The prepared 355MPa-grade rare earth steel for the hull structure has obdurability and corrosion resistance at the same time.

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