338results about "Roll speed control device" patented technology

The invention discloses a wide and thick steel plate for a 700MPa-grade corrosion-resistant anti-fatigue marine tendon pipe and a production method of the wide and thick steel plate. According to the component design of the wide and thick steel plate, CEIIW is controlled to be 0.41-0.47%, CEPcm is controlled to be 0.16-0.20%, low-Nb and low-Mo design is adopted, the phase change temperature is increased, and phase change of polygonal ferrite is promoted; rE solid solution, interface segregation and other effects are fully utilized to improve the strength and corrosion resistance, and the RE and Ca act together to purify molten steel and modify and disperse inclusions. On the basis of component design, low-temperature heating, rough rolling multi-stage thickness section high-temperature gradient deformation and low-temperature rolling, intermediate temperature-waiting blank rapid cooling after rough rolling is finished, finish rolling low-temperature deformation, multi-stage water cooling and other methods are adopted to obtain a microstructure of lath bainite, granular bainite and polygonal ferrite, and the proportion, size and distribution control of all phases is ideal; the method plays an important role in obtaining good comprehensive performance of the steel plate.

The invention discloses a rolling and annealing treatment process for a copper-steel composite strip, and relates to the technical field of material rolling, the process comprises the following steps: selecting a high-purity copper plate and a stainless steel plate, and depositing a nano nickel / graphene composite transition layer through a magnetron sputtering technology; the stainless steel layer is promoted to deform through front-section low-speed high-pressure rolling, and the copper layer interface bonding force is improved through rear-section high-speed low-pressure rolling; performing short-time local annealing by using a high-frequency induction coil; honeycomb-shaped micro-pits are formed in the stainless steel surface through the laser micro-texture technology, and the interface bonding force is improved in combination with the nano-nickel / graphene layer. Copper layer hardening is eliminated through low-temperature annealing, stainless steel recrystallization is promoted through medium-temperature annealing, and a nanometer precipitated phase is fixed through rapid water cooling; the heating rate is controlled, and nitrogen-hydrogen mixed gas is used for preventing oxidation; the rolling process and the annealing process are seamlessly connected, and the temperature, the stress and the atmosphere are detected in real time through an online monitoring system. The mechanical property, the corrosion resistance and the machining stability of the copper-steel composite strip are remarkably improved.

The invention discloses a hot continuous rolling unit thickness detection and optimization method based on double closed-loop feedback control. In order to improve the problems of thickness control precision, response speed, a multi-rolling-mill cooperative operation mechanism and the like of an existing hot continuous rolling process, the comprehensive regulation and control method combining driving motor double-closed-loop speed regulation control, hydraulic cylinder pressing closed-loop control and thickness delay correction is provided. A multi-rolling-mill interconnection control system is constructed by coupling the rolling mills, the loops, the driving motors and the hydraulic cylinders, and high-precision dynamic adjustment of the tapping thickness is achieved. A double-closed-loop feedback control method is adopted, the rotating speed of a driving motor is adjusted by combining a rotating speed loop and a current loop, rolling force is dynamically adjusted through a hydraulic cylinder, and a thickness delay correction system is introduced to compensate thickness transmission errors between racks. According to the method, the thickness response time and overshoot of the hot rolling mill can be reduced, the thickness control precision and the system stability are improved, and the method has important guiding significance and engineering application value for high-precision hot continuous rolling production.

The invention belongs to the technical field of cobalt-based alloy machining, and particularly relates to high-strength cobalt-based alloy rolling machining equipment which comprises a rack and a cooling system, an upper roller and a lower roller are installed on the rack, one end of the rack is fixedly connected with a first motor, and the first motor is connected with the end of the lower roller through a reduction gearbox; and the other end of the lower roller is mounted on the bearing seat. The device further comprises a thickness acquisition module and a stress acquisition module. The thickness acquisition module and the stress acquisition module are used for monitoring the thickness and rolling pressure fluctuation of a rolled plate in real time, the control module is used for generating a corresponding fluctuation coefficient, and the thickness fluctuation coefficient and the stress fluctuation coefficient are comprehensively analyzed to generate an evaluation coefficient; and the roller spacing, the rolling speed and the working state of a cooling system are dynamically adjusted according to the evaluation result, so that the rolling process can adapt to material characteristics and working condition changes, the thickness uniformity of rolled plates is effectively improved, and the adverse effect caused by abnormal fluctuation of rolling pressure is reduced.

The invention discloses a hot-rolled strip steel coiling temperature control method and related equipment, and relates to the technical field of hot-rolled strip steel, and the method comprises the following steps: determining a constant finish rolling speed of strip steel through a quadratic programming optimization algorithm based on a finish rolling outlet speed set value and a target finish rolling temperature of the strip steel; controlling the strip steel to pass through a laminar cooling area at a constant finish rolling speed and reach a target finish rolling temperature; the steel type specification, the constant finish rolling speed and the target finish rolling temperature of the strip steel are input into the heat flow density prediction model, and the heat flow density self-adaptive coefficient of the laminar cooling area is output through the heat flow density prediction model; based on the heat flow density self-adaptive coefficient and the target coiling temperature of the strip steel, the head preset header water quantity of the strip steel is determined; and in the process that the strip steel passes through the laminar cooling area, the head actual header water quantity of the strip steel is adjusted to the head preset header water quantity, so that the coiling temperature of the strip steel reaches the target coiling temperature.

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

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

The invention discloses a cold rolling speed-rolling force-tension cooperative control system and method for a composite board, and the method comprises the steps: firstly, achieving the multi-step dynamic prediction of rolling key parameters through the time sequence feature extraction capability of a GRU network based on the cold rolling data of a multi-layer composite board, and achieving the feed-forward control through online optimization; a fuzzy PID self-adaptive compensation strategy is combined, so that the influence of external disturbance and parameter time variation is effectively inhibited; and the two methods are combined in a weighted fusion manner, so that the perspectiveness is ensured, the real-time disturbance influence is considered, and the cold rolling speed-rolling force-tension cooperative control of the composite plate is realized. According to the cold rolling speed-rolling force-tension cooperative control system and method for the composite board, the control effect is better, higher generalization ability and anti-interference performance are achieved, the control precision and stability of cold rolling of the multi-layer composite board are greatly improved, and the system and method can be widely applied to the cold rolling production process of the multi-layer composite board.

This invention provides a thickness control method for a single-stand reversible cold rolling mill. The single-stand reversible cold rolling mill unit includes an inlet coiler, an outlet coiler, a mill body, a mill hydraulic system, an inlet thickness gauge, an outlet thickness gauge, an inlet speed gauge, an outlet speed gauge, an inlet tension gauge, and an outlet tension gauge. The single-stand reversible cold rolling mill unit also includes an S-roll, with S-rolls at both the inlet and outlet of the unit. The S-roll can rotate 180°, with the upper roll of the S-roll able to rotate to the lower roll position and the lower roll of the S-roll able to rotate to the upper roll position. The 180° rotation causes the strip steel to wind in an S-shape on the S-roll. The thickness difference of the strip steel is eliminated by adjusting the speed of the inlet S-roll to control the metal flow rate entering the roll gap.

The invention relates to the technical field of metallurgical engineering, and discloses a cold-rolled strip steel deviation control method and device, and the device comprises a strip steel operation state monitoring module, a side guide roller dynamic regulation and control module, a multi-parameter collaborative optimization module, a fault early warning and self-diagnosis module, and a man-machine interaction control module. According to the method, strip steel edge position data are collected in real time through a high-precision laser distance measuring sensor array, the deviation amount is calculated through a dynamic weighting algorithm, and a three-level early warning mechanism is established based on material characteristics and technological parameters; a waste roller transformation technology is innovatively adopted, a scale breaker supporting roller is transformed into a self-adaptive side guide roller through a special welding process, and the transformation cost is reduced while the control precision is guaranteed. According to the method, the occurrence rate of scratching accidents caused by contact between the edge of the strip steel and equipment is reduced, double improvement of economic benefits and technical performance is achieved, and data support is provided for process optimization and quality tracing.

The application discloses a kind of hot rolling mill set roll motor overload pre-determination method.The method includes: pre-setting a current sampling time;In the current sampling time of pre-setting, the roll motor current data of each rolling unit in hot rolling mill set is periodically sampled;The maximum overload rate of hot rolling mill set roll motor in current sampling time is calculated;Judge whether the maximum overload rate is less than overload rate determination threshold;Judge whether the next piece of steel computer set rolling force is less than overload rolling force determination threshold;If the maximum overload rate is greater than overload rate determination threshold and computer set rolling force is greater than overload rolling force determination threshold, then determine that hot rolling mill set roll motor will overload.The roll motor overload pre-determination method of the application can accurately predict the hot rolling mill set roll motor overload jump power in time, control the rolling rhythm of hot rolling mill set, and avoid the situation that hot rolling mill set roll motor appears jump power and stops due to the too fast rolling rhythm of hot rolling mill set.

The invention discloses a preparation method of a titanium-steel composite plate and the titanium-steel composite plate, and belongs to the technical field of metal composite material preparation. The preparation method of the titanium-steel composite plate comprises the following steps: (1) carrying out titanizing treatment on the surface of a pretreated steel substrate to form a titanizing layer, so as to obtain a titanized steel substrate; (2) laminating the titanized steel substrate and the pure titanium plate, pre-pressing, and sequentially carrying out double-pass composite rolling and heat treatment to obtain a titanium steel composite plate; wherein asynchronous isothermal rolling is adopted for the first pass of double-pass composite rolling, and isothermal symmetric rolling is adopted for the second pass of double-pass composite rolling. The preparation method is simple, efficient and low in cost, a uniform and compact titanium layer is formed on the surface of the steel substrate through titanizing treatment, the binding force between the pure titanium plate and the steel substrate is enhanced, and generation of harmful metal compounds is avoided. Meanwhile, the composite rolling technology combining asynchronous isothermal rolling and isothermal symmetric rolling is adopted, and the internal organization structure and performance of the titanium steel composite plate are effectively improved by regulating and controlling rolling parameters.

The invention relates to the technical field of steel rolling, and particularly discloses a high-speed wire rod slitting rolling method which comprises the following steps: blank heating: heating a steel blank to 1050-1100 DEG C, and keeping rolling plasticity; rough rolling and intermediate rolling: rolling the steel billets into intermediate billets through 1 #-9 # rolling mills; in the step of pre-finish rolling and segmentation, two pre-rolled pieces with the diameter phi being 24 mm are obtained through segmentation rolling through a 13 #-18 # pre-finish rolling machine, a double-line segmentation system and a shared channel system are adopted in a segmentation composite high-line production line, the double-line segmentation system is formed by transforming a 2 # small rod production line into a double-segmentation composite high-line production line, and the double-segmentation composite high-line production line comprises a north line segmentation channel and a south line segmentation channel. A steel splitting device is arranged behind the 18 # pre-finishing mill; finish rolling and cooling: respectively passing the cut wire through a north line or south line finish rolling unit, then looping by a silking machine, and cooling by a scattered coil air cooling line; the production capacity and the economic benefit are improved by cutting the hole pattern and splitting the steel conveying curve guide groove, and the multi-specification requirements of the market are met.

The embodiment of the invention provides a preparation method of a titanium foil strip with high elongation and good surface microcosmic quality. The preparation method comprises the steps that a sponge titanium raw material is smelted and machined through a primary electron beam cold hearth smelting furnace; the titanium metal plate blank is coated with an anti-oxidation coating to form an anti-oxidation coating; the titanium metal plate blank coated with the anti-oxidation coating is subjected to heating, heat preservation, hot rolling and continuous annealing shot blasting acid pickling treatment; the hot-rolled titanium coil is subjected to first-rolling-process cold rolling, and continuous annealing, shot blasting and acid pickling are conducted after cold rolling; carrying out multi-rolling-process cold rolling and semi-finished product annealing by adopting a cold rolling unit and an argon protection cover type furnace; carrying out finished product rolling on the annealed master tape by adopting a cold rolling unit; performing finished product heat treatment on the titanium strip by adopting an argon shield continuous annealing furnace; and straightening the annealed titanium strip by adopting a tension straightening machine. According to the embodiment of the invention, the titanium foil strip with high elongation and good surface microcosmic quality is obtained, and the prepared titanium foil strip is excellent in forming performance and surface microcosmic quality.

The invention belongs to the technical field of bar production, and particularly relates to a production method of a steel bar for a heavy-load automobile half axle, and the steel bar comprises the following chemical components in percentage by mass: 0.39-0.42% of C, 0.25-0.35% of Si, 1.45-1.70% of Mn, less than or equal to 0.013% of P, less than or equal to 0.006% of S, less than or equal to 0.25% of Cr, less than or equal to 0.25% of Ni, 0.15-0.20% of Mo, 0.06-0.10% of V, less than or equal to 0.15% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that high-performance, high-purity and low-cost production of the steel bar for the heavy-duty automobile half shaft is realized through green short-process production of'ecological electric furnace + LF + RH + continuous casting 'in combination with low-carbon component design and a controlled rolling and controlled cooling process. And macrostructures and non-metallic inclusions of the finished steel meet the requirements of high-end products.

The invention discloses a composite plate hot rolling speed-deformation-pressure coupling control system and method, and the method comprises the steps: building a time-space sequence prediction model through employing a long-short-term memory network based on the hot rolling data of a multi-layer composite plate, predicting the rolling speed, rolling force and deformation, and obtaining the deformation of the multi-layer composite plate according to the deviation between the prediction quality and the target quality. And carrying out feed-forward correction on the roll gap by adopting a multi-target balance optimization algorithm. On the basis of feed-forward correction, the residual error between the actual thickness value and the set outlet thickness is further considered, a roll gap feedback adjustment strategy is designed, and composite plate hot rolling speed-deformation-pressure coupling control is achieved. The composite plate hot rolling speed-deformation-pressure coupling control method is high in control precision, the defects of a traditional method are overcome, speed-deformation-rolling force dynamic coupling control is improved, and the method can be widely applied to multi-layer composite plate hot rolling.

A copper-aluminum composite foil and a preparation method therefor. The preparation method comprises the following steps: S1, smelting an aluminum ingot and then pouring same into a preheated casting nozzle, and cooling and crystallizing cast molten aluminum until it is in a semi-molten state, so as to prepare a semi-molten aluminum material; preheating a copper material; contacting the surface of the semi-molten aluminum material with the surface of the copper material, and performing continuous cast rolling to prepare a composite mother blank with a thickness of 7.0-10.0 mm; S2, machining the composite mother blank into a blank with a thickness of 0.15-1.0 mm by means of cold rolling; S3, subjecting the blank to an annealing treatment at 190-300°C under the protection of an inert gas for 10-30 h, and S4, rolling the annealed blank foil to a thickness of 0.01-0.035 mm to prepare the foil. Further disclosed is a copper-aluminum composite foil prepared by the method. The thickness of the foil prepared by the preparation method for a copper-aluminum composite foil is smaller than that in the prior art.

The invention relates to the technical field of stainless steel thin strip preparation, in particular to a short-process preparation method for continuous casting of a 304 stainless steel thin strip, which comprises the following steps: smelting to obtain molten steel with unique components; the molten steel is subjected to twin-roll thin-strip continuous casting to obtain a cast strip; pickling; asynchronous cold rolling; and carrying out online pulse current annealing. According to the invention, unique molten steel components are adopted, so that the formation of a ferrite phase is inhibited in the casting process when the 304 stainless steel is subjected to twin-roll thin-strip continuous casting, and a cast strip obtained through twin-roll thin-strip continuous casting has no obvious segregation; meanwhile, the cast strip is subjected to one-step cold rolling and short-time annealing to obtain a finished product strip, and the shortest technological process is achieved; the short-time annealing adopts pulse current short-time annealing, the obtained finished product meets the performance requirement, and the technological process is greatly shortened; asynchronous cold rolling is adopted for cold rolling, the energy consumption and the equipment load in the rolling process can be reduced through the asynchronous cold rolling, meanwhile, surface defects in conventional rolling can be restrained, the surface quality of products is guaranteed, and the thickness uniformity is improved.

The invention belongs to the technical field of rolling, and discloses a Ni / Al nano multilayer film electroplasticity and current-assisted ply rolling forming method. The Ni / Al multilayer film is an energetic material and is used as a brazing heat source and a welding flux. According to the method, millimeter-level Ni foil and Al foil serve as raw materials, the thickness ratio of all layers is determined according to the maximum self-propagating heat release amount, a six-roller precision rolling mill is used for conducting multi-pass electroplastic ply rolling under pulse current, the pass deformation is 60%, and electric pulse annealing is conducted after rolling (the temperature is lower than a reaction critical value), and the Ni / Al nanometer multilayer brazing thin film with the total thickness being 50 micrometers and composed of thousands of layers of nanometer thin films is prepared. The method overcomes the problems of low production efficiency, high cost, narrow application range and the like in the prior art, and compared with a magnetron sputtering method, the method is low in manufacturing cost, short in period, large in area and good in mechanical property; compared with an accumulative ply rolling technology, interface recombination is excellent, nickel layer breakage is light, and heat release is high; and the material is low in deformation resistance and good in plasticity, multi-layer film ply rolling forming property integrated forming is achieved, and industrial application is facilitated.

The application discloses a method for controlling damage of a high-speed rod product rack roller ring, and relates to the technical field of rod rolling processes, which comprises the following steps: obtaining working parameters of finishing mills in each production stage in a high-speed rod rolling production line; extracting the working parameters of the finishing mills in the finishing stage; and adjusting the working parameters of the finishing mills in the finishing stage to control the damage frequency of the roller ring of the finishing product rack. Through the method, the tension between the rolling pieces in the finishing mill is controlled, the head biting impact of the rolling pieces is controlled, the upper pressing method is adopted for the finishing product rack, and the roller ring cooling water is improved, so that the stability of the steel biting and the cooling effect of the roller ring are controlled, the production accidents caused by the damage of the roller ring of the finishing product rack are reduced, and stable production is realized.

A reversing roughing mill for rough rolling an aluminium or aluminium alloy product fed along a feed plane, the roughing mill comprising: a reversing horizontal roughing stand 1; a first cooling device 10 arranged upstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with a cooling liquid; and a second cooling device 15 arranged downstream of the reversing roughing stand 1 and configured to cool the product entering the reversing roughing stand 1 from above with the cooling liquid.

A method for manufacturing a pearlitic steel rail having high surface hardness, relating to the technical field of iron and steel smelting. The method comprises: feeding molten steel having undergone preliminary smelting into a ladle refining furnace, and adding an alloying element for deoxidization and alloying treatment to obtain refined molten steel, so as to further obtain a continuous casting billet; heating the continuous casting billet to a preset temperature by means of a heating furnace, and feeding the heated continuous casting billet into a rolling mill for multi-pass rolling comprising first-pass rolling and second-pass rolling, wherein during the first-pass rolling, the rolling speed is 5.0-7.5 s-1, and the rolling deformation should be 10-15%; after the first-pass rolling, the original austenite grain size is 85-115 μm; and the number of rolling passes is 9-13, and the total deformation is 85-95%; and gradually reducing the gap between rollers of the rolling mill to obtain steel rail blocks having desired specifications and shapes and performing on-line heat treatment and processing treatment on the steel rail blocks to obtain steel rails.

The invention belongs to the technical field of bar production, and particularly relates to a steel bar for an engine crankshaft and a production method thereof, and the steel bar comprises the following chemical components in percentage by mass: 0.25%-0.30% of C, 0.20%-0.30% of Si, 1.00%-1.10% of Mn, less than or equal to 0.015% of P, less than or equal to 0.008% of S, 1.20%-1.30% of Cr, less than or equal to 0.25% of Ni, 0.05%-0.09% of Ti, 0.15%-0.20% of Mo, 0.06%-0.10% of V, less than or equal to 0.10% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that the steel bar for the engine crankshaft is produced by adopting the ecological electric furnace + LF + RH + continuous casting smelting process and the rolling process, and the strict requirements of the steel bar for the high-end engine crankshaft in the aspects of obdurability, fatigue life and surface quality are met.

The application discloses a preparation method of a 1.5mm hot-rolled 800MPa-grade weather-resistant photovoltaic support steel in the field of hot-rolling steel production, and the method comprises the following steps: adopting a steel grade component with 800MPa-grade weather resistance, controlling the thickness and length of the steel casting blank; adopting a hot feeding and hot charging mode for heating; rough rolling and finish rolling are carried out; laminar cooling is carried out on the steel strip after finish rolling; and finally, coiling is carried out. The application adopts a plate blank with a proper length, which is beneficial to reducing the temperature difference of the intermediate blank and the head and tail of the steel coil, the hot feeding and hot charging mode is adopted for heating, the core temperature of the plate blank can be improved, the rolling is stable, the rough rolling is carried out for four passes, the temperature drop at the entrance of the finish rolling is further reduced, and through reasonable control of the rolling speed, the plate crown, the loop amount, the bending force and the roll shifting amount and other processes in the finish rolling process, the 1.5mm thick hot-rolled steel plate has the advantages of good rolling stability, good weather resistance and excellent comprehensive performance, and the production efficiency and the yield of the extremely thin gauge hot-rolled high-strength weather-resistant steel plate can be improved.

The present invention discloses a control method for quickly resuming the production of deformed steel bars after a universal shaft is damaged, including Step 1: confirming the rolling mill stand N corresponding to the damaged universal shaft, and taking the rolling mill unit where it is located as the variable unit; Step 2: judging whether the rolling mill adjacent to the original Nth stand rolling mill in the variable unit is a horizontal-vertical alternating empty mill. When the judgment is yes, taking the position where the horizontal-vertical alternating empty mill is located as the current use position, replacing the empty passing guide groove within the use position, installing the original Nth stand rolling mill at the use position, and installing an empty passing guide groove or a rolling mill to replace the roller table at the Nth stand position. When the judgment is no, judging whether there is an empty unit in the variable unit. When the judgment is yes, moving the original Nth stand rolling mill and the rolling mills between the original Nth stand rolling mill and the empty unit two positions in the direction of the empty unit; The control method for quickly resuming the production of deformed steel bars after a universal shaft is damaged according to the present invention can quickly resume production when the universal shaft is damaged.

The application discloses a kind of composite board cold rolling speed-rolling force-tension collaborative control system and method, based on multilayer composite board cold rolling data, first utilize the time sequence feature extraction ability of GRU network, realize the multi-step dynamic prediction of rolling key parameters, and realize feedforward control using online optimization;Combined with fuzzy PID adaptive compensation strategy, effectively suppress the influence of external disturbance and parameter time-varying;The two are combined in a weighted fusion manner, which ensures foresight and considers real-time disturbance effects, achieving a kind of composite board cold rolling speed-rolling force-tension collaborative control.The composite board cold rolling speed-rolling force-tension collaborative control system and method proposed by the application not only has better control effect, but also has stronger generalization ability and anti-interference, greatly improves the control precision and stability of multilayer composite board cold rolling, and can be widely applied in multilayer composite board cold rolling production process.

The invention discloses a method for reducing high-grade non-oriented electrical steel rolling strip breakage, and relates to the technical field of non-oriented electrical steel production. Comprising the following steps of smelting, continuous casting, hot rolling, finishing, normalizing and pickling, rolling, annealing and coating, rewinding and slitting and packaging. The temperature of normalizing treatment is 820-850 DEG C, and cooling is conducted at the cooling speed of 30-50 DEG C / s after normalizing treatment; after acid pickling, the edge of the strip steel is heated to 150-200 DEG C, and then edge cutting is conducted; in the rolling step, the reduction rate of the first pass is controlled to be 32-33%; when the diameter phi of the steel coil is 508-800mm, the coiling tension adopts a taper tension control mode; when the coiling diameter of the strip steel reaches phi 800mm, the coiling tension adopts a constant tension control mode; the rolling strip breakage rate of the high-grade non-oriented electrical steel can be reduced to 40% or below, the production stability and the yield are remarkably improved, and the method is suitable for industrial large-scale production.

The invention provides a continuous rolling-foaming integrated preparation process of a heat insulation aluminum profile for a building, and belongs to the technical field of building aluminum profile processing. The process comprises the steps of aluminum profile pretreatment, continuous rolling forming, foaming material injection, composite rolling-foaming integration and low-temperature curing. Impurities on the surface of the aluminum blank are removed through degreasing and alkali washing in pretreatment; the continuous rolling adopts a five-pass die to synchronously heat and form, and the pass reduction rate is gradually reduced step by step; the foaming material is composed of a polyurethane prepolymer, hollow glass beads and the like, and is synchronously injected according to 70-80% of the volume of the aluminum groove. During composite rolling and foaming, joint closing and foaming are synchronously completed under pressure and high temperature, and waste heat is utilized for heat preservation during low-temperature curing. Through process integration and waste heat recovery, energy consumption is reduced, and production efficiency is improved.

A system for use in a rolling mill is disclosed that includes (a) a roll holder housing a plurality of rollers, and (b) a smart module coupled to the roll holder that includes (1) a power source for powering the smart module, (2) a microcontroller, (3) a motor for moving the roll holder and thereby controlling the position of the plurality of rollers based on instructions from the microcontroller, (4) one or more position sensors for detecting the position of the roll holder, and (5) a communications module that communicates with a central control computer to (i) communicate the position of the roll holder and other sensor data to the central control computer and (ii) receive instructions from the central control computer for controlling the position of the roll holder.

The present invention discloses a method for stably producing low-carbon drawing steel based on a continuous casting and rolling production line, belonging to the field of iron and steel production. The continuous rolling includes finish rolling, and the finish rolling adopts five-stand rolling. F5 adopts different-diameter rolling and roll misalignment rolling. The different-diameter rolling means that the roll diameter of the upper roll < the roll diameter of the lower roll, and the linear speed of the upper roll < the linear speed of the lower roll. The roll misalignment rolling means that the lower roll is misaligned towards the direction in which the strip steel enters. Compared with the prior art, the present invention improves the uneven deformation, structure and performance of the strip steel by adopting different-diameter misalignment rolling in finish rolling F5.