947results about "Tension/compression control device" patented technology

A control method and a control system of tension in the process of rolling periodic variable-thickness strips belong to the technical field of rolling. The method comprises the following steps: dividing segments on the rolled pieces, setting front and back tension values in each zone, realizing tension open-loop control and tension closed-loop control based on maximum torque limit and adding a dynamic torque compensation link and a mechanical friction torque compensation link; controlling torques of an uncoiler and a coiling machine motor and setting speed. 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.

The invention relate to a control technique of the rolling process of a rolling steel. The invention discloses a control method of a rough rolling intermediate billet camber. The control method combines a position control with a pressure control; in a multi-pass rolling of the positive-pass and reverse-pass of a roughing mill, the camber generation of the intermediate billet is restricted. The control method of the invention can reduce the additional value of the openness of a side guide plate, leads the flexible deformation of the intermediate billet between the inlet and the outlet of the roughing mill in the horizontal direction to be restricted by the side guide plate, reduces the camber of the intermediate billet, and prevents the severe abrasion which is caused by the long-term contact of the side guide plate and the intermediate billet.

The invention relates to a production process of a precise stainless steel band for a vehicle sealing pad. The production process comprises the following working procedures of: first cold rolling, solid solution, second cold rolling, spraying and degreasing, hot water spraying, hot wind drying, pre-bending straightening, stress relieving annealing, final bending straightening, finished product cutting, and the like. The production process adopts a 20-roller sendzimir mill and a unique rolling process to carry out cold rolling. Through the processes of degreasing, solid solution treatment, bending straightening, stress relieving annealing, and the like, the thickness tolerance undulation of a product is small, mechanical properties are stable, the plate flatness is good, the product is not easy to generate cracks and secondary deformation during stamping, and the quality of the product is obviously improved, thus the production process is suitable for industrial production and can meet the requirement for high quality of the vehicle part industry.

The invention discloses a production method of an aluminum and copper composite metal band. In the method, the aluminum and copper composite metal band is manufactured by anaerobic continuous casting and rolling of semisolid aluminum or aluminum alloy and a solid copper band. In the production method of the invention, the anaerobic metallurgical combination of the solid copper band and molten aluminum is realized, the aluminum oxidization problem is solved, the combined strength is high, and the aluminum and copper bonding strength is more than or equal to 100MPa; the continuous casting and rolling of the copper band and the molten aluminum are adopted to produce the aluminum and copper composite metal band, so the production efficiency is greatly improved by scores of times and the product quality is stable; the produced aluminum and copper composite metal band retains the original surface quality of the copper band, has a uniformly-thick copper layer and can be deeply processed by cold rolling; and the copper band and the molten aluminum, which comprise different components, can be used, and products are diversified and widely applicable. The method has the advantages that: the production process of the copper and aluminum composite band is advanced and comprises a few working procedures; and the energy-saving, material-saving and economic effects are obvious.

The invention relates to an alloyed hot-galvanized baking-hardened steel plate and the manufacturing method thereof, which solves the problems of the anti-pulverization of the galvanized layer, the surface quality and the baking-hardened value. The mass percentage for the chemical components of a baseplate is as follows: C 0.0015 to 0.0025 percent, Si less than or equal to 0.030 percent, Mn 0.50 to 0.60 percent, P 0.050 to 0.060 percent, S less than or equal to 0.015 percent, N less than or equal to 0.003 percent, sol.Al 0.030 to 0.055 percent, Nb 0.004 to 0.015 percent, O less than or equal to 0.0050 percent and the rest are Fe and unavoidable impurities. The weight of the galvanized layer (for a single side) is 30-60g/m2 and the mass percentage for the Fe component of the galvanized layer is 8 to 12 percent. The steel plate of the invention has excellent anti-pulverization performance of the galvanized layer, excellent surface quality and appropriate baking-hardened value.

The invention provides a unit process used for finishing, tension-bending, straightening, and recoiling the metallurgical cold-rolling strips. The process is characterized in that the process comprises at least the steps as follows: roll-up, uncoiling, head cutting, welding, tension-bending and straightening, tensioning piston, rectification, trimming, separating, coiling and coil removing. When the unit produces normally, a coiler provides initial tension for an outlet tension roller; when the production line is shut down for coil separating, the coiler is shut down, the tensioning piston provides the initial tension equivalent to the coiling tension during the normal production for the outlet tension roller and a tension-bending, and straightening machine continues to straighten the strips; the straightened strips are stored in the tensioning piston; when the coiler removes the coils and re-produces the next finished coils, the straightened strips stored in the piston are coiled, the lifting roller unit of the movable sleeve falls to a lower limit position, the coiler loads the tension and shifts the initial tension of the tension-bending and straightening machine from the tensioning piston to the coiler at the same time, and then the whole unit produces at an accelerated speed. The process can overcome the defects generated on the disc shear by the strips when the tension is shifted between the coiler and the tensioning piston owning to the shutdown of the coil separating.

The invention relates to a method for producing high-strength low-alloy steel. Wherein, it comprises smelting, refining, casting sheet blank, heating blank, removing phosphor, cooling and flattening; the smelting step uses pure steel, low phosphor, and low sulfur; in the casting step, the loose of blank and the aliquation are lower than B0.5level; in the heating step, vanadium+niobium+ titanium0.15%, nickel+chromium+copper<=0.50%, and the heating temperature is 1180-1220Deg. C; in the thermal rolling step, in the crystallize process, the deformation temperature is 1070-1000Deg. C, the deformation amount is 40-60%, and the rolling speed is 1.5-2.5m/s, and in the second step that rolling the non-crystallized area, the pressure is 200-400MPa, the rolling speed is 5-1.5m/s, and the deformation amount is 60-75%; and the interlayer cooling speed in the cooling step is 15Deg. C/s-25Deg. C/s.

The invention discloses a control method for the loose cover of a hot strip mill, which comprises the steps that: a. the parameter in a controller of the loose cover is set in advance, namely at least two angle intervals of the loose cover device are set and the loose cover is arranged in different angle intervals with different corresponding compensation factors; b. the angle signals of the loose cover device are sent to the controller of the loose cover by an angle decoder when the hot strip mill starts to work; c. comparison is made between the angle signals of the loose cover and the set angle interval by the controller of the loose cover to determine the compensation factor of the loose cover device; d. an output compensation value is determined by the controller of the loose cover based on the compensation factor of the loose cover and output to a servo valve of the loose cover to make compensation to the loose cover device. The invention modifies the control property of the loose cover and promotes the stability thereof.

The invention relates to a rolling device for preparing a high-toughness high-formability magnesium alloy sheet strip coil and belongs to the field of metal material rolling. The rolling device provided by the invention comprises a rolling machine, an uncoiling machine, a left-right recoiling machine, a front online heating insulating device of the roll machine, a rear online heating insulating device of the roll machine, a straightening machine, a bending rectifying machine, a thickness measuring device, a steering tension roll, a guide roll, a roller heating and lubricating device and the like. In the invention, an online continuous heating device and an advanced PLC (programmable logic control) feedback control system are adopted, and continuous temperature control rolling on the magnesium alloy strip coil is realized. The rolling device provided by the invention has the advantages of uniform heating temperature, high heating efficiency and high temperature control accuracy, and high-quality thin wrought magnesium alloy strip coils are efficiently produced by virtue of a roller preheating insulating system, a technical lubricating system, a strip shape control system and a tension straightening device, thus the geometric quality and structure properties of rolled metal can meet operating requirements.

The invention relates to a process for producing an accurate stainless steel band applied in an electronic industry. The process comprises the following steps of: the first cold rolling process; the first spray degreasing process; the first hot-water spraying process; the first hot-wind drying and solid dissolving process; the second cold rolling process; the second spray degreasing process; the second hot-water spraying process; and the second hot-wind drying process, bending stretching and straightening process and the process of cutting into finished products. According to the production process, a twenty-Hi sendzimir rolling mill and an unique rolling process are adopted for cold rolling; and the processes such as degreasing, solid dissolving treatment, bending stretching, straightening, and the like are performed, so that the product has little tolerance fluctuation of the thickness, stable performance, uniform surface color and roughness and no color difference, good plate flatness, improved quality and capacity of meeting the requirements of the electronic industry on top quality.

The invention discloses a strip steel tension dynamic control method based on loop quantity deviation and a control system using the strip steel tension dynamic control method, and relates to a control device or method which is specially applicable to a metal rolling mill or products machined by the metal rolling mill, in particular to dynamic control of hot-rolled strip steel tension through a loop. The control system comprises a main transmission speed control module, a tension adjusting module and a tension set value correction module, a strip steel tension set value is corrected by computing loop quantity deviation between a target loop quantity and an actual loop quantity in real time and according to the loop quantity deviation, the strip steel tension set value is increased if the actual loop quantity is higher than the target loop quantity, the strip steel tension set value is decreased if the actual loop quantity is lower than the target loop quantity, tension moment is computed according to the corrected strip steel tension set value and transmitted to a torque adjuster of an electric loop, the strip steel tension is dynamically controlled, and the problem of internal deviation of strip steel in a frame or narrow reduction of the strip steel due to easy deviation of the actual loop quantity of the loop caused by fluctuation of technological parameters in constant tension control of an existing strip steel tension control system is solved.

The invention provides a method and device for double-roller cast rolling-thermal tandem rolling, which are a method and device for producing aluminum and aluminum alloy plate blank. By using the method, thick cast rolling plate blank can be produced, and coiled material with quality corresponding to that of thermal rolling plate is produced by large rolling amount of thermal rolling, transmitting and coiling. The invention provides a method and device for producing aluminum and aluminum alloy coiled material with high efficiency and greatly improved property by modification aiming at shortcoming of limited cooling space and cooling intensity of the double-roller cast rolling mill in prior art. The invented device enlarges the cast rolling space of the cast rolling mill in prior art with 1.8-4.0 times, enlarges the roller gap thereof with 1.5-2.5 times, enhances the cast rolling speed thereof with 1.5-3.0 times, cast rolls the casting blank continuously with a temperature ranging from 310 DEC C to 510 DEG C, and the integral processing amount is controlled in the range of 40-85, thereby the yield, size accuracy and mechanical property are greatly improved, and the product range is enlarged. The invented device is: inclination angle adjustable off-centering reducing double-roller cast rolling-thermal tandem rolling- cutting-coiling production line.

The invention discloses a method for preventing strip breakage on startup. The method includes, before strip winding, processing sheets with broken strips at first after stopping of a cold rolling mill due to strip breakage, compressing roll gaps of various frames and regulating the minimum rolling force of the roll gaps of the different frames after finishing the strip winding, generating exit tension of the different frames prior to regulating roll bending force of working rolls and intermediate rolls after finishing compressing of the roll gaps, and then, starting the cold rolling mill. The method for preventing strip breakage on startup includes control of the roll gaps of the cold rolling mill, selection of rolling force and tension and generation of tension, regulation of actual inclination and tension deviation of different frames, control of bending conditions of the working rolls and the intermediate rolls after startup, thereby effectively controlling times of startup strip breakage of sheets with the thickness lower than 0.6mm and improving production efficiency.

The invention discloses a method for producing a metallic titanium plate by adopting a medium-wide band heat rolling set. The method comprises the following steps: heating a titanium plate blank with a thickness of between 50 and 90 millimeters in a roller-hearth type soaking furnace to between 800 and 1,000 DEG C, controlling inlet temperature of the titanium plate blank entering the medium-wide band heat rolling set at a temperature of between 800 and 950 DEG C, controlling process temperature to between 700 and 950 DEG C, and keeping final rolling temperature at a temperature of between 700 and 800 DEG C after fine rolling for seven times; and well controlling roll gap width, depressing rate, roll force and roll (rolling) speed of each stander of the heat rolling set, controlling the rolling speed of the titanium plate rolled by the tail stander of the heat rolling set at between 4.0 and 8.0 meters per second, and coiling the titanium plate by a coiling machine after cooling the titanium plate by water, wherein the coiling temperature is between 550 and 680 DEG C. The method uses a CSP production line to produce the non-ferrous metallic titanium plate (coil) for domestic initiation, and has extremely great economic and social benefits.

A method of controlling a continuous skin-pass and reduction operation for a metal strip includes the steps of passing a strip through a gap between working rollers of at least two successive rolling stands, only an upstream one of the stands providing substantial thickness reduction of the strip; determining an extension rate of the strip provided by the upstream stand; determining a tension of the strip downstream of the upstream stand; adjusting the speed of the working rollers of the upstream stand compared to the speed of the working rollers of a downstream one of said stands according to the determination of the extension rate; and adjusting the squeezing force of the upstream stand according to the downstream tension determination. A response time to the step of adjustment of the squeezing force is longer than a response time to the step of adjusting the speed of the working rollers.

The invention discloses a belt steel flattening elongation and slab-shaped complex control method, which is characterized by the following: the invention can choose draught pressure mode by comparing draught pressure adjusting elongation algebraic system and tension adjusting elongation algebraic system or use tension mode to control elongation, which can control rolling process of planisher according to set point of every processing parameter and relevant on-line measured value; the tension is controlled in draught pressure control mode, when the draught pressure accumulation regulating variable is over finite limit and the draught pressure keeps constant; the draught pressure is adjusted in tension control mode, when the tension accumulation regulating variable is over finite limit and the tension keeps constant; the curve roll force is adjusted when adjusting draught pressure.

The present invention provides a control device of a rolling machine, which restrains the plate thickness variation of rolling machine generated by the speed variation of a tension reel at the feeding-in/feeding-out side. In the rolling machine, the feeding-in/feeding-out side of the rolling machine (1) is provided with the tension reel (2) for unreeling and reeling the rolled material (u). The control device is provided with a tension and speed control unit (41) which sustains the tension between the tension reel (2) and the rolling machine (1) to an expected value. On the other hand, for the derivation to a preset tension value in the preset range, the speed of the tension reel is fixed to a constant value without modifying the tension error for restricting the speed variation of the tension reel.

The proportional control hydraulic system with steel rolling constant tension control comprises tension hydraulic cylinder, pressure sensor, tension hydraulic cylinder control, hydraulic fixture, with the tension hydraulic cylinder control composed of high pressure oil source, high pressure safety pressure control, tension hydraulic action control and proportional control, with the high pressure oil source connecting with two tension hydraulic cylinder control device and proportional control, tension hydraulic action control device, proportional control device connecting with hydraulic cylinder bar free cavity and with bar cavity, the clamping control composed of low pressure oil source, low pressure control device, energy accumulation device, clamping cylinder action control, with the low pressure oil source connecting with two clamping hydraulic cylinder through low pressure control device, energy accumulation device and clamping cylinder action control device, tension hydraulic cylinder with bar cavity connected with pressure sensor, and each oil return opening and discharge opening connecting with the oil tank.

The invention provides a control method for reducing the influence of slipping of a tension roll set. The control method is characterized by comprising the following steps of 1, monitoring of the tension roll set slipping state, 2, formulating of a tension roll set tension control method, and 3, reducing and even eliminating of the tension roll set slipping state through a fixed-step approach method. According to the control method for reducing the influence of slipping of the tension roll set, in a control system, through three slipping judgment strategies, whether the tension roll set in a cold rolling strip material production line slips or not and which tension roll slips are monitored in real time, and according to the production state, the tension roll set in the production line is controlled through the formulated composite control method. When the slipping state occurs, through the fixed-step approach method, the tension, torque and speed are adjusted so as to reduce and finally eliminate the occurring slipping phenomenon of the tension roll set.

The invention discloses a method for producing a stainless steel band for a mobile phone, in particular relates to a method for producing the stainless steel band for processing the mobile phone shell. The method is characterized by comprising the steps of material preparation, primary rolling, solution treatment, primary cleaning, secondary rolling, secondary cleaning and straightening and withdrawal, etc. The stainless steel band produced by the method is further processed into the mobile phone shell which produces no fingerprint after being touched by hands and is beautiful. The method can meet the demand of the mobile phone shell while the production cost is reduced.

The invention discloses a method for producing a titanium strip by adopting a conventional hot continuous rolling machine set, wherein the method comprises the following steps: heating a titanium plate blank with the thickness of 150 to 250mm to the temperature of 800 to 900 DEG C in a walking beam type heating furnace, manufacturing the titanium strip with the thickness of 2.5 to 20mm through five passes of rough rolling and continuous rolling of six stands, and coiling into a strip coil through a coiler, wherein the finishing temperature is larger than 650 DEG C, the coiling temperature is larger than 550 DEG C, and the coil weight is 5 to 15 tons. Producing the titanium strip through the conventional hot continuous rolling machine set belongs to domestic initiation and has great economic and social benefits.

The invention provides a method for levelling a titanium plate coil, which comprises the following steps: delivering the titanium plate coil subjected to annealing treatment to a levelling machine, and directly carrying out levelling extension on the titanium plate coil by a levelling roll on the levelling machine or carrying out wet levelling on the titanium plate coil by the levelling roll under the conditions that the rolling speed is 50 to 200 meters per minute, the uncoiling tension is 0.5 and 4 tons, the curling tension is between 3.0 and 5.0 tons, and the extension rate is between 0.80 and 2.0 percent. After the cold-rolled and annealed titanium plate coil is subjected to leveling extension by the levelling roll on the levelling machine, the levelling method can eliminate stress and influence of the stress, level plate surfaces, and obtain better surface quality; and all the plate shape, dimension, surface quality, mechanical property, and the like of the leveled titanium plate coil achieve national standard requirements, and completely meet market demand.