404results about How to "Improve shape quality" patented technology

The invention relates to a rolling method of cold rolling strip steel, in particular to a control method of edge portion strip shape of thin strip steel rolled by a cold continuous rolling mill or a two-stand temper mill. In a strip shape feedback control system centered on a last stand and on the basis of fundamental strip shape control function of major control for conventional edge waves and center waves, the method identifies the state of the edge portion strip shape of the strip steel based on the difference between the actual measured strip shape of strip steel edge portion together with the adjacent areas at the exit of last stand and an objective strip shape, and adjusts the corresponding strip shape executive mechanisms of the last stand and the rest stands according to the state of the edge portion strip shape to realize effective control for the edge portion strip shape of the strip steel, such as small edge waves and small side waves, thereby further improving the quality of the strip steel after cold rolling or temper rolling.

The invention relates to a complete roll forming configuring method for a wide flat steel hot rolling finish mill set. According to the characteristics that an upstream machine frame controls the convexity and a downstream machine frame controls the flatness in the seven-machine frame and four-roll hot rolling wide flat steel finish mill, a finish rolling inlet machine frame F1 adopts negative convexity working roll forming, a machine frame F2, a machine frame F3 and a machine frame F4 adopt cubic CVC working roll forming, and a machine frame F5, a machine frame F6, and a machine frame F7 adopt negative convexity working roll forming of sine curves and are matched with periodic roll shifting of the working roll with long stroke. The supporting rolls of all the machine frames of the finish mill set adopt positive convexity roll forming of sextic polynomes. The method improves the transverse rigidity of the machine frames of the finish mill, improves regulation and control efficiency of roll bending force of the working roll, and reduces flexibility deformation of the roll. The roll forming configuring method for the finish mill set improves stability of the wide flat steel rolling, reduces the deflection amount of the wide flat steel, prolongs the planned length for rolling and greatly improves profile shape control precision of the wide flat steel.

The invention relates to a slight center wave strip-shape control method of hot-rolled strip steel. The method comprises the following steps: firstly, choosing a strip-shape feedback control frame; utilizing the adjusting manner of upstream frames, namely, adjusting the roll bending forces of the frames F2-F4 to realize the targeted slight center waves at a precision rolled outlet; secondly, controlling and adjusting the roll bending forces; detecting the flatness of the strip steel in real time by a strip-shape instrument and comparing it with a target value; if the deviation exists, adjusting the roll bending forces of the frames F2-F4. The slight center wave strip-shape control method of hot-rolled strip steel is applicable to overcoming strip-shape problems caused by the stages such as cooling and thermal treatment after hot rolling; the strip-shape quality of martensitic stainless steel strips is improved greatly and the scratching on the surface strip-shape in follow-up pickling and continuous annealing production is solved.

The invention provides ultra-high strength steel with yield strength level of 1100MPa-1200MPa and a production method of the steel. The chemical constituents (weight percentage) include: 0.15-0.18% of C, 0.20-0.25% of Si, 0.85-1.25% of Mn, 0.20-0.60% of Cr; and 0.45-0.65% of Mo, 0.035-0.060% of V, 0.015-0.020% of Nb, 0-0. 55% of Ni, 0-0.035% of Cu, 0.01-0.06% of Al, no more than 0.015% of P, no more than 0.01% of S, no more than 0.008% of N, the balance of Fe and unavoidable impurities. The production method includes: smelting and casting into casting blank; and heating the casting blank to 1150-1250 DEG C, wherein the final rolling temperature is 860-920 DEG C, the coiling temperature is 650-750 DEG C, the quenching heating temperature is 880-930 DEG C, the thermal insulation time is 20-90min, the tempering heating temperature is 100-450 DEG C, the thermal insulation time is over 90min. Slow cooling or air cooling is conducted to room temperature. For the steel plate produced with the constituents and the technology, the yield strength is 1150-1230MPa, the tensile strength is 1250-1340MPa, the elongation is 11-13.5%, and the impact power value at minus 40 DEG C is 21-34J.

The invention discloses a manufacturing process of an aluminum alloy wheel, which comprises the following steps: step 1) forming a casting blank in a low-pressure casting mode; step 2) forming a positioning hole on a spoke blank of the casting blank; step 3) preheating the casting blank by a first heating device; step 4) cooling the spoke blank of the casting blank; step 5) mounting the casting blank to a spinning machine; step 6) spinning a wheel rim blank of the casting blank by the spinning machine, heating the wheel rim blank by a second heating device to sufficiently ensure that the spinning temperature is not reduced and simultaneously the wheel rim blank keeps certain plasticity to control the deformation and the deforming speed of the wheel rim blank in the hot spinning process soas to obtain a crude product with good appearance and mechanical properties; and step 7) to step 9) performing heat treatment, mechanical processing and arrangement on the crude product so as to obtain the aluminum alloy wheel with low cost, light weight and good mechanical properties.

The invention relates to a roller wear optimization control method for improving the quality of band steel. The method comprises the following steps of: 1, classifying rollers according to roller materials; 2, acquiring the roller shape and surface temperature data of working rollers of a front rack and a rear rack in more than two rolling periods for different roller materials; 3, performing optimization processing on the acquired data; and 4, performing roller wear computation and optimization control, namely performing the roller wear computation by using optimized wear conversion factors according to different roller classes to realize the optimization control over band steel profiles and roller gaps. In the optimization control method provided by the invention, parameter optimizationis performed according to different roller material types so as to improve the computational accuracy of a roller wear model and further improve band steel profile quality and roller gap control accuracy; moreover, measurement planning and parameter regulation processes are simple, operable and convenient to implement.

The invention relates to square or flat material production line jet cooling thermal treatment equipment, which mainly consists of upper and lower strong cold jet devices (15 and 15a), upper and lower medium cold jet devices (13 and 13a), upper and lower weak cold jet devices (12 and 12a), upper and lower aerosol jet devices (3 and 3a), side cold jet devices (16), front, middle and rear blowing devices (11, 14 and 6), a flow control device (2) and an upper jet device lifting device (1), wherein the upper strong, medium and weak jet devices (15, 13 and 12), the upper aerosol jet devices (3) and the front, middle and rear blowing devices (11, 14 and 6) can lift up and down together with the lifting device (1) so as to adapt to the requirements of square or flat materials of different thicknesses. The side cold jet devices (16) are arranged on two sides of a rail (8), and can quickly cool the thick square or flat materials. The cooling capacity of the cooling system can be regulated by opening the jet cooling devices of different groups and regulating the flow control device (2). Front and rear staggered nozzles dense in the middle and sparse on two sides are arranged so that the jet cooling system is uniform and the quenched square or flat materials have low deformation, unique texture and no cracking.

The invention relates to the field of silicon steel cold rolling, and discloses a cold rolling method for high grade non-oriented silicon steel through hot rolling, acid pickling and non-edge-cutting.The cold rolling method comprises the following steps that a steel coil is obtained, non-edge-cutting normalizing acid pickling is carried out, then a one-time cold rolling method is adopted for continuous reversible type five-pass cold rolling, the reduction rate, rolling force, entry side unit tension and exit side unit tension of each pass are controlled, emulsified liquid spraying is adoptedin rolling for process lubricating and cooling, thermal expansion adjustment steel coil plate shape of a working roll is controlled in a partitioned cooling mode, a rolled product is obtained, and then subsequent procedures are conducted conventionally. The cold rolling method for high grade non-oriented silicon steel through hot rolling solves the problems of poor rolling efficiency and poor finished product rate of high silicon content varieties.

The invention relates to a sectional cooling control method for an emulsion of a working roller of a single-frame rolling mill. Particularly, a fuzzy modeling method is used for establishing a quantitative relation among a plate-shape deviation, a previous regulating quantity of injected flow of the emulsion and a present regulating quantity of the injected flow of the emulsion, thereby realizinghigh-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill. The method provided by the invention overcomes the technical problem that precise control cannot be realized because a long-time hysteresis phenomenon exists in an emulsion injecting cooling action mechanism; high-precision sectional cooling control of the emulsion of the working roller of the single-frame rolling mill is realized, thereby efficiently eliminating high plate-shape deviation of cold-rolling strip steel and promoting the quality of the plate shape of a cold-rolling strip steel product; the method is simple and practicable, fully meets a real-time demand of a sectional cooling control system and is characterized by effectiveness and practicability; and a firm foundation is established for high-precision plate-shape control of the cold-rolling strip steel.

The invention discloses a fully-automatic flexible pipe filling and tail sealing machine, and relates to the technical field of flexible pipe filling and tail sealing machines. The fully-automatic flexible pipe filling and tail sealing machine is characterized in that a rack, a rotating disc arranged on the rack, and a driving mechanism used for driving the rotating disc to rotate on the rack areincluded; a plurality of pipe cups used for storing flexible pipes are arranged on the rotating disc; a feeding device, a pipe feeding device, a pipe pressing device, a filling device, a clamping heatsealing device, a tail cutting device, a pipe unloading device and a control device which are sequentially arranged on the rack are further included; the feeding device, the pipe feeding device, thepipe pressing device, the filling device, the clamping heat sealing device, the tail cutting device and the pipe unloading device are controlled through the control device, and the fully-automatic filling and tail sealing processes of the flexible pipes are achieved; and the effects that the automatic degree of flexible pipe filling is increased, the product quality is good, and the working efficiency is high are achieved.

The invention discloses a method for comprehensively controlling a plate shape of a double six-roller UCM model temper mill unit. The method is characterized by comprising the following steps: a. collecting equipment parameters of the double six-roller UCM model temper mill unit; b. collecting key rolling technology parameters of a strip material to be comprehensively set; c. calculating optimum setting values of working rolls of 1# frame and 2# frame, ,roll bending of an intermediate roll and movement of the intermediate roll; and d. carrying out comprehensive setting to roll bowing force of the movement of the 1# frame and the 2# frame on the unit according to calculated optimum movement and comprehensive setting value of the roll bowing force. The comprehensively controlling method provided by the invention not only can improve controllability to the plate shape by the roll bending of the working roll and the intermediate roll of the double six-roller UCM model temper mill unit, movement of the intermediate roll and other plate shape control modes, bring full play of roll bending and movement and improve the plate shape quality of a finished product, but also can improve the service life of a roller, and reduce roll consumption, so as to bring significant economic benefit for company.

The invention provides a method for controlling the head and tail shapes of hot-rolled strip steel. For the control on the head shape of strip steel, the smooth switching between the balancing and roll bending of a rack is controlled through a steel biting rising edge signal of the rack; and for the control on the tail shape of the strip steel, the smooth switching between the roll bending and balancing of a follow-up rack is controlled through a steel throwing falling edge signal of an upstream rack. According to the invention, through the reasonable design on a hydraulic balancing and roll bending control scheme of a working roll of a rear finishing mill, phenomena such as the head and tail shapes of strip steel are deteriorated due to the instantaneous switching between balancing and roll bending, and the like can be effectively prevented, thereby improving the quality of head and tail shapes of the strip steel, avoiding the occurrence of creasing and strip breakage accidents, and reducing the production cost.

The invention provides a continuously variable crown mill support roll to be matched with a roll curve of a continuously variable crown work roll. The roll shape is skew asymmetrical curve which essentially consists of a roll gap whole line contact curve section in the range of the strip width at the middle of the roll body and a contact line variable curve section at two ends of the roll; and the roll shape curves of an upper support roll and a lower support roll are the same but are arranged reversedly in an angle of 180 degrees The continuously variable crown mill support roll with the roll shape curve and the mill roll system with the continuously variable crown work roll can not only reduce uneven distribution and peak of the contact pressure between the roll, reduce or eliminate side spalling of the continuously variable crown mill support roll with normal crown, improve service cycle and service life of the support roll and reduce roll consumption of the support roll, but also overcomes harmful contact zone outside the rolled strip width and improves roll gap lateral rigidity of the mill and plate shape control efficiency of bending force, thereby improving plate shape quality of the rolling strip.

The invention relates to a rolling method of cold-rolling strip steel, in particular to a feedforward control method of cold-rolling strip steel strip shape on a two-stand temper mill. A control method for the strip shape of the two-stand temper mill of the cold-rolling strip steel conducts feedforward control compensation for working roll bending force or intermediate roll bending force of two stands separately to reduce the combined impact of temper rolling force and tensile force on the strip steel strip shape in the processes of acceleration and deceleration on the basis of conventional strip shape feedback control centered on No. 2 stand, and based on the variation of the actual measured temper rolling force of the two stands, the tension of stand entry, the tension between stands and the tension of stand exit. The control method on the one hand improves the strip shape quality of the strip steel after the strip steel is rolled, and on the other hand enhances the stability in the process of temper rolling.

The invention discloses a hot rolling flat roller play control method which provides more specific roller play strategies for different tandem rolling plans. The play control method includes the steps of classifying all strip steels of a rolling plan into two categories, a wide plate and a narrow plate, based on a critical width; as to the narrow plate, calculating the roller play positions of all the strip steels in a recursion mode, and then extracting the roller play position of the narrow plate; as to the wide plate, determining a permitted variation range of each roller play position, building an objective function for evaluating the sectional shape of the strip steel based on the rolling plan, and then optimally calculating the roller play position of the wide plate by employing the genetic algorithm. The hot rolling flat roller play control method breaks through the conventional roller play mode by providing more specific roller play strategies for different tandem rolling plans. The strip steels are classified into the wide plate and the narrow plate, and the narrow plate is calculated in a recursion mode, while the wide plate is optimally calculated by the genetic algorithm. Thus, the hot rolling flat roller play control method plays an active role in improving the quality of the strip shape of the tandem rolling strip steel.

The invention discloses a method for designing a roller curve of a high-strength steel leveling machine, which comprises the following steps: collecting parameters of steel in the leveling machine, setting a curvilinear equation and a related computation model and an objective function, inputting the related parameters into the curvilinear equation, the computation module and the objective function, obtaining the optimal parameters of the roller curve, and further obtaining the optimal roller curve of a working roller and a supporting roller. The method for designing the roller curve is characterized in that all the front tension, the rolling pressure and the pressure among rollers are transversely and evenly distributed and adopted as the optimal objective function at the first time, and peak values of the front tension, the rolling pressure and the pressure among rollers are restrained at the same time, a set of new mathematical models optimally designed of the curve of the high-strength steel roller is established, and applicable roller curves of the working roller and the supporting roller are designed; therefore, the quality of the shape of a plate and a strip after leveling is greatly improved, the roller loss of the working roller is reduced, the phenomena of 'gnawing shoulders' and 'losing weight' of the supporting roller are eliminated, and the occurrence probability of accidental roller replacement is reduced to the maximum.

The invention relates to low-temperature steel for engineering machinery and a production method thereof. The steel is suitable for higher heat input welding and comprises the following chemical components by weight percent: 0.06-0.08% of C, 0.15-0.25% of Si, 1.6-1.9% of Mn, 0.05-0.07% of Nb, 0-0.30% of Mo, 0-0.0020% of B, 0.08-0.14% of Ti, 0.01-0.06% of Al, not more than 0.02% of P, not more than 0.010% of S, not more than 0.008% of N and the balance of Fe and inevitable impurities. The production method is characterized by controlling the heating temperature, precision rolling inlet temperature, finish rolling temperature, finished cooling temperature and annealing temperature. The material can ensure the transverse universal coiling impact energy at minus 20 DEG C to be more than 47J, and meanwhile, the HAZ (heat affected zone) strength and toughness of the steel plate can meet the mechanical property requirements of the base metal under 20KJ/cm welding property energy.

The invention provides a setting method and device for the roll bending force of a six-roller cold-rolling mill and belongs to the technical field of plate and strip cold rolling. The setting method comprises the steps that an equipment parameter, a strip parameter and a rolling process parameter of the six-roller cold-rolling mill are acquired, input into a roll bending force setting model and calculated correspondingly, so that the optimal roll bending force setting value of a working roller and the optimal roll bending force setting value of a middle roller are obtained and output. The optimal roll bending force setting values can be output through the method according to the roll bending force setting model. According to the setting method and device for the roll bending force of the six-roller cold-rolling mill, on the basis of a plate shape mechanism model, the physical relation between various influence elements and the optimal roll bending force is deeply analyzed, the definite mathematic relation between the roll bending force of the middle roller and the roll bending force of the working roller is determined according to the equipment parameter of the rolling mill, the six-roller cold-rolling mill roll bending force setting model which is strict in theory, definite in physical significance, quick, reliable, precise and reasonable is built, the setting calculation precision is further improved through model self adaption, and the good product plate shape quality is ensured.

The invention provides a high-efficiency dual-line plastic suction production method, comprising the steps as follows: 1) a bidirectional movable plastic suction heating furnace is arranged; the left side and the right side right below the plastic suction heating furnace are respectively provided with a set of vacuum forming processing line; 2) the plastic suction heating furnace is moved to the initial position and electrified to a given temperature, and the temperature is kept; 3) after the plastic suction heating furnace is transversely moved to one side right above the hot forming working position of the vacuum forming processing line, the plastic suction heating furnace vertically runs downwards to a given height H1 and remained for the time t1 so as to heat the material on the side of the processing line hot forming working position; 4) after the prearranged heating time t1 is reached, the plastic suction heating furnace runs upwards vertically and recovers transversely, and stops for a time t3; 5) the plastic suction heating furnace is moved to another processing line, runs downwards vertically by a height H2 and stops for a time t2; 6) the plastic suction heating furnace runs upwards vertically, transversely recovers and stops for a time t4; 7) the step 3) to step 6) are repeated. The invention also discloses a device which realizes the method of the invention.