86results about How to "Reduce roll consumption" patented technology

The invention relates to a method for configuring the shape of a supporting roll of a four-high mill and the shape of a working roll thereof, belonging to the technical field of steel rolling. According to three types of width specifications of band steel which are most rolled by hot-rolling band steel production line, sixth-power polynomial supporting roll shape technology and second-power working roll shape curve are used for configuration so as to lead the contact length of the supporting roll and the working roll and the width of the rolled band steel to be fit. The method has the advantages of eliminating hazardous contact areas in which the parts of the two ends of the supporting roll with the flat roll shape and the working roll expand out of the edge of the band steel to generate large deflection and deformation, solving the problems that the stress concentration of the edges of the supporting roll and the working roll in a hot continuous mill for wide band steel causes stripping and the mill roll with the flat roll shape has large wearing capacity and is not even, reducing the consumption of the mill rill, saving energy, reducing consumption and reducing cost for rolling steel; and by the technical configuration of R2 working roll shape and the supporting roll shape, the invention solves the plate-shape problems that the middle blank generates negative convexity and the wedge shape is large, and improves the control precision of the shape of hot-rolled band steel.

The invention discloses a two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production. Four types of hole patterns including a transition hole pattern, a supporting hole pattern, a before-finished-product hole pattern and a finished product hole pattern are designed on a pair of rollers. The rolling technology comprises the steps of using the transition hole pattern (1) for rolling the continuous casting round billets, and turning over steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm to 90 mm per pass; using the supporting hole pattern for continuously rolling the drum-shaped rolled pieces obtained in the previous step to obtain rectangular or square rolled pieces which have regular shapes, and turning over the steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm 90 mm per pass; using the before-finished-product hole pattern (3) for rolling the rolled pieces to obtain rectangular or oval rolled pieces with reserved rolling reduction and reserved broadening quantity, and turning over the steel billets after rolling is accomplished, wherein the rolling reduction ranges from 20 mm to 90 mm per pass; using the finished product hole pattern for rolling one pass to obtain rolled pieces which are high in dimensional accuracy and product quality, wherein the rolling reduction of square or rectangular steel finished products ranges from 40 mm to 60 mm per pass, and the nominal rolling reduction of round steel ranges from 10 mm to 40 mm per pass.

It relates to a pile-up welding composite straightener roll and the preparation technique, belonging to the art of mechanical device, and it especially relates to a straighter roll for a plate hot straightening machine. The straightener roll uses alloy constructional steel 42CrMo wrought-steel as the base metal to prepare mandrel of roll body, and is built-up an operational layer of 5-15mm by thicken on the surface of the roll body, the chemical composition of the deposited material of the operational layer being: C:0.36-0.45%, Cr: 12.00-14.00%, Ni:2.00-2.50%, Mo: 2.00- 3.00%, W: 2.00- 3.00%, Ti: 0.85-1.25%, Si: <=1.50%, Mn: <= 2.00%, P<= 0.035%, and S: <=0.03%. In the technique it uses 1250 type automatic buried arc building-up device, applies bobbing building-up to build up the operation layer of roll body, and uses the 260 weld flux as the welding material. The straightener roll has a long work life and a high strength of roll body, and it can be repaired and reproduced a plural of times.

The invention belongs to the technology field of metal thermal treatment, which relates to the rolling technology of deformed steel used for a maglev train rail. The invention comprises the procedures in turn of rough rolling, finishing rolling, coolant-controlling and straightening, which is characterized in that two reversible mills rolling is adopted for rough rolling and the maximum rolling force of a two reversible mill is 8000 to 10000KN. And the rolling deformation should account for 60 to 90 per cent of total deformation. Three-stand universal continuous rolling line with high rolling force and high accuracy is adopted for finishing rolling to realize mixing roll under universal mode. The invention can merely use large H-shaped hot- rolling production line to produce finished products and does not require thermal treatment and machining process, with the result that the cost can be greatly reduced and the requirement of mass production can be fully satisfied.

The invention discloses a high-strength strip steel straightening, flattening and straightening process. The high-strength strip steel straightening, flattening and straightening process is characterized in that a hot rolling high-strength steel plate or strip steel sequentially passes through an inlet straightening machine, a temper mill and an outlet straightening machine, and by means of the combined working procedures of straightening, flattening and straightening, the adjustment of the plate shape, the surface quality, the mechanical performance and the residual stress of the strip steelis completed; the inlet straightening machine is used for conducting rough straightening on the strip steel, on the one hand, the plate shape of the supplied material is improved, and on the other hand, the scale on the surface of the strip steel is reduced; the temper mill is used for conducting flattening on the strip steel, the plate shape of the strip steel is improved, the mechanical performance of the strip steel is adjusted, and the surface quality of the strip steel is improved; and the outlet straightening machine is used for conducting precise straightening on the strip steel, the unquenched plate shape problems and newly-generated plate shape problems in the flattening process are solved, and the unquenched residual stress and newly-generated residual stress in the flattening process are eliminated.

The invention relates to a roll gap control method for a continuous casting machine by adopting stress as a control target, which belongs to the technical field of continuous casting in the metallurgy industry. The technical scheme includes that pressure sensors arranged in segments are used for detecting the stress of the segments, the roll gap of the continuous casting machine is controlled by adopting the stress of each segment as the control target, the stress target value of each segment is set before steel casting, the segment contracts the roll gap when a practical stress value is smaller than the target value during steel casting, and the segment releases the roll gap when the practical stress value is larger than the target value during steel casting. The roll gap control method has the advantages that the method solves the problems of drifting of a displacement sensor and the like which cannot be solved by a traditional roll gap control method adopting displacement as a control target, the internal quality of a casting blank is obviously improved, quality defects such as loosening, segregation and the like are decreased, the quality stability of the casting blank is improved, segregation and loosening of the casting blank can be completely controlled within C-type 2.0, and roll consumption of the segments can be reduced by about 50%.

The invention discloses a high-speed steel composite roller and a production method thereof. The high-speed steel composite roller comprises a roller shell and a mandrel, wherein the roller shell is composed of a high-speed steel layer and a plain carbon steel layer located in the high-speed steel layer in a composite mode, and the mandrel is made of forged steel. The assembling faces of the roller shell and the mandrel are in conical fit with the ratio of 40:1, and the assembling end of the mandrel and the matching face of the roller shell are locked through four to six countersunk bolts used as keys. According to the roller shell, part of high-speed steel is replaced by plain carbon steel, and the production cost of the roller is greatly lowered while the strength and abrasion resistance of the roller shell are guaranteed; the mandrel and the roller shell are detachably connected and can be repeatedly used, so that the production cost of the roller is further lowered; and the mandrel is made of the forged steel instead of nodular cast iron, the strength of the mandrel is improved, and the service life of the roller is prolonged.

The invention relates to a process for manufacturing large high-chromium medium-carbon alloy forging back-up rolls. The process includes the steps: firstly, forging a blank after smelting alloy steel and annealing the forged blank; secondly, performing rough turning, semi-fine turning and fine turning; and thirdly, polishing the forged blank to obtain a finished product. The large back-up rolls are manufactured by means of advanced full-automatic numerical control differential-temperature integral quenching heat treatment process, the hardening depth of each large back-up roll reaches and exceeds 100 millimeters, hardness uniformity of roll bodies is within two Shore hardness units, and the weight of a single roll exceeds that of each large back-up roll of 25 tons. The practical service lift of the rolls is greatly prolonged, roll consumption is reduced, production cost is saved, and high-precision wide strips with even and smooth rolled plate surfaces can be used for automobile manufacture, space shuttle and national defense industry.

The invention relates to an intermediate roller contour, in particular to an intermediate roller contour of an intermediate roller movable type convexity high-accuracy control temper mill. The intermediate roller contour of the intermediate roller movable type convexity high-accuracy control temper mill consists of three continuous line segments, wherein a polynomial curve equation of a head roller contour is y=A2x<2>+A4x<4>+A6x<6>+A8x<8> by taking a crossing point of a head part and an intermediate segment as an origin of coordinates, axial direction of the intermediate roller as an X axis and radial direction of the intermediate roller as a Y axis; and in the equation, the origin of coordinates is the crossing point of the head roller contour and the intermediate segment, the axial direction of the intermediate roller is the X axis, the radial direction of the intermediate roller is the Y axis, R' is radius difference between roller bodies of two roller-shaped ends of the head, and L1 is more than 0 and less than or equal to L/3 and the R' is more than 0 and less than R. Through the roller contour, a forced-contact condition is greatly relieved, contact pressure between rollers is uniformly distributed, a peak value of the contact pressure is greatly reduced, the improvement on the service periods of the rollers is facilitated, a set value of rolling force is reduced, the service life of the rollers is prolonged, and the risk of roller spalling is reduced.

The invention provides a technical scheme of a roll allocation method and device for optimization of a roll pass system. The scheme comprises three types of rolls with the specifications of phi 610*760, phi 770*1000 and phi 860*1200, a guide mechanism used for guiding steel materials and a cooling mechanism used for cooling the steel materials. The roll allocation method and device for optimization of the roll pass system are characterized in that the three specifications of rolls are semi-steel rolls with the carbon content of 1.6%, each of the three specifications of rolls is additionally provided with a roll groove on the premise that the safety factor of roll rings is 0.6-0.9, and the section area of each roll groove is smaller than or equal to the section area of original roll grooves of the three specifications of rolls. Meanwhile, in order to adapt to the variation of the roll grooves of the rolls, the guide mechanism and the cooling mechanism are modified, the single-groove rolling amount of the rolls is largely improved, and the problems of low work efficiency and heavy workloads on technical personnel caused by frequent replacement of the rolls are avoided.

The invention relates to a rolling mill laser deviation preventing device. The rolling mill laser deviation preventing device is provided with a fixed vertical column. A base is arranged on the fixedvertical column. Two supports are arranged side by side on the base. A horizontally arranged guide slide bar is arranged between the two supports. A feed screw rod is arranged parallel to the guide slide bar. The two ends of the feed screw rod are arranged on the two supports through bearings respectively. The position of the feed screw rod is higher than the height of the guide slide bar. A handwheel is also arranged at one end of the feed screw rod. A screw rod seat is connected to the feed screw rod in a threaded mode. The outer wall of the screw rod seat is also provided with a sliding sleeve. The sliding sleeve sleeves the guide slide bar and slides along the guide slide bar for adjustment. The screw rod seat is also provided with a laser transmitter. A laser beam emitted by the laser transmitter is used for aligning with the side line of strip steel to be rolled. The rolling mill laser deviation preventing device can reduce roller consumption and mass loss, and can realize stripsteel width 700-1260mm free conversion and monitoring, simple overhaul, maintenance and adjustment. The equipment is durable.

The invention relates to a transportation roller way for sectional material processing, in particular to a hollow roll for a roller way. The hollow roll comprises a roll body (1), a driving side extremity piece (2), a driven side extremity piece (3), a driving side spindle head (6) and a driven side spindle head (8), wherein the driving side extremity piece (2) and the driven side extremity piece (3) are respectively located at two ends of the roll body (1) through grafting type coordination, and the roll body (1), the driving side extremity piece (2) and the driven side extremity piece (3) are detachably and fixedly connected into a whole; the grafting type coordination is formed by a plug (4) and a slot which are coordinated. The invention can realize the rapid maintenance of the roller way, improve the quality of the surface of a rolled piece, reduce the maintenance time, and increase the utilization ratio of a rolling production line and the yield of the sectional material. The replaced roll body is maintained offline and is not influenced by time and fields, which can ensure the quality of the maintained roll body and the surface thereof, thereby the roll consumption is reduced. The invention is suitable for various transportation roller ways.

The invention discloses a checkered plate roller. The surface of the roller is provided with lentil-shaped figure pressing grooves and is characterized in that the opening edge of each figure pressing groove is composed of two arcs which are symmetrical to each other, the opening lengths of the figure pressing grooves range from 30 mm to 35 mm, the opening widths of the figure pressing grooves range from 5 mm to 10 mm, the bottoms of the figure pressing grooves in the length direction are of an arc shape, an included angle between the two groove ledge surfaces in each figure pressing groove ranges from 80-85 degrees and the bottoms are smoothly connected by arcs with radii of 1.5-3.5 mm, and the largest depths of the bottoms of the figure pressing grooves range from 4-5 mm. According to the checkered plate roller and a using method thereof, the single engraved roller using times of the checkered plate special roller are increased and the roller consumption is reduced by optimizing the parameters of the figure pressing grooves of the checkered plate roller and the using technology of the roller.