395 results about "Backup roll" patented technology

A roll changing apparatus for a four-high rolling mill comprises rails, provided in a rolling mill stand and on a work side of the rolling mill, for incoming and outgoing of a work roll assembly and a backup roll assembly, and a pusher, provided on a drive side or the work side of the rolling mill, for roll admission and withdrawal for both of work rolls and backup rolls. The roll changing apparatus can be modified into a side shift type roll changing apparatus with ease, at a low cost, and in a short time.

The invention relates to a high-alloy centrifugal compounding steelcasting support roll and a processing technique thereof. The high-alloy centrifugal compounding steelcasting support roll comprises the following chemical substances: a working layer containing 0.4-0.5 of C, 0.3-0.6 of Si, 0.4-0.8 of Mn, less than or equal to 0.035 of P, less than or equal to 0.03 of S, 3.5-4.5 of Cr, 0.2-1.0 of Ni and 0.2-0.5 of Mo, and the balance steel and impurities by weight; a core part containing 3.0-3.6 of C, 1.7-2.7 of Si, 0.2-1.0 of Mn, less than or equal to 0.08 of P, less than or equal to 0.01 of S, 0.01-0.04 of Re, 0.03-0.08 of Mg, less than or equal to 1.0 of Cr, less than or equal to 1.0 of Ni, less than or equal to 1.0of Mo, less than or equal to 1.0 of Cu, less than or equal to1.0 of V, and the balance iron and impurities by weight. Furthermore, the working layer is formed by horizontal type centrifugal pouring, the core part is formed by pouring, and the heat treatment is carried out in such a way that a trolley type high-temperature resistance furnace to heat a rough machining support roll in an austenite way and preserve the heat of the rough machining support roll. The invention has high abrasion resistance, high accident prevention and high working production ratio.

The invention provides a coating method by which plural coating solutions of a coating solution formed from organic EL material for formation of an organic EL layer in an organic EL element and another coating solution formed from organic photoelectric conversion element material for formation of an organic photoelectric conversion element layer can be coated to prepare a multilayer film with no damage of the organic EL layer and organic photoelectric conversion element layer, and also provides a coating apparatus with the coating method. It is a feature in the coating method that plural coating units each facing a backup roll and sandwiching a long length support with the backup roll are provided, and plural coating solutions are coated onto the support by the plural coating units to form a multilayer coating film, wherein the moving support is wound up by the continuously moving backup roll supporting the support.

The invention discloses a comma scraper coating machine capable of automatically adjusting an interval. The comma scraper coating machine comprises a rack (1); a backup roll assembly (2) is mounted on the rack (1); a comma scraper assembly (3) which is matched with the backup roll assembly and is used for coating is further mounted on the rack (1); an automatic inclined block adjusting device (4) is further arranged between the backup roll assembly (2) and the comma scraper assembly (3); and the comma scraper coating machine further comprises a precision detecting device (5) which is used for detecting a size of the interval between the comma scraper assembly (3) and the backup roll assembly (2), and is capable of feeding back detection information to the automatic inclined block adjusting device (4).

The invention discloses an upper and lower hot air type drying box used for single-sided printing or coating. The invention aims to solve the defects in the prior art that the drying time is long when single-sided air supply is carried out on the base material oil ink or coating layer top surface to affect the drying efficiency and transmission speed, or a drying oven is long, and an operation field is big. The technical scheme has the key point that the upper and lower hot air type drying box is composed of a box shell, a plurality of parallel base material backup rolls in the box shell, a plurality of upper hot air supply pipes above the base material backup rolls, an upper hot air equalizing chamber, an upper hot air transmission path and an upper air return chamber, wherein the slice base material enters from a feed port, is supported on the base material backup rolls to operate and is discharged from a discharge hole; and each upper hot air supply pipe is provided with an air supply outlet parallel to the top surface of the slice base material, wherein the top surface is provided with a printing or coating layer. The upper and lower hot air type drying box is characterized inthat a plurality of lower hot air supply pipes, a lower hot air equalizing chamber, a lower hot wind transmission path and a lower air return chamber are arranged below the base material backup rollsby the box shell; and each lower hot air supply pipe is provided with an air supply outlet parallel to the back surface of the slice base material, and the back surface is provided with a printing orcoating layer.

The invention discloses a preheat treatment method for a large-size forged steel supporting roller. The after-forging heat treatment process is technically characterized in that high-temperature normalizing and high-temperature tempering processes are adopted under the normalizing heating temperature of 800 to 970 DEG C and the heating rate of less than 90 DEG C/h; after the temperature is averaged, the heat insulation time is determined according to the diameter of a roller body of the supporting roller; the heat insulation time for the supporting roller with the diameter of Phi 1,000-1,700 mm is 10 to 40 hours; after the roller is cooled in air, high-temperature tempering is carried out under the tempering temperature of 500 to 750 DEG C and the heating rate of less than 60 DEG C/h; after the temperature is averaged, the heat insulation time is 40 to 90 hours. A hardening and tempering process is as follows: an oil quenching and high-temperature tempering process is adopted; the preheat temperature for the supporting roller is 550 to 700 DEG C and is insulated for 5 to 20 hours; then the supporting roller is heated to the quenching temperature of 800 to 970 DEG C under the heating rate of 80 DEG C/h; after the heat is insulated for certain time, oil quenching is carried out for cooling time of 100 to 400 min; once oil is discharged, tempering is carried out immediately under the tempering temperature of 500 to 750 DEG C and the heating rate of less than 50 DEG C/h; after being averaged, the temperature is insulated for 20 to 90 hours.

The invention discloses a hot rolling roller-containing bearing seat liner symmetry detection method and device. The detection method comprises a step of suspending a support roller and bearing seats when the bearing seats are in a roller-containing state, since the bearing seats are heavy (usually larger than 7t per piece) and symmetrical in the structure, line contact is formed by the bearing seats, the bearing, and the bus on the support roller, the axis of the support roller are in the symmetrical surfaces of bearing seat inner holes, then the origin of a coordinate system is established on the support roller axis, a laser tracker is used to carrying out multi-point detection on a bearing seat linear, and the symmetry numerical value after the assembly of the hot rolling roller-containing bearing seat liner is obtained. Compared with an existing roller-containing indirect detection method, the detected roller system symmetry is high, according to the a detection result, the deviation of the support roller axis from the bearing seat inner hole symmetrical surfaces is smaller than 0.05mm, the requirement of the symmetry design value 0.2mm after the assembly of the hot rolling roller-containing bearing seat liner is completely satisfied, compared with a method of removing the support roller and carrying out directly measuring by the bearing seat inner holes, the detection efficiency can be improved by more than 3 times, and the fast pace requirement of hot rolling production line roller changing is satisfied.

The invention discloses a support roll with a high abrasion resistant performance, which comprises the following chemical constituents by weight percent: 0.38 to 0.85 percent of C, 6.1 to 10.0 percent of Cr, 0.4 to 1.5 percent of Mo, 0.15 to 0.8 percent of V, as well as one or more of 0.35 to 1.20 percent of Si, 0.35 to 1.00 percent of Mn, 0.4 to 0.8 percent of Ni, 0.4 to 0.8 percent of Co, and Fe and unavoidable impurities in balancing amount. The invention further discloses a manufacturing method of the support roll; and the rigidity and the abrasion resistance of the support roll produced according to the manufacturing method are greatly improved.

The invention provides a rolling method for a flat-rolled metal material and a rolling apparatus for the method each capable of stably producing a flat-rolled metal material free from camber or having an extremely light camber. The method is a rolling method of a flat-rolled metal material executed by using a rolling mill including at least work rolls and backup rolls. The apparatus is a rolling mill for this method. A rolling direction force acting on roll chocks on the operator side and the driving, side of the work roll is measured, the difference of the rolling direction force between the operator side and the driving side is calculated and a left-right swivelling component of roll gap of the rolling mill is controlled on the basis of this difference.

An electrophotographic imaging device includes a print media transport assembly, and a fuser positioned in association with the print media transport assembly. The fuser includes a first heater assembly; a belt positioned around and adjacent to the first heater assembly; a backup roll positioned in opposition to the first heater assembly on a side of the belt opposite the first heater assembly, the belt and the backup roll defining a fusing nip therebetween; and a second heater assembly positioned in association with the backup roll.

The invention relates to the technical field for repairing an ultra-large type backup roll, in particular to a repair process of a forging steel backup roll with Phi2100* 3400mm. Firstly, welding is carried out on the rib of the backup roll: the roll body of the backup roll which needs to be welded is preheated to 250 DEG C, and the temperature is preserved for 10 hours; then the door of a furnace is opened, rib welding is carried out, zigzag welding is carried out every 100mm, and the length of the weld pass is 50-60mm; oxygen is used on the welded part immediately, and ethyne is used for warming the welded part until the welded part becomes blue. After the rib welding is finished, preheating treatment, temperature preservation treatment and destressing treatment are carried out respectively according to a heat treatment curve when the roll body of the backup roll is overlaid for making a bottom layer, a transition layer and a working layer. Compared with the prior art, in the technology of the invention, the influence on the service performance caused by the temperature circulation and change of a heat influencing region during the overlaying is considered, uniformity and penetration of preheating workpieces and uniformity of temperature between layers are guaranteed in the repair process, the blank in the repair rebirth field of the domestic ultra-large type backup roll is filled in. The time for repair is short, the service life is prolonged, and the cost is saved.

The invention relates to a moving mechanism of a brush of a dry brushing machine. The moving mechanism comprises a fixed bearing block, a movable bearing block, a guide track, a brush rotation motor and a brush linear moving motor, the brush is positioned above a backup roll, the guide track consists of a track and a slider mounted in the track, the slider is fixed onto the fixed bearing block, the track is fixed onto the movable bearing block, a rotating shaft of the brush is supported on the movable bearing block and is in transmission connection with an output shaft of the brush rotation motor by a retractable coupler, the movable bearing block is connected with an eccentric wheel by a connecting rod, and the eccentric wheel is mounted on an output shaft of the linear moving motor. By the aid of the moving mechanism, the brush not only can rotate, but also can linearly move along the direction of a brush shaft. The brush rotates while reciprocating axially, accordingly, capability of removing oxide scales and impurities on surfaces of strips is remarkably improved, the surface of the brush is worn uniformly due to axial reciprocation of the brush, and abrasion grinding maintenance period of the brush is prolonged.

A board thickness controller for a rolling machine which can fully reduce variation in board thickness arising from roll core eccentricity even in the event of deterioration over time of roll core eccentricity parameters or in any other cases. For such a purpose, the amount of roll core eccentricity is first determined from gauge meter board thickness and actual board thickness. Secondly, a curved surface corresponding to a distribution curve for the determined amount of roll core eccentricity is depicted to identify the curved surface using the Fourier analysis, thereby computing a phase and an amplitude of the roll core eccentricity for each of the upper and lower backup rolls. Subsequently, roll gaps are controlled in accordance with the computation result to reduce variation components in board thickness of an rolled material arising from the roll core eccentricity.

In the gravure coating apparatus, while a bead portion of a coating liquid is formed between a roll surface of a gravure roll to which the coating liquid is excessively supplied and a web that runs continuously, the web is pressed on the gravure roll by using a backup roll, whereby a desired amount of the coating liquid is applied to the web, a liquid supply device having an inclined surface that is inclined downward toward the roll surface and a gap too narrow for the coating liquid to flow down between the roll surface and the inclined surface is provided at a position near the bead portion on the upstream side in the direction of rotation of the gravure roll so that the coating liquid flows down on the inclined surface and is supplied to the gravure roll. A liquid return of an excess coating liquid that is not used for coating in the bead portion is less liable to occur, so that a streak trouble on a coating surface formed on the web can be prevented from occurring.

The invention relates to an automatic conveyor, which is characterized in that a conveying platform is arranged by taking a base as a support, the conveying platform is obliquely arranged along the conveying direction in a way that the part loading end of the conveying platform is high and the part unloading end of the conveying platform is low, and backup rolls which can rotate on the conveying platform form a conveying plane; and limiting mechanisms which can be lifted up or lowered down at proper time are respectively arranged at different positions on the conveying platform. The invention has the advantages that the structure is simple, the use is convenient, the application scope is wide for different parts to be conveyed and the logistic conveying method by using the gravity of the parts to be conveyed is not limited by the automation level.

The invention relates to the technical field of roll reparation techniques, in particular to a backup roll reparation technique. The backup roll reparation technique includes the following steps: (a) rough turning: rolls with the diameter of 500mm are turned to the diameter of 530mm, rolls with the diameter of 450mm are turned to the diameter of 430mm, and oil stains are cleaned up; (b) preheating; (c) intermediate layer surfacing; (d) hard surface layer surfacing: when the last roll is surfaced with an intermediate layer and mounted into a furnace, the furnace temperature is increased to 380 DEG C to 400 DEG C, and is kept for 2 hours, meanwhile, a welding wire and flux are replaced, the flux is also baked, the welding wire is deoiled and derusted, and a 324 welding wire with the diameter of 3.2mm and HJ107 flux are used; (e) tempering; (f) semi-finishing turning to the grinding allowance; (g) grinding; (h) secondary tempering. Compared with the prior art, the invention has the following advantages that: the technique steps are simple, the uniformity of rigidity of rolls can be ensured, and moreover, the machining cost is reduced.

An installation method of annular heating furnace equipment comprises the following steps: (1) the position of the central point is determined: a platform for measuring is arranged at the central point of the annular furnace, the platform is poured by using the reinforced concrete and an observation hole is reserved at the center of the platform; (2) installation of a furnace bottom ring beam: the center and radius of the ring beam are determined by using a total station, and leveling adjustment is carried out by adopting a precise leveling instrument; (3) the elevation and levelness of a backup roll are measured by adopting a special reference block on the backup roll of the annular furnace, and the centering of the backup roll is carried out by adopting a laser collimator in the installation operation of the backup roll of the annular furnace; and (4) the installation of a sector segment adopts the construction method of expanding towards both sides after fixing one sector segment, and the radius and angle of the sector segment are measured by adopting the total station. The installation method has the advantages that: 1. the stability of the measuring platform is good and is not easily influenced by the external factors; 2. the installation precision of the equipment is high; and 3. the construction time is shortened.