Class / Patent application number | Description | Number of patent applications / Date published |
492001000 | METAL DEFORMING ROLL | 11 |
20080269032 | Multiple Piece Roll - The invention relates to the design of multiple piece rolls, in particular backup rolls, for the use in metal rolling. The roll comprises a main part with a center bore for the removal of center defects or flaws arising from the manufacturing process, e.g., from casing or forging and at least an end part, whereas the end part has no center bore or a center bore with a diameter smaller than the bore diameter of the main part. | 10-30-2008 |
20090280972 | ROLLING ROLL, ROLLING RING, ROLLING MILL, AND ROLLING ROLL ASSEMBLING METHOD - The present invention provides a rolling roll that has a shaft, which rotates around an axis and has one end that is connected to an output shaft of a rolling mill, and is configured such that a tubular sleeve member is mounted to a portion of the shaft on the side of another end, and a rolling ring, which is formed from a hard material, is fixed to an outer circumference of the sleeve member, wherein an inner circumferential support part is disposed on an outer circumferential side of the sleeve member; the rolling ring is supported by the sleeve member via the inner circumferential support part; a pressing member and a pressing mechanism are disposed on the other end side of the rolling ring; and the pressing member and the pressing mechanism press the rolling ring toward the one end side, thereby fixing it. | 11-12-2009 |
20100227749 | ROLLING BEARING DEVICE AND ROLL APPARATUS FOR CONTINUOUS CASTING INSTALLATION - A tapered roller thrust bearing is disposed in each of both sides in an axial direction of a cylindrical roller bearing with aligning housing ring which is provided with an inner ring, an outer ring, cylindrical rollers and an aligning housing ring. The tapered roller thrust bearing is constituted by disposing tapered rollers between a first raceway surface which is an outer side face in the axial direction of the outer ring and a second raceway surface of a side raceway ring disposed in an outer side in the axial direction of the outer ring. An intersection of lines extended from generatrices of each of the tapered rollers which are in contact with the first raceway surface and the second raceway surface, and an intersection of lines extended from the first raceway surface and the second raceway surface are disposed on a curvature center of the aligning sliding surface. | 09-09-2010 |
20120028772 | ROLLER COMPRISING A DRIVE SHAFT AND A ROLLER RING, AS WELL AS A METHOD FOR ASSEMBLING SUCH A ROLLER - The invention relates to a roller of the type that comprises, on one hand, a drive shaft, which has a cylindrical envelope surface having a certain outer diameter and a certain length, and, on the other hand, a shorter roller ring, which includes an outer ring of a hard material and an inner ring concentric with the same and of a more ductile material, which includes a cylindrical inside having a certain inner diameter and is, on one hand, permanently united to the outer ring in a metallurgical way, and, on the other hand, rotationally rigidly connected with the drive shaft in order to, from the same, transfer torque to the outer ring. According to the invention, the rotationally rigid joint between the drive shaft and the roller ring solely consists of a shrink-fit joint that is established between the envelope surface of the drive shaft and the inside of the inner ring and has an interference of at least 0.01% of the outer diameter of the drive shaft. | 02-02-2012 |
20130324384 | BEARING ARRANGEMENT AND ROLLING UNIT FOR A ROLLING-MILL ROLL - The invention relates to a bearing arrangement and a rolling unit for a rolling-mill roll. The bearing arrangement comprises a bearing housing, a bearing bush ( | 12-05-2013 |
20160023300 | METHOD FOR MANUFACTURING MILL ROLL, MILL ROLL AND MANUFACTURING APPARATUS OF MILL ROLL - A method for manufacturing a mill roll including a preheating process for joining end portions | 01-28-2016 |
492003000 | Specific composition | 5 |
20100304942 | PROCESS FOR THE PRODUCTION OF ROLLING MILL CAST ROLLS AND A ROLLING MILL CAST ROLL - The present invention is directed to a rolling mill cast roll with a higher resistance to adhesion and propagation of cracks, and the process for the manufacture thereof, said process comprising the steps of: introduction ( | 12-02-2010 |
20120225761 | FORGED ROLL MEETING THE REQUIREMENTS OF THE COLD ROLLING INDUSTRY AND A METHOD FOR PRODUCTION OF SUCH A ROLL - A forged roll for use, inter alia, in the cold rolling industry and a method of producing a forged roll as described. The roll has a steel composition, by weight, with 0.8 to less than 1% C, 0.2 to 0.5% Mn, 0.2 to 2.0% Si, 7.0 to 13.0% Cr, 0.6 to 1.6% Mo, more than 1.0 to 3.0% V, the remainder being Fe and impurities. The steel is tempered martensite with retained austenite at less than 5% per volume with eutectic carbides of less than 5% by volume, a hardness between 780-840 HV, and internal compressive stresses of between −300 to −500 MPa. | 09-06-2012 |
20140287898 | ROLL SURFACE LAYER MATERIAL FOR HOT ROLLING WITH EXCELLENT FATIGUE RESISTANCE PRODUCED BY CENTRIFUGAL CASTING, AND COMPOSITE ROLL FOR HOT ROLLING PRODUCED THROUGH CENTRIFUGAL CASTING - There is provided a roll surface layer material including a roll surface layer with excellent fatigue resistance. The roll surface layer material has a composition including, on a mass % basis, C: 2.3% to 2.9%, Si: 0.2% to 0.8%, Mn: 0.2% to 1.0%, Cr: 5.0% to 7.5%, Mo: 4.4% to 6.5%, V: 5.3% to 7.0%, Nb: 0.6% to 1.5%, and Co: 0.1% to 4.0% so as to satisfy 14.0≦(Mo+1.7V)≦17.0 (where Mo represents a content (mass %) of Mo and V represents a content (mass %) of V) and further including Al: 0.001% to 0.03% and/or REM: 0.001% to 0.03%, wherein a carbide is contained at an area fraction of 13% to 40%. A composite roll obtained by integrally welding a shaft member to the roll surface layer member is treated as a centrifugal cast roll that includes a surface layer with excellent fatigue resistance. | 09-25-2014 |
20150336353 | CENTRIFUGALLY CAST HOT-ROLLING COMPOSITE ROLL - A centrifugally cast hot-rolling composite roll comprising (a) an outer layer made of cast iron having a chemical composition comprising by mass 2.5-3.5% of C, 1.3-2.4% of Si, 0.2-1.5% of Mn, 3.5-5.0% of Ni, 0.8-1.5% of Cr, 2.5-5.0% of Mo, 1.8-4.0% of V, and 0.2-1.5% of Nb, the balance being Fe and inevitable impurities, a mass ratio of Nb/V being 0.1-0.7, and a mass ratio of Mo/V being 0.7-2.5, and meeting the condition of 2.5≦V+1.2Nb≦5.5, and having a structure comprising 0.3-10% by area of a graphite phase; (b) a shaft portion made of ductile cast iron in which the area ratio of ferrite is 35% or less; and (c) an intermediate cast iron layer. | 11-26-2015 |
20150376748 | ROLL OUTER LAYER MATERIAL, AND COMPOSITE ROLL FOR HOT ROLLING - A roll outer layer material contains small-size carbides having a circle equivalent diameter of 3 to 30 μm in a number of 500 to 2500 pieces/mm | 12-31-2015 |