Patent application number | Description | Published |
20110239045 | EVALUATING APPARATUS AND EVALUATING PROGRAM PRODUCT - According to one embodiment, an evaluating apparatus includes an operation data storage unit, a labeling unit, a learning unit, and an evaluating unit. The labeling unit applies a failure label, indicating that a product is broken down, to operation data of the product that is broken down within a designated period of time from the observation date of the operation data, while applies a non-failure label, indicating that the product is not broken down, to the operation data of the product that is not broken down within a designated period of time from the observation date of the operation data. The labeling unit applies neither the failure label nor the non-failure label to the operation data of the product, which is not certain that it is broken down or not within a designated period of time from the observation date of the operation data. | 09-29-2011 |
20120065933 | MAINTENANCE SYSTEM AND MAINTENANCE METHOD - According to one embodiment, a measurement unit periodically measures a usage status of a measurement target, and measures each test item of the measurement target at an arbitrary timing according to a test schedule. A first storage unit stores the usage status and a test result in time series. A second storage unit stores statistic information representing a relationship between the usage status and the test result. A probability calculation unit calculates a first evaluation value representing a load of the measurement target at a recent timing and a second evaluation value representing a load of the measurement target at the arbitrary timing, based on the usage status, and calculates a specific probability of each test item, based on the statistic information, the first evaluation value and the second evaluation value. A test schedule creation unit creates a new test schedule having selected test items, based on the specific probability. | 03-15-2012 |
20120221272 | QUALITY ESTIMATION APPARATUS, QUALITY ESTIMATION METHOD AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING PROGRAM - According to one embodiment, a quality estimation apparatus includes: a storage module which stores designation information for designating inspection targets to be subjected to sampling inspection in estimation targets including the inspection targets and non-inspection targets, characteristic values obtained by the sampling inspection of the inspection targets and criterion information for determining qualities of the inspection targets based on the characteristic values; a threshold value calculator which calculates threshold values indicating qualities of the inspection targets from the characteristic values of the inspection targets by using the criterion information; and a clustering module which classifies the estimation targets in clusters so that the clusters have probability distributions with the threshold values used as a variable. | 08-30-2012 |
20140142862 | BEHAVIOR ESTIMATION APPARATUS, THRESHOLD CALCULATION APPARATUS, BEHAVIOR ESTIMATION METHOD AND NON-TRANSITORY COMPUTER READABLE MEDIUM THEREOF - According to one embodiment, a behavior estimation apparatus includes a storage unit, a first calculation unit, a second calculation unit, and an estimation unit. The storage unit stores first data collecting power values consumed by a consumer in a period. The first calculation unit calculates second data representing a frequency of each power value by using the first data. The second calculation unit calculates a first threshold to divide a first power value from a second power value which is larger than and next to the first power value, among power values corresponding to maximal values of frequencies included in the second data. The estimation unit obtains a power value consumed by the consumer in an estimating period, and estimates the consumer's behavior status in the estimating period by using the power value and the first threshold. | 05-22-2014 |
Patent application number | Description | Published |
20080257716 | Coating Method and Apparatus, a Permanent Magnet, and Manufacturing Method Thereof - A film is formed at a high rate on the surface of an iron-boron-rare-earth-metal magnet having a given shape, while effectively using dysprosium or terbium as a film-forming material. Thus, productivity is improved and a permanent magnet can be produced at low cost. A permanent magnet is produced through a film formation step in which a film of dysprosium is formed on the surface of an iron-boron-rare-earth-metal magnet of a given shape and a diffusion step in which the magnet coated is subjected to a heat treatment at a given temperature to cause the dysprosium deposited on the surface to diffuse into the grain boundary phase of the magnet. The film formation step comprises: a first step in which a treating chamber where this film formation is performed is heated to vaporize dysprosium which has been disposed in this treating chamber and thereby form a dysprosium vapor atmosphere having a given vapor pressure in the treating chamber; and a second step in which a magnet kept at a temperature lower than the internal temperature of the treating chamber is introduced into this treating chamber and the dysprosium is selectively deposited on the magnet surface based on a temperature difference between the treating chamber and the magnet until the magnet temperature reaches a given value. | 10-23-2008 |
20100159129 | COATING METHOD AND APPARATUS, A PERMANENT MAGNET, AND MANUFACTURING METHOD THEREOF - The object of the present invention is to improve the productivity of a permanent magnet and to manufacture it at a low cost by effectively coating Dy and Tb on a surface of the magnet of Fe—B-rare earth elements having a predetermined configuration. The permanent magnet of the present invention is manufactured by a coating step for coating Dy on the surface of the magnet of Fe—B-rare earth elements having a predetermined configuration and a diffusing step for diffusing Dy coated on the surface of the magnet into crystal grain boundary phases of the magnet with being heat treated at a predetermined temperature. In this case, the coating step comprises a first step for heating a process chamber used for carrying out the coating step and generating metallic vapor atmosphere within the process chamber by vaporizing vaporizable metallic material previously arranged within the process chamber, and a second step for introducing into the process chamber the magnet held at a temperature lower than that within the process chamber and then selectively depositing the vaporizable metallic material on a surface of the magnet by an effect of temperature difference between the temperature within the process chamber and that of the magnet by the magnet reaches a predetermined temperature. | 06-24-2010 |
20110293829 | COATING METHOD AND APPARATUS, A PERMANENT MAGNET, AND MANUFACTURING METHOD THEREOF - The object of the present invention is to improve the productivity of a permanent magnet and to manufacture it at a low cost by effectively coating Dy and Tb on a surface of the magnet of Fe—B-rare earth elements having a predetermined configuration. The permanent magnet of the present invention is manufactured by a coating step for coating Dy on the surface of the magnet of Fe—B-rare earth elements having a predetermined configuration and a diffusing step for diffusing Dy coated on the surface of the magnet into crystal grain boundary phases of the magnet with being heat treated at a predetermined temperature. In this case, the coating step comprises a first step for heating a process chamber used for carrying out the coating step and generating metallic vapor atmosphere within the process chamber by vaporizing vaporizable metallic material previously arranged within the process chamber, and a second step for introducing into the process chamber the magnet held at a temperature lower than that within the process chamber and then selectively depositing the vaporizable metallic material on a surface of the magnet by an effect of temperature difference between the temperature within the process chamber and that of the magnet by the magnet reaches a predetermined temperature. | 12-01-2011 |
Patent application number | Description | Published |
20090101248 | Grain-Oriented Electrical Steel Sheet and Process for Producing the Same - The present invention provides a grain-oriented electrical steel sheet produced by a method for promoting secondary recrystallization without an inhibitor, the grain-oriented electrical steel sheet including 2.0% or more and 4.5% or less of Si and 0.01% or more and 0.5% or less of Mn on a mass % basis, wherein the number of oxide particles having a diameter of 1 to 3 μm among that (oxide particles) of containing Ca and/or Mg is 400 or less per unit area (1 cm | 04-23-2009 |
20120131982 | GRAIN ORIENTED ELECTRICAL STEEL SHEET - An electrical steel sheet contains, as components, by mass %, 0.005% or less of C, 1.0% to 8.0% of Si, and 0.005% to 1.0% of Mn; one or more selected from Nb, Ta, V, and Zr such that a total content thereof is 10 to 50 ppm; and the balance being Fe and unavoidable impurities, wherein at least 10% of the content of Nb, Ta, V, and Zr is in the form of precipitates; the precipitates have an average diameter (equivalent circle diameter) of 0.02 to 3 μm; and secondary recrystallized grains of the steel sheet have an average grain size of 5 mm or more. | 05-31-2012 |
20150243419 | METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET - In a method for producing a grain-oriented electrical steel sheet by hot rolling a steel slab containing, in terms of mass %, C: 0.001˜0.20%, Si: 1.0˜5.0%, Mn: 0.03˜1.0%, one or two of S and Se: 0.005˜0.040% in total, sol. Al: 0.003˜0.050% and N: 0.0010˜0.020%, subjecting to a cold rolling to a final thickness and to a primary recrystallization annealing, applying an annealing separator composed mainly of MgO and then subjecting to final annealing, a heating rate S | 08-27-2015 |
Patent application number | Description | Published |
20140202599 | METHOD FOR PRODUCING ORIENTED MAGNETIC STEEL SHEET - In a method of producing a grain-oriented electrical steel sheet by subjecting a coil for grain-oriented electrical steel sheet after cold rolling to a primary recrystallization annealing, applying an annealing separator thereon, and conducting final annealing, rapid heating is conducted at a rate of not less than 80° C./sec from 500° C. to 700° C. in the course of heating for the primary recrystallization annealing, and a temperature keeping treatment is conducted for 2 to 100 hours from 700° C. to 1000° C. in the course of heating for the final annealing, and further, the final annealing is preferably conducted by laying a thermal insulation material on an upper surface of a coil supporting stand in an annealing furnace used for the final annealing concentrically from the outer periphery of the coil supporting stand and over an area of not less than 20% of the radius of the coil supporting stand. | 07-24-2014 |
20140251514 | GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD OF PRODUCING THE SAME (AS AMENDED) - In a method of producing a grain-oriented electrical steel sheet by hot rolling a steel slab comprising C: 0.001˜0.10 mass %, Si: 1.0˜5.0 mass %, Mn: 0.01˜1.0 mass %, one or two of S and Se: 0.01˜0.05 mass % in total, sol. Al: 0.003˜0.050 mass % and N: 0.001˜0.020 mass %, cold rolling, subjecting to primary recrystallization annealing, applying an annealing separator and finally subjecting to final annealing, the primary recrystallization annealing is conducted so as to control a heating rate S1 between 500 and 600° C. to not less than 100° C./s and a heating rate S2 between 600 and 700° C. to not less than 30° C./s but not more than 0.6×S1, and as a main ingredient of the annealing separator is used MgO having an expected value μ(A) of citric acid activity distribution of 3.5˜3.8, a cumulative frequency F of 25˜45% when an activity A is not less than 4.0. | 09-11-2014 |
20140338794 | METHOD OF PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET HAVING EXCELLENT IRON LOSS PROPERTIES - In the production of a grain-oriented electrical steel sheet by hot rolling a steel slab comprising C: 0.001˜0.10 mass %, Si: 1.0˜5.0 mass %, Mn: 0.01˜0.5 mass %, sol. Al: 0.003˜0.050 mass %, N: 0.0010˜0.020 mass %, one or two selected from S and Se: 0.005˜0.040 mass % in total, cold rolling, primary recrystallization annealing, and final annealing, a heating rate S1 between a temperature T1 (° C.): 500+2×(NB−NA) and a temperature T2 (° C.): 600+2×(NB−NA) in a heating process of the primary recrystallization annealing is set to not less than 80° C./sec, and an average heating rate S2 from the temperature T2 to 750° C. is set to 0.1˜0.7 times of S1, whereby a grain-oriented electrical steel sheet having a low iron loss over a full length of a product coil is obtained. | 11-20-2014 |
20150007908 | METHOD FOR PRODUCING ORIENTED ELECTROMAGNETIC STEEL SHEET - In a method of producing a grain-oriented electrical steel sheet by hot-rolling a steel slab of a chemical composition containing C: 0.001˜0.10%, Si: 1.0˜5.0%, Mn: 0.01˜1.0%, at least one of S and Se: 0.01˜0.05% in total, sol. Al: 0.003˜0.050%, N: 0.001˜0.020% by mass, subjecting to cold rolling, a primary recrystallization annealing, application of an annealing separator mainly composed of MgO and a finish annealing, a temperature rising rate S1 between 500˜600° C. in the primary recrystallization annealing is made to not less than 100° C./s and a temperature rising rate S2 between 600˜700° C. is made to 30° C./s˜0.6×S1° C./s, while a total content W (mol %) of an element having an ionic radius of 0.6˜1.3 Å and an attracting force between the ion and oxygen of not more than 0.7 Å | 01-08-2015 |
Patent application number | Description | Published |
20150187473 | METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET - A method for producing a grain-oriented electrical steel sheet includes hot rolling a raw steel material containing C: 0.002˜0.10 mass %, Si: 2.0˜8.0 mass % and Mn: 0.005˜1.0 mass % to obtain a hot rolled sheet, subjecting the sheet after or without hot band annealing to one or two or more stage cold rollings including an intermediate annealing to obtain a cold rolled sheet having a final sheet thickness, subjecting the rolled sheet to decarburization annealing and primary recrystallization annealing, applying an annealing separator to the sheet surface and subjecting to a final annealing, when rapid heating is performed at a rate of at least 50° C./s in a range of 200˜700° C. of the decarburization annealing, the rolled sheet is subjected to holding at any temperature of 250˜600° C. for 1˜10 seconds to produce a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value. | 07-02-2015 |
20150194247 | METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET - In a method for producing a grain-oriented electrical steel sheet by hot rolling a steel slab having a chemical composition including C: 0.001˜0.10 mass %, Si: 1.0˜5.0 mass %, Mn: 0.01˜0.5 mass %, Al: less than 0.0100 mass %, each of S, Se, O and N: not more than 0.0050 mass % and the remainder being Fe and inevitable impurities, subjecting the resulting hot rolled sheet to a single cold rolling or two or more cold rollings sandwiching an intermediate annealing therebetween to a final thickness, subjecting to a primary recrystallization annealing, applying an annealing separator thereto and then subjecting to a finish annealing, a zone of 550˜700° C. in a heating process of the primary recrystallization annealing is rapidly heated at an average heating rate of 40˜200° C./s, while any temperature zone of 250˜550° C. is kept at a heating rate of not more than 10° C./s for 1˜10 seconds, whereby secondary recrystallized grains are refined to obtain a grain-oriented electrical steel sheet stably realizing a low iron loss. | 07-09-2015 |
20150318090 | GRAIN-ORIENTED ELECTRICAL STEEL SHEET - When a steel sheet containing Si: 2-5 mass % after cold rolling is subjected to a primary recrystallization annealing and a finishing annealing for secondary recrystallization to form a grain-oriented electrical steel sheet, the primary recrystallization annealing is performed by rapid heating in the heating process and temperature keeping treatment at a certain temperature in the course of the heating to thereby obtain a grain-oriented electrical steel sheet having plural peaks in a distribution of misorientation angle between crystal orientation of secondary recrystallized grains and Goss orientation, wherein misorientation angle of the second smallest peak among the plural peaks is preferably not less than 5° and a grain size of secondary recrystallized grains is not more than 15 mm. | 11-05-2015 |
Patent application number | Description | Published |
20150299819 | PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET - Grain-oriented electrical steel sheets with good magnetic properties are industrially stably produced, by using as the material, a steel slab having a predetermined composition, wherein after cold rolling and before the start of secondary recrystallization annealing, the cold rolled sheet is subjected to nitriding treatment with nitrogen content of 50 mass ppm or more and 1000 mass ppm or less, and a total content of 0.2 mass % to 15 mass % of a sulfide and/or sulfate is contained in an annealing separator, and a staying time in the temperature range of 300° C. to 800° C. in the heating stage of secondary recrystallization annealing of 5 hours or more is secured to precipitate silicon nitride (Si | 10-22-2015 |
20150318092 | PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRIMARY RECRYSTALLIZED STEEL SHEET FOR PRODUCTION OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET - A method for producing a grain-oriented electrical steel sheets includes subjecting a steel slab to hot rolling to obtain a hot rolled sheet, the steel slab having a specific composition; then subjecting the hot rolled sheet to annealing and rolling to obtain a cold rolled sheet; then subjecting the cold rolled sheet to nitriding treatment with a nitrogen increase of 50 to 1000 ppm, during or after primary recrystallization annealing; then applying an annealing separator on the cold rolled sheet; and setting the staying time in a temperature range of 300 to 800° C. in the secondary recrystallization annealing to 5 to 150 hours. | 11-05-2015 |
20150318094 | PRODUCTION METHOD FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRIMARY RECRYSTALLIZED STEEL SHEET FOR PRODUCTION OF GRAIN-ORIENTED ELECTRICAL STEEL SHEET - A method for producing grain-oriented electrical steel sheets includes subjecting a steel slab to hot rolling to obtain a hot rolled sheet, the steel slab having a composition consisting of, by mass % or mass ppm, C: 0.08% or less, Si: 2.0% to 4.5% and Mn: 0.5% or less, S, Se, and O: less than 50 ppm each, sol.Al: less than 100 ppm, N: 80 ppm or less, and the balance being Fe and incidental impurities, and satisfying the relation of sol.Al (ppm)−N (ppm)×(26.98/14.00)≦30 ppm; then subjecting the hot rolled sheet to annealing and rolling to obtain a cold rolled sheet; then subjecting the cold rolled sheet to nitriding treatment, under specific condition, before, during or after primary recrystallization annealing; then applying an annealing separator on the cold rolled sheet; and subjecting the cold rolled sheet to secondary recrystallization annealing. | 11-05-2015 |