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51. 发明专利

JPH01225182A TORQUE SENSOR 失效
公开(公告)号：JPH01225182A
公开(公告)日：1989-09-08
申请号：JP5081988
申请日：1988-03-04
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , YAHAGI SHINICHIRO , SAITOU TAKANOBU
IPC分类号： G01L3/10 , H01L41/20
摘要： PURPOSE:To accurately detect a torque by employing a steel haivng specific composition for a shaft to be measured as a material. CONSTITUTION:A torque sensor 1 has a shaft 2 to be measured, and coils (exciting means and detecting means) 5a, 5b. At least part of a shaft 2 to be measured is formed of a steel having a composition composed in wt.% of 0.25-1.5% of C, 1.0% or less of Si, 2.0% or less of Mn, any of 5.0% or less of Ni and 5.0% or less of Cr or both, and the balance of Fe and impurities. Thus, the strength of the shaft 2 to be measured is sufficiently obtained, sufficient output sensitivity necessary to detect a torque is obtained, hysteresis is reduced, and the torque can be accurately detected.

52. 发明专利

JPS63302334A TORSIONAL TORQUE MEASURING SHAFT 失效
公开(公告)号：JPS63302334A
公开(公告)日：1988-12-09
申请号：JP13802087
申请日：1987-06-01
申请人： DAIDO STEEL CO LTD
发明人： MIZUNO MASASHI , KOJIMA KATSUHIRO , OZAWA YOJI , SAITOU TAKANOBU
IPC分类号： G01L3/10
摘要： PURPOSE:To improve a durability by forming two groups of grooves on the surface of a shaft such that the grooves of each group are parallel to one another and inclined with respect to the axis of the shaft while keeping the ratio of the interval between the adjacent grooves to the width of each groove within a prescribed range. CONSTITUTION:A plurality of grooves 4 are formed in measuring regions 2 and 3 on the circumferential surface of a shaft 1 to be measured such that the grooves in each group 2 or 3 are parallel to one another, inclined with respect to the axis of the shaft and the adjacent grooves 4 have such spacings therebetween that the ratio of the distance (a) of a portion 5 between the adjacent grooves 4 to the width (b) of the groove 4 is within a range of 3:1-0.5:1. Torque detecting coils 6 and 7 are arranged around the regions 2 and 3, respectively. when a torsional torque is applied to the shaft 1, magnetic characteristics in the regions 2 and 3 largely change and changes are detected by the coils 6 and 7. Therefore, whether the arrangement of the coils 6 and 7 is proper can be visually confirmed and a durability in use can be improved by forming the grooves 4.

53. 发明专利

JPS62179626A TORQUE DETECTOR 失效
公开(公告)号：JPS62179626A
公开(公告)日：1987-08-06
申请号：JP2123586
申请日：1986-02-04
申请人： NISSAN MOTOR , DAIDO STEEL CO LTD
发明人： AOKI HIROYUKI , SHIMADA MUNEKATSU , NAKANISHI EIZABURO , YAHAGI SHINICHIRO , SAITOU TAKANOBU
IPC分类号： H02K11/00 , G01L3/10
摘要： PURPOSE:To accurately detect a torque acting on a shaft, free from changes in the output due to the rotation of the shaft, by repeated application of a twist torque to the surface of the shaft being measured to make the local anisotropy of magnetic permeability thereof isotropic. CONSTITUTION:A yoke 4 comprising an exciting coil 2 and a detection coil 3 is arranged close to a hardened or annealed shaft 1 of magnetic substance to form a magnetic circuit by a magnetic flux of a coil 2 to detect a magnetostrictive component passing through the shaft 1 with the coil 3. When a torque T, clockwise or counterclockwise, is applied to the shaft 1, the magnetic permeability increases or decreases by +sigma or -sigma and the sum thereof is captured as output. First, a twist torque is applied to the shaft 1 exceeding the plastic range thereof, then, the opposite way torque is applied after returned to zero and likewise, a torque being lowered gradually is applied repeatedly. This can turn the local anisotropy of the magnetic permeability of the surface part of the shaft isotropic, thereby eliminating changes in the output of the shaft to stabilize it. This enables accurate detection of torque acting on the shaft.

54. 发明专利

JPS6293342A SOFT MAGNETIC MATERIAL 失效
公开(公告)号：JPS6293342A
公开(公告)日：1987-04-28
申请号：JP22994085
申请日：1985-10-17
申请人： DAIDO STEEL CO LTD
发明人： YAHAGI SHINICHIRO , SAITOU TAKANOBU
IPC分类号： H01F1/14 , C22C38/00 , C22C38/10 , C22C38/30
摘要： PURPOSE:To manufacture a sheet-like soft magnetic material improved n electrical resistivity without causing too much deterioration in saturation magnetic flux density, by subjecting a molten Fe-Co alloy steel having a specific composition to very rapid cooling t form it into sheet-like state. CONSTITUTION:The molten Fe-Co alloy steel containing, by weight, 10-35% Co or further =2 elements among Si, Al, Cr, V, Nb, Ta, Ti, Mo, W, Zr, etc., is cooled very rapidly by means of single roll method, double roll method, etc., to be formed into sheet-like state, which is heated to 850-900 deg.C and then cooled at >=100 deg.C/hr cooling rate. In this way, the soft magnetic material improved in electrical resistivity without causing too much deterioration in saturation magnetic flux density and suitable for use in iron core for small-sized relay, iron core for small-sized motor, diaphragm for telephone set, etc., can be obtained.

55. 发明专利

JPS61190905A YOKE FOR DOT-PRINTER HEAT 失效
公开(公告)号：JPS61190905A
公开(公告)日：1986-08-25
申请号：JP3115185
申请日：1985-02-19
申请人： DAIDO STEEL CO LTD
发明人： YAHAGI SHINICHIRO , KATO TOSHIHIRO , SAITOU TAKANOBU
IPC分类号： C22C38/00 , B41J2/235 , C22C38/06 , C22C38/08 , C22C38/60 , H01F3/00 , H01F7/06
摘要： PURPOSE:To enable to perform a high-speed printing by a method wherein the title yoke is formed with a magnetic soft steel material, and the content of C, Si and Al is specified. CONSTITUTION:The title yoke is formed by casting the soft magnetic material fundamentally consisting of 10% or less of C, 10.0% or less of Si, 10.0% or less of Al, and Fe and unavoidable impurities for the remainder. C reduces permeability and corrosion resistance. Si improves magnetic characteristics, it makes electric resistance larger and reduces an eddy current. Also, the oxygen which gives adverse effect on magnetic characteristics is removed by a deoxidizing function. If the content of oxygen is small in quantity, the above-mentioned effect can not be obtained sufficiently, and if the content of oxygen is too much, the castability is impaired, and the manufactured article become fragile. Al increases electric resistance, and it is effective for improvement in magnetic characteristics. Also, Al increases the workability of the yoke by improving the flagility caused by the usage of a large quantity of Si, but as it increased the coersive force which is undesirable as the material for a magnetic core, it is added in the minimum quantity required in accordance with the quantity of Si to be added. If the quantity of Al is too much, it impairs castability.

56. 发明专利

JPS61183443A LOW THERMAL EXPANSION MATERIAL 失效
公开(公告)号：JPS61183443A
公开(公告)日：1986-08-16
申请号：JP2266285
申请日：1985-02-07
申请人： DAIDO STEEL CO LTD
发明人： YAHAGI SHINICHIRO , KATO TOSHIHIRO , SAITOU TAKANOBU
IPC分类号： C22C38/00 , C22C19/03 , C22C30/00 , C22C38/08 , C22C38/52
摘要： PURPOSE:To obtain a low thermal expansion material having high strength in an annealed state by adding specified percentages of Ni, C, Si, Mn, Al, etc. to Fe. CONSTITUTION:A low thermal expansion material consisting of, by weight, 25-50% Ni,

57. 发明专利

JP2003197416A METHOD OF MANUFACTURING POWDER MAGNETIC CORE, AND POWDER MAGNETIC CORE MANUFACTURED BY THE METHOD 审中-公开
公开(公告)号：JP2003197416A
公开(公告)日：2003-07-11
申请号：JP2001395005
申请日：2001-12-26
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： H01F1/24
摘要： PROBLEM TO BE SOLVED: To provide a powder magnetic core of low core loss and its method of manufacturing. SOLUTION: The method of manufacturing the powder magnetic core comprises processes of using soft magnetic powder, having weight average particle diameter of 50 μm or less, mixing 1 to 10 part by weight of aqueous solution whose concentration of phosphoric acid or a solute component, which contains phosphoric acid as the essential component is 0.5 to 50 mass % to 10 part by weight of the starting material; a process of coating the surface of the soft magnetic powder by insulating coating; a process of mixing 0.25 to 5 mass % of liquid glass whose concentration of solute component is 1 to 50% by weight to the powder having mass part equivalent to 100 mass part of the starting material, as the reduced quantity of the solute component in the powder obtained, and a process of performing compression molding to the mixture obtained. COPYRIGHT: (C)2003,JPO

58. 发明专利

JP2003147437A METHOD FOR HARDENING BLADE EDGE 审中-公开
公开(公告)号：JP2003147437A
公开(公告)日：2003-05-21
申请号：JP2001343755
申请日：2001-11-08
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： C21D1/10 , C21D9/18 , C21D9/22 , C21D9/24 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide a method for hardening a blade edge with an induction heating system. SOLUTION: In the method for hardening the blade edge 3a with the induction heating system using a core material 2 disposed in an exciting coil 1 for supplying a high frequency current, this hardening method for blade edge is performed by using a compressed powdery magnetic core consisting of soft magnetic powder and an insulating agent containing Si and/or Al as the core material 2 and composed of

59. 发明专利

JP2002141213A DUST CORE 失效
公开(公告)号：JP2002141213A
公开(公告)日：2002-05-17
申请号：JP2001134466
申请日：2001-05-01
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： H01F1/22
摘要： PROBLEM TO BE SOLVED: To provide a dust core whose permeability is hardly deteriorated even when an applied magnetic field is increased in intensity. SOLUTION: This dust core is mainly formed of Fe-based soft magnetic powder, if that initial permeability is represented by μ0, and permeability is represented by μ, when an applied magnetic field is 24 kA/m, μ0 and μ meet a formula, μ/μ0>=0.5, and the dust core is composed of 60 to 75 vol.% soft magnetic powder, having an aspect ratio (L2/L1) of 1 to 1.5 and the residual vol.% insulating binder, and the insulating binder content amounts to 5 to 20 pts.wt. with respect to 100 pts.wt. soft magnetic powder.

60. 发明专利

JP2002075720A DUST CORE 失效
公开(公告)号：JP2002075720A
公开(公告)日：2002-03-15
申请号：JP2000259437
申请日：2000-08-29
申请人： DAIDO STEEL CO LTD
发明人： TAKEMOTO SATOSHI , SAITOU TAKANOBU
IPC分类号： H01F1/24 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a dust core which is high enough in saturation magnetic flux density, mechanical strength, and electrical resistivity. SOLUTION: A magnetic core is formed of Fe-Si soft magnetic powder each equipped with an insulating film. The magnetic powder contains 0.5 to 5.0(%) Si, and the average aspect ratio of each particle ranges from 1.5 to 3.0, so that a dust magnetic core having magnetic flux density 1 (T) or higher, bending strength 80 (MPa) or above, and electric resistivity 500 (μΩ.cm) or higher can be obtained. Furthermore, the average grain diameter of the magnetic powder is 30 to 100 (μm), so that the dust magnetic core can be improved more in saturation magnetic flux density and electrical resistivity.

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