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1. 发明专利

JP2010199328A Method of manufacturing dust core 有权
标题翻译：制造粉芯的方法
公开(公告)号：JP2010199328A
公开(公告)日：2010-09-09
申请号：JP2009043059
申请日：2009-02-25
申请人： Toyota Motor Corp , トヨタ自動車株式会社
发明人： SUGIYAMA MASAKI , YAMAGUCHI TOSHIYA , SAEGUSA SHINJIRO , AKIYAMA MITSUTOSHI
IPC分类号： H01F41/02 , B22F1/00 , B22F1/02 , B22F3/00 , B22F3/24 , H01F1/26
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a dust core such that after magnetic powder is pressed into the dust core, only a surface of the dust core is made preventive against rust without spoiling magnetic characteristics of the dust core. SOLUTION: The method of manufacturing the dust core includes steps of: pressing the magnetic powder comprising powder for dust core, formed by coating iron-based magnetic powder with an insulating layer, to form the dust core; forming a red rust layer containing Fe 2 C 3 on a surface of the dust core; and annealing the dust core while changing the red rust layer into a black rust layer, so that Fe 2 O 3 of the red rust layer changes into Fe 3 O 4 . COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种制造粉尘芯的方法，使得在磁粉被压入压粉芯中之后，只有防尘芯的表面防止防锈而不破坏防尘芯的磁特性。解决方案：制造压粉芯的方法包括以下步骤：将包含由铁基磁性粉末与绝缘层形成的粉芯的粉末压制成粉尘芯; 在防尘芯的表面上形成含有Fe C 3 的红锈层; 并且在将红锈层变成黑锈层的同时对灰尘芯进行退火，使得红锈层的Fe 2 3 3 变为Fe < / SB> 0 4 。版权所有（C）2010，JPO＆INPIT

2. 发明专利

JP2002275538A METHOD AND DEVICE FOR HEAT TREATMENT OF STEEL 失效
公开(公告)号：JP2002275538A
公开(公告)日：2002-09-25
申请号：JP2001074465
申请日：2001-03-15
申请人： TOYOTA MOTOR CORP
发明人： NISHIO MASAHIRO , AKIYAMA MITSUTOSHI
IPC分类号： F16F1/14 , C21D1/09 , C21D1/10 , C21D1/18 , C21D9/28
摘要： PROBLEM TO BE SOLVED: To easily set the direction of residual compressive stress given to steel to be the same as that of the stress exerted in the steel, and to improve the dimensional accuracy by suppressing the distortion. SOLUTION: The steel is twisted in a range in which no plastic deformation is generated, a part with the tensile stress exerted in the state is heat-treated, and untwisted after the cooling. The total of the difference of the residual tensile stress subtracted from the tensile stress exerted in the heat-treated part, and the stress added by the stress generated when a non-treated part is restored to an original shape by elasticity is remained as the compressive stress. The residual compressive stress in the steel is balanced by this treatment in the forward and reverse directions.

3. 发明专利

JP2001032016A HIGH FREQUENCY INDUCTION HEATING APPARATUS 失效
公开(公告)号：JP2001032016A
公开(公告)日：2001-02-06
申请号：JP20520899
申请日：1999-07-19
申请人： TOYOTA MOTOR CORP
发明人： NISHIO MASAHIRO , AKIYAMA MITSUTOSHI , SHIMADA TORU
IPC分类号： C21D1/10 , C21D1/42 , H05B6/06
摘要： PROBLEM TO BE SOLVED: To efficiently obtain a desired heating regardless of the shape of a material to be heated without necessarily needing a specified heating coil by arranging a core for collecting alternating magnetic field so as to be controllable to the position in the heating coil, in which the alternating magnetic field is generated by supplying high frequency current. SOLUTION: In a high frequency induction heating apparatus for executing the heat treatment of hardening, solution treatment, etc., by heating the material 110 to be heated, such as metal-made member, the alternating magnetic field is generated by supplying the high frequency current from a high frequency current source into the heating coil 121 and this alternating magnetic field is collected with T-shaped cores 131, 132 and impressed to the heating surface of the material 110 to be heated to induction-heat the surface. Further, these cores 131, 132 are controlled to the relative position to the heating coil 121 with a core position control means 100 composed of an actuator of a cylinder, etc., and a control part, etc., connected with this actuator with an air supplying passage, etc. In this way, the distance(d) between the cores 131, 132 and the step parts A, B, respectively, is held to the constant to uniformly heat the material 110 to be heated.

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