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1.发明申请公开(公告)号：US20190107152A1
公开(公告)日：2019-04-11
申请号：US16088560
申请日：2017-04-04
申请人： JTEKT CORPORATION
CPC分类号： F16C33/64 , C21D1/18 , C21D1/64 , C21D1/667 , C21D6/004 , C21D9/40 , F16C19/364 , F16C33/58 , F16C33/62
摘要： A bearing ring for a roller bearing includes: an inner layer part that is formed of tempering martensite or sorbite; and a surface layer part that surrounds the entire periphery of the inner layer part, in which Vickers hardness of a surface thereof is larger than that of the inner layer, and which is formed of tempering martensite. A raceway portion of the surface layer part a portion that is in contact with at least one end of the rolling contact surface of the roller in an axial direction, and includes a first raceway portion at which compressive residual stress of the raceway surface is relatively high.
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公开(公告)号：US20170058374A1
公开(公告)日：2017-03-02
申请号：US15235643
申请日：2016-08-12
申请人： JTEKT CORPORATION
发明人： Towako MATSUI , Tsuyoshi MIKAMI , Katsuhiko KIZAWA
摘要： A hardening method for an annular workpiece made of metal includes a heating process that heats the annular workpiece to a hardening temperature; an analyzing process that obtains a diameter of the annular workpiece heated to the hardening temperature, and divides the heated annular workpiece into at least a small diameter portion and a large diameter portion based on the obtained diameter; and a cooling process that injects cooling liquid under an injection condition toward the annular workpiece that has been divided into at least the large diameter portion and the small diameter portion in the analyzing process such that a dimensional difference between the large diameter portion and the small diameter portion decreases, the injection condition for the large diameter portion being different from the injection condition for the small diameter portion.
摘要翻译： 由金属制成的环形工件的硬化方法包括将环形工件加热到硬化温度的加热过程; 获得加热到硬化温度的环状工件的直径的分析处理，并且基于获得的直径将加热的环形工件分成至少小直径部分和大直径部分; 以及冷却过程，其在分析过程中将注射状态下的冷却液喷射到至少分成大直径部分和小直径部分的环形工件，使得大直径部分和小直径之间的尺寸差 大直径部分的喷射条件与小径部分的喷射条件不同。
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3.发明申请公开(公告)号：US20190072132A1
公开(公告)日：2019-03-07
申请号：US16111528
申请日：2018-08-24
申请人： JTEKT CORPORATION
CPC分类号： F16C33/62 , F16C19/46 , F16C19/466 , F16C33/585 , F16C33/64 , F16C2202/04 , F16C2202/66 , F16C2223/10
摘要： A raceway of a roller bearing includes a first raceway whose raceway surface is under a relatively high compressive residual stress, and a second raceway whose raceway surface is under a compressive residual stress lower than the compressive residual stress applied to the raceway surface of the first raceway. The raceway surface of the second raceway has a Vickers hardness of 700 HV or more but less than 800 HV. The raceway surface of the first raceway includes a portion that is harder than the raceway surface of the second raceway and that is to be in contact with at least one of axial ends of a rolling contact surface of a roller. A rib includes a rib surface having a Vickers hardness of 450 HV or more but less than 550 HV.
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公开(公告)号：US20180305779A1
公开(公告)日：2018-10-25
申请号：US16021890
申请日：2018-06-28
申请人： JTEKT CORPORATION
CPC分类号： C21D1/667 , C21D1/42 , C21D6/004 , C21D6/005 , C21D6/008 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/44 , H05B6/101 , Y02P10/253
摘要： A heat treatment apparatus that thermally treats an annular workpiece formed of a steel material by inductively heating the workpiece includes a treatment tank in which the workpiece is set and thermally treated, a holding portion that holds the workpiece at a predetermined position, an induction heating coil that surrounds the workpiece to inductively heat the workpiece, and a cooling medium that cools surfaces of the workpiece during the induction heating of the workpiece.
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公开(公告)号：US20160108486A1
公开(公告)日：2016-04-21
申请号：US14876064
申请日：2015-10-06
申请人： JTEKT CORPORATION
摘要： A heat treatment apparatus that thermally treats an annular workpiece formed of a steel material by inductively heating the workpiece includes a treatment tank in which the workpiece is set and thermally treated, a holding portion that holds the workpiece at a predetermined position, an induction heating coil that surrounds the workpiece to inductively heat the workpiece, and a cooling medium that cools surfaces of the workpiece during the induction heating of the workpiece.
摘要翻译： 通过感应加热工件对由钢材形成的环状工件进行热处理的热处理装置包括处理槽，其中工件被设置和热处理，将工件保持在预定位置的保持部分，感应加热线圈 围绕工件感应加热工件;以及冷却介质，其在工件的感应加热期间冷却工件的表面。
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