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公开(公告)号：US20170014972A1
公开(公告)日：2017-01-19
申请号：US15209174
申请日：2016-07-13
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
IPC分类号： B24D7/02
摘要： A grinding wheel includes a disc-like member and a grinding stone layer disposed on an outer peripheral surface of the disc-like member. A grinding surface of the grinding stone layer includes a cylinder grinding surface, end grinding surfaces, and corner grinding surfaces. The grinding stone layer includes a cylindrical-portion grinding stone layer including a part of the corner grinding surfaces and the cylinder grinding surface, and end grinding stone layers including the remaining part of the respective corner grinding surfaces and the respective end grinding surfaces and having a property different from a property of the cylindrical-portion grinding stone layer. Joint surfaces are each formed by joining a boundary surface of the cylindrical-portion grinding stone layer and a boundary surface of the end grinding stone layer such that the boundary surfaces have a preset inclination α to an axis of rotation.
摘要翻译： 砂轮包括盘状构件和设置在盘状构件的外周表面上的研磨石层。 磨石层的磨削表面包括圆柱磨削表面，端部研磨表面和角磨削表面。 研磨石层包括：圆柱形磨石层，其包括一部分角磨削表面和圆柱磨削表面，以及包括各个角磨削表面的剩余部分和各个端部研磨表面的端部磨石层，并且具有 性质不同于圆柱形磨石层的性质。 接合面各自通过将圆筒部磨石层的边界面和端部研磨石层的边界面接合而形成，使得边界面具有与旋转轴线的预设倾斜角α。
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公开(公告)号：US20160236321A1
公开(公告)日：2016-08-18
申请号：US15029931
申请日：2014-10-16
申请人： JTEKT CORPORATION
发明人： Akira WATANABE , Masahiro IDO , Yoshihiro MIZUTANI
IPC分类号： B24B53/06
CPC分类号： B24B53/06 , B24B5/42 , B24B53/003 , B24B53/062
摘要： In a state where a first truer rotation axis is maintained parallel to a grindstone rotation axis, a grindstone outer circumferential surface, and outer circumference arcuate surfaces which are partial surfaces of grindstone arcuate surfaces, and which are continuous to the grindstone outer circumferential surface are trued by using a first truer. In a state where a second truer rotation axis is maintained in a direction perpendicular to the grindstone rotation axis, grindstone end surfaces, and end surface arcuate surfaces which are remaining surfaces of the grindstone arcuate surfaces, and which are continuous to the grindstone end surfaces are trued by using a second truer.
摘要翻译： 在第一真正旋转轴保持平行于砂轮旋转轴的状态下，磨石外周面和作为磨石圆弧面的局部表面的外周圆弧面被修整，并且与砂轮外周面连续的状态 通过使用第一个更真实。 在第二修整器旋转轴线保持在与砂轮旋转轴线垂直的方向的状态下，磨石端面和作为磨石端面的连续的磨石拱形表面的剩余表面的端面弧形表面是 通过使用第二个修复器来修复。
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公开(公告)号：US20180193976A1
公开(公告)日：2018-07-12
申请号：US15860132
申请日：2018-01-02
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
CPC分类号： B24B41/007 , B24B5/04 , B24B7/06 , B24B41/042 , B24B49/10
摘要： A grinding apparatus includes grinding wheel side vibrational displacement calculation devices that obtain a vibrational displacement of a grinding wheel resulting from a vibration in an approaching/separating direction of the grinding wheel; main spindle side vibrational displacement calculation devices that obtain a vibrational displacement of a workpiece generated by propagation of the vibration in the approaching/separating direction of the grinding wheel; a relative vibrational displacement calculation unit that obtains a relative vibrational displacement between the grinding wheel and the workpiece based on the vibrational displacement of the grinding wheel and the vibrational displacement of the workpiece that have been obtained; a position change unit that creates, based on the obtained relative vibrational displacement between the grinding wheel and the workpiece, a position change command to change a position of the wheel spindle stock; and a processing controller that grinds the workpiece W based on the created position change command.
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公开(公告)号：US20170348828A1
公开(公告)日：2017-12-07
申请号：US15523035
申请日：2015-10-30
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
CPC分类号： B24D5/06 , B24D5/14 , B24D18/0009
摘要： A grinding wheel includes a disc-like member and a grinding layer disposed on an outer peripheral surface of the disc-like member. The grinding layer includes a plurality of circumferentially-divided grinding chips which are divided in a circumferential direction. Each of the circumferentially-divided grinding chips is formed by arranging a first grinding chip and a second grinding chip in the axis direction, the first grinding chip and the second grinding chip having different properties. A boundary portion between the first grinding chip and the second grinding chip of at least three circumferentially-divided grinding chips continuously arranged in the circumferential direction are arranged toward a predetermined direction in the axis direction in the order in which the circumferentially-divided grinding chips are arranged.
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公开(公告)号：US20170165806A1
公开(公告)日：2017-06-15
申请号：US15373527
申请日：2016-12-09
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
IPC分类号： B24B53/12
CPC分类号： B24B53/12
摘要： A truer includes: a core formed into a truncated cone; and an abrasive grain layer fixed onto an outer peripheral surface of the core. The core includes: a base that is a small-diameter portion of the truncated cone and has a disc shape; and a tubular member extending from an outer peripheral edge of the base in the direction in which a rotation axis of the truncated cone extends. The tubular member has a hollow tubular shape. The tubular member includes an outer peripheral surface tapered so that a portion of the tubular member opposite to the base and adjacent to an extremity of the tubular member is a large-diameter portion of the truncated cone. A recess opening toward the extremity is defined inward of the tubular member.
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公开(公告)号：US20170008145A1
公开(公告)日：2017-01-12
申请号：US15200525
申请日：2016-07-01
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
摘要： In a cylindrical grinding method, rough grinding is performed until a diameter of a workpiece reaches a rough-grinding setting value, and then, first finish grinding is performed until the diameter of the workpiece reaches a first finish setting value while measuring a shape deviation amount of an outer peripheral surface of the workpiece from a perfect round shape. The rough-grinding setting value in the next-time rough grinding step is changed based on a necessary time of the first finish grinding step to time at which the shape deviation amount reaches a first threshold or smaller in the first finish grinding step, and based on a total required time for the first finish grinding step.
摘要翻译： 在圆柱形研磨方法中，进行粗磨，直到工件的直径达到粗磨设定值，然后进行第一精磨，直到工件的直径达到第一精加工设定值，同时测量形状偏差量 的工件的外周表面从完美的圆形形状。 基于第一精磨工序的必要时间与第一精磨工序中的形状偏差量达到第一阈值以下的时间，基于下一次粗磨阶段的粗磨设定值，基于 在第一次精磨阶段的总需要时间。
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7.发明申请公开(公告)号：US20170350482A1
公开(公告)日：2017-12-07
申请号：US15606681
申请日：2017-05-26
申请人： JTEKT CORPORATION
发明人： Toshihiro ASAKURA , Takuya NAKAYAMA , Keisuke OGAWA , Hajime KURIKI , Akira WATANABE , Tatsuya SEKIGUCHI
IPC分类号： F16H25/22 , B23K11/00 , B21D9/04 , B62D3/08 , B62D3/04 , F16H25/18 , B62D3/02 , B62D3/06 , F16H25/20
CPC分类号： F16H25/2223 , B21D9/04 , B23K11/002 , B62D3/02 , B62D3/04 , B62D3/06 , B62D3/08 , F16H25/18 , F16H25/20 , F16H25/22 , F16H25/2204 , F16H25/2214 , F16H25/2233
摘要： A ball screw device including a low-cost retainer that is disposed between a ball screw shaft and a ball nut and has a flange portion, a steering system using the ball screw device, and a method for producing the retainer of the ball screw device are provided. The ball screw device includes the ball screw shaft, the ball nut, rolling balls, and the retainer. Both side surfaces of each of retainer grooves are formed so as to allow radially outward movement of the rolling balls and to restrict radially inward movement thereof, and the retainer has a weld joint at both of the opposite ends of each retainer groove in the axial direction of the retainer.
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公开(公告)号：US20180193978A1
公开(公告)日：2018-07-12
申请号：US15858198
申请日：2017-12-29
申请人： JTEKT CORPORATION
发明人： Akira WATANABE
CPC分类号： B24B41/062 , B24B5/04 , B24B5/045 , B24B19/125 , B24B49/003 , B24B49/10 , B24B49/16
摘要： A grinding apparatus grinds a workpiece by rotating the workpiece held by main spindles and a grinding wheel held by a wheel spindle, and by relatively moving the grinding wheel toward and away from the workpiece. The grinding apparatus includes a first detection unit that detects a rotational phase of the workpiece; a second detection unit that detects a grinding resistance moment at a grinding point between the grinding wheel and the workpiece, or detects a drive current of a rotary drive unit of the workpiece or a rotary drive unit of the grinding wheel; a storage unit that stores the grinding resistance moment or the drive current in a manner associated with the rotational phase; and a determination unit that determines a slip between the workpiece and the main spindles based on the grinding resistance moment or the drive current at a current rotational phase, and on the grinding resistance moment or the drive current at the same phase as the current rotational phase of a previous time.
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