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公开(公告)号：US10525522B2
公开(公告)日：2020-01-07
申请号：US16305410
申请日：2018-04-17
申请人： NSK LTD.
发明人： Yuu Yasuda , Mizuki Watanabe , Yuuki Mizushima
摘要： With respect to the manufacture of cylindrical rolling bodies, excess material on an outside section in the radial direction and recesses in both end surfaces in the axial direction are not generated as much as possible in the intermediate material that is removed from a molding device for performing compression molding. Annular concave sections 27 are provided on the inner-circumferential surfaces 20a of molding concave sections 19a provided in a stationary-side mold 17a and a movable-side mold 18a. The stationary-side mold 17a and the movable-side mold 18a are brought close to each other in the axial direction while compressing the intermediate material 23 in a state in which both side sections in the axial direction of the intermediate material 23 are inserted into the molding concave sections 19a. At this time, a part of the material of the intermediate material 23 is made to enter inside the annular concave sections 27, and undercut sections 32 are formed on the outer side in the radial direction of a compression-molded intermediate material 23b. After that, when removing both side sections in the axial direction of the intermediate material 23b from the inside of the molding concave sections 19a in the axial direction, the undercut sections 32 are drawn through or handled by stepped sections 29 existing at the end sections in the axial direction of the annular concave sections 27.
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公开(公告)号：US10471555B2
公开(公告)日：2019-11-12
申请号：US15035270
申请日：2014-11-26
申请人： NSK Ltd.
发明人： Kazuto Kobayashi , Yuu Yasuda
摘要： A method for manufacturing an annular member includes: a cylindrical member forming step of forming a cylindrical member with an annular shape from a round bar material; and a cutting and separating step of cutting and separating the cylindrical member over an axial direction of the cylindrical member while rotating the cylindrical member, the cylindrical member being cut and separated by a shear force obtained by restraining molds, which apply an urging force to an outer circumferential surface of the cylindrical member, and by a restraining mold, which is provided with a gap on the outer circumferential surface of the cylindrical member, among a plurality of restraining molds provided on an inner circumferential surface side and an outer circumferential surface side of the cylindrical member along the axial direction, to obtain a plurality of annular members.
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公开(公告)号：US10369612B2
公开(公告)日：2019-08-06
申请号：US15748901
申请日：2016-12-16
申请人： NSK LTD.
发明人： Kazuto Kobayashi , Hiroshi Koyama , Yuu Yasuda
IPC分类号： B21D28/00 , B21D28/36 , B21D28/28 , B21K1/30 , F16D23/06 , B21D51/16 , F16D23/02 , B21D28/02 , B21D53/16 , B21D53/84
摘要： A method and a system for producing a ring-shaped member. A punching process is carried out on an axial intermediate part of a first intermediate annular material so as to produce a pair of ring-shaped members. A punching step includes a step in which a first punching process is carried out over a first range of the axial intermediate part in the circumferential direction, and a step in which a second punching process is carried out over a second range of the axially-oriented intermediate part, which is at least partially different than the first range, in the circumferential direction. The first punching process is carried out such that at least one tab is formed. The second punching process is carried out such that at least one separate tab is formed, thereby producing the pair of ring-shaped members.
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公开(公告)号：US20160288273A1
公开(公告)日：2016-10-06
申请号：US15035270
申请日：2014-11-26
申请人： NSK Ltd.
发明人： Kazuto Kobayashi , Yuu Yasuda
摘要： A method for manufacturing an annular member includes: a cylindrical member forming step of forming a cylindrical member with an annular shape from a round bar material; and a cutting and separating step of cutting and separating the cylindrical member over an axial direction of the cylindrical member while rotating the cylindrical member, the cylindrical member being cut and separated by a shear force obtained by restraining molds, which apply an urging force to an outer circumferential surface of the cylindrical member, and by a restraining mold, which is provided with a gap on the outer circumferential surface of the cylindrical member, among a plurality of restraining molds provided on an inner circumferential surface side and an outer circumferential surface side of the cylindrical member along the axial direction, to obtain a plurality of annular members.
摘要翻译： 环形构件的制造方法包括：圆筒状构件形成工序，从圆棒材料形成环状的筒状构件; 以及切割和分离步骤，在旋转圆柱形构件的同时，在圆柱形构件的轴向方向上切割和分离圆柱形构件，圆柱形构件通过限制模具获得的剪切力被切割和分离，该剪切力对 在圆筒形构件的外圆周表面和在圆筒构件的外圆周表面上设置有间隙的限制模，在设置在圆筒构件的内周面侧和外周面侧的多个限制模之间 圆柱形构件沿轴向方向，以获得多个环形构件。
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公开(公告)号：US10583475B2
公开(公告)日：2020-03-10
申请号：US15505689
申请日：2015-08-20
申请人： NSK LTD.
发明人： Kazuto Kobayashi , Yuu Yasuda
摘要： Construction is achieved that, together with preventing the occurrence of damage to a mandrel, is able to improve precision of the shape of a ring-shaped member after processing. A mandrel includes a pair of support shaft sections that are provided so as to be separated in the axial direction and so as to be concentric with each other, and a rolling shaft section that is concentrically provided in the axial direction between the pair of support shaft sections. One of the support shaft sections is provided in a state in which displacement in the axial direction with respect to the rolling shaft section is regulated. The other support shaft section is provided in a state in which displacement in a direction going away from the rolling shaft section is possible when a pressing force is applied in that direction.
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公开(公告)号：US10272485B2
公开(公告)日：2019-04-30
申请号：US15115698
申请日：2015-02-12
申请人： NSK Ltd.
发明人： Kazuto Kobayashi , Yuu Yasuda
摘要： There is provided a method for manufacturing ring-shaped members at a good yield and high production efficiency. To achieve this object, the following is performed. A single (a sequence of) forging produces a joined body formed by radially coupling four cylindrical portions with different inner diameter sizes. A cylindrical member that has the largest inner diameter size and a cylindrical member that has the third largest inner diameter size after the forging are employed as ring-shaped members without change. A rolling process is performed on respective cylindrical member that has the smallest inner diameter size and cylindrical member that has the second largest inner diameter size to obtain ring-shaped members. Thus, two sets of ring-shaped members are obtained as two sets of inner rings and outer rings.
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