METHOD FOR MANUFACTURING RING MEMBER FOR BEARING, AND MOLD FOR INVERSION WORKING

    公开(公告)号:EP4420807A1

    公开(公告)日:2024-08-28

    申请号:EP22898485.2

    申请日:2022-11-16

    申请人: NSK Ltd.

    摘要: A method for manufacturing a bearing ring member includes an inversion step of deforming a workpiece having an annular shape by sandwiching the workpiece between a punch disposed on a first side in a predetermined direction and a die disposed on a second side. The punch has a first R surface formed in a circular arc shape. The die has a second R surface formed in a circular arc shape, and a tapered surface inclined with respect to the predetermined direction. The inversion step includes a first step of deforming the workpiece using the punch and the die in a state where the first R surface and the second R surface are in contact with the workpiece, and a second step of deforming the workpiece using the punch and the die in a state where the first R surface and the tapered surface are in contact with the workpiece.

    MANUFACTURING METHOD FOR RING FORMED BODY
    5.
    发明公开

    公开(公告)号:EP3189910A4

    公开(公告)日:2018-04-25

    申请号:EP15838736

    申请日:2015-08-27

    摘要: A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, is provided. In the present invention, a material is processed by first forging so as to be shaped in a shape including a bottom which is formed in a substantially disk shape, and a peripheral wall which is inclined to a direction from a center of the bottom toward an outer periphery thereof, in a direction from the outer periphery of the bottom toward one side in a direction of a center axis of the bottom, the bottom of a first forged article obtained by the first forging is drilled, a drilled article obtained by the drilling is ring-rolled, a ring material obtained by the ring rolling is placed inside two molds, the ring material is then processed by second forging so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced.

    PUNCH FOR COLD BACKWARD EXTRUSION FORGING
    8.
    发明公开
    PUNCH FOR COLD BACKWARD EXTRUSION FORGING 审中-公开
    STEMPELFÜRRÜCKWÄRTIGESKALTEXTRUSIONSSCHMIEDEN

    公开(公告)号:EP2656942A4

    公开(公告)日:2017-07-26

    申请号:EP11851026

    申请日:2011-12-19

    申请人: SHOWA DENKO KK

    发明人: NATSUI MASAYUKI

    IPC分类号: B21J13/02 B21J5/06 B21K21/14

    摘要: A punch 1 includes a forming land portion 2 formed in parallel with a punch axis 7, a forming R-portion 3 having an arc-shaped cross-section and formed continuously with the forming land portion 2 on a tip end side with respect to the forming land portion 2, and a recess portion 5 formed on a base end side with respect to the forming land portion 2 and having a diameter smaller than a diameter of the forming land portion 2. A Rockwell hardness HRF of the blank 20 is within a range of 65 to 105. The curvature radius R of the forming R-portion 3 of the punch 1 is set to be larger than the thickness L of a cylindrical peripheral wall portion 21 of the forged product 25. The length B of the forming land portion 2 of the punch 1 is set within a range of 0.05 to 0.15 mm. The recess width C of the recess portion 5 with respect to the forming land portion 2 of the punch 1 is set within a range of 0.15 to 1.0 mm.

    摘要翻译: 冲头1包括:与冲头轴线7平行地形成的成形着地部2;与成形着地部2相比,在前端侧连续地形成有截面呈圆弧状的成形R部3 形成台肩部2和相对于成形台肩部2形成在基端侧并且直径小于成形台肩部2的直径的凹部5.洛氏硬度HRF是在 范围为65至105.冲头1的成形R部分3的曲率半径R被设定为大于锻造产品25的圆柱形周壁部分21的厚度L.成形区域的长度B 冲头1的部分2设定在0.05至0.15mm的范围内。 凹部5相对于冲头1的成型凸台部2的凹部宽度C设定在0.15〜1.0mm的范围内。

    RING MATERIAL AND METHOD FOR MANUFACTURING MOLDED RING
    9.
    发明公开
    RING MATERIAL AND METHOD FOR MANUFACTURING MOLDED RING 审中-公开
    环材料和制造模制环的方法

    公开(公告)号:EP3189911A1

    公开(公告)日:2017-07-12

    申请号:EP15838920.5

    申请日:2015-08-27

    摘要: A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, and a ring material used for producing the ring molded article, are provided. The present invention relates to the method for manufacturing a ring molded article having two convex portions which respectively protrude on both sides of the ring molded article in a direction of a center axis thereof and extend in a direction of a circumeference of the ring molded article. In the manufacturing method, the ring material is placed inside two molds on which concave portions respectively corresponding to the convex portions are formed, in a condition in which the ring material is supported by a region on an outer peripheral side from an outer peripheral side corner in the concave portion of one of the two molds and a region on an inner peripheral side from an inner peripheral side corner in the concave portion of another of the two molds, the ring material is then forged so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced. In addition, the present invention relates to the ring material used for producing the ring molded article.

    摘要翻译: 本发明提供一种能够可靠且高效地制造减少了死区金属的环成型品的环成型品的制造方法及用于制造该环成型品的环材。 本发明涉及具有两个凸出部分的环形模制品的制造方法,该两个凸出部分在环形模制品的两侧沿其中心轴线的方向分别突出并且沿着环形模制品的环绕方向延伸。 在该制造方法中,在将环形材料支承于外周侧的外周侧的区域的状态下,将环形材料配置在形成有与凸部对应的凹部的两个模具的内部 在两个模具中的一个模具的凹部中以及在两个模具中的另一个的凹部中的内周侧角部的内周侧上的区域中,然后锻造环材料以便被两个模具 在环材料的中心轴线的方向上,由此制造环形模制品。 另外,本发明涉及用于制造环状模制品的环材料。