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    METHOD OF MANUFACTURING RING-ROLLED ELEMENT
    2.
    发明公开
    METHOD OF MANUFACTURING RING-ROLLED ELEMENT 审中-公开

    公开(公告)号：EP4082684A1

    公开(公告)日：2022-11-02

    申请号：EP20908430.0

    申请日：2020-12-16

    申请人： Hitachi Metals, Ltd.

    发明人： MUSHA, Kazuya ,  OHSONE, Jun ,  ISHIWARI, Yuji ,  OJI, Momoko

    IPC分类号： B21B5/00 ,  B21H1/06 ,  B21J5/00

    摘要： Provided is a ring-rolled member manufacturing method enabling stabilization of the attitude of the ring material without generating a defect and the like in the resulting ring-rolled member even when the main roll of the ring-rolling device is provided with the flange portions positioned on upper and lower sides of the ring material. A ring-rolling device used in the ring-rolled member manufacturing method of the present invention is provided with a main roll 10 and a mandrel roll 20. An outer peripheral face of the main roll includes a recessed portion 12 to accommodate the ring material and an outer peripheral face of the mandrel roll 20, an upper flange portion 11 positioned on an upper side thereof, and a lower flange portion 13 positioned on a lower side thereof. An inner face of the recessed portion includes a rolling face 12S to be in contact with an outer peripheral face of the ring material, an upper face on the upper flange portion side, and a lower face 13S on the lower flange portion side, the lower face 13 S having a slope in such a way that an opening of the recessed portion 12 is enlarged. The slope starts from within a range of a distance corresponding to a thickness of the ring-rolled member from a line of intersection between the lower face 13 S and the rolling face 12S. An angle of the slope is greater than 0.3° and no greater than 9° with reference to the perpendicular plane.

    METHOD FOR COOLING RING ROLLING MAIN ROLL AND METHOD FOR MANUFACTURING RING ROLLED BODY
    4.
    发明公开
    METHOD FOR COOLING RING ROLLING MAIN ROLL AND METHOD FOR MANUFACTURING RING ROLLED BODY 审中-公开

    公开(公告)号：EP3590615A1

    公开(公告)日：2020-01-08

    申请号：EP18781229.2

    申请日：2018-03-28

    申请人： Hitachi Metals, Ltd.

    发明人： MURAI, Takuya ,  MATSUI, Takanori ,  KIWAKE, Tomoyoshi

    IPC分类号： B21B27/10 ,  B21B5/00 ,  B21B27/02 ,  B21H1/06

    摘要： In a method of cooling a main roll, strength of a shaft and a peripheral portion thereof of the main roll is sufficiently secured, maintenance of the main roll is facilitated, and the shaft and the peripheral portion thereof of the main roll are efficiently cooled. In a method of manufacturing a ring rolled body, a high-quality ring rolled body is produced. The present invention relates to a method of cooing a main roll 1 for ring rolling in a state in which one side, in the rotation axis direction, of the main roll 1 faces upward, and relates to a method of manufacturing a ring rolled body, including the cooling method. In the cooling method, the shaft 11 is cooled by injecting a liquid W into a receiving part 13, 17 which is recessed from an upper end surface 12c of a die 12 of the main roll 1 facing the one side in the rotation axis direction and surrounds the shaft 11 of the main roll 1. In the method of manufacturing a ring rolled body, a ring rolled body is manufactured by heating the die 12 by an induction heating mechanism 6 and cooling the shaft 11 by the cooling method, and further, reducing a ring material M between the main roll 1 and the mandrel 2.

    METHOD FOR PRODUCING RING-ROLLED PRODUCT
    7.
    发明公开
    METHOD FOR PRODUCING RING-ROLLED PRODUCT 审中-公开

    公开(公告)号：EP3385006A1

    公开(公告)日：2018-10-10

    申请号：EP16870801.4

    申请日：2016-12-01

    申请人： Hitachi Metals, Ltd.

    发明人： MURAI, Takuya ,  MATSUI, Takanori ,  ISHIWARI, Yuji ,  KIWAKE, Tomoyoshi

    IPC分类号： B21B5/00 ,  B21B27/10 ,  B21H1/06

    摘要： The temperature distribution of a ring material in ring rolling can be efficiently controlled within the appropriate temperature range, and as a result, the quality of a ring-rolled product which is manufactured by using the ring rolling, can be efficiently enhanced.
    The present invention relates to a method for manufacturing a ring-rolled product, the method forms the ring-rolled product from a ring material 1 by using a mandrel roll 2 and a main roll 3, the mandrel roll 2 and the main roll 3 are configured so as to contact inner and outer circumferential surfaces 1b and 1c of the ring material 1 respectively, and are configured so as to press the ring material 1 in a radial direction thereof in a state in which the ring material 1 is rotated in a circumferential direction thereof. The manufacturing method includes a step of rolling the ring material 1, the step has an operation of induction-heating the main roll 3 by at least one of induction heating elements 6 and 7 and rolling the ring material 1 between the mandrel roll 2, and the main roll 3 which is induction-heated.

    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

    申请人： HITACHI METALS MMC SUPERALLOY, LTD. ,  Nippon Institute of Technology ,  Hitachi Metals, Ltd.

    发明人： OHSONE, Jun ,  WATANABE, Masayuki ,  TAKIZAWA, Hideo

    IPC分类号： B21K1/32 ,  B21B5/00 ,  B21H1/06 ,  B21J5/02 ,  F01D5/02 ,  F02C7/00 ,  B21K21/06

    CPC分类号： F01D11/006 ,  B21B5/00 ,  B21H1/06 ,  B21J5/02 ,  B21J5/06 ,  B21J13/02 ,  B21K1/32 ,  B21K21/06 ,  B23P15/006 ,  C22C19/03 ,  C22C19/07 ,  F01D5/02 ,  F01D5/06 ,  F01D25/00 ,  F02C7/00 ,  F05D2260/30

    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。