利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

261 records (took 0.015 seconds)

    SPINNING DEVICE AND SPINNING METHOD
    6.
    发明公开
    SPINNING DEVICE AND SPINNING METHOD 审中-公开

    公开(公告)号：EP4176988A1

    公开(公告)日：2023-05-10

    申请号：EP21836986.6

    申请日：2021-02-15

    Applicant: Nihon Spindle Manufacturing Co., Ltd.

    Inventor： TAKADA, Yoshiaki

    IPC: B21D22/16 ,  B21H1/18

    Abstract: Provided are a spinning device and a spinning method capable of easily forming a flange portion while maintaining the wall thickness of a base material when the flange portion is formed in a base material having a tubular shape. A spinning device 1 includes a flange forming section (second forming section 7) that, in a state where a base material having at least a large-diameter portion 91 and a small-diameter portion 92 is relatively rotated, forms a flange portion 93 protruding in a direction away from a center axis O9 on the large-diameter portion 91 by pressing and deforming the large-diameter portion 91 in a direction of a center axis O9 while contacting an outer peripheral portion of the small-diameter portion 92.

    METHOD OF PRODUCING A WHEEL FOR STRADDLED VEHICLES
    7.
    发明公开
    METHOD OF PRODUCING A WHEEL FOR STRADDLED VEHICLES 审中-公开

    公开(公告)号：EP3932580A1

    公开(公告)日：2022-01-05

    申请号：EP21181766.3

    申请日：2021-06-25

    Applicant: Yamaha Hatsudoki Kabushiki Kaisha

    Inventor： SUENAGA, Kentaro ,  KURIMOTO, Yukihiro ,  SUZUKI, Yasunobu ,  MATSUBARA, Keisuke ,  KASHIMA, Hitoshi ,  FUKUJI, Hidehiro ,  NAGAYAMA, Jun ,  OSHIMA, Kahori

    IPC: B21D22/16 ,  B21D53/30 ,  B22D21/00 ,  B23P15/00

    Abstract: A method of producing a wheel for straddled vehicles (100) according to an embodiment of the present invention includes: step (A) of forming an intermediate product (110') including a precursory hub (110'), a precursory rim (120'), and plurality of precursory spokes (130') by using a gravity casting technique; step (B) of performing a flow forming process for the precursory rim of the intermediate product in which, while the intermediate product is rotated, at least a portion of the precursory rim is drawn in a first direction (D1) and a second direction (D2), the first direction (D1) being one direction that extends from a center on an axial direction, and the second direction (D2) being an opposite direction that extends from the center of the intermediate product on the axial direction; and step (C) of, after step (B), performing a cutting process for the intermediate product to at least complete the rim (120). A ratio of a wall thickness (t1) of the precursory rim after step (B) and before step (C) to a wall thickness (t2) of the rim after step (C) is not less than 132% and not more than 433%.

Patent Agency Ranking