METHOD AND APPARATUS FOR FORGING GEARS
    5.
    发明公开

    公开(公告)号:EP3450045A1

    公开(公告)日:2019-03-06

    申请号:EP18185340.9

    申请日:2018-07-24

    IPC分类号: B21K1/30 B21J5/12 B23P15/14

    摘要: A method for forging a gear according to the present disclosure includes pushing a material into a molding space of a teeth profile die from one side of the teeth profile die for molding external teeth by a punch, and after the pushing, discharging a gear having the external teeth formed thereon from another side of the teeth profile die by the punch. The method further includes providing a material outer diameter constraint die for constraining an outer diameter of a previous material before the material is pushed into the molding space of the teeth profile die on the one side of the teeth profile die, and setting an inner diameter size of the material outer diameter constraint die to be smaller than a large diameter size of the gear set in the teeth profile die.

    RACK SHAFT AND METHOD FOR PRODUCING SAME
    8.
    发明公开

    公开(公告)号:EP3315225A4

    公开(公告)日:2018-07-11

    申请号:EP16841713

    申请日:2016-08-26

    申请人: NSK LTD

    发明人: MIZUTANI HIROTO

    摘要: After rack teeth (10a) are formed by a forging process, and heat treatment such as quenching treatment and tempering treatment is performed on the rack teeth (10a), a finishing processing is performed only on a center side non-variable gear portion (17) provided on an axial center portion in which a specific stroke is constant to provide a finishing processed portion which is shown with an oblique lattice pattern portion. Accordingly, a manufacturing method of a rack shaft is realized which can ensure necessary and sufficient precision of rack teeth at low cost.

    VERFAHREN UND VORRICHTUNG ZUM FEINBEARBEITEN VERZAHNTER UND GEHÄRTETER WERKRÄDER
    10.
    发明公开
    VERFAHREN UND VORRICHTUNG ZUM FEINBEARBEITEN VERZAHNTER UND GEHÄRTETER WERKRÄDER 审中-公开
    用于精确加工被磨损和硬化工作轮的方法和装置

    公开(公告)号:EP3274120A1

    公开(公告)日:2018-01-31

    申请号:EP16710406.6

    申请日:2016-03-03

    发明人: PROCK, Erich

    摘要: The invention relates to a method for machining toothed and hardened work wheels (1), comprising the following steps: mounting a work wheel (1) that is hardened and pre-toothed with an allowance onto a work piece spindle (4); removing at least 50% of the allowance by means of gear skiving with a skiving wheel (5) that is rotatably driven by a tool spindle (7); precision-machining the work wheel (1) in unchanged tension by means of a honing wheel (6). The forward movement (Vs) occurs during gear skiving in the extension direction of the toothing (2). The delivery (V
    H ) of the work piece (1) that is moved in an oscillating manner in the extension direction of the toothing (2) occurs during honing in the radial direction. The skiving wheel (5) and the honing wheel (6) are driven by a common tool spindle (7). The invention also relates to a device for carrying out the method.