BEARING WITH IMPROVED RESISTANCE TO MICROPITTING
    32.
    发明公开
    BEARING WITH IMPROVED RESISTANCE TO MICROPITTING 有权
    耐磨性能得到提高

    公开(公告)号:EP2954219A1

    公开(公告)日:2015-12-16

    申请号:EP13703782.6

    申请日:2013-02-06

    申请人: Aktiebolaget SKF

    IPC分类号: F16C19/00

    摘要: A bearing comprising a plurality of rolling elements arranged between an inner raceway (12) and an outer raceway (22) of the bearing, whereby a rolling contact interface is defined between a first rolling contact surface (31) on at least one rolling element and a second rolling contact surface formed by one of the inner and outer raceways (12, 22). The first rolling contact surface has a first RMS roughness R
    q1 and has a first roughness pattern y
    i , expressed in terms of the Peklenik number y. The second rolling contact surface has a second RMS roughness R
    q2 and has a second roughness pattern y
    2 . To minimise micropitting in the bearing, the rolling contact interface has a surface topography in which: - the roughness pattern of the first and of the second rolling contact surfaces are oriented in the direction of rolling, whereby γ 1 ≥ 3.0 and Y
    2 ≥ 10.0; and - the first and of the second rolling contact surfaces have substantially equal roughness heights, whereby 0.8 q1 /R
    q2 ≤ 1.25

    摘要翻译: 一种轴承,包括布置在轴承的内滚道(12)和外滚道(22)之间的多个滚动元件,其中滚动接触界面限定在至少一个滚动元件上的第一滚动接触表面(31)与 由内和外滚道(12,22)中的一个形成的第二滚动接触表面。 第一滚动接触表面具有第一RMS粗糙度R q1并具有以Peklenik数y表示的第一粗糙度模式y i。 第二滚动接触表面具有第二RMS粗糙度R q2并且具有第二粗糙度图案y 2。为了最小化轴承中的微点蚀,滚动接触界面具有表面形貌,其中: - 第一和第二 滚动接触表面沿轧制方向取向,其中γ1≥3.0且Y 2≥10.0; 以及 - 第一滚动接触表面和第二滚动接触表面具有基本相等的粗糙度高度,由此0.8

    SURFACE TREATMENT APPARATUS AND METHOD
    38.
    发明公开
    SURFACE TREATMENT APPARATUS AND METHOD 审中-公开
    表面处理装置及方法

    公开(公告)号:EP2018235A2

    公开(公告)日:2009-01-28

    申请号:EP07867046.0

    申请日:2007-04-02

    发明人: PREVEY, Paul S.

    IPC分类号: B21D17/04

    摘要: The present invention relates to a surface treatment apparatus and method for inducing compressive residual stress in the surface of a workpiece with dimensional variations. The method comprises the acts of measuring the dimensions of the workpiece during a surface treatment operation and adjusting the surface treatment process parameters to account for the measured dimensions. In one embodiment, the apparatus comprises two surface treatment elements oriented in opposition to one another in a caliper configuration. The surface treatment elements are positioned and impinged against the surface of a workpiece by an actuator controlled by a computer control unit. The depth to which the surface treatment elements are impinged is precisely controlled to achieve the desired magnitude and depth of compressive residual stress. A sensor operatively connected to the apparatus senses and relays the dimensions of the workpiece to a computer control unit that adjusts the operating parameters accordingly.