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    • 1. 发明授权
    • Method for manufacturing a worm shaft
    • 蜗杆轴的制造方法
    • US07231794B2
    • 2007-06-19
    • US11012188
    • 2004-12-16
    • Koji Kidowaki
    • Koji Kidowaki
    • B21D17/04B21H3/12
    • B21H5/005B21H5/027
    • An object of the present invention is to provide a method of manufacturing a rotational shaft having a worm, wherein a worm portion has a small bending amount. According to the method of the invention, a worm portion is formed at a worm forming portion by a rolling process with rolling dies, and a small diameter portion is formed at least at one axial end of the worm forming portion, wherein a diameter of the small diameter portion is smaller than a diameter of a bottom of a worm tooth to be formed at the worm forming portion, so that surplus material portion of the worm forming portion can flow toward the small diameter portion.
    • 本发明的目的是提供一种制造具有蜗杆的旋转轴的方法,其中蜗杆部具有小的弯曲量。 根据本发明的方法,通过轧制过程在蜗杆形成部分形成蜗杆部分,并且在蜗杆形成部分的至少一个轴向端处形成小直径部分,其中直径 小直径部分小于在蜗杆形成部分形成的蜗杆齿的底部的直径,使得蜗杆形成部分的剩余材料部分能够朝向小直径部分流动。
    • 5. 发明授权
    • Method of rolling worm gear and the worm gear
    • 蜗轮蜗杆蜗杆蜗杆传动方法
    • US06915673B2
    • 2005-07-12
    • US10333921
    • 2002-06-20
    • Toshinaka ShinbutsuMinoru YoshizawaShuichi AmanoKenji Ito
    • Toshinaka ShinbutsuMinoru YoshizawaShuichi AmanoKenji Ito
    • B21H5/00F16H55/22B21H3/04
    • B21H5/005F16H55/22Y10T29/49471
    • A worm is formed by rolling to reduce the number of processing steps while ensuring the worm accuracy satisfactorily. A work material is positioned between a first rolling die (100) and a second rolling die (101) by rotation of the rolling dies and a servomotor (76) for feeding the work material. When the lead angle of a worm is large and there is a large difference between the finished diameter and the blank diameter, the lead angle changes during the progress of rolling process, resulting in occurrence of through-feed. A slide plate (55) is freely slidable on a slide (53). Therefore, when through-feed occurs owing to the lead angles of the first and second rolling dies (100) and (101) and the workpiece, the slide plate (55) slides freely, and this is detected with a detecting sensor. The rotation of the first and second rolling dies (100) and (101) is stopped. Then, the first and second rolling dies (100) and (101) initiate reverse rotation, and at the same time, the slide plate (55) also initiates movement in the reverse direction. Thus, rolling is started. Thereafter, similar processing is repeated to perform rolling.
    • 通过滚动形成蜗杆以减少加工步骤的数量,同时确保蠕虫精度令人满意。 工件通过滚动模的转动和用于供给工件的伺服电动机(76)而位于第一轧制模(100)和第二轧模(101)之间。 当蜗杆的导程角较大时,成品直径与坯料直径之间存在较大差异时,导辊角度在轧制过程中发生变化,导致通过进给。 滑板(55)可在滑块(53)上自由滑动。 因此,当由于第一和第二轧制模具(100)和(101)和工件的引导角度而产生贯通进给时,滑板(55)自由滑动,并且用检测传感器检测。 停止第一和第二轧制模具(100)和(101)的旋转。 然后,第一和第二轧制模具(100)和(101)启动反向旋转,同时滑板(55)也开始相反方向的移动。 因此,开始滚动。 此后,重复类似的处理以进行滚动。