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    • 51. 发明授权
    • Boring device
    • 镗孔装置
    • US4770569A
    • 1988-09-13
    • US82339
    • 1987-08-06
    • Yasumasa OokiOsamu AsanoToshio Mikiya
    • Yasumasa OokiOsamu AsanoToshio Mikiya
    • B23B47/34
    • B23B47/34Y10T408/23Y10T74/18024
    • A boring device has a spindle moving mechanism which retards a tool spindle when the spindle rotates through a predetermined angle. The mechanism has coaxial first and second thrust rings. Thrust balls are disposed between the thrust rings in rolling contact therewith. A retaining element holds the thrust balls such that they keep constant circumferential spaces therebetween. The first thrust ring is fixed to the tool spindle and has recesses in the surface facing the second thrust ring. The second thrust ring is fixed to the casing of the boring device. As the first thrust ring is rotated by the tool spindle, the thrust balls are fitted in the respective recesses, whereby the tool retards by the amount equal to the depth of the recesses. Then, cutting edges of a cutter is separated from the face of a workpiece which is being cut, and a continuous chip is broken into pieces having a predetermined length and is removed from a hole being formed.
    • 镗孔装置具有主轴移动机构,当主轴旋转预定角度时,主轴移动机构延迟工具主轴。 该机构具有同轴的第一和第二推力环。 推力球设置在与其滚动接触的推力环之间。 保持元件保持推力球,使得它们之间保持恒定的周向空间。 第一推力环固定在工具主轴上并且在面向第二推力环的表面中具有凹槽。 第二止推环固定在钻孔装置的外壳上。 当第一推力环由工具主轴旋转时,推力球装配在相应的凹部中,由此工具延迟等于凹槽深度的量。 然后,切割器的切割刃与被切割的工件的表面分离,并且将连续的切屑分解成具有预定长度的片,并从形成的孔中移除。