Self-tapping threaded bushings
    1.
    发明授权
    Self-tapping threaded bushings 失效
    自攻螺纹

    公开(公告)号:US3866510A

    公开(公告)日:1975-02-18

    申请号:US32995273

    申请日:1973-02-05

    摘要: The disclosure relates to a threaded bushing which, upon entering and turning in the initially smooth bore of the work piece, will form through its own male thread the corresponding internal thread within the wall of the work piece bore. The bushing is formed with one or more exterior bevels or grooves which extend axially over at least several threads and intersect such threads to form spoon or cup-shaped frontal areas where each bevel or groove merges into a respective thread.

    摘要翻译: 本公开涉及一种螺纹衬套,其在进入和转动工件的初始平滑孔时,将通过其自身的外螺纹形成在工件孔的壁内的相应的内螺纹。 衬套形成有一个或多个外部斜面或凹槽,其在至少几个螺纹上轴向延伸并且与这些螺纹相交,以形成勺子或杯形正面区域,其中每个斜面或凹槽合并到相应的螺纹中。