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    • 94. 发明授权
    • Cutting tap and method of making same
    • 切割龙头及其制作方法
    • US08210779B2
    • 2012-07-03
    • US12250570
    • 2008-10-14
    • Willard E. HendererStephen M. GeorgeVladimir D. Volokh
    • Willard E. HendererStephen M. GeorgeVladimir D. Volokh
    • B23G5/06
    • B23G5/06B23G2200/30B23P15/52B24B3/18B24B19/04Y10T408/904Y10T408/9046Y10T408/9048
    • A cutting tap includes a body having an axial forward end and an axial rearward end and a central longitudinal axis. The body has a fluted section at the axial forward end. The fluted section includes a chamfered fluted section extending from the axial forward end of the body and terminating at a first full cutting thread. The chamfered fluted section includes a first cutting thread located a first distance from the axial forward end of the body, and a second cutting thread located a second distance from the axial forward end of the body. The second distance is greater than the first distance. The chamfered fluted section is shaped such that a thickness of a section of material removed by the second cutting thread is smaller than a thickness of a section of material removed by the first cutting thread. A method of making the cutting tap is also disclosed.
    • 切割龙头包括具有轴向前端和轴向后端以及中心纵向轴线的主体。 主体在轴向前端有一个槽纹部分。 槽纹部分包括从主体的轴向前端延伸并且终止于第一全切割螺纹的倒角的槽纹部分。 倒角的槽纹部分包括位于距离主体的轴向前端的第一距离的第一切割螺纹和位于距离主体的轴向前端的第二距离的第二切割螺纹。 第二距离大于第一距离。 倒角的槽纹部分的形状使得由第二切割螺纹去除的部分材料的厚度小于由第一切割螺纹去除的部分的厚度。 还公开了一种制造切割龙头的方法。