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2. 发明授权

US4171177A Screw thread cutting member 失效
标题翻译：螺纹切割件
公开(公告)号：US4171177A
公开(公告)日：1979-10-16
申请号：US858029
申请日：1977-12-06
申请人： Timothy J. R. Barnsdale
发明人： Timothy J. R. Barnsdale
IPC分类号： B23G5/06
CPC分类号： B23G5/06 , Y10T408/9045 , Y10T408/9046 , Y10T408/90467 , Y10T408/9048
摘要： A male screw thread-formed member such as an insert having a thread cutting action has an exterior peripheral portion of substantially full V-thread form along which two or more angularly spaced apart flutes extend from one or both ends of the member, the member being provided with at least one non-helical rib initially of generally annular peripheral V-form at one or both ends thereof and on which is formed a varying reduced V-thread form which follows a helix corresponding to that of the full thread form whereby pointed cutting formations providing peaks of different radial heights and with some of them of offset disposition relative to the helix are formed on the or each rib at the flutes for effecting a distributed thread cutting action thereat, e.g., for use in thermo-setting plastic material.
摘要翻译：具有螺纹切削作用的插入件的外螺纹形成构件具有基本上完整的V形螺纹形状的外周部分，两个或多个角度间隔开的槽纹从该构件的一端或两端延伸，该构件为设置有至少一个非螺旋肋，其最初具有大致环形的外周V形的一端或两端，并在其上形成一个变化的减小的V形螺纹形式，其遵循对应于全螺纹形式的螺旋形，由此尖切割形成具有不同径向高度的峰，并且在凹槽处的每个肋上形成相对于螺旋线的偏移配置中的一些，以在其上进行分布螺纹切割动作，例如用于热固性塑料材料。

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