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1. 发明授权

US07144208B2 Low torque tap 有权
标题翻译：低扭矩丝锥
公开(公告)号：US07144208B2
公开(公告)日：2006-12-05
申请号：US10862870
申请日：2004-06-07
申请人： Willard E. Henderer , Alan L. Barrows , Steven R. Burns , Dennis J. Greene
发明人： Willard E. Henderer , Alan L. Barrows , Steven R. Burns , Dennis J. Greene
IPC分类号： B23B5/06
CPC分类号： B23G5/06 , B23G2200/26 , B23G2225/12 , B23G2225/32 , B23G2225/36 , B23G2225/44 , B23G2225/52 , B23P15/52 , Y10T408/78 , Y10T408/9048
摘要： A low torque tap includes a shank portion with a driving square and a thread cutting portion. The thread cutting portion includes a threaded body with one or more asymmetrical straight flutes that run essentially parallel to a longitudinal axis of the tap. The thread cutting portion also includes one or more short angular flutes or spiral points and a tapered chamfer. For tapping steel alloys, the cutting edges of the straight flutes and the spiral points have a rake or chordal hook angle of between about 5 and 15 degrees. For tapping ferrous materials, the tap is made from molybdenum-enriched high-speed steel and may be coated with a wear-resistant, friction-reducing layer. A second, outer layer, such as molybdenum disulfide, may be applied over the wear-reducing layer for further reduction in friction. For tapping non-ferrous materials, the tap may be coated with a layer of material containing carbon.
摘要翻译：低扭矩分接头包括具有驱动方形和螺纹切削部分的柄部分。螺纹切割部分包括具有一个或多个基本上平行于龙头的纵向轴线延伸的不对称直槽的螺纹体。螺纹切削部分还包括一个或多个短角度凹槽或螺旋点和锥形倒角。对于钢铁合金，直槽和螺旋点的切削刃具有约5至15度之间的耙齿或弦杆钩角。对于黑色金属材料，龙头由富钼高速钢制成，可以涂覆耐磨，减摩层。可以在磨损减少层上施加第二外层，例如二硫化钼，以进一步减少摩擦。对于攻丝有色金属材料，龙头可以涂覆一层含碳材料。

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