It would be ready for virtual manufacture of ball - end cutters . firstly , the traditional cutting - edge models with constant helix angle of ball - end cutters are analyzed and the befitting normal helix models are proposed , and helical peculiarities of them are analyzed by definition of helix angle 首先,本文对传统的等螺旋角的球头立铣刀刃口曲线的模型进行了分析,建立了正交螺旋线的刃口曲线模型,并运用螺旋角的定义分析了该刃口曲线的特点。
3 . the trapping characteristics of ordinary helical gear pump are lucubrated by theory for the first time , the theoretic relation of the gear rotor between the end overlap coefficient and trapping phenomenon is discussed respectively with clearence or without clearcence , and the relation of trapping volume with the rotational angle turn is also discussed . the selective range of the helical angle that can eliminate completely the trapping of helical gear pump is gained , which never appeared in literature before 首次对普通斜齿齿轮泵的困油特性进行深入的理论研究，分别讨论了有侧隙和无侧隙时普通斜齿齿轮泵转子的端面重合度与困油现象之间的理论关系，以及困油容积随转角的变化关系，得到了完全消除斜齿齿轮泵困油冲击的螺旋角机械科学研究院博士学位论文的选择范围。
For cutting the composite lock gear with unequal tooth thickness , a study is made on the design method of gear sharper cutter with nonstandard parameter involute tooth profile and noninvolute tooth profile . the cutter tooth arrangement , the choice of teeth number of the cutter and the basic method of cutter design are discussed ; and a new method of choosing deflection factor by using limited area is presented . and the curve of relationship between rear angle on tooth crest and helical angle on tooth side of the cutter is given so as to give a basis for the gear sharper cutter to choose its parameters . to design nonstandard gear sharper cutter by adopting the method mentioned above will simplify the calculation and will increase the efficiency of design 研究加工不等齿厚的非标准参数渐开线齿形，与非渐开线齿形复合的锁闭齿轮插齿刀刀齿的排列、刀具齿数的选择以及刀具设计的基本方法，介绍用限制区域选择插齿刀变位系数的新方法，并给出刀具齿顶后角与侧螺旋角的关系曲线，为插齿刀参数的选择提供依据.结果表明，采用上述方法设计非标准复合齿轮插齿刀，可简化计算和提高设计效率
