reference pitch

When changing and processing spiral shell's bevel gear, it is necessary to use evolute internal spline tooth shape locating taper spindle for backing processing, so as to meet different spindle precision requirements of evolute internal spline reference circle, bearing fit circle and gear pitch circle.

螺伞齿轮更换加工过程中，需使用渐开线内花键齿形定位锥度芯轴支承加工，才能达到渐开线内花键分度圆与轴承配合圆及齿轮节圆同轴精度要求。

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In the process of exploitation, we use a new idea of "pitch cone radius not modification, reference cone angle modification." and order function of "Program" of Pro/ E system to reach parametrical control of assembles of die.

在开发过程中，利用节锥不变、分锥变位的新思路和Pro/E系统中的Program命令功能达到模具组件的参数化控制。

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This paper makes reference to much relevant information and analyzes different technique of machining, and finally adopts roll-pressing to process spirally grooved tube. Main parameters of spirally grooved tube have diameter of tube, wall thickness, corrugation depth and fin pitch.

本论文参考了大量的有关资料，分析了不同加工工艺特点，最后采用了滚压成型的生产工艺来加工螺旋槽管，其主要结构参数有管材外径d、壁厚t、槽深e、螺距p。

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In addition, the transverse angular rate can be decomposed into the yaw angular rate and pitch angular rate with the geographic coordinates of reference.

此外，配合地理坐标基准，可以将横向角速度分解为偏航角速度和俯仰角速度。

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