焊件移动或变位机构，如焊接滚轮架，头尾架翻转机，回转平台和变位机等，精密型的移动变位机构应配伺服电动机驱动。
3 mobile or welding positioner, such as welding roller frame, frame head and tail flip machine, rotary platform and positioner, mobile precision displacement mechanism should drive with servo motor.
求解变位系数和最小齿数的方法可适用于所有节距的齿形链机构。
The approach presented to achieve the modification coefficient and the minimum tooth number is applicable to the silent chain mechanism with all kinds of pitches.
研究双轴滑移齿轮机构变位系数的选择理论，是合理设计这种机构的关键问题。
Study of the theory of choosing modification coefficient of double shaft move wheel gear is the key to the rational design of this mechanism.
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