钝圆半径对径向中径差影响的数学模型分析

Mathematical Model Analysis of the Influence of Hone Radius on Radial Pitch Diameter Difference

螺纹连接作为飞机中最重要承力构件,对飞机的安全性有重大的影响。所以在制造飞机的常用材料Al7075上制造出高质量的内螺纹就显得十分关键。径向中径差作为评价内螺纹质量的重要参数,对内螺纹的质量影响很大。钝圆半径会影响内螺纹的加工质量,为了研究它对Al7075攻丝加工的径向中径差影响,建立攻丝加工的准静态数学模型来进行仿真,并通过试验进行验证。结果表明:模型能够有效预测径向中径差的变化趋势;径向中径差随钝圆半径的增加呈先减小后增大的趋势,并且在10μm时获得了最小的径向中径差。

As the most important load-bearing component in the aircraft,threaded connection has a significant impact on the safety of the aircraft.Therefore,it is very important to manufacture high-quality internal threads on Al7075,a commonly used material for aircraft manufacturing.As an important parameter for evaluating the quality of internal threads,the radial pitch diameter difference has a great influence on the quality of internal threads.The hone radius affects the processing quality of the internal thread.In order to study the influence of the hone radius on the radial pitch diameter difference of Al7075 tapping,a quasi-static mathematical model of tapping was established for simulation,and it was verified by experiments.The results show that the model can be used to effectively predict the changing trend of the radial pitch diameter difference;the radial pitch diameter difference first decreases and then increases with the increase of the hone radius,and the smallest radial pitch diameter difference is obtained at the bone radius is 10μm.