Milling path planning for helical surface copper electrodes
Milling path planning for helical surface copper electrodes
复制标题
螺旋表面铜电极的铣削路径规划
DOI：
10.1007/s00170-021-06886-x
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Peng Wang
中科院分区：
文献类型：
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作者：
Zhaoyao Shi;Zhipeng Feng;Shoujin Lin;Aijun Tong;Ke Li;Jihua Ren;Peng Wang
铣削加工具有灵活性和通用性的特点，可以大大缩短定制刀具的生产周期。为了在四轴数控机床上用通用刀具铣削均匀粗糙度螺旋面，设计最优的铣削路径，采用解析法建立渐开线齿轮的横廓模型，并利用法向偏置原理建立横廓等距廓线，为刀具路径提供理论刀位。针对基于等角度确定馈线条数时产生的相邻线间距不等的问题，提出了一种基于等弧长的馈线条数确定方法。该方法根据微积分原理，计算渐开线曲线的弧长，以确定使残留高度近似均匀分布在齿面上的合适进给线数。在铣削实验中，验证了LRTSLBL铣削和LRTSTBT铣削的加工效率，并且LRTSLBL铣削避免了小体积刀具磨损下的螺距峰值。通过LRTSTBT铣削跳齿试验，确定了节距峰值产生的原因，为节距误差补偿提供了依据。
Milling has the characteristics of flexibility and versatility, and can largely reduce the production cycle of customized tools. This study aims to mill helical surfaces of uniform roughness with universal tools in four-axis CNC machine tools through designing the optimal milling path. The transverse profile of the involute gear is modeled by the analytical method and the equidistant profile of the transverse profile is established by using the principle of normal offset to provide a theoretical tool position for tool paths. Aiming at the problem of unequal adjacent line spacing generated in the determination of the number of feed lines based on a constant angle, a determination method of the number of feed lines based on a constant arc length is proposed. In this method, according to the principle of calculus, the arc length of the involute curve is calculated to determine the proper number of feed lines which allows the scallop height to be approximately uniformly distributed on the tooth surface. In milling experiments, the processing efficiencies of LRTSLBL milling and LRTSTBT milling were confirmed and the peak of pitch under a small volume of tool wear was avoided by LRTSLBL milling. Importantly, the skip tooth machining test by LRTSTBT milling confirmed the cause for pitch peak and provided the basis for pitch error compensation.