Feed speed scheduling method for parts with rapidly varied geometric feature based on drive constraint of NC machine tool
Feed speed scheduling method for parts with rapidly varied geometric feature based on drive constraint of NC machine tool
复制标题
基于数控机床驱动约束的几何特征快速变化零件进给速度调度方法
DOI：
10.1016/j.ijmachtools.2014.07.010
复制
发表时间：
2014-12
影响因子：
14
通讯作者：
Liu, Wei
中科院分区：
文献类型：
--
作者：
Wang, Ling;Ma, Jianwei;Zhao, Kai;Liu, Wei
由于存在快速变化的几何特征，在该类零件的数控加工过程中，由于数控机床的驱动约束，数控机床工作台的实际移动速度不能及时达到数控程序中设定的进给速度。此外，当采用恒定的加工参数加工几何特征快速变化的零件时，机床在驱动约束下会产生剧烈的振动，严重制约了这类零件加工质量和效率的提高。为了高质量、高效率地加工此类零件，提出了一种变加工参数的分区加工方法。首先，研究了加工误差的产生机理，建立了加工误差的数学模型。找出了曲率和数控编程进给速度对加工误差的影响规律。最后，综合考虑驱动约束和加工误差要求，建立了程序进给速度与曲率的关系，得到了不同曲率下的程序进给速度。以等角螺旋微带天线边缘线的数控加工为例，实验结果表明，与加工参数不变的加工结果相比，变加工参数分区加工方法的最大加工误差降低了35.51%，平均加工误差降低了46.65%。再比如，加工出三叶草玫瑰线，加工质量也得到了提高。研究表明，基于曲率变化量的程序进给速度分配方法可以提高加工精度，保证加工效率，为快速变化几何特征零件的加工提供了一种有效的方法。
As the existence of rapidly varied geometric feature and during the NC manufacturing process of this kind of parts, the actual moving speed of the workbench of the NC machine tool cannot reach the feed speed set in the NC program timely due to the drive constraint of NC machine tool. Furthermore, the machine tool would vibrate violently with the drive constraint when employing the constant machining parameter to process the parts with rapidly varied geometric feature, which seriously restricts the improvement of processing this kind of parts with high quality and high efficiency. In order to manufacture such parts with high quality and high efficiency, a sub-regional processing method with variable machining parameters is proposed. Firstly, the generation mechanism of the machining error is studied, and its mathematical model is built. Then the change rule of the machining error influenced by the curvature and the NC programmed feed speed is found out. Finally, taking the drive constraint and the machining error requirement into account, the relationship between the programmed feed speed and the curvature is established, and the corresponding programmed feed speeds to different curvatures are obtained. Taking the NC machining of the edge line of spiral microstrip antenna, which is an equiangular spiral, for example, the experiment results show that compared with the machining result with constant machining parameter, the maximum machining error of the sub-regional processing method with variable machining parameters decreases by 35.51% and the average value of the machining error decreases by 46.65%. For another example, the clover rose line is machined and the processing quality is also improved. This study proves that the method distributing the programmed feed speeds based on the curvature variation can improve the machining precision and ensure processing efficiency, and provides an effective method to manufacture parts with rapidly varied geometric feature.
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影响因子：
5.7
作者：
J. Rabemanantsoa;A. Sharaiha
通讯作者：
J. Rabemanantsoa;A. Sharaiha
DOI：
10.1016/j.ijmachtools.2013.06.005
发表时间：
2013-09
影响因子：
14
作者：
Ming-Tzong Lin;Shih-Kai Wu
通讯作者：
Ming-Tzong Lin;Shih-Kai Wu
DOI：
10.1109/87.799671
发表时间：
1999-11
期刊：
IEEE Trans. Control. Syst. Technol.
影响因子：
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作者：
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通讯作者：
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DOI：
10.3901/cjme.2006.02.265
发表时间：
2006
期刊：
--
影响因子：
--
作者：
Liu;Guran
通讯作者：
Liu;Guran
影响因子：
1.5
作者：
G. Zito;E. Staderini;S. Pisa
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G. Zito;E. Staderini;S. Pisa