A Geometric Accuracy Error Analysis Method for Turn-Milling Combined NC Machine Tool

被引:7
|
作者
Li, Pengzhong [1 ]
Zhao, Ruihan [2 ]
Luo, Liang [2 ]
机构
[1] Tongji Univ, Sch Mech Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Sino German Sch Postgrad Studies, Shanghai 200092, Peoples R China
来源
SYMMETRY-BASEL | 2020年 / 12卷 / 10期
关键词
Turn-Milling combined NC machine tool; multibody system theory; geometric error modeling; interval sensitivity analysis; ENHANCEMENT; IDENTIFICATION; COMPENSATION; PRODUCT;
D O I
10.3390/sym12101622
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Turn-Milling Combined NC machine tool is different from traditional machine tools in structure and process realization. As an important means in the design stage, the analysis method of geometric accuracy error is also different from the traditional method. The actual errors and the error compensation values are a pair of "symmetry" data sets which are connected by the movement of machine tools. The authors try to make them more consistent through this work. The geometric error terms were firstly determined by topological structure analysis, then based on homogeneous coordinate transformation and multibody system theory, the geometric error model was established. With the interval theory, the function rule of sensitivity of geometric error sources to spatial errors was analyzed in detail, and the global maximum interval sensitivity of nine geometric error sources was extracted, providing a theoretical basis for error compensation and precision distribution. The geometric error sensitivity analysis method proposed in this paper can accurately evaluate the influence weights of each error term on the machining accuracy, and identify the important sensitive error terms with great influence on the machining accuracy from many error terms.
引用
收藏
页码:1 / 17
页数:17
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