Multi-axis coupling of machining centers based on electromechanical modeling

ZHAO Tong; XIE Yi; HU Jian

doi:10.16511/j.cnki.qhdxxb.2017.22.001

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (2) : 113-119. DOI: 10.16511/j.cnki.qhdxxb.2017.22.001

MECHANICAL ENGINEERING

Multi-axis coupling of machining centers based on electromechanical modeling

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Abstract

The dynamic accuracy of a machining center is strongly influenced by its structural dynamics and control loops. The frequency response of the entire machine including the multi-directional dynamics is important in the machine tool design phase. The structural dynamics of a twin ball screw feed machine are analyzed using a finite element analysis (FEA) and measurements with a focus on the multi-axis coupling of its mechanical system. Then, an electromechanical modeling method is developed where the structural dynamics are replaced by transfer functions to study the multi-axis coupling of the electromechanical system of a horizontal machining center. The results show that when there are modal shapes leading to displacements of the tool or the workpiece in multiple directions, the multi-axis coupling of the machining center must be considered in studies of the dynamics and control parameters.

Key words

machining center / multi-axis coupling / finite element modeling / electromechanical modeling

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ZHAO Tong, XIE Yi, HU Jian. Multi-axis coupling of machining centers based on electromechanical modeling[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(2): 113-119 https://doi.org/10.16511/j.cnki.qhdxxb.2017.22.001

References

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