| Issue |
MATEC Web Conf.
Volume 358, 2022
3rd International Symposium on Mechanics, Structures and Materials Science (MSMS 2022)
|
|
|---|---|---|
| Article Number | 01034 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.1051/matecconf/202235801034 | |
| Published online | 19 May 2022 | |
Nonlinear error control of five-axis machining singular region
1 School of Mechanical Engineering, TianGong University, Tianjin, China
2 College of Mechanical and Control Engineering, GuiLin University of Technology, Guilin, China
* Corresponding author: liuzhi2595@163.com
Aiming at the singular problem of large nonlinear error caused by the extreme change of rotation in five axis NC machining of complex surface. An optimization algorithm of tool path in singular region is proposed. Taking a-c double turntable five axis linkage NC machine tool as an example, firstly, the mathematical models of tool local milling ability, machining bandwidth and tool axis inclination are established. Based on the two constraint models, the mechanism of singularity and the size of singular region are analyzed, and it is proposed to adjust the side angle with the tool contact as the rotation center to avoid the singular region. The modified tool axis vector that does not meet the accuracy is interpolated recursively according to the interpolation principle. This method solves the problem of large nonlinear error caused by the extreme rotation of the rotating axis in the singular region on the basis of meeting the requirement of no curvature interference. At the same time, the processing bandwidth before and after modification is guaranteed to remain unchanged. Simulation results show that the algorithm can effectively detect the singular region and improve the machining quality in the singular region.
© The Authors, published by EDP Sciences, 2022
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