Research on control optimization for bonnet polishing system
Research on control optimization for bonnet polishing system
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DOI：
10.1007/s12541-014-0361-6
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发表时间：
2014-03
影响因子：
1.9
通讯作者：
Pan Ri;Zhenzhong Wang;Chun-Jin Wang;Yinhui Xie;D. Zhang;Yin-biao Guo
中科院分区：
文献类型：
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作者：
Pan Ri;Zhenzhong Wang;Chun-Jin Wang;Yinhui Xie;D. Zhang;Yin-biao Guo
非球面光学透镜的抛光通常采用五轴帽式抛光系统进行。为了实现非球面透镜的四轴联动数控加工，提出了一种控制旋进角误差的控制算法。首先，在分析气囊刀具结构和非球面光学加工工艺的基础上，确定了气囊刀具旋转轴与负垂直方向夹角和旋进角等加工过程中重要参数的取值范围，使旋进角误差尽可能小;其次，介绍了控制算法，旨在通过加工点的微位移来减小抛光过程中存在的进动角误差。通过非轴对称非球面抛光仿真实验验证了该控制算法的有效性，结果表明，该控制算法可以将最大旋进角误差减小到0.01°左右，满足真实的加工要求。
Aspheric optical lenses are conventionally polished with continuous precession by 5-axis bonnet polishing system. In this work, in order to achieve that aspheric lenses be processed by four-axis simultaneous NC (numerical control) machining system, one kind of control algorithm was proposed by controlling the error of precession angle. Firstly, on the basis of the analysis of the structure of bonnet tool and processing technology of aspheric optics, ranges of important parameters in machining process such as the angle between spin axis of bonnet tool and negative vertical direction and the precession angle were fixed, to make the minimum errors of precession angle as small as possible; Secondly, the control algorithm was introduced, aimed to reduce the existing errors of precession angle in polishing process by making micro migration of machining points. Then, simulation experiments of polishing nonaxisymmetric aspheric lenses were carried out to validate the suggested control algorithm, the results revealed that the maximum error of precession angle was decreased to about 0.01°, which is available in real processing.