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1.北京工业大学 信息学部,北京 100124
2.航空工业北京航空精密机械研究所, 北京 100076
[ "何 坚(1969-),男,新疆阿拉尔人,2000年获得西安西北大学硕士学位,2005年获得西安交通大学博士学位.现为北京工业大学软件学院副教授,主要研究方向为智能人机交互、普适计算和物联网。E-mail:jianhee@ bjut.edu.cn" ]
[ "郭泽龙(1996-),男,山西晋城人,硕士研究生,主要从事机电控制、超精密加工技术的研究。E-mail:gzldemok@163.com" ]
收稿日期:2021-02-07,
修回日期:2021-02-26,
纸质出版日期:2021-08-15
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何坚,郭泽龙,罗松保等.基于PMAC时基控制的离轴抛物面超精密加工技术[J].光学精密工程,2021,29(08):1891-1898.
HE Jian,GUO Ze-long,LUO Song-bao,et al.Ultra-precision machining technology of off-axis paraboloid surface based on PMAC time-based control[J].Optics and Precision Engineering,2021,29(08):1891-1898.
何坚,郭泽龙,罗松保等.基于PMAC时基控制的离轴抛物面超精密加工技术[J].光学精密工程,2021,29(08):1891-1898. DOI: 10.37188/OPE.20212908.1891.
HE Jian,GUO Ze-long,LUO Song-bao,et al.Ultra-precision machining technology of off-axis paraboloid surface based on PMAC time-based control[J].Optics and Precision Engineering,2021,29(08):1891-1898. DOI: 10.37188/OPE.20212908.1891.
为了实现对离轴抛物面等非回转对称、不规则复杂曲面零件的金刚石超精密车削成型。本文提出了一种基于PMAC时基控制的离轴抛物面加工方法。论文首先依据平移旋转方程对工件的坐标进行转换,然后根据时基控制原理计算控制参数,最后通过分析刀具的运动过程进行了工艺试验。实验结果表明,在主轴转速96 r·min
-
1
时,切削深度0.005 mm,刀具进给率1 mm·min
-
1
等切削参数进行加工时,成功地获得面形精度2 µm,粗糙度
R
a
为0.02的离轴抛物面。该方法不仅适用于离轴抛物面的加工,还适用于其它回转对称、不规则的自由曲面的超精密加工。
In order to achieve ultra-precision diamond turning of non-rotationally symmetrical, irregular, and complex surfaces such as off-axis paraboloid surfaces, this paper proposes a method for the machining of off-axis paraboloid surfaces using time-based control of a PMAC. This study converts the coordinates of a workpiece based on the translation and rotation equations and then calculates the control parameters based on the time-based control principle. Finally, machining experiments are performed by analyzing the tool motion process. The experimental results show that off-axis paraboloid surfaces with a form error of 2 µm and roughness of
R
a
0.02 are successfully machined at a spindle speed of 100 r/min, cutting depth 0.005 mm, and feedrate of 1 mm/min. This method applies to not only the machining of off-axis paraboloid surfaces but also the ultra-precision machining of other rotationally symmetrical and irregular free-form surfaces.
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