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1. CN111906596 - Machining method without intermediate frequency error under magneto-rheological polishing magic angle-step pitch

Office
China
Application Number 202010645628.2
Application Date 07.07.2020
Publication Number 111906596
Publication Date 10.11.2020
Grant Number 111906596
Grant Date 08.10.2021
Publication Kind B
IPC
B24B 1/00
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
1Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
CPC
B24B 1/005
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
1Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
005using a magnetic polishing agent
B24B 51/00
BPERFORMING OPERATIONS; TRANSPORTING
24GRINDING; POLISHING
BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
51Arrangements for automatic control of a series of individual steps in grinding a workpiece
Applicants SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCES
中国科学院上海光学精密机械研究所
Inventors WEI CHAOYANG
魏朝阳
WAN SONGLIN
万嵩林
SHAO JIANDA
邵建达
GU HAOJIN
顾昊金
Agents 上海恒慧知识产权代理事务所(特殊普通合伙) 31317
Title
(EN) Machining method without intermediate frequency error under magneto-rheological polishing magic angle-step pitch
(ZH) 磁流变抛光魔法角度-步距下无中频误差的加工方法
Abstract
(EN) Provided is a machining method without intermediate frequency errors under magneto-rheological polishing magic angle step pitch. The method includes the steps that firstly, a magneto-rheological removal function is obtained through measurement, and meanwhile the control precision of a machine tool is determined; two-dimensional Fourier transform is performed on the removal function, compensation filtering is performed on a frequency spectrum based on the control precision of the machine tool, and a corresponding step pitch of the lowest amplitude point of the filtered two-dimensional frequencyspectrum in the magic angle direction is analyzed; a grid path under a given step pitch is planned on the basis that the included angle between a polishing wheel and the path is a magic angle by adjusting the direction of the processing path or the posture of the magneto-rheological polishing wheel; and the machine tool is finally controlled to perform machining. According to the method, no additional cost is needed, only the included angle between the removal function and the path and the path step pitch need to be changed to the optimal value obtained through theoretical analysis, and the track-shaped intermediate frequency error amplitude can be far lower than other machining noise theoretically and disappear. According to the method, medium-frequency-free machining can be achieved, and low-frequency and high-frequency errors of an element are not affected at all.
(ZH) 一种磁流变抛光魔法角度‑步距下无中频误差的加工方法,步骤为:首先测量得到磁流变去除函数,同时确定机床的控制精度;对去除函数进行二维傅里叶变换,并基于机床控制精度对频谱进行补偿滤波,分析滤波后二维频谱在魔法角度方向下的幅值最低点的对应步距;通过调整加工路径的方向或磁流变抛光轮的姿态使得抛光轮与路径的夹角呈魔法角度的基础下,规划给定步距下的栅格路径;最终控制机床加工。本发明不需要任何附加成本,仅需改变去除函数与路径之间的夹角和路径步距至理论分析得到的最优值,轨迹状中频误差幅值理论上即可远远低于其他加工噪声而消失。该方法能实现无中频加工,且对元件低频、高频误差无任何影响。
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