第8期 2016年8月
组合机床与自动化加工技术
ModularMachineTool&AutomaticManufacturingTechnique
文章编号：10012265(2016)08010005
DOI:10. 13462/j. cnki. mmtamt.2016.08. 028
磁流变抛光机床防碰撞控制策略与方法
黄明，陈华，郑永成
（中国工程物理研究院机械制造工艺研究所，四川绵阳
621900)
No.8 Aug.2016
摘要：研究磁流变抛光机床防避撞控制策略与方法，是确保磁流变确定性抛光质量与效率、实现抛光工艺过程高安全可靠性的重要途径。针对磁流变抛光机床结构与磁流变抛光工艺的特殊性，系统研究了硅撞的原因及对策，提出了基准可靠传递与校核、软硬结合防护、分级投权和全流程自动控制相结合的系统防碰撞控制策略，提出并设计了基于激光测距的法向轮廊在位测量单元真实预验证抛光效果，设计了坐标基准自动校核模块、自动对刀测量单元及机床异常状态安全回退模块等碰撞预防、预知及主动应急处理安全功能，实验验证了文章提出的防碰撞控制技术的有效性，实现磁流变抛光自动化、具备适度
智能化。该技术在中国工程物理研究院研制的系列磁流变抛光机床上得以验证与工程应用。关键词：防碰撞；磁流变抛光；对刀测量；轮廊在位测量
中图分类号：TH16；TC65
文献标识码：A
The Design and Implementation of Anti-collision System for MRF Machine Tools
HUANG Ming, CHEN Hua,ZHENG Yong-cheng
( Institute of Mechanical Manufacturing Technology, China Academe of Engineering Physics , Mianyang Sichuan 621900,China）
Abstract: The anti-collision control technology for Magnetorheological (MRF) polishing machine is to en sure the fine quality and high efficiency of the deterministic magnetorheological polishing,to realize MRF's intelligence with high security and reliability. The reason for the MRF's collision was analyzed systematical ly according to MRF polishing machine structure and the special nature of the MRF polishing process. The control strategies and methods for MRF's anti-collision were put forward based on coordinate datum's trans-formation and verification, coupling software and hardware's protection,hierarchical authorization and auto-
matic control in the whole MRF's
spolishing
ging measurement for normal contour in-sit to
s.Thepap
pposed a novel method based on laser ran-
preverificate polishing's effect.The module of thebench-
s correction for MRF's polishing.
mark'sautomaticrecheckwasdesignedtoensure
ethe
ecoordinatedatum's
The unit of the automatic tool positioning
workpiece's position and pose
sdesignedto setuptheworkpiece coordinate,tomeasurethe K
and to calibrate the MRF's blade automatically.The unit for measuring the
normal contour was put forward to check polishing's effect in-site before polishing the workpiece. The mod-ule of the security rollback for the polishing head collision was designed to protect the workpiece and the ma-chine in emergency. Experiments showed the validity of the anti-collision strategies and methods with preven-tion,predictive and proactive emergency safety features. The technology is beening applied in the series MRF machines developed by CAEP such as PKC600-Q1、PKC1000-Q2 and so on, And the anti-collision system was verified in engineering applications for MRF polishing.
Key words: anti-collision;MRF polishing;probes for tool positioning; on-site profile measurement
0
引言
磁流变抛光技术作为一种超精密确定性抛光技
术，能快速获得数十纳米以下的高精度面形和1纳米以下的表面质量且近无亚表面缺陷、具有其它确定性抛光技术(如数控抛光)无法比拟的高精度、超光滑和
高效率加工工艺优势，可加工对面形精度和粗糙度要求极高的各类平面、非球面等光学元件，满足激光聚变、航天航空、太空探测等领域对大量高性能光学元件的需求[-2]。国内外针对磁流变抛光从装备构型、磁流变液及抛光工艺等方面，对磁流变抛光质量和效率进行了深入研究，但在磁流变抛光机床的工程可靠性应
收稿日期：201603-07；修回日期：201603-20
*基金项目：国家"高档数控机床与基础制造装备"科技重大专项"强激光光学元件超精密制造关键装备研制"（2013ZX04006011）
作者简介：黄明（1972一），男，四川汉原人，中国工程物理研究院机械制造工艺研究所高级工程师，博士研究生，研究方向为工艺装备安全性与可靠性、
精密计量转台研发，（E-mail)hmhy1972@163.com；通讯作者：陈华(1980—），男，四川达川人，中国工程物理研究院机械制造工艺研究所高级工程师，博士研究生，研究方向为磁流变抛光控制系统、多轴联动轮廊控制、工业过程量的无模型控制，（E-mail)mrchenhua@163.com。
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