基于接触力控制的抛光轮磨损在线补偿策略研究 -学兔兔 www.xuetutu.com.pdf

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第31卷第5期
仪器仪表学报
Vol 31 No 5
2010年5月
Chinese Journal of Scientific Instrument
May 2010
基于接触力控制的抛光轮磨损在线补偿策略硏究
俞红祥2,徐洪,表巨龙
(1浙江师范大学交通学院金华310004;2国家精密高效磨削工程技术中心湖南大学长沙410082)
摘要:提出了一种用于玻璃多面体磨削成形加工设备的抛光轮损在线补偿策略,由抛光接触力实时估算、抛光轮磨损预测
算法和前馈-反馈混合方式接触力控制模块构成。该补偿策略无采用精密测距传感器即可解决抛光轮长期运行磨损所导致
的半径参数持续漂移。文中详细论述了抛光轮磨损在线补偿策略的原理和实现方式,并在实验室构建了玻璃多面体精密高效
磨削加工原型机,对该补偿策略进行了应用测试。从加工样本采集的测试数据与理论分析呈现了良好的一致性,验证了所提出
方法的正确性和有效性,及其在玻璃多面体磨削成形加工应用中的厂广泛应用前景。
关键词:磨削成形;抛光轮;磨损补偿;预测算法
中图分类号:TC580.692文献标识码:A国家标准学科分类代码:460.35
Study on online wearing compensation strategy for polishing
wheel based on contacting force control
Yu Ho
gulang
1.2 Xu flong
Yuan Julong
(1 College of Transportation, Zhejiang Normal liniversity, Jinhua 310004, China
2 National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha 410082, China)
Abstract: A novel online wearing compensation strategy for polishing wheel in a polyhedral glass grinding shaping
machine is proposed, which consists of real-time polishing contacting force estimation, polishing wheel wearing pre-
diction algorithms and hybrid feed-forward feed-backward contacting force control module. The compensation strategy
has the advantage of eliminating the radius excursion of the polishing wheel during long term running, while the
adoption of high accuracy displacement sensor is unnecessary. The principle and realization method of the new com-
pensation strategy are discussed in detail. To verify the validity and practical feasibility, a polyhedral glass grinding
prototype was built to test the presented compensation strategy in laboratory. Experiment result obtained from the
manufactured samples shows good agreement with theorctical analysis data, which indicates that the proposed scheme
emerges wide prospect in polyhedral glass grinding shaping applications
Key words: grinding shaping; polishing wheel; wearing compensation; prediction algorithm
期运行过程中,金刚砂轮的损耗速度远低于抛光轮损耗
1引言
速度S?,其原因在于两者采用了不同类型的固着材料。
对于电镀、真空烧结等方法制作的金刚砂暦削轮,普遍采
在玻璃多面体磨削成形加工中,伺服传动机构作为用金属線、铜基合金作为金刚砂粉末的固着剂,而抛光轮
精确进给控制平台已获得广泛运用41。为了提高生产则多采用环氧树脂等有机材料作为抛光微粉填料。这使
效率,获得高质量加工面,很多加工设备都采用了金刚砂得磨削设备在长期运行过程,抛光轮半径产生了持续、不
磨削轮与抛光轮并列运行结构,通过传动机构使工件在可忽略的几何参数偏移,并给工件表面抛光质量控制带
磨削与抛光工位间快速转换。值得注意的是,在设备长来了诸多问题°。
收稿日期:2009-07 Received Date:2009-07
基金项日:国家自然科学基金(50535040)、新江省重大科技专项(2008C01026-2)资助项