动静压轴承支承电主轴服役精度保持用磁力减载研究

发布时间：2018-01-15 11:54

本文关键词：动静压轴承支承电主轴服役精度保持用磁力减载研究　出处：《振动与冲击》2017年12期 　论文类型：期刊论文

【摘要】：为了保持动静压轴承支承电主轴的服役精度,提出采用电磁力消减静动态加工力的方案并研制了一套磁力减载系统。以磨床为例,建立电主轴系统的动力学模型,获取了载荷与轴端位移的关系;估算了磨削加工时产生的静态和动态加工力,提出了服役精度保持的静/动载荷需求;设计并建造了磁力减载系统,包括结构和测控两个模块;其中,结构模块特色在于磁力减载组件配备有万向支撑方案,测控模块支持开环和闭环两种控制策略;设计专项试验验证了减载系统的性能。研究结果表明:不转时减载组件可实现约35 N静载和28 N幅值谐波动载功能,初步证明采用电磁技术消减机床加工力是可行的。针对引入减载装置的电主轴系统,采用人工调节电流的开环控制策略更有效。
[Abstract]:In order to maintain the service accuracy of the motorized spindle supported by the static and static bearing, the scheme of reducing the static and dynamic machining force by electromagnetic force is put forward and a set of magnetic load reduction system is developed. The grinding machine is taken as an example. The dynamic model of motorized spindle system is established and the relationship between load and axial displacement is obtained. The static and dynamic machining forces produced by grinding are estimated, and the requirement of static / dynamic load to maintain service precision is put forward. The magnetic load reduction system is designed and built, which includes two modules: structure and measurement and control. The characteristic of the structure module is that the magnetic load reduction module is equipped with the universal support scheme, and the measurement and control module supports two control strategies: open-loop and closed-loop. A special test was designed to verify the performance of the load reduction system. The results show that the load reduction module can realize the static load of about 35 N and the harmonic load of 28 N amplitude. It is preliminarily proved that it is feasible to reduce the machining force of machine tools by using electromagnetic technology, and the open-loop control strategy of manually adjusting the current is more effective for the motorized spindle system with load reducing device.
【作者单位】：西安交通大学现代设计及转子轴承系统教育部重点实验室;武汉理工大学能源与动力工程学院;西安理工大学机械与精密仪器工程学院;
【基金】：国家科技重大专项(2012ZX04002-091) 国家自然科学基金项目(51275395)
【分类号】：TG596
【正文快照】： 高效精密动静压轴承支承电主轴系统是决定高档数控磨床性能的关键功能部件,它直接决定了机床的加工精度、加工表面质量和可靠性等。在国际市场上,用于高档数控磨床的关键部件——高效精密静压/动静压主轴等功能部件基本已经实现系列化,如:国际领先的生产厂商德国HYPROSTATIK公

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