【作者】 于天明；

【导师】 李伟；

【作者基本信息】 浙江工业大学 ， 机械电子工程， 2009， 硕士

【摘要】 在线电解修整(ELID)磨削可实现硬脆材料高效率、超精密表面加工,已成为今后超精密磨削加工的主要手段与研究方向之一。随着新型材料与精密器件的不断开发出现,对于加工表面质量的要求越来越高。目前ELID技术主要采用铸铁结合剂砂轮,但这种砂轮存在制作困难,成本昂贵,并且对于功能材料的洁净表面加工容易造成污染等诸多问题。本研究拟采用竹炭作为砂轮结合剂,研制新型环保ELID磨削用BCB(竹炭结合剂)金刚石砂轮,结合ELID磨削技术,开发出一种制作更容易、使用更方便、加工表面质量更优良的超精密加工方法与技术,为超精密加工技术的研究与发展提供一个新的方向与途径。本文参考常规砂轮的制造工艺,依据ELID磨削技术特性,设计制定了BCB砂轮制造工艺,提出了完整的加工工艺流程。参照传统砂轮的特性参数检测方法,选择了硬度,抗压强度及摩擦磨损系数这几个特性参数作为BCB砂轮评价指标,构建了BCB砂轮的评价体系。采用XRD,SEM等先进观测手段研究不同工艺过程对砂轮组织结构的影响。使用ANSYS有限元分析软件对砂轮热压工艺过程进行了模拟仿真,通过研究热压过程中树脂固化过程,优化了热压过程的参数设置,提高砂轮性能。采用适宜的工艺参数进行ELID磨削实验,对BCB砂轮的加工特性进行了研究,BCB砂轮磨削SUS304不锈钢时的磨削比接近于1,经BCB砂轮加工的工件表面粗糙度达到0.020μm。实验结果表明BCB砂轮具有十分优良的精密加工特性。更多还原

【Abstract】 ELID is a main technology which has been widely adopted to the ultra-precision and high effectively machining of hard and brittle materials. With the development of the research and application of new materials and precision devices, requires of surface quality become higher and higher. Metal-resin bonded wheels is the main tool in ELID but it’s difficult to produce and expensive and could contaminate the clean surface of function materials. To ease this problem, this paper puts forward a new environmental friendly BCB (bamboo charcoal bonded) grinding wheel, a new ultra precision manufacturing technology which is more convenient to get a better surface quality is proposed and provide a new method and approach for the development of the ultra precision machining technology.Refer to the conventional grinding wheel manufacturing processes, according to characteristics of the technical features of ELID technology, a new manufacturing process of BCB grinding wheel is established in this paper and also the perfect processing process.Reference to the parameters of traditional grinding wheel’s detection methods, chose hardness, compressive strength and friction wear coefficient of the key parameters as BCB grinding wheel ’s evaluation parameters and construct evaluation system of the BCB grinding wheel. And the effect of different manufacturing parameters on the grinding wheel structure is also studied by XRD and SEM.A heat pressing process simulation is established by ANSYS which is a well used kind of finite element analysis software and the curing process of the phenol formaldehyde resin in the heat pressing process is studied to optimize the processing parameters of the heat pressing process and improve the performance of BCB grinding wheel.Study the machining characteristics of BCB grinding wheel in grinding experiments with appropriate parameters. The grinding ratios of BCB grinding wheel on SUS304 non-corrosive steel is about 1 and surface roughness of workpiece is 0.02μm. The experimental results show that BCB grinding wheel is a super precision grinding tool with excellent characteristics.更多还原