【作者】 马莹；

【导师】 祝明德； 周晓光； 韩福柱；

【作者基本信息】 北京邮电大学 ， 机械电子工程， 2008， 硕士

【摘要】 微细电火花加工技术在现代工业的某些领域中具有无可替代的优势。在目前的慢走丝电火花线切割机床中,大部分都是传统的四轴四联动,这种形式的机床在加工应用范围上受到很大的限制。为此,本课题在利用北京市自然科学基金项目所开发的五轴五联动电火花复合加工机的框架上针对这些问题展开了研究。当前的数控系统技术已经发展到第六代基于PC的数控系统,本课题在对数控技术的历史及发展趋势深入把握的基础上,以PC+NC的结构为框架进行了数控系统的具体开发。本文将刀具补偿功能加入到译码模块部分,在进行译码后,根据前后两段G代码对前一段G代码进行刀具补偿,并进行了加工试验,验证了刀具补偿程序的正确性,完善了刀具补偿功能,实现了精密加工。插补是数控机床最基本也是最主要的功能,本文对数控系统的直线插补功能进行了开发,然后在直线插补的基础上开发了圆弧插补功能,并进行了加工验证试验,证明了插补程序的正确性。在完善了数控系统后,针对目前加工工艺的研究热点,进行了微细阵列电极的加工实验,探讨了加工过程中的各种影响因素,最终加工出了长1mm、横截面为40μmx40μm的5×5阵列电极。另外针对另一微细加工的热点,本文利用RC电源进行了镜面的加工实验,并成功加工出了表面粗糙度为R_a49nm的镜面。更多还原

【Abstract】 The Micro-EDM has insurmountable advantages in modern industry. At present, most of the Low Speed WEDM machines have four degree-of-freedom (DOF), so the application of this kind of machine has been restricted greatly. In order to solve this problem, the author carried out the study by using a multifunctional five DOF EDM machine, funded by Beijing Natural Science Foundation.NC technology develops very fast and now it has developed to the sixth generation which is based on Personal Computer (PC). Based on the knowledge of the history and trend of NC develop, the author choose PC+NC framework as the basic frame to develop NC system. In order to actualize precision machining, it’s necessary to improve the NC cutter compensation function. In this article, cutter compensation function is inserted to the decode module. After decoding the G code, the program will progress the cutter compensation in terms of the former G code and the later G code. With the improved cutter compensation function, the cutter compensation experiment is conducted to verify the program. Meanwhile, since interpolation is the most basic and most important function for a NC machine, in this article, the author firstly develops the line interpolation function. Then on the basis of line interpolation function, circular interpolation function is developed. In the end an experiment of circular interpolation is processed.With the improved NC system and aiming at the hotspot of the machining technics, an experiment of micro-electrode array machining is carried out to disclose the influencing factors in the machining progress. In the end, the 5×5 micro-electrode array in which the cross section of each element is 40μm×40μm and its length is 1mm is manufactured. As to the other hotspot of machining technics, mirror electro-discharge machining is progressed using RC pulse generator and the mirror surface has been reached with surface roughness R_a49nm.更多还原