摘要
电火花加工机床利用电火花加工原理加工导电材料,为了避免加工过程中电极丝在进给时发生失稳断丝,首先,将电极丝简化为Euler-Bernoulli梁,建立了具有通用性的电极丝临界摩擦力和临界锥角的计算模型.接着,以直径为0. 19 mm、长度为63 mm的钨电极丝为例,得出了其临界摩擦力和临界锥角的大小.最后,通过摩擦力测试试验验证了模型的准确性.利用该模型及其计算结果可有效避免电极丝发生失稳断丝的同时还能指导电极丝锥度的调节.
EDM machine tool is a special machine tool for processing conductive material by using EDM principle.To avoid broken wires when feeding the electrode wire in the process of machining.First,the electrode wire was simplified as an Euler-Bernoulli beam,and a generalized calculation model for the critical frictional force and critical cone angle of the electrode wire was established.Then,the tungsten electrode wire with a diameter of 0.19 mm and a length of 63 mm was taken as an example to obtain the critical frictional force and the critical cone angle,and the accuracy of the model was verified by the friction test.Finally,the accuracy of the model was verified by the friction test.Using this model and its calculation results can effectively avoid wire breakage of wire electrode and guide the adjustment of electrode taper.
作者
王民
胡建飞
刘建勇
王彦贞
WANG Min;HU Jianfei;LIU Jianyong;WANG Yanzhen(Advanced Manufacturing Technology of the Key Laboratory of Beijing Municipality,College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology,Beijing 100124,China;Beijing Municipal Key Laboratory of EDM Technology,Beijing 100191,China;Beijing Institute of Electro-machining,Beijing 100191,China;Intelligent Engineering Department,Hebei Software Institute,Baoding 071000,Hebei,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2019年第4期307-313,共7页
Journal of Beijing University of Technology
基金
北京市自然科学基金委员会-北京市科学技术研究院联合资助项目(L150006)
关键词
电火花加工机床
电极丝
临界摩擦力
摩擦力测试试验
electric discharge machine(EDM)tool
electrode wire
critical friction force
friction force test
