【作者】 金柏冬； 曹国辉； 王振龙； 赵万生；

【Author】 JIN Baidong CAO Guohui WANG Zhen-long ZHAO Wansheng (School of Mechatronic Engineering, Harbin Institute of Technology, Harbin 150001, China)

【机构】 哈尔滨工业大学机电工程学院；

【摘要】 提出一种新的微细电火花加工方法,通过合理选择加工条件将金属材料放电沉积在工件上。先对空气中微细放电沉积与去除可逆加工的基本原理进行分析,然后采用钢、铜、钨为工具电极,高速钢材料为工件,在空气中沉积出简单圆柱体和连续柱并进行了选择性的去除加工,进而实现材料的可逆加工。对沉积材料显微硬度和组织结构进行测试和分析,发现沉积物的显微硬度较原电极材料有显著提高,中心结构致密,与工件材料结合紧密。更多还原

【Abstract】 This paper describes a new micro-electrical discharge machining (micro-EDM) method to deposit metal material on workpiece with proper processing conditions. Basic principles of micro-electrical discharge deposition and removing in air is analyzed firstly. Then with steel, tungsten and copper as tool electrodes, steel as workpiece, the micro-structures of simple and sequential cylinders are deposited and removed in air, thus the reversible machining of material can be realized. The analysis of deposition materials’ microhardness and level of organization shows the deposited material is more hardened than the electrode material, in the meantime compact in center and close to base.更多还原