冷等离子体和微量润滑复合微铣削铝锂合金的表面性能研究

Research on Surface Performance of Cold Plasma and Minimal Quantity Lubrication Composite Micro-milling of 2195 Aluminum-lithium Alloy

铝锂合金的延展性造成材料对刀具的粘附,会导致毛刺和积屑瘤等问题产生。为此,采用冷等离子体和微量润滑复合微铣削的方法加工铝锂合金,研究了工件的表面性能,并与单纯的干式、冷等离子体和微量润滑方法进行了对比。结果表明冷等离子体不仅改善了纳米流体在工件表面的浸润性,而且提高了材料的去除效率;相比于单纯的干式、冷等离子体和微量润滑方法,冷等离子体和微量润滑复合条件下的微铣削力分别降低了52.9%、42.9%和17.5%,而三维表面粗糙度Sa分别降低了67.3%、44.8%和33.3%。

The ductility of aluminum-lithium alloy causes material adhesion to the tool,leading to burr and chip-accumulation tumor generation,etc.In order to solve the above problems,cold plasma and minimal quantity lubrication composite micro-milling of aluminum-lithium alloys was used.The results showed that cold plasma not only improved the wettability of nanofluids on the surface of the workpiece,but also increased the removal efficiency of the material.Compared with dry,cold plasma,and minimal quantity lubrication,the micro-milling forces obtained under the composite conditions of cold plasma and minimal quantity lubrication reduced by 52.9%,42.9%and 17.5%,and the three dimensional surface roughness Sa reduced by 67.3%,44.8%and 33.3%.