Experiment research on surface quality of high speed micro-milling stainless steel

With the rapid development of information age, stainless steel has been widely used in the aerospace, biomedicine and our daily lives. In machining, however, it is difficult to guarantee surface quality because of the great cutting force, high cutting temperature and serious machining hardening. This article primarily researched the surface quality of micro grooves on 304 stainless steel processed by high speed micro-milling machining (HSMM) respectively from four aspects of surface roughness, micromorphology, dimensional accuracy and burr. Experimental results show that feed speed is the most important influence factor on the surface quality of micro grooves. There exist less burr on the bottom of micro grooves, burr mostly distribute in the top edge of trenches. And burr quantity and height of down milling side is greater than reverse milling side. In addition, radial circular runout of cutter has also a significant impact on the size accuracy and surface roughness of specimens, which cause larger grooves width and uneven surface roughness. This research will provide theoretical basis for the selection of processing parameters and control of surface quality on stainless steel parts.