塑性材料微磨削表面质量影响因素试验研究

针对TC4钛合金和H62黄铜两种典型塑性材料进行了微尺度磨削试验研究,利用超景深显微镜与三维轮廓仪对微磨削加工表面的微观形貌进行了分析,从理论上介绍了微磨削表面形成机理以及最小切屑厚度效应.根据微磨削加工的特点,选用不同的加工参数进行单因素试验和正交试验,主要探讨了微尺度磨削速度、磨削深度及进给速度对塑性材料微磨削表面质量的影响;对比分析不同磨棒头直径、不同粒度的微磨棒以及不同磨削方式对试件加工表面质量的影响.研究表明,微磨削中工件表面粗糙度随磨削深度的增加有先减小后增大的趋势,侧磨的加工质量比槽磨的质量好.

Experimental Study on Influencing Factors of Surface Quality in Micro-grinding Plastic Materials

TC4 titanium alloy and H62 brass， as two kinds of typical plastic materials， were studied in micro-scale grinding experiment. The surface micro-morphology was investigated by using microscope with super depth of field and three-dimensional profiler. The surface formation mechanism in micro-grinding and the effect of minimum chip thickness were analyzed theoretically. Based on the characteristics of micro-grinding， both single factor and orthogonal tests were carried out with different processing parameters. The effects of grinding parameters， such as grinding speed， grinding depth and feed speed， were investigated on the micro-grinding surface quality of the plastic materials. The effects of head diameters， grit of micro-grinding rod and grinding modes on the specimen’s surface quality were also studied. The result shows that the surface roughness of ground workpiece decreases firstly and then increases with increasing the grinding depth， and the processing quality of side grinding is better than that of the groove grinding.