TC4钛合金孔的磁粒研磨试验

Experiment of Magnetic Abrasive Finishing on TC4 Titanium Alloy Hole

采用内置磁极吸附磁性磨粒的方法,研究了工艺参数对高效去除TC4钛合金孔毛刺和切痕,降低表面粗糙度Ra,以及改善微观表面形貌的影响.首先,开展磁极与孔同轴研磨正交试验,通过极差和方差分析,获得磁极转速、磨料直径和磨料填充量对孔表面粗糙度Ra和微观形貌的影响程度,确定了较优的工艺参数组合;其次,开展磁极与孔偏心研磨试验,进行了三维力检测和数据分析.结果表明:对于φ10 mm的TC4钛合金孔,使用φ6 mm的径向磁极,偏心距1 mm研磨30 min后,孔的毛刺和切痕得以去除,表面形貌均匀平整,与同轴方案比较,表面粗糙度Ra下降13.7%,研磨效率提升25.0%.

The effects of process parameters on the efficient removal of burrs and cuts of TC4 titanium alloy hole,reduction of surface roughness R_a,and improvement of micromorphology were studied by using the built-in magnet to attract magnetic abrasive particles.Firstly,the orthogonal experiment of coaxial grinding of the magnetic pole and hole was carried out.According to the analysis of the range and variance,the effect of the magnetic pole speed,the abrasive diameter and the filling amount of abrasive on the surface roughness Ra and micromorphology were obtained,and a better combination of process parameters was determined.Secondly,the eccentric grinding test of magnetic poles and holes was carried out,and threedimensional force testing was performed on the eccentric grinding and the test data was analyzed.The results show that:forφ10 mm holes of TC4 titanium alloy,a radial magnetic pole of φ6 mm is used,the surface burrs and cuts are removed,and the surface topography is uniform and flat after 30 minutes grinding with an eccentricity of 1 mm.Compared with the coaxial grinding,the surface roughness R a is reduced by 13.7%and the grinding efficiency is increased by 25.0%.