磨削参数对GH4169高温合金磨削表面特征影响研究

采用单因素试验法，使用不同特性的砂轮进行GH4169高温合金的外圆磨削试验,研究了单晶刚玉砂轮和CBN砂轮对GH4169高温合金磨削表面特征中表面粗糙度和表面形貌的影响,分析了各磨削工艺参数对表面粗糙度的影响规律,并分析了单晶刚玉砂轮和CBN砂轮切屑的形态,还检测了磨削加工的表面形貌。结果表明：采用粒度为80、中软级、陶瓷结合剂的单晶刚玉砂轮磨削GH4169高温合金时,其磨削表面粗糙度较小,表面特征较稳定;磨削进给运动轨迹构成了试件已加工表面形貌轮廓的主要特征。在工件速度为8~21.66m/min、砂轮速度为15~30m/s、径向进给量为0.005~0.02mm、纵向进给量为1.3~3.6mm/r范围内,可以保证表面粗糙度Ra在0.14μm以内。

A Study of Influence of Grinding Parameters on Surface Characteristics during Grinding GH4169 Superalloy

The cylindrical grinding experiments by using different characteristics for  the grinding wheel of the GH4169 superalloy were studied by the single factor experimental method.The influence of the single crystal corundum wheels and CBN wheels on surface roughness and surface topography in the grinding surface characteristics of GH4169 superalloy were researched,the influence regularity of grinding parameters on the surface roughness and chip shape was analysed,and the grinding surface topography was observed.The results show that,when cylindrical grinding GH4169 superalloy by using the single crystal corundum wheels,with particle size for 80,ZR1,the binders for ceramic,the surface characteristics is more stable,and the surface roughness is lower,the trajectory of grinding feed movement constitutes the main feature of the machined surface topography.However,with the workpiece speed ranging from 8m/min to 21.66m/min,the wheel speed from 15m/s to 30m/s,the radial feeds from
0.005mm to 0.02mm,the longitudinal feed from1.3~3.6mm/r to 3.6mm/r,the surface roughness can be controlled within the value of  0.14μm.