GH4169磨削表面粗糙度影响参数的敏感性研究

通过GH4169高温合金平面切入磨削实验,建立了表面粗糙度的经验公式,分析了表面粗糙度对磨削参数的灵敏度,获得了磨削参数稳定域和非稳定域。结合正交试验法中的极差分析方法获得了不同磨削参数对表面粗糙度的影响曲线,进行了磨削参数区间的优选。研究结果表明:表面粗糙度对磨削深度的变化最为敏感,对工件速度的变化敏感次之,对砂轮速度的变化最不敏感;磨削深度优选范围为0.01～0.015mm,工件速度优选范围为10～15m/min,砂轮速度优选范围为20～30m/s,可控制表面粗糙度在0.7μm以内。为高温合金材料磨削表面粗糙度控制提供理论方法和试验依据。

Study of Sensitivity of Parameter Affecting Surface Roughness in Grinding Superalloy GH4169

Through the plunge-cut grinding experiment of GH4169 superalloy, the experience formula of surface roughness is built, the sensitivities of surface roughness on process parameter are analyzed, the process parameter stability region and instability region are acquired. Using the extreme difference analysis method facing the orthogonal experiment, the influencing curves of process parameters on surface roughness are obtained, the optimum selection of the grinding process parameter interval is proceed. Results show that the surface roughness is most sensitive to the variety of the grinding depth, and secondly sensitive to the workpiece speed. And it is insensitive to the wheel speed. The optimum grinding depth ranges are from 0.01mm to 0.015mm, and the optimum workpiece speed ranges are from 10m/min to 15m/min and the optimum wheel speed ranges are from 20 m/s to 30m/s. The optimum grinding parameters that can control the value of roughness is about R a 0.6. The theoretical method and the test datum can be used for the surface roughness control of GH4169 superalloy.