超声振动辅助磨削3Cr13不锈钢孔表面粗糙度研究

Study on surface roughness after ultrasonic vibration assisted grinding on the hole of 3Cr13 martensitic stainless steel

使用立方氮化硼铣磨头对3Cr13马氏体不锈钢孔进行超声振动辅助磨削试验,探索超声振动作用对不锈钢孔磨削表面粗糙度的影响规律,并运用三维视频显微镜观测不锈钢孔的表面形貌,分析加工过程中单颗磨粒的运动轨迹及加工表面粗糙度的影响因素。结果表明:超声振动辅助磨削时,在不锈钢孔表面形成的沟槽为相互交错的正弦曲线;当其他加工参数保持不变时,超声振动辅助磨削的单颗磨粒未变形最大切屑厚度比普通磨削的小,超声振动辅助磨削3Cr13不锈钢孔的表面粗糙度值小于普通磨削时的孔表面粗糙度值。

The ultrasonic vibration assisted grinding（UAG）experiments were carried out on the hole of 3Cr13 martensitic stainless steel with CBN abrasive tools.The purpose of the experiment was to explore the effect of UAG on surface roughness.The surface morphology of the hole of stainless steel were detected using the three-dimensional video microscope. Single particle trajectories and the influencing factors on surface roughness were analyzed.The result indicated that the groove on the hole of stainless steel was sine curve with cross-cutting.The maximum undeformed chip thickness of UAG was smaller than that of common grinding when the other processing parameters remained unchanged. The surface roughness of surface ground with ultrasonic vibration was smoother than that of common ground surface.