硬质合金立铣刀螺旋槽磨削表面粗糙度模型研究

发布时间：2018-07-31 06:45

【摘要】：基于立铣刀螺旋槽的加工原理,根据安装参数确定砂轮磨削螺旋槽的磨削接触区;分析螺旋槽磨削接触区内砂轮与工件的等效直径和有效速度,发现立铣刀螺旋槽磨削既有外圆磨削的特点也有内圆磨削的特征。考虑硬质合金工件材料塑性隆起和砂轮速度与工件速度之间夹角对表面粗糙度的影响,建立立铣刀螺旋槽磨削表面粗糙度计算模型,分析砂轮直径、砂轮速度和工件进给速度对磨削表面粗糙度的影响。在五轴联动数控工具磨床上使用金刚石平行砂轮进行螺旋槽磨削试验。使用超景深显微镜对立铣刀螺旋槽磨削表面形貌进行分析,使用白光干涉仪测量螺旋槽磨削表面粗糙度大小。试验结果验证了硬质合金立铣刀螺旋槽磨削表面粗糙度计算模型的正确性。该模型为其他整体式刀具螺旋槽磨削表面粗糙度的计算提供了理论参考。
[Abstract]:Based on the machining principle of helical groove of end milling cutter, the grinding contact area of grinding spiral groove is determined according to the installation parameters, and the equivalent diameter and effective speed of grinding wheel and workpiece in contact zone of grinding spiral groove are analyzed. It is found that the helical groove grinding of the end milling cutter has both the characteristics of external grinding and internal grinding. Considering the influence of the plastic bulge of cemented carbide workpiece material and the angle between wheel velocity and workpiece velocity on surface roughness, a calculating model of grinding surface roughness for helical groove grinding with end milling cutter is established, and the diameter of grinding wheel is analyzed. The influence of grinding wheel speed and workpiece feed speed on grinding surface roughness. The experiment of spiral groove grinding with diamond parallel grinding wheel is carried out on the five-axis NC tool grinder. The grinding surface morphology of helical groove of milling cutter was analyzed by using hyper-depth microscope, and the surface roughness was measured by white light interferometer. The experimental results verify the correctness of the model for calculating the surface roughness of spiral groove grinding with cemented carbide end milling cutters. The model provides a theoretical reference for the calculation of surface roughness of spiral groove grinding with other monolithic cutting tools.
【作者单位】：湖南大学机械与运载工程学院;
【基金】：国家科技重大专项资助项目(2012ZX04003-041)
【分类号】：TG580.6

【相似文献】