一维斜向超声振动辅助磨削滚动轴承钢工艺及试验研究

发布时间：2019-06-18 10:54

【摘要】：针对目前只有一维轴向、一维切向等振动方向不变的一维超声振动辅助磨削的情况,首次提出了一维斜向超声振动辅助磨削工艺方法。利用MATLAB对一维斜向超声振动辅助磨削磨粒的运动轨迹进行了模拟分析。建立了超声振动试验系统的动力学模型。通过对超声振动工作台的模态分析,研制了一维斜向超声振动辅助磨削试验系统,对不同角度下超声振动辅助磨削滚动轴承钢的磨削力及表面粗糙度值进行了研究,探究了磨削力及表面粗糙度值随超声振动方向的变化规律。多次试验结果表明,超声振动角度为67.5°附近的表面粗糙度值明显优于其他角度的表面粗糙度值,磨削力也有减小。对正交试验结果的极差分析得出:当超声振动角度为67.5°、砂轮速度为20m/s、工件速度为0.5m/min以及磨削深度为4μm时,加工后的工件表面粗糙度达到最低值,其中工件速度是影响表面粗糙度的最重要工艺参数。
[Abstract]:In this paper, a one-dimensional ultrasonic vibration-assisted grinding process is proposed for the first time in the case of one-dimensional ultrasonic vibration-assisted grinding, which is only one-dimensional axial and one-dimensional tangential direction. The motion track of the one-dimensional oblique ultrasonic vibration-assisted grinding abrasive particles is simulated and analyzed by using MATLAB. The dynamic model of the ultrasonic vibration test system is established. Through the modal analysis of the ultrasonic vibration table, a one-dimensional oblique ultrasonic vibration-assisted grinding test system is developed, and the grinding force and surface roughness value of the ultrasonic vibration-assisted grinding rolling bearing steel under different angles are studied. The change of the grinding force and the surface roughness value with the direction of ultrasonic vibration is investigated. The results show that the surface roughness value near 67.5 掳 of the ultrasonic vibration angle is obviously superior to the surface roughness value of other angles, and the grinding force is also reduced. The range analysis of the orthogonal test results shows that when the ultrasonic vibration angle is 67.5 掳, the grinding wheel speed is 20 m/ s, the workpiece speed is 0.5 m/ min and the grinding depth is 4. m In which the workpiece speed is the most important process parameter that affects the surface roughness.
【作者单位】：上海理工大学机械工程学院;
【基金】：上海市研究生创新基金资助项目(JWCXSL1402)
【分类号】：TG580.6

【相似文献】