主轴式滚磨光整加工过程中滚抛磨块作用力测试与分析

发布时间：2019-01-07 14:27

【摘要】：在不同加工参数下,通过测试主轴式滚磨光整加工中工件受滚抛磨块作用力情况,寻找工件在加工中的受力规律并研究其加工机理,以此对理论分析和实际加工提供参考依据。改变工件安装位置发现,超过60%的位置处滚抛磨块对工件表面作用力与工件距滚筒中心距离或工件没入滚抛磨块深度成二次函数关系,其余均为幂函数关系,并且在正对磨块流处工件所受平均作用力最大,为其他3个方位处的4.5~8倍。同时,从摩擦因数角度分析,滚抛磨块对正对磨块流处的工件表面主要为碰撞和挤压作用,两侧处主要为刻划作用,并通过三维电控超景深显微镜观察方管加工前后的表面纹理加以论证。滚抛磨块润湿后,内外侧摩擦因数分别为0.034和0.18,远低于干燥时的0.13和0.49,说明润湿后,摩擦因数大幅减小,滚抛磨块滚动数量相对增多,尤其是内侧变化更为明显。
[Abstract]:Under different machining parameters, by testing the action force of the workpiece by the roller grinding block, the force law of the workpiece in the machining process is found and the machining mechanism is studied, which provides a reference for theoretical analysis and practical machining. By changing the installation position of the workpiece, it is found that the force acting on the workpiece surface at more than 60% position has a quadratic function relationship with the distance between the workpiece and the center of the roller or the depth of the workpiece not entering the grinding block, and the rest are power function relations. The average force on the workpiece is the largest, which is 4. 5 times of that at the other three directions. At the same time, from the angle of friction coefficient, the surface of the workpiece is mainly collided and extruded on the right side of the grinding block, and the two sides are mainly characterized. The surface texture of square tube before and after machining was observed with three dimensional electronic control depth of field microscope. After wetting, the internal and external friction coefficients of the grinding blocks are 0.034 and 0.18, respectively, which are lower than those of the dry grinding blocks, which indicates that the friction coefficient decreases significantly and the rolling number of the grinding blocks increases relatively after wetting. Especially the medial change is more obvious.
【作者单位】：太原理工大学机械工程学院;太原理工大学精密加工山西省重点实验室;
【基金】：国家自然科学基金(U1510118) 教育部高等学校博士学科点专项科研基金(20131402110002) 山西省科技攻关项目(2015031011-3)~~
【分类号】：TG580.6

【参考文献】