主轴式滚磨光整加工过程中滚抛磨块作用力测试与分析  

Force Test and Analysis of Abrasive in Spindle Barrel Finishing Process

作　　者：陈玉楠 李文辉[1,2] 李秀红[1,2] 王秀枝[1,2] 

机构地区：[1]太原理工大学机械工程学院,太原030024 [2]太原理工大学精密加工山西省重点实验室,太原030024

出　　处：《中国表面工程》2017年第1期33-40,共8页China Surface Engineering

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)~~

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。The force on workpiece under the different processing parameters was measured in spindle barrel finishing. The rule of force and the process mechanism were investigated to provide references for theoretical analysis and practical process. By changing the mounting location of workpiece, the force was found to be a quadratic function of the distance between the workpiece and the center of drum or the free surface in the case of more than 60% of mounting location, while the rest was that of power function. Moreover, the mean force on workpiece in the direction of facing the abrasive flow is maximum, which is 4.5 to 8 times of other three directions. From the perspective of friction factor, the surface of workpiece in the direction of facing the abrasive flow is impacted and squeezed while the surface of the two parallel sides is stroked by the abrasive. Futhermore, surface texture of the square tube before and after processing were observed through three-dimensional electronically controlled ultra-depth microscope to demonstrate the above conclusion. The friction factor of the two sides in the wet condition is 0.034 and 0.18, respectively, which is much lower than that in the dry condition, 0.13 and 0.49. The friction factor is decreased substantially and the number of rolling abrasive is relatively increased, which is obvious especially in the inner side.

关 键 词：主轴式 滚磨光整加工 动态力信号 作用力 加工机理 

分 类 号：TG580.692[金属学及工艺—金属切削加工及机床]