目的：测试不同加工参数对振动式滚磨光整加工过程中作用力的影响，对实际加工过程中加工参数的选择提供一定的数值指导。方法通过改变偏心块夹角、固定工件埋入深度及固定工件装夹角度，应用动态式压力传感器测试每种加工参数对加工作用力的影响。结果偏心块夹角不同时，磨料的运动形态及运动轨迹差异明显，且偏心块夹角大小对工件的作用力影响显著，偏心块夹角为90o时磨料螺旋运动显著，加工效果好。固定工件埋入深度越深，其所受作用力越大；超过一定范围时，作用力陡增。通过改变固定工件装夹角度，观察磨料流态并测试工件不同装夹角下所受作用力，分析得到在装夹角为20o时磨料会以工件为中心聚集，工件所受作用力最大。结论偏心块夹角不同，磨料的运动流态及对工件的作用力不同，偏心块夹角为90o时光整加工效果最好。埋入深度对工件作用力影响显著，加工过程中应根据工件的加工要求确定合适的埋入深度。固定工件装夹角度不同，磨料流态变化明显，固定工件装夹角为20o时工件所受作用力最大，需根据实际加工要求确定装夹的具体角度。
ABSTRACT:Objective To analyze the influences of process parameters on the force in vibratory barrel finishing, so as to provide certain guide for selection of process parameters in actual processing. Methods The influences of parameters such as eccentric block angle, buried depth of workpiece and the champing angle of workpiece on the force were analyzed by using dynamic pressure sensor. Results The movement forms and motion trails were significant different at different eccentric block angles, and the force of workpiece was influenced by the angle, the abrasive flow was remarkable when the eccentric block angle was 90o. The force of the workpiece increased with the buried depth, however, the force abruptly increased when the depth exceeded a certain range. During changing of the champed angle of workpiece, the abrasive flow and the force were observed and the test data showed that abrasive gathered together centered on the workpiece when α=20o, and the force of workpiece reached the maximum. Conclusion In con-clusion, the abrasive flow and the force of workpiece were different at different eccentric block angles, the effect of finishing was the best at the eccentric block angle α0=90o. The influence of buried depth on the force was significant, the buried depth should be chosen according to the processing requirements. The abrasive flow was varied at different champing anglesαof the fixed work-piece and the force was the maximum when α=20o, the α should be determined based on the processing demand.
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