基于砂轮径向振动主动控制的ELID内圆磨削

摘要/Abstract

摘要：

在线电解修整(ELID)磨削过程中砂轮表面会生成一层具有一定厚度的氧化膜,其刚度远小于工件及砂轮结合剂的刚度,可以有效衰减磨削过程中的振动。将ELID技术应用到无心内圆磨削中,通过调节电解参数来改变氧化膜的状态,进而对砂轮径向振动进行控制。通过试验研究了电解参数的改变对砂轮径向振动的影响规律,并基于此规律设计了控制器,对磨削过程中的砂轮径向振动进行了主动控制磨削试验。试验结果表明,该控制器可以将磨削过程中的砂轮径向振动控制在设定值附近，维持ELID磨削的稳定。在实际的ELID内圆磨削中,可以先将砂轮径向振动控制在较高值,以实现较大的材料去除率;一段时间后再将砂轮径向振动控制在较低值，以提高工件表面质量。

关键词: 在线电解修整(ELID), 内圆磨削, 砂轮径向振动, 主动控制

Abstract:

The stiffness of oxide layer formed on wheel surface was much lower than that of workpiece and wheel bond in ELID grinding, so that the oxide layer can absorb and damp the wheel radial chatter. In order to avoid negative effects of the chatter on grinding efficiency and quality, the ELID was applied in centerless internal grinding. The wheel radial chatter was controlled by adjusting electrical parameters, and the law of this control was studied by experiments. Based on the above analyses, a series of fuzzy controllers were designed to stabilize the chatter within a certain range in ELID internal ceterless grinding. The grinding performance was studied under the active control experiments used different chatter set-points. The results show that, comparison with the ELID grinding without control, good surface quality and low material removal rate can be obtained with smaller chatter set-point; poor surface quality and high material removal rate can be obtained with larger chatter set-point.

Key words: electrolytic , in-process , dressing(ELID);internal , grinding;wheel , radial chatter;active , control

中图分类号:

李秦峰, 任成祖, 张斌, 李德成, 陈晓峰. 基于砂轮径向振动主动控制的ELID内圆磨削[J]. 中国机械工程, 2015, 26(9): 1179-1183.

Li Qinfeng, Ren Chengzu, Zhang Bin, Li Decheng, Chen Xiaofeng. Internal ELID Grinding Based on Active Control of Wheel Radial Chatter[J]. China Mechanical Engineering, 2015, 26(9): 1179-1183.

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