再生型机床切削颤振系统稳定性极限预测

Prediction Of Stability Limits For Regenerative Machining Chatter System

机床切削加工一般都是在有振纹的表面上进行的,由振纹再生效应引发的再生型切削颤振是机床切削颤振的主要形态。本文推导了再生型切削颤振系统极限切削宽度随机床主轴转速变化的理论计算公式,提出了机床切削系统稳定性极限预测方法,并就试验系统的切削稳定性极限进行了预测,实测结果表明,试验结果与预测结果基本相符。

The calculating formulas about the limitedcutting width blim versus the spindle speed forregenerative chatter system are derived. And thenproposed the method to predict the stability limits of themachining system. The prediction of the limited cuttingwidths versus the spindle speed for testing system arecarried. The experimental results show that the testingresults are agreement kith the predicting resultsessentially. To the minimum limited cutting width(blim)min, the prediction error ratio is equal to 32%?andto the spindle speed relevant to (blim)min, the averageforecast error is less than 10%.