基于田口试验设计的光纤激光辅助切削氧化锆陶瓷试验研究

Experimental Study of Fiber Laser-Assisted Machining Zirconia Ceramics Based on Taguchi Experiment Design

为探究激光工艺参数对氧化锆陶瓷加工表面粗糙度Ra和刀具磨损VB的影响规律,采用光纤激光器和CBN刀具对氧化锆陶瓷进行车削试验研究。用Minitab设计了激光功率、主轴转速、进给速度、背吃刀量四因素四水平的田口正交试验,并通过田口试验均值主效应进行分析。研究结果表明,各工艺参数对表面粗糙度Ra的影响由大到小排序依次为激光功率、背吃刀量、进给速度、主轴转速,对刀具磨损VB的影响由大到小排序依次为激光功率、背吃刀量、主轴转速、进给速度。激光功率越高,背吃刀量越小,工件表面粗糙度越小,刀具磨损越轻微。以工件表面粗糙度最小和刀具磨损量最小为指标,得到最佳工艺参数组合为:激光功率125 W、主轴转速550 r/min、进给速度5 mm/min、背吃刀量0.2 mm。通过与无激光辅助车削试验结果的对比分析,进一步验证了激光辅助切削可大大提高工件表面质量、减小刀具磨损。

In order to investigate the effect of laser processing parameters on surface roughness Ra and tool wear Vs of zirconia ceramics,a fiber laser and a CBN tool were used to turn zirconia ceramics.Taguchi orthogonal experiment with four factors and four levels of laser power,spindle speed,feed speed,and backstroke was designed by Minitab,and the main effect of taguchi experiment was analyzed.The results showed that the order of influence of various process parameters on surface roughness R.is laser power,backdraft amount,feed speed,and spindle speed.The order of influence on tool wear V is laser power,backdraft amount,spindle speed,and feed speed.The higher the laser power,the smaller the amount of the back,the smaller the surface roughness of the workpiece,and the lighter the tool wear.Taking the minimum roughness of workpiece surface and the minimum tool wear as indexes,the optimal process parameters are obtained as laser power of 125 W,spindle speed of 550 r/min,feed speed of 5 mm/min,and backdraft of o.2 mm.Compared with the experimental results of non-laser-assisted turning,laser-assisted machining is further verified that it can greatly improve workpiece surface quality and reduce tool wear.