基于微量油膜附水滴技术的切削参数优化

Impact of Oils-on-Water Cutting Fluid on Surface Roughness of Cut Edges:An Experimental Study

为探索研究微量油膜附水滴(Oils on Water,OoW)技术在切削中对表面粗糙度的影响,选出较适宜的切削用量,通过进行浇注乳化液和OoW切削液的切削工件表面粗糙度对比试验,分析了两种切削液的冷却润滑性能,再利用响应曲面法(Response Surface Methodology,RSM),选择切削速度、进给量和背吃刀量作为优化变量,表面粗糙度(Ra)作为响应性能指标,设计中心复合实验,利用Design-Expert软件建立了相对应的响应分析模型,并对所建模型进行了可靠性验证,试验结果表明,使用OoW进行切削润滑,能够更明显地降低工件表面粗糙度,通过研究工艺参数间的交互作用,得到了各工艺参数间的最优组合为:切削速度为119.97 m/min,进给量为0.14 mm/r,背吃刀量为0.48 mm。

The influence of the cutting conditions,including but not limited to the quantity of oils-on-water(OoW) cutting fluid,feed rate,cutting speed/depth,properties/materials of cutting tool and workpiece,on the surface roughness of cut edges,was investigated via center composite design of experiment,by formulation of response regression model,in Response Surface Methodology(RSM) and with Design-Expert software for optimization of the cutting conditions in OoW technique.The preliminary results show that when it comes to minimum surface roughness,OoW technique considerably outperforms the conventional emulsion injection.We suggest that with a workpiece of austenitic stainless steel,the optimized combination of cutting conditions in OoW technique may include:a cutting speed of 119.97 m/min,a feed rate of 0.14 mm/r and a cutting depth of 0.48 mm.