基于油膜附水滴切削液的车削加工性能的优化

将低硬度材料(不锈钢)和高硬度材料(轴承钢)作为实验材料进行车削,通过在3种不同加工方式下(油膜附水滴切削液、乳化液、干切削)的切削对比,观察切削力、粗糙度变化规律。实验结果表明油膜附水滴切削液(Oil-on-Water)能有效地降低在切削过程中的切削力;而且在运用OoW切削液加工高硬度材料的时候工件表面质量有明显提高。但是在切削硬度低材料时OoW加工表面质量比干切削要差。为了提高硬度较低材料OoW切削加工表面质量,采用二阶曲面响应法,针对粗糙度受进给量、进给速度、吃刀量影响的问题进行建模和分析。

Performance improvement of OilonWater lubrication technique in turning by Optimization

In this research, soft steels ( stainless steel) and hard steels (GCr15) were turning .A comparative study of three cooling conditions including: dry, conventional fluid cooling and OoW have been carried out. Output parameters were cutting forces, surfaceroughness.The results show that OoW can considerably decreases cutting forces in soft and hard steels. Furthermore, the surface finish and quality are significantly better when OoW technique is applied in turnning of hard steels. But in case of soft steels, surface finish is the worst in comparison to other turning environments.so, it is anticipated that OoW may not be suitable for soft steels limiting its usability range towards harder steels.Hence, to improve the performance of turnning of soft steels using OoW technique, modeling and optimization of surface roughness have been conducted.The second order surface roughness estimation model based on RSM (response surface method) has been developed. Three process parameters including depth of cut, cutting speed and feed rate have been considered for the model development