微量润滑技术切削7075铝合金试验研究

Research on Experiment of Minimal Quantity Lubrication Technology Cutting 7075 Aluminum Alloy

采用传统切削液冷却方式加工7075铝合金时,工件表面粗糙度较高,表面质量差,资源消耗大。针对上述问题,通过对采用微量润滑切削加工7075铝合金的研究,设计了微量润滑冷却与切削液冷却的对比试验。试验结果表明,增加微量润滑喷雾油量可以在一定程度上降低工件表面粗糙度,随着喷雾油量的增加,其对工件表面粗糙度的影响减小,最终趋向平稳状态。当切削速度为200~400 m/min时,使用2种润滑方式得到的工件表面粗糙度随着速度的增加而变小;当切削速度从200~400 m/min继续增大时,采用微量润滑冷却方式得到的工件表面粗糙度随着切削速度的增加而增大,在600 m/min的切削速度时最为明显。微量润滑相比于传统切削液冷却具有更好的润滑性能,可以减少因为切削过程中润滑不良而产生的表面不良缺陷。

The traditional cutting fluid cooling method used to process 7075 aluminum alloy was subject to high surface roughness,poor surface quality,and large resource consumption.In view of the above problems,through the research on cutting 7075 aluminum alloy with micro lubrication,the comparative test between minimal quantity lubrication cooling and cutting fluid cooling was designed.The experimental results showed that increasing the amount of micro lubricating oil could reduce roughness to a certain extent.With the amount of spray oil increasing its influence on roughness decreased,and finally tended to be stable.When cutting speed was 200~400 m/min,the surface roughness processed by two minimal quantity lubrication ways decreased with the increasing of cutting speed.When the cutting speed sequentially increased from 200~400 m/min,the surface roughness with minimal quantity lubrication increased with the increasing of cutting speed,which was sequential obvious when the cutting speed was 600 m/min.The minimal quantity lubrication had better lubrication performance than that of traditional cutting fluid cooling,and reduced the surface defects caused by poor lubrication in the cutting process.