Qu Da, Zhang Peng, Xue Jiadai, Fan Yun, Chen Zuhui, Wang Bo
Centre for Precision Engineering, Harbin Institute of Technology, 92 West Dazhi Street, Nan Gang District, Harbin 150001, China.
Manufacturing Department, 618 Flight Automatic Control Research Institute, 92 Dianziyi Road, Yanta District, Xi'an 710065, China.
Materials (Basel). 2018 Aug 22;11(9):1497. doi: 10.3390/ma11091497.
In this study, minimum quantity coolant/lubrication (MQCL) is found to have significant impact on the surface quality and mechanical properties of the micromilled thin-walled work piece that is the core component of an aeroaccelerometer. Three kinds of coolants were used in the micromilling process to analyze their effects on surface quality and mechanical properties of the component. The experiment results show that an appropriate dynamic viscosity of coolant helps to improve surface roughness. The high evaporation rate of the coolants can enhance the cooling performance. Comparing with the dry machining case, MQCL has better performance on improving tool wear, surface quality, and mechanical properties of the micromilled work piece. It yielded up to 1.4⁻10.4% lower surface roughness compared with the dry machining case in this experiment. The machined work piece with the best mechanical properties and the one with the worst mechanical properties appeared in the ethyl alcohol and the dry machining case, respectively. The reasons for deteriorating surface quality and mechanical properties in dry machining cases are also analyzed. For improving the micromilling process, the penetration and cooling effect of the coolants are more important. This paper gives references to obtain better service performance of the component by improving the micromilling process.
在本研究中，发现微量润滑冷却（MQCL）对作为航空加速度计核心部件的微铣削薄壁工件的表面质量和力学性能有显著影响。在微铣削过程中使用了三种冷却液，以分析它们对该部件表面质量和力学性能的影响。实验结果表明，冷却液具有适当的动态粘度有助于改善表面粗糙度。冷却液的高蒸发速率可增强冷却性能。与干式加工相比，MQCL在改善微铣削工件的刀具磨损、表面质量和力学性能方面具有更好的性能。在本实验中，与干式加工相比，其表面粗糙度降低了1.4%-10.4%。力学性能最佳和最差的加工工件分别出现在乙醇加工和干式加工情况下。还分析了干式加工情况下表面质量和力学性能恶化的原因。对于改进微铣削工艺而言，冷却液的渗透和冷却效果更为重要。本文为通过改进微铣削工艺获得该部件更好的使用性能提供了参考。
