Liang Zhiqiang, Gao Peng, Wang Xibin, Li Shidi, Zhou Tianfeng, Xiang Junfeng
Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China.
Micromachines (Basel). 2018 Nov 2;9(11):568. doi: 10.3390/mi9110568.
Tool wear is a significant issue for the application of micro end mills. This can be significantly improved by coating materials on tool surfaces. This paper investigates the effects of different coating materials on tool wear in the micro milling of Ti-6Al-4V. A series of cutting experiments were conducted. The tool wear and workpiece surface morphology were investigated by analyzing the wear of the end flank surface and the total cutting edge. It was found that, without coating, serious tool wear and breakage occurred easily during milling. However, AlTiN-based and AlCrN-based coatings could highly reduce cutting edge chipping and flank wear. Specifically, The AlCrN-based coated mill presented less fracture resistance. For TiN coated micro end mill, only slight cutting edge chipping occurred. Compared with other types of tools, the AlTiN-based coated micro end mill could maximize tool life, bringing about an integrated cutting edges with the smallest surface roughness. In short, the AlTiN-based coating material is recommended for the micro end mill in the machining of Ti-6Al-4V.
刀具磨损是微型立铣刀应用中的一个重要问题。通过在刀具表面涂覆材料可以显著改善这一问题。本文研究了不同涂层材料对Ti-6Al-4V微铣削中刀具磨损的影响。进行了一系列切削实验。通过分析端刃面磨损和总切削刃来研究刀具磨损和工件表面形貌。结果发现，在不涂层的情况下，铣削过程中容易发生严重的刀具磨损和破损。然而，基于AlTiN和AlCrN的涂层可以大大减少切削刃崩刃和后刀面磨损。具体而言，基于AlCrN的涂层铣刀表现出较低的抗断裂性。对于TiN涂层微型立铣刀，仅发生轻微的切削刃崩刃。与其他类型的刀具相比，基于AlTiN的涂层微型立铣刀可以最大限度地延长刀具寿命，使切削刃具有最小的表面粗糙度。简而言之，在Ti-6Al-4V加工中，推荐基于AlTiN的涂层材料用于微型立铣刀。
