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| 芳纶纤维复合材料高速钻削刀具磨损机理研究 |
| Tool Wear Mechanism of High Speed Drilling for Aramid Fiber Reinforced Plastic |
| Received:July 30, 2018 Revised:November 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.06.021 |
| 中文关键词: 芳纶纤维复合材料 高速钻削 失效形式 磨损机理 |
| 英文关键词: aramid fiber reinforced plastic high speed drilling failure mode wear mechanism |
| 基金项目:国家自然科学基金（51375094） |
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| 中文摘要: |
| 目的 研究高转速条件下芳纶纤维复合材料（AFRP）钻削过程中刀具的摩擦学行为。方法 采用TiAlN涂层超细微碳化钨晶粒麻花钻对芳纶纤维复合材料进行高速钻削试验。首先，研究整个寿命阶段刀具后刀面磨损规律。其次，观察分析刀具磨损处的微观形貌，深入研究刀具的失效形式与磨损机理。结果 刀具磨损可分为3个阶段，分别为初期磨合阶段、稳定磨损阶段、急剧磨损阶段，各阶段磨损速率各不相同，稳定磨损阶段最小，急剧磨损阶段最大。涂层刀具的失效形式为涂层与基体材料剥落以及后刀面磨损，磨粒磨损为主要的磨损形式，同时伴随着不同程度的粘结磨损和氧化磨损，使后刀面形成诸多凹坑和划痕。结论 丰富了复合材料高速钻削中的刀具磨损机理，并为钻削刀具的选用及性能优化提供理论与试验依据。 |
| 英文摘要: |
| The paper aims to study tribological behaviors of cutter when drilling the aramid fiber reinforced plastic (AFRP) at high speed. The TiAlN coated drill of ultra-fine tungsten carbide grain was adopted for high-speed drilling test of aramid fiber reinforced plastic. Firstly, the wear law of the tool flank face during the whole life stage was studied. Secondly, the microscopic morphology of the tool wear was observed and analysed. Then, the failure mode and wear mechanism of the tool were studied furtherly. The tool wear could be divided into three stages, including initial wear stage, stable wear stage and sharp wear stage. The wear rate varied from stage to stage, while the stable wear stage was the smallest, and the sharp wear stage was the largest. The failure mode of the coated tool was coating flaking and flank wear. The abrasive wear was the main form of wear, accompanied with different degrees of adhesive wear and oxidative wear, which caused many pits and scratches on flank face. This research enriches the tool wear mechanism in high speed drilling of composite materials. And it provides theoretical and experimental basis for the selection and performance optimization of drilling tools. |
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