Yan Ying, Mao Yu, Li Bo, Zhou Ping
Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China.
Polymers (Basel). 2020 Dec 26;13(1):69. doi: 10.3390/polym13010069.
The thermoplastic polymer such as poly(methyl methacrylate) (PMMA), polyetheretherketone (PEEK), and polyimide (PI) is a kind of polymer material with properties of good mechanical strength. It has been widely used in the fields of aerospace, optical engineering, and microfluidics, etc. Thermoplastic polymers are considered to be one of the most promising engineering plastics in the future. Therefore, it is necessary to further study its mechanical properties and machinability, especially in ultra-precision machining. Furthermore, mechanical property and machinability were studied in this work. Through the dynamic mechanical analysis experiment, the elastic modulus and temperature effect of PMMA, PEEK, and PI are analyzed. In addition, the high-speed micromilling experiment is conducted to show that the surface roughness, burrs, and cutting chip characteristics in the high-speed micromilling process. In general, the surface quality of the brittle removal is generally better than that of the viscoelasticity state. The results show that PMMA, PEEK, and PI have good mechanical properties and machinability. Base on the results, the material will be in a viscoelastic state as the temperature increases. The surface quality of the brittle removal is generally better than the viscoelastic state.
聚甲基丙烯酸甲酯（PMMA）、聚醚醚酮（PEEK）和聚酰亚胺（PI）等热塑性聚合物是一类具有良好机械强度性能的聚合物材料。它已广泛应用于航空航天、光学工程和微流体等领域。热塑性聚合物被认为是未来最有前途的工程塑料之一。因此，有必要进一步研究其机械性能和可加工性，特别是在超精密加工方面。此外，本工作对其机械性能和可加工性进行了研究。通过动态力学分析实验，分析了PMMA、PEEK和PI的弹性模量和温度效应。此外，进行了高速微铣削实验，以展示高速微铣削过程中的表面粗糙度、毛刺和切屑特征。一般来说，脆性去除的表面质量通常优于粘弹性状态。结果表明，PMMA、PEEK和PI具有良好的机械性能和可加工性。基于这些结果，随着温度升高，材料将处于粘弹性状态。脆性去除的表面质量通常优于粘弹性状态。
