Īlthough the micromachining of polymers is a relatively small topic in academic research compared to metals, certain applications provide a reasonable amount of work. Moreover, it can be emphasized that in the cutting process of polymer materials, the surface quality, dimensional accuracy, and chip formation will be affected by the changes in cutting parameters. In addition, the evaluation of the surface quality can optimize the manufacturing process parameters. For that, surface roughness and surface burrs are important characteristics of the surface quality. For the special application of polymer, the integrity of the finished surface is of great interest to qualify the quality of the workpiece in manufacturing processes. Among the various types of polymers, thermoplastics are difficult to cut due to their characteristic properties such as low modulus of elasticity, low thermal conductivity, high coefficient of thermal expansion, and internal stress. ![]() Polymers are widely used in industries such as the aerospace industry, optical engineering, and biological engineering industry due to the excellent properties such as low-density, corrosion resistance, low coefficient of friction, and the possibility of mass production. The surface quality of the brittle removal is generally better than the viscoelastic state. Base on the results, the material will be in a viscoelastic state as the temperature increases. The results show that PMMA, PEEK, and PI have good mechanical properties and machinability. In general, the surface quality of the brittle removal is generally better than that of the viscoelasticity state. 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. Through the dynamic mechanical analysis experiment, the elastic modulus and temperature effect of PMMA, PEEK, and PI are analyzed. Furthermore, mechanical property and machinability were studied in this work. Therefore, it is necessary to further study its mechanical properties and machinability, especially in ultra-precision machining. Thermoplastic polymers are considered to be one of the most promising engineering plastics in the future. It has been widely used in the fields of aerospace, optical engineering, and microfluidics, etc. ![]() 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.
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