期刊
POLYMERS
卷 12, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/polym12092122
关键词
thermal effect; PMMA; micromilling; cutting chips
资金
- National Natural Science Foundation of China [51975094, 51875078, 51991372]
Poly(methyl methacrylate) (PMMA) is of growing interest in the application of microfluidic devices and high precision optical elements due to its excellent moldability and formability. Micromilling is one of the micromachining methods which has been extensively used to manufacture polymer components. In this study, a high-speed micromilling method was used to manufacture polymer with high form accuracy and surface quality. The processing temperature effects on the surface quality were investigated in detail. The dynamic mechanical analysis (DMA) experiment was used to study the material mechanical property under different temperatures. According to the DMA results, the PMMA sample is in the glass and viscoelastic state during the milling process. The cutting chips under various processing temperatures are classified into three kinds according to their shapes: roll, sheet, and sinter. The surface roughness of samples with sheet and roll cutting chips is smaller than that of sinter cutting chips. To obtain a better machining bottom surface and edge shape, the processing temperature below 70 degrees C is recommended according to the results. This work is of great value for the study of polymer removal mechanism and optimization of processing parameters for the industry.
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