| Summary: | 碩士 === 國立彰化師範大學 === 電機工程學系 === 99 === The Swedish made Sandvik brand face mills and end mills are applied in this study, which has been used to investigate the tool wear and the surface tolerance of work piece during continuous milling of mild carbon steel and aluminum alloyed steel with coolant system. The tolerance is tested by Mitutoyo-SJ-401 surface analyzer and Zoller Smart-Check CNC cutting tool measurement device. The experiment is done by different conditions of cutting speed, feedrate and cutting depth to analyze the flank wear (≦0.05mm) and the surface roughness of work piece(Ra≦5µm).
The experiment shows the surface roughness Ra from minimum 0.07µm to maximum 4.95µm, the flank wear from minimum 0.015mm to maximum 0.045mm. Therefore, the performance is proved that various cutting tools under the same feed speed while high speed machining condition will reach the best tolerance. The surface of roughness is changed when different material, such as mild carbon steel or aluminum alloyed steel are applied, and Flank Wear decreases according to increasing cutting speed. Surface roughness become worse while flank wear increases. However, there is not direct relationship in between surface roughness and flank wear. The feasibility is that while the processing time decreased, the processing tolerance improved.
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