期刊刊名：修平學報 　 卷期：31期

篇名出版日期：2015年10月1日

作者：江可達,張浮明,劉南明,周志忠,Ko-Ta Chiang,Fu-Ming Chang,Nun-Ming Liu,Chih-Chung Chou

語言：English

關鍵字：Modeling,powder mixed electrical discharge machining,machinability evaluation,Response surface methodology,建模,粉末混合放電加工,加工性能,反應曲面法

被點閱次數：3次

閱讀時間：52sec

摘要：
For the powder mixed electrical discharge machining (PM-EDM) process, the aluminum powder particle suspended in the dielectric fluid disperses and uniforms the discharging energy dispersion, and displays multiple discharging effects within a single input pulse. The objective of this paper was to present the mathematical models for modeling and analysis of the effects of processing parameters, including the discharge current, pulse on time, grain size and concentration of aluminum powder particle, on the machinability evaluation in terms of material removal rate (MRR), electrode wear ratio (EWR) and surface roughness (SR) in the PM-EDM process of cobalt-bonded tungsten carbide. An experimental plan of a central composite design (CCD) based on the response surface methodology (RSM) was employed to carry out the experimental study. This study highlighted the development of mathematical models for investigating the influences of processing parameters on the machinability evaluation, and the proposed mathematical models in this study had proven to fit and predict values of performance characteristics close to those readings recorded experimentally with a 95% confidence interval. Results show that the effect of aluminum powder particle added in the dielectric fluid promotes both the values of MRR and EWR, simultaneously. The value of SR decreases with an increase of powder concentration, and increases with an increase of grain size for various powder concentrations. The discharge current and the pulse on time have statistically significant on the values of MRR, EWR and SR.

　　　　　[全文下載]