Machining characteristics and surface intergrity of Ni-base alloy using electrical discharge machining

• Main Authors: Li, chang-cheng, 李長征
• Other Authors: 王則眾
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/59002604325767296557

碩士 === 國防大學中正理工學院 === 兵器系統工程研究所 === 92 === In order to understand the Ni-base superalloys cutting process by electrical discharge machining, Taguchi method was obtained to efficiently determine the optimum conditions for gaining higher material removal rate, lower electrode wear rate, and finer surface respectively. The grey theory was superior to Taguchi’s in dealing with the multiple quality evaluation since the latter one was adopted usually in dealing with the single quality evaluation. Thus, an integrated consideration from both methods was proposed herein to inherit benefits from both ones to accelerate the optimization process. Three kinds of methods to obtain the better composition of signal and multiple parameter: (1) Taguchi base calculation to find the optimum single machining characteristics for EDM; (2) grey theory provides the optimum multi-objective machining characteristics; (3) with non-linear regression calculation link to EDM machining function for parameter condition were altogether shown in this paper. These three steps could satisfy the need for industry manufacturing. Finally, the experiment was conducted to understand the surface transformation and characteristic of recast layer (RCL) in Ni based alloys after EDM.