A comparative experimental investigation of deep-hole micro-EDM drilling capability for cemented carbide (WC-Co) against austenitic stainless steel (SUS 304)
A comparative experimental investigation of deep-hole micro-EDM drilling capability for cemented carbide (WC-Co) against austenitic stainless steel (SUS 304)
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DOI：
10.1007/s00170-009-2167-8
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发表时间：
2010-02-01
影响因子：
3.4
通讯作者：
Rahman, Mustafizur
中科院分区：
文献类型：
--
作者：
Jahan, Muhammad Pervej;Wong, Yoke San;Rahman, Mustafizur
微电火花加工（micro-EDM）已成为一种广泛接受的非传统材料去除工艺，可有效且经济地加工难切削但导电的材料。本研究旨在研究使用微细电火花加工在硬质合金 (WC-Co) 和奥氏体不锈钢 (SUS 304) 两种难切削材料上加工深微孔的可行性。还研究了微放电加工过程中放电能量和电热材料特性对两种工作材料性能的影响。根据所产生的微孔的质量和精度、加工稳定性、材料去除率 (MRR) 和电极磨损率，评估了两种材料的微电火花钻孔性能。结果表明，WC-Co 深孔微细电火花加工在技术上更可行，因为与 SUS 304 相比，WC-Co 不仅能提供更好的圆度和更低的过切，还能提供边缘光滑无毛刺的微孔。此外，WC-Co 在深孔微细电火花加工过程中表现出更好的切削加工性，提供相对更高的 MRR 和稳定的加工。
Microelectro-discharge machining (micro-EDM) has become a widely accepted non-traditional material removal process for machining difficult-to-cut but conductive materials effectively and economically. The present study aims to investigate the feasibility of machining deep microholes in two difficult-to-cut materials: cemented carbide (WC-Co) and austenitic stainless steel (SUS 304) using the micro-EDM drilling. The effect of discharge energy and electro-thermal material properties on the performance of the two work materials during the micro-EDM drilling has also been investigated. The micro-EDM drilling performance of two materials has been assessed based on the quality and accuracy of the produced microholes, machining stability, material removal rate (MRR), and electrode wear ratio. The results show that deep-hole micro-EDM drilling is technically more feasible in WC-Co as it offers microholes with smooth and burr-free surfaces at the rim in addition to improved circularity and lower overcut than those provided by SUS 304. Moreover, WC-Co exhibits better machinability during the deep-hole micro-EDM drilling, providing relatively higher MRR and stable machining.