Electrical discharge machining process, is one of the most widely used methods for machining, the electrically conductive parts. In this way the tool is not in contact with the workpiece and the hardness of workpiece does not affect the machining speed. In Electrical Discharge Machining process, selection of the correct machining parameters are effective in final cost and the quality of the pro...

The discharge characteristics of the XeF* (B~X) laser are investigated. The NF3 and Xe partial pressure of the laser gas mixture and the total gas pressure have been varied. A highest specific output energy of 4.7 J/1 with an efficiency of 0.5% was obtained from a X-ray preionized Ne/Xe/NF3 gas mixture at 6 bar with single-pulse excitation through a multichannel spark gap. PACS: 42.55.Gp, 42.60...

This paper reports an intelligent approach for process modeling and optimization of electric discharge machining (EDM). Physics based process modeling using finite element method (FEM) has been integrated with the soft computing techniques like artificial neural networks (ANN) and genetic algorithm (GA) to improve prediction accuracy of the model with less dependency on the experimental data. A...

This work aims at clarifying the fundamental mechanisms of non-equilibrium alternating current gliding arc discharge (GAD) by investigating effects gas compositions and pressures on GAD characteristics with electrical optical methods. Interestingly, glow-to-spark transition was found adding O 2 or CH 4 into argon modulating power supply. occurs attributed to fact that mode is largely affected e...

PURPOSE The aim of this study was to review the published literature investigating the accuracy of fit of fixed implant frameworks fabricated using different materials and methods. MATERIALS AND METHODS A comprehensive electronic search was performed through PubMed (MEDLINE) using Boolean operators to combine key words. The search was limited to articles written in English and published throu...

We have constructed a tool for using SMT (SAT Modulo Theories) solvers to discharge verification conditions (VCs) from programs written in the SPARK language. The tool can drive any solver supporting the SMT-LIB standard input language and has API interfaces for some solvers. SPARK is a subset of Ada used primarily in high-integrity systems in the aerospace, defence, rail and security industrie...

Electrically conductive zirconia tungsten carbide composites are attractive materials for manufacturing precision components by electrical discharge machining due to their high strength, toughness and conductivity. In this study, nanocomposite ceramics with a ytterbia samaria co-stabilized 1.5Yb-1.5Sm-TZP matrix 24–32 vol.% dispersion were manufactured spark plasma sintering (SPS) at 1400 °C 15...

This report presents the experimental study of developing a dual-core spark discharge (2C-SD) model for clean combustion. We first studied ignition probability (Pig) lean methane/air at an equivalence ratio 0.5 using 2C-SD with different spark-gaps (dgap = 1.0mm and 2.0mm) in constant volume combustion chamber. then applied to engine driving 2.5-kW generator. The results indicated that Pig is 3...