the usage of turbochargers in diesel engines has led to the downsizing of the motors as well as usage of the waste gates in turbochargers. any dimensional reduction in turbochargers and appurtenant leads to an enhancement on the performance of internal combustion engines and in environmental problems in terms of aerodynamic, thermodynamic and mechanical specifications for both engines and turbo...

a proton nmr method for the drtermination of salvation numbers of alkaline earth cations with hexamethyl phosphoramide (hmpa) in nitromethane (nm) as diluents is described. the method is based on monitoring the resonance frequency of hmpa protons as a function of hmpa / metal ion molar ratio at constant metalion concentration. the average salvation number of cations,  , at any hmpa / metal ion ...

In the Deep-drawing process, a blank is drawn into hollow element taking shape of die by operation punch. This process has numerous advantages and applications in automobile, aerospace, kitchenware, packaging industries. The primary purpose this study to design simulate deep drawing LS-Dyna PrePost(R) V4.6.17 using Johnson-Cook flow stress as material model. An appropriate judicious characteriz...

Abstract The Swift cup drawing test has been adopted for evaluating sheet metal deformation properties, namely the material formability assessed through limiting ratio. Since strain path of points located on flange is between uniaxial compression and pure shear, this region subjected to thickening. If thickness drawn larger than gap punch die, wall ironing will occur. Therefore, forces can lead...

A proton NMR method for the drtermination of salvation numbers of alkaline earth cations with hexamethyl phosphoramide (HMPA) in nitromethane (NM) as diluents is described. The method is based on monitoring the resonance frequency of HMPA protons as a function of HMPA / metal ion molar ratio at constant metalion concentration. The average salvation number of cations,  , at any HMPA / metal ...

The competition among sheet-metal-forming manufacturers in recent years has become more severe. Many have survived by cutting their production costs. Increasing the formability, which could reduce costs, is focus of many and engineers. In present research, to increase formability over limiting drawing ratio (LDR) cylindrical deep-drawing process, application oleophobic coating proposed. An SUS3...

Cold drawing process is one of the most used metals forming processes in industries for forming seamless tubes. This process of plastic deformation of metals occurs below the recrystallization temperature and is generally performed at room temperature. When metal is cold worked, upon the release of forming force, the springback occurs. In this paper, the springback effect of the seamless tube t...

Current techniques for cycle identification in Loran-C radionavigation receivers are reviewed and compared. A new technique is presented for use in hard-limiting receivers. It is based on the widely used analogue “half-cycle peak ratio” technique, from which it differs by being entirely digital; no additional analogue signal processing or other hardware is required. Drawing on recent advances, ...