Accepted Papers


  • The influence of discharge parameters on the surface and the debited volume to the EDM
    Sebhi .A, University of M'Sila, Algeria. Braternitz .V; Markert. F, University of Berlin, Germany.
    ABSTRACT
    Finding ways of precise machining and cutting circonstances such as the hardness of metal machining, leads us straight to the use of unconventional methods such as electric discharge machining, electrolytic machining, laser machining etc... In fact, the machining of molds for plastic injection, aluminum injection still requires an extreme precision and a best possible surface for the extraction of parts produced without possible deformation or fixing. Technically, electroerosion allows a very greater precision and a possible unequaled details with other processes. The aim of this study is to familiarize the manufacturer with this machining process by studying the interactions discharge parameters and their influence on the surface finish and the volume of chips debited to electroerosion. The results are given in the form of curves, which will enable us to choose the optimal regimes for pulse generators encountred in the workshop. But, the process has some major disadvantages that must be taken into consideration in order to carry out the machining operations in good conditions.
  • The Implementation of a Numerical Technique to Thermal Design of Fluidized Bed Cooler
    Damiaa Saad Khudor, Almustansiriyah University, Iraq
    ABSTRACT
    The paper describes an investigation for the thermal design of a fluidized bed cooler and prediction of heat transfer rate among the media categories. It is devoted to the thermal design of such equipment and their application in the industrial fields. It outlines the strategy for the fluidization heat transfer mode and its implementation in industry. The thermal design for fluidized bed cooler is used to furnish a complete design for a fluidized bed cooler of Sodium Bicarbonate. The total thermal load distribution between the air-solid and water-solid along the cooler is calculated according to the thermal equilibrium. The step by step technique was used to accomplish the thermal design of the fluidized bed cooler. It predicts the load, air, solid and water temperature along the trough. The thermal design for fluidized bed cooler revealed to the installation of a heat exchanger consists of (65) horizontal tubes with (33.4) mm diameter and (4) m length inside the bed trough.