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    Influence of Milling Strategy on the Surface Roughness in Ball End Milling of the Aluminum Alloy Al7075-t6
    (Elsevier Sci Ltd, 2012) Vakondios, D.; Kyratsis, P.; Yaldiz, S.; Antoniadis, A.
    Surface roughness has an important role in the performance of finished components. End ball milling is used for achieving high surface quality, especially in complex geometries. Depending on the cutting conditions selected for ball end milling, different milling strategies can be applied. The produced surface quality is greatly affected from the selected milling strategy. The present paper examines the influence of the milling strategy selection on the surface roughness of an Al7075-T6 alloy. A number of cutting parameters are tested (axial and radial depth of cut, feed rate, inclination angles phi and omega) in order to perform 96 experiments and their results are processed using regression analysis and analysis of variance. All possible milling strategies are considered (vertical, push, pull, oblique, oblique push and oblique pull) and for each one of them, a mathematical model of the surface roughness is established, considering both the down and up milling. All models are statistically validated and experimentally verified, and can be used within the limits of the investigating cutting conditions. The polynomials produced are of the third order and the statistically most significant parameters are presented. (C) 2012 Elsevier Ltd. All rights reserved.
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    A Multilingual Virtual Environment for Shoe Design Training
    (BUCHAREST UNIVERSITY PRESS, 2009) Sahin, M.; Mihai, A.; Yaldiz, S.; Pastina, M.
    The objective of this paper is to present a virtual environment developed for shoe design training in English, Romanian, Turkish and Greek. http://www.vtcforshoedesign.com is a virtual training tool as a product of LdV projects under LLP program. The virtual training centre is a good example of the development of innovative practices in the field of vocational education and training, which is One of Leonardo da Vinci General Objectives. The virtual training tool aims to improve the Quality of VET systems and practices by contributing to "Learning to learn", which is one of Lisbon Key Competences. The paper displays how the developed content has been transferred to the virtual environment with visual aids. The paper focuses on the multilingual aspect of the modules within the virtual environment.
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    Virtual training centre for computer numerical control
    (CCC PUBL-AGORA UNIV, 2008) Sahin, M.; Yaldiz, S.; Unsacar, F.; Yaldiz, B.; Bilalis, N.; Maravelakis, E.; Antoniadis, A.
    It is a fact that virtual training has been a scope of interest for vocational training for a very long time. However, it needs more time to be more common in all specific training fields. Focusing on Computer Numerical Control (CNC) Training, new developments in the CNC machinery produce a continuous demand on enhancing the programming and technical capabilities of the involved personnel. Training on CNC should follow similar developments and in particular in their programming capabilities, automation they offer and their technical capabilities. Based on these main objectives a Virtual Training Center (VTC) for CNC has been developed and it is presented in this paper. The VTC is the main result of a multilateral Leonardo Da Vinci project witch aims to promote and reinforce Vocational Training in CNC Machines.