Department of Industrial Engineering

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Browsing Department of Industrial Engineering by Author "Akdogan, G."

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    The development of experimental machines in order to understand the demands of incremental sheet forming of titanium
    (Industrial Engineering, Stellenbosch University, 2011-09) Oosthuizen, G. A.; Nortje, H.; Herselman, E. J.; Akdogan, G.; Sacks, N.
    Titanium sheet-metal is extensively used for aerospace and biomedical applications. The diversified customer's demands have created a recent trend towards the small batch production. In this context incremental forming has attained great attention. Therefore, experimental machines are designed and manufactured to simulate the harsh forming conditions. In the fretting machine the combination of a normal force and small vibrations may constitute a wear phenomenon known as fretting wear. The friction and wear properties of the tool, lubrication and work piece materials are tested using the sliding test machine. The steps to evaluate and develop these machines as research tools are illustrated and discussed. The fretting- and sliding machines help to investigate suitable forming tools, forming parameters and lubricant strategies for incremental forming of titanium. It is concluded that these simulation tools provide more efficient and cost effective ways to understand the effects of changing the forming conditions.
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    Gold CIP and CIL process optimization in a capital constraint environment
    (The Southern African Institute of Mining and Metallurgy, 2017-05) Snyders, C. A.; Akdogan, G.; Bradshaw, S. M.; Van Wyk, A. P.
    ENGLISH ABSTRACT: This article focuses on the use of a model in combination with economic analysis to extract maximum value out of current gold operations, without the need for additional capital. Two South African case studies (CIP and CIL) are presented to show that an optimum point of operation exists. This optimum point of operation, however, depends on several economic factors such as the gold price, exchange rate, and utility costs in combination with plant conditions such as the feed rate and Au grade. As these parameters fluctuate, the operating conditions will have to be adjusted to achieve the maximum value. Operating at a maximum will require regular decisionmaking and adjusting of operating conditions, especially in times of a constrained economy.
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    Investigating of eco- and energy-efficient lubrication strategies for the drilling of light metal alloys
    (Southern African Institute for Industrial Engineerg, 2010) Treurnicht, N. F.; Joubert, H. J.; Oosthuizen, G. A.; Akdogan, G.
    ENGLISH ABSTRACT: Energy use will be one of the main drivers for the achievement of more eco-efficient drilling processes in the automotive industry. Industry awareness of the environmental impact of used cutting emulsions, and the negative effect on worker health, has increased sharply. This has led to innovative lubrication methods such as through-spindle minimal quantity lubrication (MQL) for drilling aluminium-silicon alloys. In this work the performance of MQL at different cutting speeds and feed rates has been investigated using infrared temperature measurements. The results indicate that MQL is a feasible eco-efficient alternative to conventional flood cooling when drilling aluminium-silicon alloys.