Browsing by Author "Bezuidenhout, M. B."
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- ItemThe effects of selective laser melting scan strategies on deviation of hybrid parts(Southern African Institute for Industrial Engineering, 2017-11-22) Hagedorn-Hansen, D.; Bezuidenhout, M. B.; Dimitrov, D. M.; Oosthuizen, G. A.ENGLISH ABSTRACT: The use of additive manufacturing to produce intricate part geometries in the aerospace, medical, and tool-and-die industries is increasingly incorporated in manufacturing process chains. However, the high costs, long production times, and material integrity issues associated with additive manufacturing technologies such as selective laser melting make the process suitable only for certain applications. In order to reduce selective laser melting production costs for selected parts, a combination of selective laser melting and milling can be used. Metal parts produced with this method are referred to as hybrid parts. A challenge in producing hybrid parts is to reduce the geometrical deviation due to process-induced warping. This paper discusses the effects of various laser scan strategies on the deviation of hybrid parts. A newly developed scan strategy is experimentally compared with its commercial counterpart with regard to as-built part warping and porosity. The novel strategy resulted in a significant reduction in warping and porosity.
- ItemFramework to develop and evaluate process chains for resource efficiency(Faculty of Engineering, Department of Industrial Engineering, Stellenbosch University, 2016) Oettel, M. K.; Van Der Schyff, H.; Bezuidenhout, M. B.; Oosthuizen, G. A.Continuous development of new, and the improvement of existing products yields a vast collection of concepts and prototypes. Such products do not yet necessarily have established process chains. An area therefore exists for the development of novel manufacturing process chains towards the production of such products. In order to select a process chain most suited to the user’s needs, it should be evaluated with regards to the design space in which it is applied. This paper presents a framework to create and evaluate resource efficient process chains, with an application example in the context of integrated medical implants. To realize this aim, a guideline was developed to lead the user through the entire thinking process for process chain evaluation. An empty template provides the user with creative freedom to apply the included methods for idea generation. After creating process chain variations, an assessment of each is executed. An evaluation score ranks the process chains in order of suitability for its specific purpose.