Browsing by Author "Ünver, Ertu"
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Publication Application of carbon reinforced composites and rapid prototyping in low volume automotive production(Carl Hanser Verlag, 2016-10-01) Durgun, İsmail; Kuş, Abdil; Çankaya, Oğuzhan; Ünver, Ertu; Durgun, İsmail; KUŞ, ABDİL; ÇANKAYA, OĞUZHAN; Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü; 0000-0002-9031-6353; AAK-6269-2021; HQZ-2102-2023; AAH-6014-2019; AAG-9412-2021In this publication, a method was developed for the production of plastic parts for the use in low volume automotive production. The hollow parts having a complex geometry were produced in blown plastic injection molds. The part production method employed a combination of carbon fiber reinforced composites and rapid prototyping technology. Surface operations were applied on the core model and the effects of the surface quality were researched as a case study. The fused deposition modeling method was used to build the core from soluble material. This technique affected the inside surface roughness and quality of the final parts. As these types of components require smooth surfaces for good air flow and low resistance, the surface area of the physical model of the soluble core was unfortunately too rough to be used directly in the carbon fabric application process and consequently, required preliminary surface treatment in order to improve the surface quality of the manifold part. Specimens were fabricated using different surface treatments in order to determine the smoothest surface quality. The best result was obtained using the acetone-gelcoat post-processing method.Item A comparative study of 3D scanning in engineering, product and transport design and fashion design education(Wiley, 2009-09) Ünver, Ertu; Taylor, Andrew; Kuş, Abdil; Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu.; AAG-9412-2021; 57196667786The aim of this paper is to evaluate the use of three-dimensional (3D) scanning technologies for design and engineering courses. This paper will provide a comparative discussion of the current 3D scanning technologies; and then describes three experimental studies in engineering, transport design and fashion design. Using 3D scanner technology the experiments tested the transferral of a variety of different data from scanned organic 3D shapes to 3D CAD packages for learning and teaching in undergraduate education.Item Experimental investigation of sheet metal forming using a recyclable low melting point alloy tool(Walter de Gruyter, 2016-05) Ünver, Ertu; Jagger, Brian; Doruk, Emre; Fındık, Fehim; Durgun, İsmail; Sakin, Ali; Kuş, Abdil; Uludağ Üniversitesi/Teknik Bilimler Meslek Yüksekokulu/Makine ve Metal Teknolojileri Bölümü.; AAG-9412-2021; 57196667786Due to intense competition in automotive industry, new car models have to be launched as quickly as possible. A re-evaluation of the design and development phases has reshaped product development in order to get product earlier than competitors. Prototype production is one of the longest stages of product development due to physical verification activities. Shortening of this process will provide more opportunity to get project schedule earlier. Rapid prototype technologies are usually used as a guide for visual and packaging analysis. However, there is a requirement to use these parts for functional testing as well. Developing alternative rapid tooling methods which shorten the physical prototype production phase, while adequately supporting visual, packaging and functional aspects of sheet metal forming, can lead to considerable savings in vehicle prototype development. In this study, sheet metal prototype part using recyclable low melting point alloy was experimentally investigated by analysing dimensional conformance of tools and parts. In addition to wear performance, thickness reduction was investigated for stamped parts.Item A study of injection moulding with bismuth alloy(CRC Press, 2013) Ünver, Ertu; Jagger, Brian; Durgun, İsmail; Bartolo, H. M.; Bartolo, P. J. D.; Alves, N. M. F.; Mateus, A. J.; Almeida, H. A.; Lemos, A. C. S.; Craveiro, F.; Ramos, C.; Reis, I.; Durao, L.; Ferreira, T.; Duarte, J. P.; Roseta, F.; Costa, E. C. E.; Quaresma, F.; Neves, J. P.; Kuş, Abdil; Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü.; AAG-9412-2021; 57196667786There is a demand to produce parts in small quantities, using cost effective injection moulding processes. The emerging economic case suggests there will be advantages in producing injection moulding tools for short duration low volume production runs where the tool is rebuilt for each manufacturing cycle. CAD/CAM, Rapid Prototyping (RP) and digital technologies help to bring new products to market faster. Mould inserts are traditionally produced using expensive and time consuming CNC machining processes. This article presents development of an injection moulding tool where rapid tooling, bismuth-tin mould insert and injection moulding are used to manufacture one hundred plastic parts. It describes the manufacturing methods applied and the use of manual and 3D scanning methods. It also evaluates the surface finishes and dimensions of the parts produced in the tool.