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1.
Rapid prototyping processes give new possibilities to numerical copying techniques
Ivo Pahole, Igor Drstvenšek, Mirko Ficko, Jože Balič, 2005, original scientific article

Abstract: Due to the appearance of numerically controlled machine tools the conventional copying from physical model has almost lost its importance. Instead, the model of numerical copying is widely used. Until recently, geometry could be copied predominantly in the touching manner and the manufacture of copied - measured shapes on CNC machine tools mainly did not pose o problem. However, because of the introduction of optical copying of geometrical data it is possible to copy the shapes which, sometimes, cannot be made by conventional machining processes (small radii of curvature, negative angles, etc.). The paper describes how these problems can be solved with layered technology processes within a very short time.
Keywords: manufacturing technologies, prototype generation, rapid prototyping, numerical copying, CAD/CAm, digitalization
Published: 01.06.2012; Views: 1207; Downloads: 79
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2.
Additive fabrication in metallurgy - case study of grey cast iron valve production
Bogdan Valentan, Igor Drstvenšek, Tomaž Brajlih, Peter Sever, Simon Brezovnik, Jože Balič, 2010, professional article

Abstract: Additive Fabrication technologies are well known from the last two decades. In that time Additive Fabrication technologies have evolved from strictly prototype part production into an option that can also be used to produce end-user parts. With development of Additive Fabrication machines capable of producing metal parts, a complete substitution of conventional metal casting technologies is possible. However, direct Additive Fabrication of metal parts is still not time/cost effective when producing large volume parts, and nowadays there is still lack of materials that can be used on those machines. This paper presents a method how a conventional sand casting process can be assisted by Additive Fabrication technologies. A sand mould pattern is produced by Selective Laser Sintering. Additive Fabrication is also used in direct manufacturing of cores.
Keywords: gray cast iron, layered technologies, rapid prototyping, rapid manufacturing, sand casting
Published: 31.05.2012; Views: 1609; Downloads: 15
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