International Journal of Computer Integrated Manufacturing. Jun2007, Vol. 20 Issue 4, p387-395. 9p. 7 Diagrams, 7 Charts.
Rapid prototyping, Prototypes, Concurrent engineering, CAD/CAM systems, Computer integrated manufacturing systems, and Computer industry
Current rapid prototyping techniques have been used to produce freeform solid models. This usually involves new dedicated fabrication machines incurring costly capital additions, maintenance and materials. In the current paper, an approach is proposed where rapid layered prototypes are fabricated using standard generic 2D machining systems and commonly available sheet materials. The process necessitates the decomposition of a computer aided design (CAD) object into cross-sectional profile layers. From these machined profiles, they are then constituted to form the prototype. Several prototypes of varying sizes having quite complex internal and external profiles have been fabricated. A discussion into the merits and potential limitations of this approach is also made. [ABSTRACT FROM AUTHOR]
International Journal of Product Development, 2004, 1, 2, 147.
rapid prototyping, rapid tooling, rapid manufacturing, 3D printing, solid freeform fabrication, CAD, solid modeling, medical modeling, RP materials, layered manufacturing, and reverse engineering.
This paper provides an overview of the information published in Wohlers Report 2003, a 270-page market study. The report addresses many aspects of rapid prototyping, including: industries served; applications; revenues; unit sales; forecasts. It also provides current information on industry trends and developments in the areas of service providers, advanced approaches to tooling, system manufacturers and technology advances in the USA, Europe, Asia and other parts of the world. The report covers research and development activities, growth trends in CAD solid modelling, rapid prototyping materials, medical modelling, rapid manufacturing and reverse engineering. Wohlers Report 2003 concludes with a discussion of the future of rapid prototyping â€“ where it is headed and what is expected â€“ to assist in strategic and tactical planning.
Prototypes, Manufacturing processes, Virtual reality, Computer simulation, and Stereoscopic views
This paper proposes a CAVE-based multi-material virtual prototyping (CMMVP) system for immersive stereoscopic visualisation and optimisation of multi-material layered manufacturing (MMLM) processes. The CMMVP system consists mainly of a suite of software packages for simulation of MMLM processes, integrated with a multi-screen CAVE-based virtual reality (VR) system, to create an immersive virtual environment for digital fabrication of multi-material product prototypes. In comparison with desktop-based or semi-immersive VR systems, the CMMVP system blocks out environmental disturbances such that designers can fully immerse in performing stereoscopic visualisation and quality analysis of the resulting multi-material prototypes for subsequent improvements of a product design. The CMMVP system facilitates advanced product design and helps reduce product development time and cost substantially. [ABSTRACT FROM AUTHOR]
International Journal of Product Development. 2004, Vol. 1 Issue 2, pN.PAG. 0p.
Rapid prototyping, Research, Planning, Technology, and Revenue
This paper provides an overview of the information published in Wohlers Report 2003, a 270-page market study. The report addresses many aspects of rapid prototyping, including: industries served; applications; revenues; unit sales; forecasts. It also provides current information on industry trends and developments in the areas of service providers, advanced approaches to tooling, system manufacturers and technology advances in the USA, Europe, Asia and other parts of the world. The report covers research and development activities, growth trends in CAD solid modelling, rapid prototyping materials, medical modelling, rapid manufacturing and reverse engineering. Wohlers Report 2003 concludes with a discussion of the future of rapid prototyping -- where it is headed and what is expected -- to assist in strategic and tactical planning. [ABSTRACT FROM AUTHOR]
A stochastic model has been developed for studying the mechanical error in different rapid prototyping (RP) processes. Tolerances and clearances, which cause mechanical error, have been assumed to be random variables. The coordinates of a point on the work surface traced by the laser beam or the tip of the extruder head is expressed as a function of the random variables involved in the process. Using a unified approach for the RP processes, the mechanical error in the fused deposition process is analysed. In a numerical example, the mechanical error has been found for a grid of points traced by the nozzle tip. The three-sigma bands of the error in tracing example curves are plotted. This is the band in which the nozzle tips of 99.73% of machines, produced on a mass scale, lie for the given tolerances and clearances. Stringent values of tolerances and clearances reduce the error at the nozzle tip, but the cost of manufacturing and assembling the machines may become prohibitive. [ABSTRACT FROM AUTHOR]
The paper reports on the original concept of introducing Resource-Negotiating (RN) agents into telemanufacturing. Human users submit a design file that they want manufactured. The machine that will be selected to manufacture the design file has to fall within the user's constraints. An agent visits several processing facilities called Distributed Manufacturing Resources (DMRs) and negotiates with an agent at each location for the most suitable machine. The agents use a plan to find resources and use negotiation skills to acquire the most suitable manufacturing resource. The entire process is done in a secure environment as the design files could contain valuable information such as early prototypes of products. Experience gained from the negotiations should be stored to allow future agents to benefit from previous negotiations. The components that are needed to implement the above and the results of the implementation are discussed in this paper.
International Journal of Manufacturing Technology & Management. 2013, Vol. 27 Issue 1-3, p47-73. 27p.
Manufacturing processes, Rapid prototyping, Three-dimensional printing, Surface finishing, and Machine parts
The article discusses the role of build orientation on rapid prototyping or layered manufacturing (LM) and its impact on fabricated parts and the improvement of part quality. Topics include the LM process and the impact of build orientation on surface finish. It adds that build orientation improves parts quality and affects the manufacturing cost and part strength.
The article reports that the objects made of multiple materials are now increasingly being used in engineering applications. Such objects are also known as heterogeneous objects. To manufacture these heterogeneous objects by rapid prototyping , a computer added design model is required that contains both geometric information as well as material information of the objects.