70 research outputs found
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Integrated Decision Support System for Selection of RP Processes
This paper describes an ‘Integrated Decision Support System for the Selection of RP
Processes (IDSSSRP)’. The basic methodology proposed in the IDSSSRP is a Sigma approach
towards benchmarking of the Rapid Prototyping (RP) processes. It characterizes a RP process by
using benchmarking and the sigma approach to assess its capability compared to its potential.
Although the six-sigma approach has basically been a management concept and the success of its
implementation has been on process time reduction and quality improvement, this paper adopts
the use of six-sigma tools and benchmarking in the characterization of RP processes. Apart from
geometrical benchmarks, other benchmarks include mechanical benchmarks and process
benchmarks. Benchmarking individual RP processes facilitates standardization and reduces
variability in the prototypes produced by the processes. Following standardizations of
geometrical, mechanical and process benchmarks, a saturated database can then become very
useful in providing decision support to the end user on a particular process as well as a source of
information for benchmarking new RP machines. A case study of the benchmarking process
developed on the Direct Metal Laser Sintering-Selective Laser Sintering (DMLS-SLS) RP
process is presented using the proposed approach. This paper also outlines the working and
implementation of a web-based decision support system based on the IDSSSRP.Mechanical Engineerin
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Rapid Prototyping of 3D Scaffolds for Tissue Engineering Using a Four-Axis Multiple-Dispenser Robotic System
A desktop rapid prototyping (RP) system has been developed to fabricate scaffolds for tissue
engineering (TE) applications. The system is a computer-controlled four-axis machine with a
multiple-dispenser head. This paper presents the scaffold fabrication process to build free-form
scaffolds from relevant features extracted from given CT-scan images for TE applications. This
involves obtaining the required geometric data for the scaffold in the form of a solid model from
CT-scan images. The extracted scaffold model is then sliced into consecutive two-dimensional
(2D) layers to generate appropriately formatted data for the desktop RP system to fabricate the
scaffolds. The basic material processing involves the sequential dispensing of two or more
materials to form a strand. The four-axis system enables strands to be laid in a different direction
at each layer to form suitable interlacing 3D free-form scaffold structures. The multipledispenser head also allows the introduction of living cells and additional materials during the
scaffold building. The building of the scaffolds with the desktop RP system is described based on
the sequential dispensing of chitosan dissolved in acetic acid and sodium hydroxide solution.
Neutralization of the acetic acid by the sodium hydroxide results in a precipitate to form a gellike chitosan strand.Mechanical Engineerin
Secure CAD model retrieval and data consistency: Issues in role-based visualization
Computer-Aided Design and Applications31-4139-14
Modelling, Analysis and Fabrication of Below-knee Prosthetic Sockets Using Rapid Prototyping
10.1002/0470033983.ch10Advanced Manufacturing Technology for Medical Applications: Reverse Engineering, Software Conversion and Rapid Prototyping207-22
Effect and control of hatch length on material properties in the direct metal laser sintering process
10.1243/095440505X7957Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture219115-25PIBM
Adaptive vertex quantization for mesh compression
Computer-Aided Design and Applications41-6219-22
Collaborative product assembly design and assembly planning: Methodologies and applications
10.1533/9780857093882Collaborative Product Assembly Design and Assembly Planning: Methodologies and Applications
Evaluation of product assemblability in different assembly sequences using the tolerancing approach
10.1080/00207540600579656International Journal of Production Research44235037-5063IJPR
Evaluation of product assemblability in different assembly sequences
Proceedings of the IEEE International Symposium on Assembly and Task Planning2005168-17
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