Browsing 2002 International Solid Freeform Fabrication Symposium by Title
Now showing items 1-20 of 76
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Adhesive Bonding of Sheet for Laminated Metal Tooling
(2002)There exists a significant body of work on metal laminate tooling built by the “cut-stack-bond” approach; however, automation with this method is difficult. Building laminations by "stack-bond-cut" sequence, on the other ... -
Advancements in the SIS Process
(2003)Selective Inhibition of Sintering (SIS) is a new layer-based rapid prototyping process. This paper reports the progress in research and development of the SIS process. Specific printer path generation method, experimentation ... -
Advances in Functional Testing with SFF Parts
(2002)Functional testing of SFF parts represents an exciting area of research in solid freeform fabrication. One approach to functional testing is to use similitude techniques to correlate the behavior of an SFF model and a ... -
Analysis of the Influence of Viscoelasticity in Curl Development in SLS
(2002)Curl in selectively laser sintered parts arises mainly from thermal distortion of parts within the build volume during processing. This results in nominally flat surfaces which lie horizontally in the part bed becoming ... -
Analyzing the DMLS Process by a Macroscopic FE-Model
(2002)The presented macroscopic FE-model allows to analyze the thermal fields and the resulting stress built up during Selective Laser Sintering. Process and material parameters are focused on Direct Metal Laser Sintering ... -
Application of Laser-Based Additive Manufacturing to Production of Tools for Friction Stir Welding
(2002)This paper presents a feasibility study of application of laser-based additive manufacturing to production of tools for friction-stir welding (FSW) of materials. The design and rapid manufacturing of powerful tools has ... -
Application of SFF to Preoperative Planning and Surgical Rehearsal for Treatment of Limb Deformities in Dogs
(2002)This report describes SFF-aided assessment and preoperative planning for treatment of bilateral multifocal pelvic limb deformities in a one-year old German Shepherd dog. CT scans were converted to solid models and ... -
Application of Solid Freeform Fabrication Processes for Injection Molding Low Production Quantities: Process Parameters and Ejection Force Requirements for SLS Inserts
(2002)Studies are underway for the application of solid freeform fabrication processes for mold inserts to be used in thermoplastic injection molding of low quantities of parts. This work initially compares a laser sintered ... -
Characterization of 2219 Aluminum Produced by Electron Beam Freeform Fabrication
(2002)Researchers at NASA Langley Research Center are developing a new electron beam freeform fabrication (EB F3 ) technique to fabricate metal parts. This process introduces metal wire into a molten pool created by a focused ... -
Characterization of Selective Laser Sintering™ Materials to Determine Process Stability
(2002)The Selective Laser Sintering (SLS) process has proved to be an excellent method for prototyping functional parts out of engineering thermoplastics such as polyamides. However, the material undergoes physical and chemical ... -
The Characterization of the Performance of a New Powder Feeder for Laser Based Additive Manufacturing
(2002)Laser-based additive manufacturing (LBAM) requires precise control over the metal, ceramic, or carbide powder added to the molten pool. The feeding rate of the powder must be very consistent, and it must respond rapidly ... -
Computational Design, Freeform Fabrication and Testing of Nylon-6 Tissue Engineering Scaffolds
(2002)Approximately 100,000 people in the US alone suffer from TMJ disease to the extent that surgical reconstruction is needed. In order to reconstruct a whole joint such as the TMJ, advanced, novel fabrication methods are ... -
Design of Thermal Environment in Plastic Injection Mold Based on Evaluation of Resin Cooling Uniformity
(2002)Thermal state in plastic injection molds greatly influences the molding quality of products. This paper discusses the optimum design of thermal environment in the molds by observing and estimating the cooling uniformity ... -
Development of 3D Bit-Map-Based CAD and Its Application to Hydraulic Pump Model Fabrication
(2002)A novel 3D bit-map-based CAD has been developed. This program, named CellCAD, relies on techniques which provides easy manipulation of huge sized 3D bit-map, poly-triangle and 2D bit-map data. It can be attached to various ... -
Development of a Prototype Low-Voltage Electron Beam Freeform Fabrication System
(2002)NASA’s Langley Research Center and Johnson Space Center are developing a solid freeform fabrication system utilizing an electron beam energy source and wire feedstock. This system will serve as a testbed for exploring ... -
The Development of an Integrated Graphical SLS Process Control Interface
(2002)This paper presents the systematic development of a man/machine interface for Selective Laser Sintering. The interface developed integrates geometry design, process data/code generation, power control and communication ... -
Development of Reverse Engineering System for Machine Engineering Using 3D Bit-Map Data
(2002)In this paper, the authors describe a reverse engineering system, named BitCAT, for machine engineering using 3D bit-map data obtained from CT digitizers. BitCAT can compose B-Rep CAD models by fitting parametric primitives, ... -
Digital Micromirror Device Based Microstereolithography for Micro Structures of Transparent Photopolymer and Nanocomposites
(2003)This paper describes a Digital Micromirror Device (DMD) based ultraviolet (UV) microstereolithography (µ-SL) system developed for rapid prototyping and manufacturing of micro 3D structures. Characterization experiments ... -
Direct Selective Laser Sintering of Superalloys
(2002)The advantages of powder metallurgy lie within the large degree of freedom for material design and thus is especially used in the production of high performance parts. Layer manufacturing is an appropriate method to ...
