1992 International Solid Freeform Fabrication Symposium
Recent Submissions
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Machine Issues Associated with Solid Freeform Fabrication
(1992)Before we begin a discussion of machine issues it is important that we categorize exactly what we mean. There are differences between the design of a research piece of equipment as compared to a commercial piece of ... -
Rapid Prototyping Using FDM: A Fast, ,Precise, Safe Technology
(1992)This paper outlines the use of FDM to speed product design and to streamline the manufacturing process. Time compression, the ability to quickly reduce the time it takes to get new products to market, has increased ... -
Adaptive Laminated Machining for Prototyping of Dies and Molds
(1992)Adaptive laminated machining is the fusion of slicing a solid model into layers and producing parts by CNC milling machines. Unlike other solid freeform fabrication processes which create the part by addition of material, ... -
Rapid Prototyping Using 3-D Welding
(1992)Rapid prototyping systems are based, almost exclusively on polymer, or paper materials. The dimensions of the parts produced are limited by the volume of the processing area within the machine, and parts tend to warp or ... -
Manufacturing Mechatronics Using Thermal Spray Shape Deposition
(1992)A new technology for manufacturing mechatronics is described. The technique is based on recursive masking and deposition of thermally sprayed materials. Using these methods, mechanical structures can be created that embed ... -
Generating Topological Informa*ion from a "Bucket of Facets"
(1992)The STL de facto data exchange standard for Solid Freefonn F*brication represents CAD models as a collection of unordered triangular planar facels. No topological connectivity information is provided; hence the term ... -
Rapid Prototyping at Zero Gravity for In-Flight Repairs and Fabrication on Space Station Freedom
(1992)The ability to perform in-flight rapid prototyping would be of great benefit to NASA in two ways. First, repair parts could be fabricated from CAD designs beamed up from earth based laboratories which might allow a failed ... -
Relating Operating Parameters between SLS Machines which have Different Scanner Geometries and Laser Spot Sizes
(1992)As the number of SLS machines in operation increases, the opportunities to share operating parameters with other SLS operators also increases. However, if the machines are not identical down to the spot size of the laser ... -
The Materials Advantage of the SLS Selective Laser Sintering Process
(1992)The rapid prototyping market continues to progress in tenns of processes and materials used for the creation of conceptual and functional parts and prototype tooling. As this market continues to mature, the market leaders ... -
Fundamentals of Stereolithography
(1992)It has only been a little over four years since the introduction of the first StereoLithography system, the SLA-1. From early 1988 until J.une 1992 over 300 SLA-1, SLA-250, SLA-190 and SLA-500 units have been sold by ... -
Laser Tracking Control Implementation for SFF Applications
(1992)From a three-dimensional computer graphic model, Solid Freeform Fabrication produces solid objects directly without special tooling and human handling. In order to increas process productivity and accuracy, a time-efficient ... -
A Case Study in Rapid Prototyping
(1992)Since the first quarter of 1988, Pratt & Whitney (P&W), a Division of United Technologies Corporation (UTC), has been involved in the development for the use of rapid prototyping technologies that use a "layer-by-Iayer" ... -
Preliminary Experience witb Selective Laser Sintigrapbic (SLS) Models of tbe Human Temporal Bone
(1992)To assess the accuracy of three-dimensional models of the human temporal bone generated from computed tomographic (CT) data. -
A Method to Generate Exact Contour Files for Solid Freeform Fabrication
(1992)Existing methods to create contour files generate a polygonal approximation of the contours instead of an exact representation. This paper presents a method to generate exact contours from Constructive Solid Geometry ... -
Automatic CAD-model Repair: Shell-Closure
(1992)Shell-closure is critical to the repair of CAD-models described in the .STL file-format, the de facto solid freeform fabrication industry-standard. Polyhedral CAD-models that do not exhibit shell-closure, i.e. have cracks, ...
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