Browsing 1998 International Solid Freeform Fabrication Symposium by Title
Now showing items 44-63 of 85
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Parametric Based Controller for Rapid Prototyping Applications
(1998)A methodology aiming at reproducing in Rapid Prototyping applications, exact parametric curves from CAD data is presented. The approach consists of converting the space-based parametric curves from the CAD system into ... -
Powder Deposition and Sintering for a Two-Powder Approach to Solid Freeform Fabrication
(1998)A two-powder approach is presented where Fused Deposition modeling (FDM) is used to create a thin shell in the shape of the part to be fabricated. The shell is filled with powder of the part material and surrounded by a ... -
Preparation and Properties of In-Situ Devices Using the SALD and SALDVI Techniques
(1998)One of the many advantages of Selective Area Laser Deposition (SALD) and Selective Area Laser Deposition Vapor Infiltration (SALDVI) is that they can be used to embed in-situ micro-sensors within macro-components. A ... -
Process Control of 3D Welding as a Droplet-Based Rapid Prototyping Technique
(1998)Three-dimensional welding is investigated as a rapid prototyping technique for the production of real Inetallic parts using gas metal arc welding principles. A high speed machine vision system is used to study the ... -
Process Planning and Automation for Additive-Subtractive Solid Freeform Fabrication
(1998)New additive-subtractive processes promise to enhance SFF capability from prototyping to true low-volume production. However, to maintain the same degree of process automation as in currently available processes like SLA ... -
A Process Planning Method and Data Format for Achieving Tolerances in Stereolithography
(1998)When building parts in a stereolithography apparatus (SLA), the user is faced with many decis!ons regarding the setting of process variables. To 'achieve a set of tolera~ces as closely as pOSSIble, relationships between ... -
Processing of Bioceramic Implants Via Fused Deposition Process
(1998)Porous ceramic structures have long been a subject of investigation as bone sl..bstitute. Most of these porous structures are typically made by techniques that result .randomly arranged pores with a wide variety of pore ... -
Processing of Titanium Net Shapes by SLS/HIP
(1998)SLS/HIP is a hybrid direct laser fabrication method that combines the strengths of selective laser sintering (SLS) and hot isostatic pressing (HIP). SLS can produce complex shaped metal components with an integral, gas ... -
Properties of a High Temperature Liquid Crystal Stereolithography Resin
(1998)A liquid crystal monomer has been developed that contains both acrylate and acetylene reactive groups. The curing behavior and mechanical properties ofthe polymers formed from this monomer have been characterized in this ... -
Prototyping Large-Sized Objects Using Freeform Thick Layers of Plastic Foam
(1998)Current Rapid Prototyping systems are primarily aimed at small-sized objects containing many shape details. In this paper a Rapid Prototyping technology is presented that is aimed at largesized objects having a complex, ... -
Rapid Freezing Prototyping with Water
(1998)Rapid Freezing Prototyping (RFP) with water is a novel solid freeform fabrication technique that can generate three-dimensional ice objects by depositing and rapidly freezing water layer by layer. The support where ... -
Rapid Prototyping Based on 2D Photographic Images
(1998)Generally it is difficult to get a 3D model from its 2D images. However, if the object is symmetric and its photograph is taken in appropriate perspective, then it is possible to extract pertinent 3D information from its ... -
Rapid Prototyping of Functional Three-Dimensional Microsolenoids and Electromagnets by High-Pressure Laser Chemical Vapor Deposition
(1998)Three-dimensional laser chemical vapor deposition (3D-LCVD) is an emerging process which bridges the gap between various macro-scale rapid prototyping (RP) systems and microfabrication technologies. With the ability to ... -
Rapid Prototyping of Titanium Nitride Using Three-Dimensional Laser Chemical Vapor Deposition
(1998)Selective vapor deposition o/titanium nitride was realizedfrom titanium tetrakis-dimethylamide, Ti(N(CH3)2)4, at pressures up to 138 mbar. High-aspect-ratio needles up to mm long were grown at axial rates up to 10 pm/so ... -
Rapid Steel Tooling Via Solid Freeform Fabrication
(1998)With increasing part complexity and requirements for long production runs, tooling has become an expensive process that requires long lead times to manufacture. This lengthens the amount oftime from "art to part". Rapid ... -
Real Time Video Microscopy for the Fused Deposition Method
(1998)Fused deposition is a layered manufacturing technology, which is being investigated for fabrication of functional parts. Defects and voids in the build process affect the quality andlevel of accuracy of components. These ... -
Recent Developments in Robocasting of Ceramics and Multimaterial Deposition
(1998)Robocasting is a freeform fabrication technique for dense ceramics and composites that is based on layer-wise deposition of highly loaded colloidalslurries. The process is essentially binderless with less than 1% organics ... -
Reducing the Surface Deviation of Streolithographpy Using an Alternative Build Strategy
(1998)Considerable research has been undertaken to assess the suitability of different post-process finishing techniques, when used to reduce the surface deviation of Stereolithography components. Such techniques are however ... -
Reverse Engineering of Polymeric Solid Models Using Refractive Index Matching (RIM)
(1998)Reverse engineering (RE) techniques allows the creation of 3-D CAD files from a solid model. The benefits of reverse engineering are not >new. to the industrial design and manufacturing<arena though wide spread applications ... -
Reverse Engineering Trimmed NURB Surfaces From Laser Scanned Data
(1998)A common reverse engineering problem is to convert several hundred thousand points collected from the surface of an object via a digitizing process, into a coherent geometric model that is easily transferred to a CAD ...
