Browsing 1998 International Solid Freeform Fabrication Symposium by Title
Now showing items 34-53 of 85
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Laser Polishing of Silica Rods
(1998)Lasers have been widely used in surface modification. In this research a CO2 continuous wave laser has been used to polish the slot surface of the silica rods. The strong absorption of the lO.6 um C02 radiation by the ... -
Machine Design, Control and Performance of Automated Computer-Aided Manufacturing of Laminated Engineering Materials
(1998)This paper describes machine design and control aspects of automating a viable CAM-LEM layered manufacturing process. The cut-then-stack sheet-based approach permits using sheet materials of different thicknesses, enabling ... -
Material Strength in Polymer Shape Deposition Manufacturing
(1998)Shape Deposition Manufacturing (SDM) is a layered manufacturing process involving an iterative combination of material addition and material removal. Polymer SDM processes have used castable thermoset resins to build a ... -
Materials for Biomedical Applications
(1998)This paper discusses two ceramic material systems for selective laser sintering (SLS) that are being developed for biomedical applications for use in repair of bone defects. SLS is the preferred method of fabricating ... -
Materials Issues in Laminated Object Manufacturing of Powder-Based Systems
(1998)Laminated object manufacturing offine ceramic and powder metallurgy components can be carried out using either the cut-then-stack or stack-then-cut motif. With either approach, it is necessary to effect laser cutting to ... -
Measurement and Modeling of Residual Stress-Induced Warping in Direct Metal Deposition Processes
(1998)Tolerance loss due to residual stress-induced warping is a major concern in solid freeform fabrication (SFF) processes. An understanding of how residual stresses develop and how they lead to tolerance loss is a key issue ... -
Mechanical Behavior of Robocast Alumina
(1998)Direct fabrication of alumina parts by robocasting was completed. This method is based on three-dimensional deposition of binderless aqueous alumina slurries. Parts were made with different deposition paths and ... -
Mechanical Characterization of Parts Processed via Fused Deposition
(1998)The possibility of using materials with better physical and mechanical properties together with the quickly improving capabilities of various processes increasingly make Rapid Prototyping (RP) as a new manufacturing ... -
Modeling and Designing Components with Locally Controlled Composition
(1998)SFF processes have demonstrated the ability to produce parts with locally controlled composition. In the limit, processes such as 3D Printing,cancreate parts with composition control on thelength scaleiof 100 ... -
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, ...
