Browsing 1999 International Solid Freeform Fabrication Symposium by Issue Date
Now showing items 1-20 of 47
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Si/SiC-Ceramtc Prototypes via LS2 1 -Process (Liquid Silicon Infiltration of Laser Sintered C-SiC Parts)
(1998)The liquid silicon infiltration of laser sinteredC-~iC parts (LS2 I) is solidfreeform fabrication technique which allows the production of complexshapedSi/SiC prototypes. A mixture of SiC powder and reactive polymer ... -
An Interactive Virtual System for Simulation and Optimization of Rapid Prototyping
(1999)The paper describes the development of a computer system for simulation and optimization of rapid prototyping (RP) processes. The system provides a test-bed for virtual prototyping by integrating product design and RP ... -
Computer-Aided Process Planningforaotomatic generation of3D digitizing process for laser sensors
(1999)This paper introduces some results of a research work carried out on the automation of digitization process ofcomplex parts using a precision 3D-laser sensor. It will be presented a new way to scan automatically a complex ... -
Process Planning Based on User Preferences
(1999)Typical approaches to adaptive slicing in previous literature have typically used surface finish requirements to control the slicing process. As a result, slice schemes improve the part's surface quality, but do not ... -
A Methodology to Create STL Files from Data Point Clouds Generated with a Coordinate Measuring Machine
(1999)Industries have always had the need to reproduce objects especially when drawings are no longer or were never available (reverse engineering). Coordinate measurement machines, whether touch- or laser-based, enable users ... -
Knowledge-based system for choice of rapid prototyping process
(1999)This paper introduces a knowledge-based system for the choice of rapid product development processes. Rapid product development processes are not limited to layer-manufacturing machines, but they also integrate CAD ... -
Precision LCVD System Design with Real Time Process Control
(1999)A Laser Chemical Vapor Deposition (LCVD) system was designed using a fixed 100 Watt C02 laser focused on a moveable substrate. Temperature and height measurement devices monitor the reaction at the point of deposition ... -
Volume Modeling for Rapid Prototyping
(1999)The expanding workspace of Rapid Prototyping will draw on the new developments in geometric modeling. Volume modeling has substantial advantages over other modeling schemes to meet the emerging requirements of Rapid ... -
Functionally Gradient Material Design and Modeling Using Hypertexture for Solid Freeform Fabrication
(1999)SFF technologies have the potential to become manufacturing process that are capable of producing parts that have not been feasible by other techniques. The fabrication of Functionally Gradient Material (FGM) is one of ... -
Representation and design of heterogeneous components
(1999)Recent advances in rapid prototyping techniques enable the fabrication of components whose composition can be controlled and varied in any desired fashion. This presents design engineers with the opportunity and the ... -
Slicing STEP-based CAD Models for CAD/RP Interface
(1999)SFF technologies have an ability of creating a physical part directly .•. from its computer model by. adding material on a layer by layer basis. One of the problems lies in their current file fonnat for CAD data exchange. ... -
Residual Stresses in Layered ·Manufacturing
(1999)Layered Manufacturing processes accumulate residual stresses during materialbuildup. These stresses may cause part warping and layer delamination. This paper presents work done on investigating residual stress accumulation ... -
Selective Laser Sintering of Stainless Steel 314S HC Processed Using Room Temperature Powder Beds
(1999)Metal powder bed pre-heating is a proposed route for the homogenisation of temperature gradients that can otherwise cause individual layer warping and cracking in direct metal Selective Laser Sintering (SLS). However, ... -
A MathematicalDescription of Layered Manufacturing Fabrication
(1999)This study is attempted to use a mathematical definition to describe the principles of Layer Manufacturing Processing. The concept of model decoll1Position (layered subtraction for 3D model slicing) and material accumulation ... -
An Ejection Mechanism Design Method for AIM Tools
(1999)One of the key advantages of AIM tooling is time savings when producing small batch production quality parts. However, designing suitable ejection mechanisms is becoming a bottleneck. There are two goals of this paper. ... -
Processing, Characterization and Modeling of Non-Random Porous Ceramic Structures
(1999)Processing of non-random porous ceramic structures via fused deposition process is discussed. structures are characterized experimentally and statistically based on their compressive strength. Finite element modeling is ... -
Cryogenic Mechanical Alloying of Poly (ether ether ketone) - Polycarbonate Composite Powders for Selective Laser Sintering
(1999)Mechanical alloying is a solid state processing technique traditionally used in the metallurgical industry to extend solubility limits in alloy systems. Mechanical alloying can also be used to blend polymer systems at ... -
Maximizing the Strength of Fused-Deposition ABS Plastic Parts
(1999)Fused-Deposition (FD) creates parts using robotic extrusion of set.D.i-liquid .polymer fiber, which molecularly bonds with neighboring fibers via thermal-dlffuslo.n bonding. T~e strength ofthe. part depends on the bulk ... -
Extrusion Freeform Fabrication of Functional Ceramic PrototypeS
(1999)Extrusion Freeforming (EFF) and Fused Deposition Modeling (FDM) processes are established freeforming techniques capable of fabricating complex shaped ceramic prototypes by the sequential deposition and solidification ... -
Measurement of the Sintering Dynamics of polymeric powders at Near SLS Conditions
(1999)The sintering dynamics of materials used in the Selective Laser Sintering process impact greatly the thermal conditions of the powder bed. An experimental setup was developed to obtain sintering rate information at ...
