Laser-Chemical 3-D Micromachining

1992 ◽  
Vol 282 ◽  
Author(s):  
T. M. Bloomstein ◽  
D. J. Ehrlich
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Solid Modeling ◽  
Compression Molding ◽  
Removal Rates ◽  
Computer Aided Manufacturing ◽  
Electrodischarge Machining ◽  
Computer Aided ◽  
Manufacturing Software ◽  
Aided Design

ABSTRACTThree-dimensional parts are machined in silicon using laser-induced chlorine etching reactions. Structures are created directly from solid-modeling computer-aided-design/computer-aided-manufacturing software. Removal rates exceeding 2×104 and 105μm3/s, several orders of magnitude faster than electrodischarge machining methods, are achieved at 1-μm, and 15-μm x-y resolution, respectively. Laser-induced metallization of resulting structures as well as replication through compression molding have been demonstrated.

SphinxCAM: Computer-Aided Manufacturing for Spherical Mechanisms

1998 ◽  
Author(s):  
John S. Ketchel ◽  
Pierre M. Larochelle
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Aided Manufacturing ◽  
Cad Tools ◽  
Spherical Mechanisms ◽  
Software Packages ◽  
Computer Aided ◽  
Manufacturing Software ◽  
Aided Design

Abstract In this paper we present SphinxCAM, a computer-aided manufacturing software for spherical four-bar mechanisms. The kinematics of spherical mechanisms are reviewed as they pertain to their manufacture. This is followed by a brief review of some of the current computer-aided design (CAD) software for spherical four-bar mechanisms, e.g. Sphinx, SphinxPC, and Isis. These software packages provide the three-dimensional visualization and computational capabilities necessary to design spherical four-bar mechanisms. However, to date no tools exist to aid in the manufacture of spherical mechanisms. SphinxCAM, when used with the CAD tools mentioned above, facilitates the design, visualization, and manufacture of spherical four-bar mechanisms.

A New Proposal for Three-Dimensional Positioning of the Chin Using a Single Computer-Aided Design/Computer-Aided Manufacturing Surgical Guide

2018 ◽  
Vol 29 (7) ◽  
pp. 1963-1964 ◽  
Author(s):  
Pedro Jorge Cavalcante Costa ◽  
Maurício Silva Demétrio ◽  
Pedro Thalles Bernardo Carvalho Nogueira ◽  
Larissa Raposo Rodrigues ◽  
Paulo Domingos Ribeiro Júnior
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Aided Manufacturing ◽  
Surgical Guide ◽  
Computer Aided ◽  
Aided Design

Computer-Aided Design/Computer-Aided Manufacturing Milling of Allogeneic Blocks Following Three-Dimensional Maxillofacial Graft Planning

2019 ◽  
Vol 30 (5) ◽  
pp. e413-e415 ◽  
Author(s):  
Ivan Onone Gialain ◽  
Otavio Henrique Pinhata-Baptista ◽  
Marcelo Gusmão Paraíso Cavalcanti ◽  
Arthur Rodriguez Gonzalez Cortes
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Aided Design

Computer-Aided Modeling and Manufacturing of Spherical Mechanisms via a Novel Web Tool

2007 ◽  
Vol 7 (4) ◽  
pp. 339-346 ◽  
Author(s):  
J. Schuler ◽  
J. Ketchel ◽  
P. Larochelle
Keyword(s):  
Dynamic Simulation ◽  
Computer Aided Design ◽  
Geometric Modeling ◽  
Three Dimensional ◽  
Software Tool ◽  
Web Based ◽  
Spherical Mechanisms ◽  
Computer Aided ◽  
Manufacturing Software ◽  
Aided Design

In this paper, we present a novel web-based computer-aided modeling and manufacturing software tool for spherical mechanisms. Our purpose is to facilitate the analysis, dynamic simulation, and manufacture of one degree of freedom spherical four-bar mechanisms. First, a brief review of some of the current computer-aided design software for spherical four-bar mechanisms is presented. These software packages provide the three-dimensional visualization and computational capabilities necessary to synthesize and analyze spherical four-bar mechanisms. However, to date, no readily available and effective tools exist to aid in the modeling and manufacture of spherical mechanisms. Next, the kinematics of spherical four-bar mechanisms are reviewed as they pertain to their geometric modeling and manufacture. Finally, we present our web-based implementation of a computer-aided modeling, simulation, and manufacturing methodology for spherical four-bar mechanisms called SFBDESIGNER (for spherical four-bar designer). SFBDESIGNER facilitates the design, dynamic simulation, prototyping, and manufacture of spherical four-bar mechanisms.

scholarly journals Generation of tooth profile for Roots rotor based on virtual linkage associated with Assur group

2016 ◽  
Vol 8 (12) ◽  
pp. 168781401668335 ◽  
Author(s):  
Yingjie Cai ◽  
Ligang Yao ◽  
Guowu Wei
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Tooth Profile ◽  
Rotor Profile ◽  
Computer Aided ◽  
Linkage Method ◽  
Assur Group ◽  
Manufacturing Software ◽  
Rotor Tooth ◽  
Aided Design

This article, for the first time, presents the generation of Roots rotor tooth profiles based on an Assur-group-associated virtual linkage method. Taking the original Roots rotor as an example, structure and geometry of the Roots rotor are introduced, and based on the principle of inversion, an equivalent virtual linkage is identified for generating dedendum tooth profile of the rotor. Using linkage decomposition associated with elemental Assur groups, algorithm for computing the tooth curve is constructed leading to the explicit expression of rotor profile and the corresponding numerical simulation, verifying the validity of the proposed approach. For demonstration purpose, the virtual linkage method is then extended to the generation of tooth profiles for the variants of Roots rotors with arc-cycloidal curves and arc-involute curves. Integrated with computer-aided design, computer-aided engineering and computer-aided manufacturing software platforms, as well as the three-dimensional printing technology, this article provides an efficient and intuitive approach for Roots rotor system design, analysis and development.

Degradation of Computer-aided Design/Computer-aided Manufacturing Composites by Dietary Solvents: An Optical Three-dimensional Surface Analysis

2020 ◽  
Vol 45 (4) ◽  
pp. E176-E184
Author(s):  
SM Munusamy ◽  
AU Yap ◽  
HL Ching ◽  
NA Yahya
Keyword(s):  
Lactic Acid ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Distilled Water ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Air Control ◽  
Dimensional Surface

Clinical Relevance Computer-aided design/computer-aided manufacturing (CAD/CAM) composite resins are susceptible to degradation by dietary solvents. Dietary counselling is prudent when placing such CAD/CAM restorations. SUMMARY This study determined the effect of dietary solvents on the surface roughness (Ra) of direct, indirect, and computer-aided design/computer-aided manufacturing (CAD/CAM) dental composites. The materials evaluated were a direct composite (Filtek Z350 XT [FZ]), an indirect composite (Shofu Ceramage [CM]), and four CAD/CAM composites (Lava Ultimate [LU], Shofu Block HC [HC], Cerasmart [CS], and Vita Enamic [VE]). Specimens (12×14×1.5 mm) of each material were prepared, measured for baseline Ra, ranked, divided into six groups (n=12), and conditioned in the following media for 1 week at 37°C: air (control), distilled water, 0.02 N citric acid, 0.02 N lactic acid, heptane, and 50% ethanol-water solution. The composite specimens were then subjected to postconditioning Ra testing using an optical three-dimensional surface analyzer (G4e, Alicona Imaging GmbH, Raaba, Austria). Inter-medium and inter-material comparisons were performed with one-way analysis of variance and post hoc Bonferroni test at a significance level of α=0.05. Mean Ra values ranged from 0.086 ± 0.004 μm to 0.153 ± 0.005 μm for the various material/medium combinations. For all materials, conditioning in air (control) and distilled water generally resulted in significantly lower mean Ra than exposure to other dietary solvents. Conditioning in citric acid presented the roughest surfaces for FZ, CM, and CS. For LU, HC, and VE, exposure to lactic acid, heptane, and ethanol solution resulted in the highest mean Ra. Regardless of conditioning media, FZ had the highest and VE the lowest mean Ra compared with other composites. The CAD/CAM composites remained susceptible to surface degradation by dietary solvents despite their industrial polymerization.

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