scholarly journals Computing Axes of Rotation for Setup Planning Using Visibility of Polyhedral Computer-Aided Design Models

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Ye Li ◽  
Matthew C. Frank
Keyword(s):  
Computer Aided Design ◽  
Feature Detection ◽  
Complex Geometry ◽  
Setup Planning ◽  
Polyhedral Model ◽  
Design Models ◽  
Axis Of Rotation ◽  
Computer Aided ◽  
Aided Design ◽  
Part Model

This paper presents a method for determining feasible axes of rotation for setup planning, based on the visibility of a polyhedral model. The intent of this work was to develop a feature-free approach to setup planning, with the specific focus on multi-axis machine setups. Visibility mapping can provide a quantitative evaluation of a surface, a feature or an entire part model; however, the next step is to use this information for process planning. In this paper, we present an approach of using a visibility map to evaluate axes of rotation that could be used in an indexer-type setup on a machine tool. Instead of using expensive and complicated multi-axis machining, it may be feasible to machine using multiple three-axis toolpaths if a single axis of rotation can be used to rotate the part through the minimum set of orientations. An algorithm is presented that is capable of processing visibility information from a polyhedral model; hence, the method is generic and does not require feature detection. As such, the work is applicable to a variety of applications; in particular for subtractive rapid prototyping where complex geometry may not contain recognizable features.

scholarly journals The Influence of Exposure Energy Density on Porosity and Microhardness of the SLM Additive Manufactured Elements

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2304 ◽  
Author(s):  
Janusz Kluczyński ◽  
Lucjan Śnieżek ◽  
Krzysztof Grzelak ◽  
Janusz Mierzyński
Keyword(s):  
Computer Aided Design ◽  
Complex Geometry ◽  
Final Analysis ◽  
Machine Building ◽  
Layer By Layer ◽  
Laser Melting ◽  
Measurement Results ◽  
Computer Aided ◽  
Exposure Energy ◽  
Aided Design

Selective laser melting (SLM) is an additive manufacturing technique. It allows elements with very complex geometry to be produced using metallic powders. A geometry of manufacturing elements is based only on 3D computer-aided design (CAD) data. The metal powder is melted selectively layer by layer using an ytterbium laser. This paper contains the results of porosity and microhardness analysis made on specimens manufactured during a specially prepared process. Final analysis helped to discover connections between changing hatching distance, exposure speed and porosity. There were no significant differences in microhardness and porosity measurement results in the planes perpendicular and parallel to the machine building platform surface.

scholarly journals Automated Mesh Deformation for Computer-Aided Design Models That Exhibit Boundary Topology Changes

AIAA Journal ◽  
2020 ◽  
Vol 58 (9) ◽  
pp. 4128-4141
Author(s):  
Liang Sun ◽  
Weigang Yao ◽  
Trevor T. Robinson ◽  
Cecil G. Armstrong ◽  
Simão P. Marques
Keyword(s):  
Computer Aided Design ◽  
Mesh Deformation ◽  
Design Models ◽  
Topology Changes ◽  
Computer Aided ◽  
Aided Design

A Method for Automatic Generation of Parametric Computer Aided Design Models in a Mold Base e-Catalog System

2006 ◽  
Vol 6 (3) ◽  
pp. 308-314 ◽  
Author(s):  
Duhwan Mun ◽  
Heungki Kim ◽  
Kwangsub Jang ◽  
Junmyun Cho ◽  
Junhwan Kim ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Parametric Method ◽  
Automatic Generation ◽  
Configuration Design ◽  
Design Models ◽  
Cad System ◽  
Computer Aided ◽  
Cad Models ◽  
Parametric Cad ◽  
Aided Design

Reusing existing design models and utilizing an e-Catalog for components are required for faster product development. For the acceleration, an e-Catalog should provide parametric computer aided design (CAD) models, since parametric information is necessary for configuration design. There are difficulties, however, in building a parametric library of all the necessary combinations using a CAD system, because there are too many component combinations for each product. To overcome this problem, we propose a table parametric method to generate parametric CAD models automatically, and describe its details.

scholarly journals Accuracy of computer-aided design models of the jaws produced using ultra-low MDCT doses and ASIR and MBIR

2018 ◽  
Vol 13 (11) ◽  
pp. 1853-1860
Author(s):  
Asma’a A. Al-Ekrish ◽  
Sara A. Alfadda ◽  
Wadea Ameen ◽  
Romed Hörmann ◽  
Wolfgang Puelacher ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Design Models ◽  
Computer Aided ◽  
Aided Design
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