scholarly journals Automated Methods in Computer Aided Design

1999 ◽  
Author(s):  
K. Abdel-Malek ◽  
H.-L. Zou ◽  
J.-Y. Wang ◽  
S. Othman
Keyword(s):  
Variational Method ◽  
Concurrent Engineering ◽  
Computer Aided Design ◽  
3D Models ◽  
Design Change ◽  
Mechanical Parts ◽  
Computer Aided ◽  
Aided Design ◽  
2D And 3D ◽  
Automated Methods

Abstract A numerical variational method is herein introduced for the automatic redesign of mechanical parts subject to a design change. This method is demonstrated to the design of mechanical parts in the context of concurrent engineering of 3D parts. Relations between dimensions in a mechanical part as dictated by a designer are modeled using mechanisms and their kinematic relations. Variational cut-joint constraints are introduced, kinematic joints in the formulation are combined, and a Jacobian is determined. Constraint violations are then compensated to compute an assembled mechanism, hence redesigning the part. It is shown that this formulation is broadly applicable to 2D and 3D models. The method and algorithm are illustrated through examples.

scholarly journals Monitoring Alveolar Ridge Remodelling Post-Extraction Using Sequential Intraoral Scanning over a Period of Four Months

2020 ◽  
Vol 17 (18) ◽  
pp. 6638
Author(s):  
Khaled E. Ahmed
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Dimensional Changes ◽  
Intraoral Scanning ◽  
Computer Aided ◽  
Potential Applications ◽  
Cad Cam ◽  
Aided Design ◽  
2D And 3D

The potential applications of computer-aided design/computer-aided manufacturing (CAD/CAM) and intraoral scanning exceed the delivery of standard prosthodontic interventions. The aim of this study was to clinically present a developed assessment technique, that relies on the use of sequential intraoral scanning, three-dimensional superimposition, and 2D and 3D deviation analyses based on a standardised protocol, as an auxiliary tool in monitoring dimensional changes of residual ridge post-extraction with a follow-up period of four months.

scholarly journals Initial Experience Using 3-Dimensional Printed Models for Head and Neck Reconstruction in Haiti

2020 ◽  
pp. 014556132093892
Author(s):  
Swar Vimawala ◽  
Terry Gao ◽  
Jared Goldfarb ◽  
Dominick Gadaleta ◽  
Bon Ku ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
3D Models ◽  
Anatomic Reconstruction ◽  
Head And Neck Reconstruction ◽  
3 Dimensional ◽  
Resource Limited ◽  
Patient Consent ◽  
Computer Aided ◽  
Aided Design ◽  
Complex Surgery

This report describes the first use of a novel workflow for in-house computer-aided design (CAD) for application in a resource-limited surgical outreach setting. Preoperative computed tomography imaging obtained locally in Haiti was used to produce rapid-prototyped 3-dimensional (3D) mandibular models for 2 patients with large ameloblastomas. Models were used for patient consent, surgical education, and surgical planning. Computer-aided design and 3D models have the potential to significantly aid the process of complex surgery in the outreach setting by aiding in surgical consent and education, in addition to expected surgical applications of improved anatomic reconstruction.

scholarly journals Method of Patternmaking in Fashion Institution and Fashion Industry

2019 ◽  
Vol 9 (2) ◽  
pp. 5400-5405
Keyword(s):  
Higher Education ◽  
Computer Aided Design ◽  
Higher Education Institutions ◽  
Fashion Industry ◽  
Skilled Workers ◽  
Computer Aided ◽  
Aided Design ◽  
2D And 3D ◽  
3D Applications ◽  
Flat Pattern

There are many approaches and procedures that can be used to create patternmaking in higher education institutions and the fashion industry. Literature demonstrates that there are several methods that essentially generate patterns such as draping, flat patterns and Computer Aided Design (CAD) that include 2D and 3D applications. Many Malaysian institutions are studying patternmaking using flat pattern and draping [4], which is different from the fashion industry using CAD software. In order to produce skilled workers in the field of patternmaking, they must learn and apply the pattern-making techniques and methods well so that they do not have any problems when it comes to working in the industry or the education sector. This study describes the basic method, process and CAD software that can be used in the field of patternmaking.

Development of a CAD-CAM Interaction System to Generate a Flexible Machining Process Plan

2015 ◽  
Vol 9 (2) ◽  
pp. 104-114 ◽  
Author(s):  
Mohammad Mi’radj Isnaini ◽  
◽  
Yusaku Shinoki ◽  
Ryuta Sato ◽  
Keiichi Shirase
Keyword(s):  
Computer Aided Design ◽  
3D Models ◽  
Raw Material ◽  
Machining Process ◽  
Machining Time ◽  
Process Plan ◽  
Process Plans ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

A unique machining knowledge has led to several different perspectives between planners and operators as regards in designing a machining process plan. All precedents have shown the need to maintain a suitable machining process plan. Commercial Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) systems have facilitated the manipulation of 3D models to generate a machining process plan. The open Advanced Programming Interfaces (APIs) are also helpful in tailoring decision support systems to determine process plans. This study proposes an emergent system to generate flexible machining process plans. The proposed system considers the integration between design and manufacturing perspective to produce relevant machining process plan. The generation of process plans begins by considering the total removal volume of the raw material, estimating the removal features, thus analyzing and ordering several candidates of machining process plans. The total machining time and number of setups from each machining process plan candidate is analyzed and evaluated. Eventually, the proposed system is tested using several prismatic 3D models of a workpiece to show the outcomes.

Identifying, Correcting, and Avoiding Errors in Computer-Aided Design Models Which Affect Interoperability

2001 ◽  
Vol 1 (2) ◽  
pp. 156-166 ◽  
Author(s):  
Hong Gu ◽  
Thomas R. Chase ◽  
Douglas C. Cheney ◽  
Thomas “Tim” Bailey ◽  
Douglas Johnson
Keyword(s):  
Concurrent Engineering ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Model Quality ◽  
Inconsistent System ◽  
Interoperability Testing ◽  
Computer Aided ◽  
Cad Models ◽  
Aided Design

Interoperability characterizes the ability of computer-aided design (CAD) models to accurately represent objects in concurrent engineering environments. The diagnostic set of available software for interoperability testing is described. This set is utilized to develop a visual catalog of possible interoperability errors. The value of utilizing interoperability testing software is appraised by way of a real-world case study. Numerous significant errors are identified in a suite of 140 parts. “Geometry errors” are shown to be more common than “topology errors.” The case study suggests that sensitizing the designer to the nature of typical errors leads to improvement in initial model quality. Example errors are described to illustrate their nature and how to eliminate them. Informal guidelines to improve quality upon initial design are deduced. The development of errors due to inconsistent system accuracy settings during data exchange is explored.

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