scholarly journals Teaching Mechanism Design Using Constraint Based Design Tools In A Cad System

2020 ◽  
Author(s):  
Laurence J. Logue
2016 ◽  
Vol 4 (2) ◽  
pp. 64-69
Author(s):  
Овчаренко ◽  
O. Ovcharenko

In speaking of modern higher education, we mean an educational system that allows young specialists to fit into the labour market. Such specialists need to be equipped with the necessary knowledge and skills not only to perform work on the project, but also to attack the problem creatively. The task of higher school is to provide the necessary set of knowledge and skills that will allow young specialists to work successfully and to be on the march. The language of communication of engineers is drawings. Computer drawings allow reducing the working time considerably in the development, production, remediation, transfer, and retention. Therefore, the ability to use drawing program for working with images is necessary. Despite all the powerful design tools and visualization, a key moment in computer design is the documentation of the product and its design in accordance with accepted standards that is considered to be an integral part of the design process. After the successful development of a 2D environment, the expert can confidently move on to 3D modeling that facilitates the receipt of drawings and models at times and gives you the opportunity to inspect the settings of the virtual model and, if necessary, to improve them significantly. Usage of different CAD-systems for communication engineers- partners is a reality. Therefore it is very useful for a specialist to be able to use different programs. Modern graphic programs (AutoCAD, SolidEdge) have many similar opportunities, but they also have some differences. Knowledge of several drawing programs is necessary and reduces the amount of time for the skills development for usage of each CAD-system is the problem of the future engineer. The article compares two different programs and the possibility of using the both CAD-systems for working with drawings.


Author(s):  
A Mohole ◽  
P Wright ◽  
C Séquin

A key element in the overall efficiency of a manufacturing enterprise is the compatibility between the features that have been created in a newly designed part, and the capabilities of the downstream manufacturing processes. With this in mind, a process-aware computer aided design (CAD) system called WebCAD has been developed. The system restricts the freedom of the designer in such a way that the designed parts can be manufactured on a three-axis computer numerical control milling machine. This paper discusses the vision of WebCAD and explains the rationale for its development in comparison with commercial CAD/CAM (computer aided design/manufacture) systems. The paper then goes on to describe the implementation issues that enforce the manufacturability rules. Finally, certain design tools are described that aid a user during the design process. Some examples are given of the parts designed and manufactured with WebCAD.


2010 ◽  
Vol 18 (4) ◽  
pp. 311-324 ◽  
Author(s):  
Víctor Hugo Torres ◽  
José Ríos ◽  
Antonio Vizán ◽  
Jesús M. Pérez

2012 ◽  
Author(s):  
V. H. Torres ◽  
J. Ríos ◽  
A. Vizán ◽  
J. M. Pérez

2021 ◽  
Vol 143 (8) ◽  
Author(s):  
Jared Butler ◽  
Jacob Greenwood ◽  
Larry L. Howell ◽  
Spencer Magleby

Abstract We present a resource for designing bistable developable mechanisms (BDMs) that reach their second stable positions while exterior or interior to a cylindrical surface. Analysis of the necessary conditions to create extramobile and intramobile cylindrical BDMs is conducted through a series of three tests. These tests contain elements of both existing and new mechanism design tools, including a novel graphical method for identifying stable positions of linkages using a single dominant torsional spring, called the principle of reflection. These tests are applied to all possible mechanism cases and configurations to identify why certain configurations will always, sometimes, or never be a BDM. Two tables summarize these results as a guide when designing extramobile and intramobile BDMs. The results are compared and demonstrated with a numerical simulation of 30,000+ mechanisms, including several example mechanisms that illustrate the concepts discussed in the work. Discussion is then provided on the implication of these results.


2011 ◽  
Vol 493-494 ◽  
pp. 594-598
Author(s):  
G. Akgungor ◽  
Y. Olcer ◽  
D. Şen ◽  
B. Tunçelli

The occlusal design of dental restorations should stay in harmonic relation to the remaining dentition. In CAD/CAM dentistry, the occlusion is generated by the CAD software based on standard morphologies from the dental database. An automated adaptation process of this standard morphology to an individual clinical situation is difficult and leading to manual adaptation of the proposal with design tools. The new biogeneric software of the chairside CAD/CAD system (CEREC) automatically collects optic measurement of the preparation side including mesial and distal neighbor teeth and antagonist teeth to design a restoration with a patient specific occlusal morphology. This clinical report demonstrated a case, which was treated with ceramic onlay designed and milled with CEREC system used in biogeneric design mode. Digital impression of the preparation was taken with the intraoral camera. Buccal scan,technique was used for taking the occlusal record. Preparation and antagonist images were automatically correlated by software and a virtual articulator was created. After trimming the virtual model, preparation margins were outlined with the automatic margin finder option of the software and then the insertion axis of the restoration was determined. The biogeneric restoration proposal was then automatically seated to the virtual model and desired changes were performed with the design tools of the software. The restoration was milled from feldspathic ceramic block.


1987 ◽  
Vol 31 (11) ◽  
pp. 1241-1242
Author(s):  
Jerome J. Congleton ◽  
Doug Gondella

Of primary concern to the Army is the compliance of crew workstations to Manprint so as to enhance operator comfort and safety in the performance of the specified tasks. This paper discusses the methodology and design tools utilized to provide Crew Seats for the Army Tank - Turreted Air Defense Weapon System. In particular, the use of the Cad System - Ideas for generating anthropometric models for the 5th percentile male lightly clothed and the 95th percentile male in arctic clothing from MIL-HDBK-759A and the design constraints on MIL-STD-1472C will be reviewed. Potential environmental factors affecting safety and human performance, potential areas of concern regarding entry and egress, potential areas of concern regarding workspace, and the Turreted Weapon System seat requirements will be discussed.


2005 ◽  
Author(s):  
John K. Hawley ◽  
John F. Lockett ◽  
Laurel E. Allender

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