Computer Aided Design of Classic External Geneva Mechanism

2014 ◽  
Vol 1036 ◽  
pp. 662-667
Author(s):  
Iulian Stǎnǎşel ◽  
Florin Blaga ◽  
Traian Buidoş
Keyword(s):  
Computer Program ◽  
Computer Aided Design ◽  
Input Data ◽  
3D Model ◽  
Calculated Data ◽  
Computer Aided ◽  
Precise Movement ◽  
Measurement Devices ◽  
Aided Design ◽  
Intermittent Motion

Geneva mechanism is used as a mechanism for transforming rotary motion into intermittent motion and is able to achieve a precise movement and its lock, which makes it usable in many areas, particularly in timer devices, measurement devices, feed mechanisms, positioning mechanisms, pick-up and transport machinery, textile machinery etc. The studied literature showed that, although it has long been known, this mechanism is still interesting for contemporary researchers. The present paper proposes a method of synthesis and a computer-aided kinematic and dynamic analysis for this mechanism. Based on input data, it was developed a computer program that computes the dimensions of components of Geneva mechanism and determines velocity acceleration and displacement of Geneva wheel. The dimensional calculated data were also used to obtain 3D model of the mechanism.

scholarly journals Computer Aided Design of Adjustable Thin Film Resistors

1980 ◽  
Vol 7 (1-3) ◽  
pp. 77-81
Author(s):  
Marcel Francois
Keyword(s):  
Thin Film ◽  
Computer Program ◽  
Computer Aided Design ◽  
Input Data ◽  
Film Resistor ◽  
Thin Film Resistor ◽  
Computer Aided ◽  
Thin Film Resistors ◽  
Aided Design

A computer program has been developed, which calculates any adjustable thin film resistor from simple input data (electrical, geometrical, positional, orientational), punched on “input cards”. The “output cards”, which contain the coordinates, are fed to a numerically controlled draughting machine, which produces either an intermediate ink-on-paper drawing or the final cut-and-strip artwork. Our CAD method proceeds in several steps, offering all the permitted solutions and providing for designer's options.

Effect of In-office Bleaching on Color, Translucency, and Whiteness Variations in CAD-CAM Monolithic Materials

2021 ◽  
Author(s):  
RG Fonseca ◽  
RC Peńa ◽  
R Simóes ◽  
AC Ramos ◽  
LN Dovigo
Keyword(s):  
Optical Properties ◽  
Computer Aided Design ◽  
Calculated Data ◽  
Color Difference ◽  
Deionized Water ◽  
Stain Removal ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
The Impact

SUMMARY Little is known about the impact of bleaching on the optical properties of computer-aided design and computer-aided manufactured (CAD-CAM) monolithic materials. The aim of the present study was to evaluate the effect of one session of in-office bleaching on stain removal, staining susceptibility, translucency, and whiteness variations of CADCAM monolithic materials. Disks were fabricated from Lava Ultimate (LU), Vita Enamic (VE), Vita Suprinity (VS), and IPS e.max CAD (IPS). A spectrophotometer was used to register Commission Internationale de l’Eclairage L*a*b* coordinates. For stain removal, 80 specimens from each material were assessed at baseline (R0) and after immersion in deionized water or coffee for 365 days followed or not by bleaching with 40% hydrogen peroxide (R1). For staining susceptibility, 80 specimens from each material were analyzed at baseline (R0’), and after having been bleached or not and immersed in deionized water or coffee (R1’). Both analyses were calculated as the color difference (ΔE00) between R1-R0 and R1’-R0’, respectively. Differences in translucency (ΔTP00) and whiteness (ΔWID) between R1-R0 and R1’-R0’ were also calculated. Data were analyzed by three-way ANOVA and the Games-Howell post hoc test (α=0.05). Clinical significance was based on 50%:50% perceptibility and acceptability thresholds for ΔE00, ΔTP00 and ΔWID, respectively. Surfaces were analyzed by scanning electron microscopy. Coffee increased ΔE00 in LU, VE, and VS, and decreased their translucency and whiteness, whereas the IPS had only its whiteness affected. Bleaching after immersion in coffee decreased ΔE00 in LU and VE, and increased translucency and whiteness of LU, VE, and VS. No effect was observed on IPS. Bleaching before immersion in coffee decreased translucency of LU, but within the acceptable interval, while VE exhibited lower ΔE00, and became more translucent and less dark. Both VS and IPS were not affected. One session of in-office bleaching benefited optical properties of the previously stained LU, VE, and VS, without increasing their susceptibility to staining or adversely providing clinically unacceptable variations in their translucency and whiteness. All variations exhibited by the IPS were below the perceptible threshold.

An Analysis of Drill Geometry for Optimum Drill Design by Computer. Part II—Computer-Aided Design

1970 ◽  
Vol 92 (3) ◽  
pp. 657-666 ◽  
Author(s):  
S. Fujii ◽  
M. F. DeVries ◽  
S. M. Wu
Keyword(s):  
Computer Program ◽  
Computer Aided Design ◽  
Cutting Planes ◽  
Orthogonal Cutting ◽  
Design Parameters ◽  
Twist Drill ◽  
Grinding Parameters ◽  
Computer Aided ◽  
Aided Design ◽  
Drill Design

In Part II, a computer program that aids in the design of a twist drill is described, based on the analysis presented in Part I. A true drill and a “computer-designed” drill having identical design and grinding parameters are compared in orthogonal cutting planes. The effects of the design parameters on drill geometry are investigated utilizing the computer program.

scholarly journals DIGITAL SATELLITE MODEM RECEIVER DESIGNED WITH RUSSIAN-MADE ELECTRONIC COMPONENTS

2020 ◽  
Vol 258 (3) ◽  
pp. 60-64
Author(s):  
E.V. Belov ◽  
E.A. Brusin
Keyword(s):  
Computer Aided Design ◽  
3D Model ◽  
Electronic Components ◽  
Cad System ◽  
Computer Aided ◽  
Aided Design ◽  
Domestic Companies

In this paper we propose the design of the receiving path of an advanced satellite modem. The receiver comprises only the components produced by Russian domestic companies. The parameters of the receiver are discussed in the paper. 3D model of the receiver board obtained using the Altium Designer integrated computer-aided design (CAD) system is also presented.

Computer Aided Design for High Mechanical Efficiency of Wolfrom Type Speed Reducers

1994 ◽  
Author(s):  
Cosmin Orlandea ◽  
Ovidiu Tataru
Keyword(s):  
Computer Program ◽  
Computer Aided Design ◽  
Mechanical Efficiency ◽  
Reduction Ratio ◽  
Transmission Ratio ◽  
Physical Size ◽  
Computer Aided ◽  
Transmission Reduction ◽  
High Torque ◽  
Aided Design

Abstract Wolfrom type planetary speed reducers are complex planetary transmissions, formed of three simple planetary mechanisms that have the same carrier H. The main characteristic of this kind of reducers is the large transmission reduction ratio (usually by a factor of 100 ... 300), obtained with a relatively small sized reducer. Generally, high transmission ratio reducers have the capability to output high torque. Considering the fact that their physical size is small, there are high normal loads between the teeth of the component gears and in the bearings, increasing the internal losses of the system. The object of this paper is to help the designer of this type of speed reducers to find the limits of the transmission ratio corresponding to an acceptable mechanical efficiency and size. We have expressed all the relations as functions of only three variables (z1, a and δ), that best define the integer type of relations involved in this paper. Based on these relations, we have created a computer program to optimize the value of the total mechanical efficiency of the planetary train.

Computer Aided Design of Bucket Type Elevators and Belt Conveyors

1992 ◽  
Author(s):  
Birol Kilkis ◽  
S. Selçuk Sager
Keyword(s):  
Computer Program ◽  
Granular Materials ◽  
Computer Aided Design ◽  
Transportation Systems ◽  
Design Tool ◽  
The Other ◽  
Bulk Materials ◽  
Computer Aided ◽  
Belt Conveyors ◽  
Aided Design

Abstract One of the most effective transportation systems especially for bulk materials is continuous conveyors. They enable to transport materials quickly, economically and with rather simple means of handling. On the other hand for transportation needs involving steep grades and elevations, bucket type elevators are suitable especially for granular materials. In this study a computer program has been developed in order to provide a computer aided design tool for both bucket type elevators and belt conveyors. Operation of the program is interactive. Thus, some critical decisions during the design can be made by the designer, himself. The program has been written in BASIC programming language for Macintosh Plus personal computers. It can be also used in Macintosh II computers. The computer program standardizes all design results and the design conforms the relevant TSE, DIN and ISO standards. All standard tables used in the program, are available in the database. The database can be easily edited and updated. A design report can also be obtained at the end of the design as well as the screen output of the design session.

scholarly journals 3-D simulation of posterior fossa reduction in Chiari I

2016 ◽  
Vol 74 (5) ◽  
pp. 405-408 ◽  
Author(s):  
Yvens Barbosa Fernandes ◽  
Pedro Fábio Mendonça Perestrelo ◽  
Pedro Yoshito Noritomi ◽  
Roger Neves Mathias ◽  
Jorge Vicente Lopes da Silva ◽  
...  
Keyword(s):  
Posterior Fossa ◽  
Computer Aided Design ◽  
3D Model ◽  
Normal Values ◽  
Volumetric Change ◽  
Computer Aided ◽  
Chiari I ◽  
Design Software ◽  
Aided Design

ABSTRACT We proposed a 3D model to evaluate the role of platybasia and clivus length in the development of Chiari I (CI). Using a computer aided design software, two DICOM files of a normal CT scan and MR were used to simulate different clivus lengths (CL) and also different basal angles (BA). The final posterior fossa volume (PFV) was obtained for each variation and the percentage of the volumetric change was acquired with the same method. The initial normal values of CL and BA were 35.65 mm and 112.66º respectively, with a total PFV of 209 ml. Ranging the CL from 34.65 to 29.65 – 24.65 – 19.65, there was a PFV decrease of 0.47% – 1.12% – 1.69%, respectively. Ranging the BA from 122.66º to 127.66º – 142.66º, the PFV decreased 0.69% – 3.23%, respectively. Our model highlights the importance of the basal angle and clivus length to the development of CI.

scholarly journals Optimizing body design of a computer-assisted manual press

2019 ◽  
Vol XXII (2) ◽  
pp. 169-176
Author(s):  
Turof M.
Keyword(s):  
Computer Program ◽  
Computer Aided Design ◽  
Solid Modeling ◽  
Computer Aided Engineering ◽  
Computer Assisted ◽  
Computer Aided ◽  
Complex Program ◽  
Body Design ◽  
Aided Design ◽  
Microsoft Windows

This paper proposes a simplified design of a press body manually using a model consisting of a double symmetrical frame flush. Both Mathcad and Solidworks programs were used to determine the dimensions and drawings. MathCad is a very complex program, but also very useful for engineers, researchers, mathematicians, students, teachers, and all those who use math. Mathcad is a much better way to perform and manage engineering calculations, making them easy to achieve, understand, verify, communicate, and logically follow. SolidWorks is a solid modeling computer-aided design (CAD) and computer-aided engineering (CAE) computer program that runs on Microsoft Windows.

Computer Aided Design of Rotary Screen and its Conveyor for Solid Waste Processing Systems

1997 ◽  
Author(s):  
Bilgin Kaftanoglu ◽  
Okan Alkan
Keyword(s):  
Computer Program ◽  
Simulation Model ◽  
Solid Waste ◽  
Computer Aided Design ◽  
Design Procedure ◽  
Waste Processing ◽  
Computer Aided ◽  
Aided Design ◽  
Program Data ◽  
System Characteristics

Abstract In this study, typical solid waste processing systems are analyzed. Then, a rotary screen and conveyor is designed for composting plants. A computer program is developed for the design procedure. By use of a simulation model included in the program, data are obtained and these are plotted to see system characteristics. These data then, are compared with the previous works.

Sign in / Sign up

Export Citation Format

Share Document