Performance of an Orienting Device Employed in Vibratory Bowl Feeders

1970 ◽  
Vol 92 (3) ◽  
pp. 694-698 ◽  
Author(s):  
G. Boothroyd ◽  
L. E. Murch
Keyword(s):  
Statistical Analysis ◽  
Experimental Tests ◽  
Trial And Error ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Percent Efficiency

A statistical analysis of the performance of a vee cutout orienting device used in a vibratory bowl feeder is presented. The results of experimental tests are described and compared with the analysis. From the information thus obtained it is possible to design and build such a device without the need for trial and error procedures and to obtain 100 percent efficiency.

Vibratory Feeding

1967 ◽  
Vol 182 (1) ◽  
pp. 135-152 ◽  
Author(s):  
A. H. Redford ◽  
G. Boothroyd
Keyword(s):  
Phase Difference ◽  
Experimental Tests ◽  
Harmonic Motion ◽  
Fundamental Limitations ◽  
Wide Range ◽  
Theoretical Predictions ◽  
The Coefficient Of Friction ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Vibratory Feeding

A brief review of previous work on the mechanics of vibratory conveying is presented followed by a new theoretical analysis of vibratory feeding on a track which vibrates with simple harmonic motion and where a phase difference may exist between the parallel and normal components of the track motion. For a wide range of practical conditions, the theoretical predictions are found to agree closely with the results of experimental tests. These show that certain fundamental limitations exist in the performance of conventional feeder drives where the two components of track motion are in-phase. From further theoretical and experimental work, it is shown that under conditions where the appropriate phase difference exists between the two components of track motion, many practical advantages over conventional vibratory feeding are obtained. With a new design of vibratory bowl feeder drive based on the results of the work, significantly higher conveying velocities may be obtained under stable feeding conditions and, further, these high conveying velocities are virtually independent of the coefficient of friction between the component and the track. The results of the present work apply equally to the design of spiral elevators and in-line vibratory feeders.

A Gas Diluter for Measuring Nanometer-Sized Particles in Oxygen or Hydrogen

1998 ◽  
Vol 41 (4) ◽  
pp. 17-23
Author(s):  
Wayne McDermott
Keyword(s):  
Laminar Flow ◽  
Turbulent Mixing ◽  
Particle Concentration ◽  
Molecular Diffusion ◽  
Experimental Tests ◽  
Inert Gas ◽  
Contaminant Particle ◽  
Reactive Gases ◽  
Percent Efficiency ◽  
Reactive Gas

A laminar flow diluter tube was designed and tested. The tube dilutes reactive gas aerosols in nitrogen using molecular diffusion. No turbulent mixing of the gases occurs in the tube. The gases are diluted without substantially changing the particle concentration of the sample. The diluted gas can then be measured using an inert gas particle counter. A numerical model predicted the molecular diffusion and particle transport behavior of the tube. Experimental tests confirmed the predictions. The tube diluted sample hydrogen to a concentration of 6.5 percent and oxygen to a concentration of 17 percent. The same tube transported particles smaller than 10 nm with greater than 78 percent efficiency. Therefore, the diluter can be used with particle counters designed for nanometer-size sensitivity. The laminar flow diluter can be used to measure contaminant particle concentrations in filtered reactive gases. Such filtered gases are typically used in microcircuit fabrication.

NEW ALTERNATIVES TO THE VIBRATORY BOWL FEEDER

1991 ◽  
Vol 11 (4) ◽  
pp. 14-16
Author(s):  
Anna Kochan
Keyword(s):  
Bowl Feeder ◽  
Vibratory Bowl Feeder

scholarly journals Statistical Analysis of Root Count Data

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 907A-907
Author(s):  
D. Michael Glenn
Keyword(s):  
Statistical Analysis ◽  
Analysis Of Variance ◽  
Power Law ◽  
Count Data ◽  
Root Systems ◽  
Trial And Error ◽  
Taylor’S Power Law ◽  
First Approximation ◽  
Taylor's Power Law ◽  
The Mean

The minirhizotron approach for studying the dynamics of root systems is gaining acceptance; however, problems have arisen in the analysis of data. The purposes of this study were to determine if analysis of variance (ANOVA) was appropriate for root count data, and to evaluate transformation procedures to utilize ANOVA. In peach, apple, and strawberry root count data, the variance of treatment means was positively correlated with the mean, violating assumptions of ANOVA. A transformation based on Taylor's power law as a first approximation, followed by a trial and error approach, developed transformations that reduced the correlation of variance and mean.

scholarly journals A well-trained artificial neural network for predicting the rheological behavior of MWCNT–Al2O3 (30–70%)/oil SAE40 hybrid nanofluid

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hemmat Esfe ◽  
S. Ali Eftekhari ◽  
Maboud Hekmatifar ◽  
Davood Toghraie
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Experimental Tests ◽  
Hybrid Nanofluid ◽  
Trial And Error ◽  
Shear Rates ◽  
Artificial Neural ◽  
Artificial Neural Network Ann ◽  
Hidden Layer ◽  
Increasing Temperature

AbstractIn this study, the influence of different volume fractions ($$\phi$$ ϕ ) of nanoparticles and temperatures on the dynamic viscosity ($$\mu_{nf}$$ μ nf ) of MWCNT–Al2O3 (30–70%)/oil SAE40 hybrid nanofluid was examined by ANN. For this reason, the $$\mu_{nf}$$ μ nf was derived for 203 various experiments through a series of experimental tests, including a combination of 7 different $$\phi$$ ϕ , 6 various temperatures, and 5 shear rates. These data were then used to train an artificial neural network (ANN) to generalize results in the predefined ranges for two input parameters. For this reason, a feed-forward perceptron ANN with two inputs (T and $$\phi$$ ϕ ) and one output ($$\mu_{nf}$$ μ nf ) was used. The best topology of the ANN was determined by trial and error, and a two-layer with 10 neurons in the hidden layer with the tansig function had the best performance. A well-trained ANN is created using the trainbr algorithm and showed an MSE value of 4.3e−3 along 0.999 as a correlation coefficient for predicting $$\mu_{nf}$$ μ nf . The results show that an increase $$\phi$$ ϕ has a significant effect on $$\mu_{nf}$$ μ nf value. As $$\phi$$ ϕ increases, the viscosity of this nanofluid increases at all temperatures. On the other hand, with increasing temperature, the viscosity of this nanofluid decreases. Based on all of the diagrams presented for the trained ANNs, we can conclude that a well-trained ANN can be used as an approximating function for predicting the $$\mu_{nf}$$ μ nf .

Experimental Study of the Behavior of Certain Connectors in a Vibratory Bowl Feeder

1997 ◽  
Author(s):  
Lourdes M. Rosario ◽  
José D. Hernández-Coronas
Keyword(s):  
Computer Aided Design ◽  
Vibration Amplitude ◽  
Mass Properties ◽  
Series Of Experiments ◽  
Feeder Design ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Aided Design ◽  
Near Future ◽  
Complex Parts

Abstract The design and implementation of vibratory bowl feeders involves the analysis of the behavior of the parts as they are conveyed up the bowl track. This paper presents the results obtained in a series of experiments which study the effect of the vibration amplitude in the feeder on the dynamic orientations of a family of parts. The objective of the study is to investigate how complex parts behave in a vibratory bowl feeder and try to establish a relationship between the orientation of the parts and the vibration amplitude of the bowl feeder. The study consisted of experimenting with four types of connectors that were similar in shape but differ in proportions. By experimenting with a part family, we intend to establish and generalize in the near future a relationship between the tendency of the parts to fall in certain orientations, the amplitude of vibration in the feeder, and geometric features or mass properties. The acquired knowledge could then be incorporated in computer aided design programs, together with existing theory on feeder design, to specify orientation devices and operating parameters in the vibratory bowl feeder.

Approximation to the dynamics of transported parts in a vibratory bowl feeder

2009 ◽  
Vol 44 (12) ◽  
pp. 2217-2235 ◽  
Author(s):  
J.A. Vilán Vilán ◽  
A. Segade Robleda ◽  
P.J. García Nieto ◽  
C. Casqueiro Placer
Keyword(s):  
Bowl Feeder ◽  
Vibratory Bowl Feeder

Design and Study on the Automatic Extrusion Device for Curved Chassis of Vibratory Feeder

2012 ◽  
Vol 198-199 ◽  
pp. 1298-1301
Author(s):  
Liang Han ◽  
Jia Li ◽  
Lei Xiang Zhang
Keyword(s):  
Hydraulic System ◽  
Experimental Studies ◽  
Control Unit ◽  
Control Technology ◽  
Proportional Control ◽  
Vibratory Feeder ◽  
Potential Benefits ◽  
Bowl Feeder ◽  
Vibratory Bowl Feeder ◽  
Micro Control Unit

Vibratory feeder is a device which is used to arrange small workpieces in neat rows and convey them from one place to another by vibratory feeding. It has been playing a key role in automation production. According to manufacturing equipments for the chassis of vibratory bowl feeder, this paper makes studies mainly in the followings: (1) introduces the principle of the vibratory feeder briefly, (2) the mechanical structure of the automatic extrusion device for curved chassis of vibratory feeder is designed, including frame, moulds and guiding mechanism, (3) static analysis, mould stress analysis are done by using the finite software ANSYS, (4) based on the electro-hydraulic proportional control technology, a hydraulic system is designed, (5) a control system based on STC89C52RC MCU(Micro Control Unit) is given. The problems of automatic extrusion for the curved chassis of vibratory feeder are successfully solved through the theoretical and experimental studies, which achieves the expected design goals and fills in a gap in this field in China, which brings great economic and social potential benefits and has wide application prospect.

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