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Journal ArticleDOI

Dynamics of part motion on a linear vibratory feeder

07 Jun 2021-pp 095440622110127
TL;DR: In this article, the conveying surface or track is modelled by a bilinear model and the motion of a part on a curved surface mounted upon a linear vibratory feeder is analyzed.
Abstract: The motion of a part on a curved surface mounted upon a linear vibratory feeder is of great importance in mass production. In this article, the conveying surface or track is modelled by a bilinear ...
Citations
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Journal ArticleDOI
TL;DR: A dynamic model is developed and validated, which describes the interaction of the components to be fed with the blades of a rotating feeding unit and an optimization method is proposed using a weighted cost function, which allows to define the shape of the blade according to a set of design objectives.

3 citations

Journal ArticleDOI
TL;DR: In this paper , a CFD-DEM model for aerated vibratory convection was developed to explore the coupled gas-solid interactions governing bulk powder bed dynamics, and four candidate particle sizes representative of typical powder beds.

3 citations

Proceedings ArticleDOI
25 Oct 2021
TL;DR: In this paper, a balanced feeder with wiper blades was developed and optimized to maximize the conveying velocity with no part clogging, but the design was based on linear feeders.
Abstract: Linear vibratory feeders and vibratory bowl feeders are widely used as part feeders in mass production industries. Making the helical track of the bowl feeder requires special tooling. This makes it expensive to adapt to product changes. Linear feeders are simpler in construction and relatively flexible enough to accommodate a variety of products. This paper provides an alternate design to vibratory bowl feeders. A balanced feeder experimental setup with wiper blades was developed and optimized to maximize the conveying velocity with no part clogging.

1 citations

Proceedings ArticleDOI
10 Jul 2020
TL;DR: A Self-Adaptive Genetic Algorithm based learning strategy that uses dynamic simulation to validate feeder designs that learns a free-form design needing little prior domain knowledge from the designer.
Abstract: The task of feeding parts into a manufacturing system is still extensively handled using classical vibratory bowl feeders. However, the task of designing these feeders is complex and largely handled by experience and trialand-error. This paper proposes a Self-Adaptive Genetic Algorithm based learning strategy that uses dynamic simulation to validate feeder designs. Compared to previous approaches of ensuring parts are oriented to a desired orientation by both deciding on a set of suitable mechanisms and then optimizing them to the specific part, this strategy learns a free-form design needing little prior domain knowledge from the designer. This novel approach to feeder design is validated on two different parts and it creates designs of hills and valley that reorients the parts to a single orientation. The found designs are validated both in simulation and with real-world experiments and achieve high success rates for reorienting the parts.

1 citations

Journal ArticleDOI
TL;DR: In this article , a mathematical model was developed that can predict the trend in conveying velocity in linear vibratory feeder in three distinct regimes, sliding, hopping and a combination of these two.
Abstract: Linear vibratory feeder is one of the most extensively used part feeding systems in a production line. The part motion on the feeder can be sliding or hopping or a combination of these two. Based on the dynamics of part motion this paper identifies three distinct regimes. A mathematical model was developed that can predict the trend in conveying velocity in these regimes. This model can provide the parts position as a function of time and has considered relative displacement between the part and the conveying surface. The simulation was validated by performing experiments for a range of vibration frequencies and amplitudes.
References
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Book
01 Jan 1991
TL;DR: In this paper, the authors present a detailed analysis of high-speed automatic insertion and insertion of parts for high speed feeding and orienting of a Vibratory-Bowl feeder.
Abstract: INTRODUCTION Historical Development of the Assembly Process Choice of Assembly Method Social Effects of Automation References AUTOMATIC ASSEMBLY TRANSFER SYSTEMS Continuous Transfer Intermittent Transfer Indexing Mechanisms Operator-Paced Free-Transfer Machine References AUTOMATIC FEEDING AND ORIENTING - VIBRATORY FEEDERS Mechanics of Vibratory Conveying Effect of Frequency Effect of Track Acceleration Effect of Vibration Angle Effect of Track Angle Effect of Coefficient of Friction Estimating the Mean Conveying Velocity Load Sensitivity Solutions to Load Sensitivity Spiral Elevators Balanced Feeders Orientation of Parts Typical Orienting System Effect of Active Orienting Devices on Feed Rate Analysis of Orienting Systems Performance of an Orienting Device Natural Resting Aspects of Parts for Automatic Handling Analysis of a Typical Orienting System Out-of-Bowl Tooling References AUTOMATIC FEEDING AND ORIENTING - MECHANICAL FEEDERS Reciprocating-Tube Hopper Feeder Centerboard Hopper Feeder Reciprocating-Fork Hopper Feeder External Gate Hopper Feeder Rotary-Disk Feeder Centrifugal Hopper Feeder Stationary-Hook Hopper Feeder Bladed-Wheel Hopper Feeder Tumbling-Barrel Hopper Feeder Rotary-Centerboard Hopper Feeder Magnetic-Disk Feeder Elevating Hopper Feeder Magnetic Elevating Hopper Feeder Magazines References FEED TRACKS, ESCAPEMENTS, PARTS-PLACEMENT MECHANISMS, AND ROBOTS Gravity Feed Tracks Powered Feed Tracks Escapements Parts-Placing Mechanisms Assembly Robots References PERFORMANCE AND ECONOMICS OF ASSEMBLY SYSTEMS Indexing Machines Free-Transfer Machines Basis for Economic Comparisons of Automation Equipment Comparison of Indexing and Free-Transfer Machines Economics of Robot Assembly References DESIGN FOR MANUAL ASSEMBLY Introduction Where Design for Assembly Fits in the Design Process General Design Guidelines for Manual Assembly Development of a Systematic DFA Analysis Method DFA Index Classification System for Manual Handling Classification System for Manual Insertion and Fastening Effect of Part Symmetry on Handling Time Effect of Part Thickness and Size on Handling Time Effect of Weight on Handling Time Parts Requiring Two Hands for Manipulation Effects of Combinations of Factors Threaded Fasteners Effects of Holding Down Problems with Manual Assembly Time Standards Application of the DFA Method Further General Design Guidelines References PRODUCT DESIGN FOR HIGH-SPEED AUTOMATIC ASSEMBLY AND ROBOT ASSEMBLY Introduction Design of Parts for High-Speed Feeding and Orienting Example Additional Feeding Difficulties High-Speed Automatic Insertion Example Analysis of an Assembly General Rules for Product Design for Automation Design of Parts for Feeding and Orienting Summary of Design Rules for High-Speed Automatic Assembly Product Design for Robot Assembly References PRINTED-CIRCUIT-BOARD ASSEMBLY Introduction Terminology Assembly Process for PCBs SMD Technology Estimation of PCB Assembly Costs Worksheet and Database for PCB Assembly Cost Analysis PCB Assembly - Equations and Data for Total Operation Cost Glossary of Terms References FEASIBILITY STUDY FOR ASSEMBLY AUTOMATION Machine Design Factors to Reduce Machine Downtime Due to Defective Parts Feasibility Study References Problems Appendix A: Simple Method for the Determination of the Coefficient of Dynamic Friction The Method Analysis Precision of the Method Discussion Reference Appendix B: Out-of-Phase Vibratory Conveyors Out-of-Phase Conveying Practical Applications Reference Appendix C: Laboratory Experiments Performance of a Vibratory-Bowl Feeder Performance of a Horizontal-Delivery Gravity Feed Track Conclusions Appendix D: Feeding and Orienting Techniques for Small Parts Coding System Feeding and Orienting Techniques Orienting Devices for Vibratory-Bowl Feeders Nonvibratory Feeders Nomenclature Index

368 citations

Journal ArticleDOI
01 Aug 2016
TL;DR: An overview of current research in origami applied to mechanical engineering can be found in this article, with a background on key mat-mat concepts and definitions commonly used in the field.
Abstract: This is an overview of current research in origami applied to mechanical engineering. Fundamental concepts and definitions commonly used in origami are introduced, including a background on key mat...

146 citations

Journal ArticleDOI
TL;DR: In this paper, a mathematical model of a bowl feeder was developed by using state-space methods to evaluate bowl-feeder parameters, and a computer simulation can predict the velocity of the parts in the bowl and subsequently the part feed rate.

70 citations

Journal ArticleDOI
TL;DR: In this paper, a theoretical analysis of vibratory feeding on a track vibrating with simple harmonic motion and incorporating the possible states of body motion is presented, where states of motion cover both the contact and non-contact states, and each state of motion is considered separately when determining the equations of motion.

53 citations

Journal ArticleDOI
TL;DR: This work considers intersections between rays and the simplest parametric surface, the bilinear patch, and presents a complete, efficient, robust, and graceful formulation to solve ray-bilinearpatch intersections quickly.
Abstract: Ray tracing and other techniques employ algorithms which require the intersection between a three-dimensional parametric ray and an object to be computed. The object to intersect is typically a sphere, triangle, or polygon but many surface types are possible. In this work we consider intersections between rays and the simplest parametric surface, the bilinear patch. Unlike other surfaces, solving the ray-bilinear patch intersection with simple algebraic manipulations fails. We present a complete, efficient, robust, and graceful formulation to solve ray-bilinear patch intersections quickly. Source code is available online.

48 citations