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Journal ArticleDOI: 10.1177/09544062211012711

Dynamics of part motion on a linear vibratory feeder

07 Jun 2021-pp 095440622110127
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 ...

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Citations
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Journal ArticleDOI: 10.1016/J.MECHMACHTHEORY.2021.104479
Abstract: Component feeding is an important process in assembly and packaging lines, affecting the throughput. It is therefore important to optimize the feeding process with the aim of reducing the takt time of the production line. In kitting lines, the feeding devices are typically used to create little groups of components, preparing the batches for final grouping into a kit. In the paper, 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. Then, an optimization method is proposed based on the dynamic model using a weighted cost function, which allows to define the shape of the blade according to a set of design objectives.

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Topics: Takt time (51%), Throughput (business) (50%)

1 Citations


Open accessProceedings ArticleDOI: 10.5220/0009816402940304
10 Jul 2020-
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.

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Topics: Trap (computing) (55%), Genetic algorithm (51%)

1 Citations


Open accessProceedings ArticleDOI: 10.1063/5.0072623
25 Oct 2021-
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.

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References
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Open accessBook
01 Jan 1991-
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

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Topics: Design for assembly (62%)

347 Citations


Journal ArticleDOI: 10.1177/0954406215597713
Nicholas Turner1, Bill Goodwine1, Mihir Sen1Institutions (1)
01 Aug 2016-
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...

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110 Citations


Journal ArticleDOI: 10.1016/S0278-6125(97)88461-0
Gary P. Maul1, M. Brian Thomas1Institutions (1)
Abstract: Vibratory bowl feeders are the most versatile and widely used parts feeders in automated assembly. This work develops a mathematical model of a bowl feeder by using state-space methods to evaluate bowl feeder parameters. From the mathematical method, a computer simulation can predict the velocity of the parts in the bowl and subsequently the part feed rate. The simulation might be used to improve the design of vibratory bowl feeders.

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67 Citations


Journal ArticleDOI: 10.1016/S0045-7949(96)00223-4
G.H. Lim1Institutions (1)
Abstract: This paper presents the dynamic analysis of a vibratory feeder, which is frequently used to convey small engineering parts. A theoretical analysis of vibratory feeding on a track vibrating with simple harmonic motion and incorporating the possible states of body motion is presented. The 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. The model incorporates various system and operating parameters of the vibratory feeder that could affect the conveying velocity of the moving body. It is shown that the conveying velocity of the body is particularly sensitive to variations in the coefficient of friction and the inclination angle of the track to the horizontal, for a particular set of operating parameters. Reasonably good agreement has been found between the experimentally measured mean conveying velocity and that predicted by the model.

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46 Citations


Journal ArticleDOI: 10.1080/10867651.2004.10504896
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.

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43 Citations


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