Flexible parts feeding for flexible assembly

Edmondson, N.F.; Redford, A. H.

doi:10.1080/00207540110038487

Cited by 17 publications

(10 citation statements)

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“…Other manufacturing processes require the handling of cylindrical and quasi-cylindrical parts, e.g., the pharmaceutical industry has to convey cylindrical pills and phials. Cylindrical parts are processed by classical conveyors, if their axes of rotation form a small angle with the direction of conveying [12]. When this condition is not satisfied, they begin to roll down the track.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Cylindrical Parts for Vibratory Conveying

Comand

Doria

2020

Applied Sciences

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Vibratory conveyors are widely used to feed raw materials and small parts to processing equipment. Up to now, most of the research has focused on materials and parts that can be modeled as point masses or small blocks. This paper focuses on the conveying of cylindrical parts. In this case, the rolling motion is an essential feature of conveyor dynamics. First, the dynamic equations governing the rolling motion are stated, and the effects of friction and rolling resistance coefficients on the behavior of the system are analyzed. Then, a non-linear numerical model is developed in MATLAB. It takes into account the transition between pure rolling and rolling with sliding and the impacts of the cylindrical part on the edges of the conveyor. Numerical results showing the effect of the operative parameters of the conveyor and of friction properties on the traveled distance are presented and discussed. Finally, a comparison between numerical and experimental results is presented.

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Section: Introductionmentioning

confidence: 99%

Dynamics of Cylindrical Parts for Vibratory Conveying

Comand

Doria

2020

Applied Sciences

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“…Redford (1991) also suggested that the materials handling function should be performed using two systems; flexible small parts feeders for pieceparts (Edmondson and Redford 2001f) and a pallet system for all other handling operations due to the commonality and frequency of material handling motions into and out of the assembly system.…”

Section: Materials Handling Systemmentioning

confidence: 99%

Simulation of a generic flexible assembly system

Edmondson¹,

Redford²

2003

International Journal of Computer Integrated Manufacturing

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During the early 1980s, the concept of a flexible assembly machine was first suggested by Hounsfield (1983). Following this, a variety of research projects have been conducted in an attempt to develop a flexible assembly system that is functional and economically viable. The most significant contribution has been made by the EURICA EU 321 ± FAMOS ± INFACT 1 project. However, despite the developments made during these projects, no industrial based system exists today. This paper presents a simulation model of a novel concept for a multi-station flexible automatic assembly machine, and examines the application of a rule based control strategy for the control of a materials handling system used in such a system.

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“…Improvements in generic, fast and easy to setup feeding technologies would greatly benefit the commercial feasibility of small-batch automation. As demonstrated by both Hoffmann et al 36 and Edmonson et al, 37 feeding is an active research topic, and solutions such as bin-picking are becoming commercially available.…”

Section: Robot Programmingmentioning

confidence: 99%

Modelling reversible execution of robotic assembly

Laursen¹,

Ellekilde²,

Schultz³

2018

Robotica

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SUMMARYProgramming robotic assembly for industrial small-batch production is challenging; hence, it is vital to increase robustness and reduce development effort in order to achieve flexible robotic automation. A human who has made an assembly error will often simply undo the process until the error is undone and then restart the assembly. Conceptually, robots could do the same. This paper introduces a programming model that enables robot assembly programs to be executed in reverse. We investigate the challenges in running robot programs backwards and present a classification of reversibility characteristics. We demonstrate how temporarily switching the direction of program execution can be an efficient error recovery mechanism. Moreover, we demonstrate additional benefits arising from supporting reversibility in an assembly language, such as increased code reuse and automatically derived disassembly sequences. As a default approach to reversibility, we use program inversion and statement-level inversion of commands, but with a novel override option providing alternative sequences for asymmetric reverse actions. To efficiently program for this model, this paper introduces a new domain-specific language, SCP-RASQ (Simple C++ Reversible Assembly SeQuences). In initial experiments, where 200 consecutive assemblies of two industrial cases were performed, 18 of 22 errors were corrected automatically using only the trial-and-error capabilities that come from reverse execution.

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Flexible parts feeding for flexible assembly

Cited by 17 publications

References 0 publications

Dynamics of Cylindrical Parts for Vibratory Conveying

Dynamics of Cylindrical Parts for Vibratory Conveying

Simulation of a generic flexible assembly system

Modelling reversible execution of robotic assembly

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