A predictive–reactive approach for the sequencing of assembly operations in an automated assembly line

2022 ◽  
Vol 73 ◽  
pp. 102201
Author(s):  
Massimo Manzini ◽  
Erik Demeulemeester ◽  
Marcello Urgo
Keyword(s):  
Assembly Line ◽  
Automated Assembly ◽  
Assembly Operations

Effects of Non-Geometric Features and Incentive Schemes on Manual Assembly of System Variants: An Experimental Study

2007 ◽  
Author(s):  
Ramaprasad E. Lakshminarayana ◽  
Shun Takai
Keyword(s):  
Assembly Line ◽  
Mixed Model ◽  
Cognitive Effects ◽  
Automated Assembly ◽  
Design Guideline ◽  
Manual Assembly ◽  
Incentive Schemes ◽  
Assembly Operations ◽  
Mixed Model Assembly

Although numerous firms have been shifting toward automated assembly, most still rely on manual assembly when complex assembly operation is required for large-scaled systems. Furthermore, because firms design variants of a system to satisfy diverse customer needs, they may manufacture these system variants in the same assembly line. This type of operation, called mixed model assembly, may improve the utilization of existing manufacturing facilities; however, it may also increase assembly errors due to interchanging geometrically similar parts between system variants. Design for Assembly (DFA) is a design guideline that assists engineers in designing systems that are easier to assemble. However, because DFA guidelines group geometrically similar parts in the same part category, it may be impossible to distinguish geometrically similar but functionally different parts (modules) used in different systems. This paper proposes experimenting how cognitive effects of non-geometric part features influence the productivity and quality in mixed model assembly operations. Furthermore, because the productivity and quality of manual assembly may be influenced by the motivation of operators, this paper examines how productivity and quality may be influenced by different incentive schemes.

Infact not fiction

1995 ◽  
Vol 15 (1) ◽  
pp. 34-34
Author(s):  
Clive Loughlin
Keyword(s):  
Assembly Line ◽  
New Product ◽  
Assembly System ◽  
Assembly Operation ◽  
Flexible Assembly ◽  
Change Mechanism ◽  
Assembly Operations ◽  
Shuttle System

Examines the development of a flexible assembly machine, GENASYS [Generic Assembly System] which has been designed to produce a range of components. The machine comprises two manipulator arms, a tool changer and a shuttle system for the pallets on which the assembly operations are performed. Each manipulator is able to select a different tool from a carousel tool change mechanism that can accommodate up to 20 different tools. The machine can easily be programmed for a specific assembly operation and low batch numbers can be produced economically. Timescales for the design and installation of the machine are considerably shorter than for a dedicated assembly line and once installed in a factory new product variants can be accommodated within very short timescales and with low‐retooling costs.

Minimizing the cost of products manufactured by the assembly line

2020 ◽  
pp. 483-487
Author(s):  
N.I. Aristova
Keyword(s):  
Computer Modeling ◽  
Assembly Line ◽  
Scientific Research ◽  
The Self ◽  
Manufactured Products ◽  
The Cost ◽  
Assembly Operations ◽  
Automation Tools ◽  
Probabilistic Nature ◽  
Product Assembly

A significant criterion for the functioning of an assembly line is to minimize the cost of manufactured products, for the achievement of which approaches are currently used that apply computer modeling and the hierarchical principle of product assembly, the approach, as well as taking into account the probabilistic nature of the assembly operations. An overview of scientific research aimed at solving these problems is given. An approach has been proposed that makes it possible to assess the efficiency of production in the self-reproduction of automation tools by the criterion of minimizing the cost of manufactured products.

The Factory of the Future? The Contradictory Restructuring of an Assembly Line in France

2020 ◽  
pp. 118-136
Author(s):  
Juan Sebastian Carbonell
Keyword(s):  
Economic Crisis ◽  
Assembly Line ◽  
New Technologies ◽  
Industrie 4.0 ◽  
Labour Process ◽  
The Future ◽  
Factory Of The Future ◽  
Assembly Operations

This paper studies how the introduction of new technologies and a new organiza-tion of work transforms the labour process at an assembly line of the PSA group in France. The firm presents the new organization as an innovative modernization bringing forward the "Factory of the Future" through concepts directly inspired by Industrie 4.0 and Industrie du futur. At the same time, this modernization also re-sponds to the need for the plant to become more competitive in order to face the consequences of the economic crisis of 2008. Drawing from data obtained through fieldwork (interviews with workers, union representatives and internal documents), the author shows that behind the rhetoric of modernization and industrial excel-lence, the firm intensifies work in assembly operations and workers lose autono-my.

A Productivity Improvement of a Cookware Assembly Line

2015 ◽  
Vol 799-800 ◽  
pp. 1398-1402 ◽  
Author(s):  
Jongrak Niamsawan ◽  
Suksan Prombanpong
Keyword(s):  
Cycle Time ◽  
Assembly Line ◽  
Line Balancing ◽  
Productivity Improvement ◽  
Motion Study ◽  
Machine Layout ◽  
Workplace Organization ◽  
Bottle Neck ◽  
Assembly Operations ◽  
Working Method

This research objective is to improve the productivity of cookware assembly line by means of time and distance reductions. The motion study and line balancing techniques were applied to the entire assembly operations. A bottle neck was identified to where the operation with inadequate machine layout and workplace organization, including the unbalanced workloads. The new workplace layout and new working method for operators were designed and implemented as well as balancing the assembly line. Specifically, the conveyor speed and duration between the consecutive workpieces in the production line were adjusted to 0.10 m/s and 50 cm, respectively. The number of operators needed in the process can be reduced from 14 persons to 11 persons. The cycle time for assembling process is decreased from 12 to 5 second.

Evaluation of System Reconfigurability Based on Usable Excess

2014 ◽  
Author(s):  
Jeffrey D. Allen ◽  
Jason D. Watson ◽  
Christopher A. Mattson ◽  
Scott M. Ferguson
Keyword(s):  
Communication Systems ◽  
Assembly Line ◽  
Assembly Lines ◽  
Automated Assembly ◽  
Complex Engineered Systems ◽  
Future Needs ◽  
Key Factor ◽  
Long Time ◽  
Engineered Systems ◽  
Over Time

The challenge of designing complex engineered systems with long service lives can be daunting. As customer needs change over time, such systems must evolve to meet these needs. This paper presents a method for evaluating the reconfigurability of systems to meet future needs. Specifically we show that excess capability is a key factor in evaluating the reconfigurability of a system to a particular need, and that the overall system reconfigurability is a function of the system’s reconfigurability to all future needs combined. There are many examples of complex engineered systems; for example, aircraft, ships, communication systems, spacecraft and automated assembly lines. These systems cost millions of dollars to design and millions to replicate. They often need to stay in service for a long time. However, this is often limited by an inability to adapt to meet future needs. Using an automated assembly line as an example, we show that system reconfigurability can be modeled as a function of usable excess capability.

Design and Control of Genetic Algorithm-Based Multi-Station LED Chip Waxing Machine

2013 ◽  
Vol 805-806 ◽  
pp. 1856-1860
Author(s):  
Xiang Yu Sun ◽  
Ying Chun Zhang ◽  
Zuo Xun Wang ◽  
Tao Hao
Keyword(s):  
Genetic Algorithm ◽  
Assembly Line ◽  
Light Emitting Diode ◽  
Automated Assembly ◽  
Light Emitting ◽  
Single Station ◽  
Line Work ◽  
And Control ◽  
Serial Mode ◽  
Working Efficiency

Based on the existing LED (light emitting diode) chip waxing machine running in single-station serial mode, a multi-station LED chip waxing machine was designed which made creative improvements on the revolving platform of the waxing machine. Working efficiency was greatly increased with multi-station continuous parallel working mode. The control system used genetic algorithm-based PID (proportion integration differentiation) control to precisely control the revolving platform and all the manipulators, so that the waxing machine would carry out the fully automated assembly line work.

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