scholarly journals Design for assembly meaning: a framework for designers to design products that support operator cognition during the assembly process

2019 ◽  
Vol 22 (3) ◽  
pp. 615-632 ◽  
Author(s):  
Davy D. Parmentier ◽  
Bram B. Van Acker ◽  
Jan Detand ◽  
Jelle Saldien
Keyword(s):  
Design For Assembly ◽  
Assembly Process

Design for Assembly Evaluation of Orientation Difficulty Features

1992 ◽  
Author(s):  
Robert H. Sturges ◽  
Jui-Te Yang
Keyword(s):  
Geometric Modeling ◽  
Boundary Representation ◽  
Design For Assembly ◽  
Assembly Process ◽  
Assembly Evaluation ◽  
Index Of Difficulty ◽  
Analysis System ◽  
Time Required ◽  
High Level ◽  
Geometric Modeling System

Abstract In support of the effort to bring downstream issues to the attention of the designer as parts take shape, an analysis system is being built to extract certain features relevant to the assembly process, such as the dimension, shape, and symmetry of an object. These features can be applied to a model during the downstream process to evaluate handling and assemblability. In this paper, we will focus on the acquisition phase of the assembly process and employ a Design for Assembly (DFA) evaluation to quantify factors in this process. The capabilities of a non-homogeneous, non-manifold boundary representation geometric modeling system are used with an Index of Difficulty (ID) that represents the dexterity and time required to assemble a product. A series of algorithms based on the high-level abstractions of loop and link are developed to extract features that are difficult to orient, which is one of the DFA criteria. Examples for testing the robustness of the algorithms are given. Problems related to nearly symmetric outlines are also discussed.

scholarly journals A Prototype of Feature-Based Design for Assembly

1990 ◽  
Author(s):  
T. L. DeFazio ◽  
A. C. Edsall ◽  
R. E. Gustavson ◽  
J. A. Hernandez ◽  
P. M. Hutchins ◽  
...  
Keyword(s):  
Information Source ◽  
Design Feature ◽  
Functional System ◽  
Design System ◽  
Prototype System ◽  
Design For Assembly ◽  
Assembly Process ◽  
Feature Based ◽  
Feature Based Design ◽  
Assembly Analysis

Abstract This paper describes a prototype software system that implements a form of feature-based design for assembly. It is not an automated design system but instead a decision and design aid for designers interested in Concurrent Design. Feature-based design captures design intent (assembly topology, product function, manufacturing, or field use) while creating part and product geometry. Design for assembly as used here extends existing ideas about critiquing part shapes and part count to include assembly process planning, assembly sequence generation, assembly fixturing assessments, and assembly process costs. This work was primarily Interested in identifying the information important to DFA tasks, and how that information could be captured using feature-based design. It was not intended to extend the state of the art in feature-based geometry creation, but rather to explore the uses of the information that can be captured. The prototype system has been programmed in LISP on Sun workstations. Its research contributions comprise integration of feature-based design with several existing and new assembly analysis and synthesis algorithms; construction of feature properties to meet the needs of those algorithms; a carefully chosen division of labor between designer and computer; and illustration of feature-based models of products as the information source for assembly analysis and process design. Some of its functions have been implemented approximately or partially but they give the flavor of the benefits to be expected from a fully functional system.

A Coordinated Product and Process Development Environment for Design for Assembly

1996 ◽  
Author(s):  
David E. Lee ◽  
H. Thomas Hahn
Keyword(s):  
Concurrent Engineering ◽  
Process Development ◽  
Low Cost ◽  
Holistic Approach ◽  
Coordination Mechanism ◽  
Design For Assembly ◽  
Assembly Process ◽  
Development Environment ◽  
Industrial Sectors ◽  
Assembly Operations

Abstract The development approach embodied in design for assembly (DFA) has been demonstrated effectively in different industrial sectors and through the design of a multitude of products. However, little effort has been applied to improving development methods for the assembly operations and processes used to fabricate these products. If the benefits of concurrent engineering are to be fully realized, a more holistic approach to unifying a product’s design with development of its assembly processes is needed. This paper provides a description of our approach to establishing an environment for coordinated product and assembly process development. The steps in a product’s development cycle are introduced and the concepts of design for assembly and concurrent engineering defined. Using DFA methods as a motivation, an approach to assembly process development is derived. Referred to as Systematic Assembly Process Development (S-APD), assembly processes are defined and analyzed by using standardized generic assembly operations. To address problems created by using concurrent engineering in product/process development, two mechanisms are described. Since the focus of developing a product (i.e. how well does it perform and cost) differs from developing its assembly processes (i.e. making products at the necessary volumes), the concept of an interface reference context is introduced as a coordination mechanism and applied to development of unmanned composite low-cost aircraft. Moreover, in identifying which elements of the design are to be assembled with a specific set of production technologies, a synchronous thread is instantiated to link product and assembly process development efforts in a temporal context. Different approaches are reviewed to resolve potential conflicts related to concurrency effects generated during simultaneous product and assembly process development.

Optimization Algorithm for Automated Assembly of Circular Parts

2007 ◽  
Vol 10-12 ◽  
pp. 672-676
Author(s):  
Feng Jiang ◽  
Jian Feng Li ◽  
Fang Yi Li
Keyword(s):  
Process Parameters ◽  
Optimization Algorithm ◽  
Design For Assembly ◽  
Assembly Process ◽  
Optimal Process ◽  
Automated Assembly

Design for assembly (DFA) has proved its success in manufacturing to face the market challenge. But the assembly process parameters were rarely concerned in the design for assembly. Aimed at this problem, an algorithm for design for automated assembly of circular parts was proposed. This algorithm can help designer to select the optimal process parameters, such as dimension tolerance of mating parts, location precision of assembly device and so on, subject to budgetary constraints. Finally a case is employed to explain the optimal course.

scholarly journals Usulan Perbaikan Peracangan Produk Smart Light Menggunakan Metode Design for Assembly Boothroyd-Dewhurst

2018 ◽  
Vol 1 (3) ◽  
Author(s):  
Arief Irfan Syah Tjaja ◽  
Rochmat Puji Astomo ◽  
Rispianda
Keyword(s):  
Design For Assembly ◽  
Assembly Process ◽  
Lamp Product ◽  
Design Efficiency ◽  
Street Lighting ◽  
Good Design ◽  
Assembly Time ◽  
Light Product ◽  
Led Lights ◽  
Design Result

ABSTRACTSmart Lamp product is a street lighting product which developed by PT X with LED lights concept. The design of Smart Light product is found to be slightly violate the terms of good design to the assembly process proposed by Boothroyd-Dewhurst as there is a component with sharp side, too much for using fastener, difficult fastener installation because the component is blocked and so forth. Existing design efficiency of Smart Light product is based on a calculation using the Boothroyd-Dewhurst table is 7.63% with total assembly time for 1149.1 seconds while the proposed design efficiency is 15.52% with total assembly time is 539.84 seconds. The changes of the design result reduction of the estimated product cost from Rp1.831.721, - and the BEP in 1482 products on existing product to Rp1.732.609, - and the BEP in 1283 products on proposed product.Kata kunci: design efficiency, assembly time, estimated cost, break event point (BEP).ABSTRAKProduk Smart Light adalah merupakan sebuah produk lampu penerangan jalan yang dikembangkan oleh PT X dengan konsep lampu LED. Rancangan produk Smart Light ini ternyata tidak sedikit melanggar ketentuan-ketentuan perancangan yang baik untuk proses perakitan yang dikemukakan oleh Boothroyd-Dewhurst seperti terdapat komponen yang memiliki bagian yang tajam, penggunaan fastener yang terlalu banyak, pemasangan fastener yang sulit karena komponen terhalang dan sebagainya. Efisiensi desain existing produk Smart Light ini berdasarkan pada perhitungan menggunakan tabel Boothroyd-Dewhurst adalah 7,63% dengan waktu perakitan total selama 1149,1 detik sedangkan efisiensi desain usulan adalah 15,52% dengan waktu perakitan total selama 539,84 detik. Perubahan rancangan desain mengakibatkan pengurangan pada estimasi biaya produk dari Rp1.831.721,- dan break event point (BEP) pada produk ke 1482 untuk produk existing menjadi Rp1.732.609,- dan BEP pada produk ke 1283 untuk produk usulan..Keywords: efisiensi desain, waktu perakitan, estimasi biaya, break event point

Automated Assembly of Arc-Extinguish Chamber for Circuit Breaker Elements

2013 ◽  
Vol 282 ◽  
pp. 197-202
Author(s):  
Marek Vagaš
Keyword(s):  
Short Circuit ◽  
Circuit Breaker ◽  
Electrical Current ◽  
Design For Assembly ◽  
Assembly Process ◽  
Workplace Design ◽  
Automated Assembly ◽  
Metal Part ◽  
Electrical Arc ◽  
Metal Parts

The article discusses about automated workplace design for assembly of arc-extinguish chamber for circuit breaker elements. Arc-extinguish chamber contains of metal part and plastic chamber and serves for extinguishing of electrical arc, which ensue from disconnection of electrical current from electrical circumference (appliance) by overloading or short circuit. Proposed solution automates whole assembly process of arc-extinguish chamber and contains of linear stepper unit, two-axis manipulator and two vibrating trays with automated feeding of metal parts and plastic chambers.

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