英文原文:
Design for Modularity: Product Design for Decomposition and Integration
ABSTRACT
In the last few years, corporation has engaged in studies to improve their design process, ranging from marketing to support. Recent government, academic and industrial ctor initiatives have sought advance technologies for developing and managing product development environment. Many companies have established a concurrent design process for their product development and have recognized a need for tools in evaluating the level of decomposition and integration, while analyzing the impact on the final design. This article will propo a three-pha methodology for design of products while considering modularity, asmbly and manufacture.
KEYWORDS
Modularity, Group technology, Optimization, Decomposition, Classification
1. Introduction
Modular design is a design technique that can be ud to develop complex products using similar components . Components ud in a modular product must have features that enable them to be coupled together to form a complex product. Modular design can be also viewed as the process of producing units that perform discrete functions, and then the units are connected together to provide a variety of functions. Modular design emphasizes the minimization of interactions between components, which will enable components to be designed and produced independently from each other. Each component, designed for modularity, is suppod to support one or more function. When components are structured together, to form a product, they will support a larger or general function. This shows the importance of analyzing the product function and decom
posing it into sub-functions that can be satisfied by different functional modules. Modularity can be applied in the product design, design problems, production systems, or all three. It is preferable to u the modular design in all three types at the same time.
Modular products refer to products that fulfill various overall functions through the combination of distinct building blocks or modules. In the n that the overall function, performed by the product, can be divided into sub functions that can be implemented by different modules or components. An important aspect of modular products is the creation of a basic core unit to which different elements (modules) can be fitted, thus enabling a variety of versions of the same module to be produced. The core should have sufficient capacity to cope with all expected variations in performance and usage.
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t design problems can be broken down into a t of easy电影的英文
to manage simpler sub-problems. Sometimes complex problems are reduced into easier sub-problems, where a small change in the solution of one sub-problem can lead to a change in other sub-problems’ solutions. This means that the decomposition has resulted in functionally depe
ndent sub-problems. Modularity focus on decomposing the overall problem into functionally independent sub-problems, in which interaction or interdependence between sub-problems is minimized. Thus, a change in the solution of one problem may lead to a minor modification in other problems, or it may have no effect on other sub-problems.
Modularity in production systems aims at building production systems from standardized modular machines. The fact that a wide diversity of production requirements exists has led to the introduction of a variety of production machinery, and a lack of agreement on what the building blocks should be. This means that there are no standards for modular machinery. In order to build a modular production system, production machinery must be classified into functional groups from which a lection of a modular production system can be made to respond to different production requirements. Rogers classified production machinery into four basic groups of “primitive” production elements. The are process machine primitives, motion units, modular fixtures, and configurable control units. It is argued that if a lection is made from the four categories, it will be possible to build a diver range of efficient, automated and integrated production system.
2．Overview of Product Development
Product development is a necessary and important part of the activities performed by a manufacturing firm. Due to changes in manufacturing technology, consumer preferences, and government regulations (to name a few influences), existing products will become less profitable over time. The sales volume of a typical product starts slowly,名富
accelerates, becomes flat, and then steadily declines. Although there may be a few products that remain profitable for many years, firms continually develop new products that will generate more profits. Product development determines what the firm will manufacture and ll. That is, it attempts to design products that customers will buy and to design manufacturing process that meet customer demand profitably. Poor decisions during product development lead to products that no one wants to buy and products that are expensive to manufacture in sufficient quantity.
