Concurrent design in wire bonding machine

Pao Yue-kong Library Electronic Theses Database

Concurrent design in wire bonding machine

 

Author: Wong, Chiu-fai
Title: Concurrent design in wire bonding machine
Degree: M.Sc.
Year: 1998
Subject: Wire bonding (Electronic packaging)
Concurrent engineering
Design, Industrial
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Manufacturing Engineering
Pages: x, 135 leaves : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1437030
URI: http://theses.lib.polyu.edu.hk/handle/200/972
Abstract: The objective of this dissertation is to develop a methodology tat supports concurrent design in wire bonding machine. In order to support the concurrent design activities, the Hierarchical Decomposition, Design Diagram and Error Budget are identified as the three major issues in this dissertation. 1. A hierarchical decomposition methodology for wire bonding machine is approached. This approach places emphasis on the arrangement of entities in hierarchies and on the hierarchical relationships between entities. The structure is represented in a hierarchical tree form, where a large and complex system is conjunctively or disjunctively broken down into several sub-modules that are linked using And / Or operators. A Hierarchical Concurrent Engineering System (HCES) is formally defined and its properties are discussed. Through the use of hierarchical approach in the design of the wire bonding machine, we found that this approach made the concurrent design more systematical and effective. 2. For concurrent engineering of parametric design, we introduce a graph representation which is called a design diagram to represent parameters and relationships involved in machine design. This design diagram is more effective for depicting the parameters and parameter relationships involved in the design of machine element. Furthermore, design diagrams bridge the representational gap that exists between two-step process and provides a standard procedure for executing step. So, the same diagram can be reused in different situations where the sets of given parameters vary. 3. In order to design to achieve the system accuracy specification, this dissertation also describes the implementation of an error budget that is developed to guide the design process. An error budget is a system analysis tool, used for predicting the total error of a system at the design stage for systems where accuracy is an important measure of performance. Given a system error goal, an error budget can be used in a control mode to set individual subsystem error limits, while also making trade-offs that balance the level of difficulty among the subsystems. It is a valuable design tool for the comparison of alternative layouts of X-Y table and provides a systematic method of predicting the degree of difficulty of achieving the total error target. This method should be used in critical stage in precision machine development programmed.

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