Coding and clustering of design and manufacturing features for concurrent design

1997 ◽  
Vol 34 (1) ◽  
pp. 139-153 ◽  
Author(s):  
D. Xue ◽  
Z. Dong
Keyword(s):  
Concurrent Design ◽  
Design And Manufacturing ◽  
Manufacturing Features

Data Base Requirements for Concurrent Design Systems

1991 ◽  
Author(s):  
Ranko Vujosevic ◽  
Andrew Kusiak
Keyword(s):  
Data Base ◽  
Data Model ◽  
Object Oriented ◽  
Concurrent Design ◽  
Complex Objects ◽  
Maintenance System ◽  
Design And Manufacturing ◽  
Design Systems ◽  
Truth Maintenance ◽  
Definition Of

Abstract The data base requirements for concurrent design systems are discussed. An object-oriented data base, which allows for definition of complex objects, specification of relationships between objects, and modular expandability without affecting the existing information is defined. The data base is developed based on the object-oriented data model implemented in Smalltalk-80. An assumption-based truth maintenance system for maintaining the dependency relationships between design and manufacturing information is described.

Heuristics Based Feature Recognition: A Graph Approach

1994 ◽  
Author(s):  
Shyam V. Narayan ◽  
Zhi-Kui Ling
Keyword(s):  
Engineering Design ◽  
Surface Finish ◽  
Feature Recognition ◽  
Graph Representation ◽  
Heuristic Rules ◽  
Feature Identification ◽  
Design And Manufacturing ◽  
Feature Based ◽  
Manufacturing Features

Abstract Feature based modeling has been used as a means to bridge the gap between engineering design and manufacturing. Features can represent an artifact with higher level entities which relate directly to its design functionalities and manufacturing characteristics, such as surface finish, manufacturability, fits, tolerance etc. In this study, a heuristic based feature recognition approach is proposed by using the graph representation of a design. The process consists of two steps: subgraph construction, and subgraph to feature identification. In this study, the subgraph construction is accomplished by using a set of heuristic rules. The process of subgraph to feature identification is carried out with a set of integers and characters which represent the geometric, topological, and semantic characteristics of the corresponding feature. This feature recognition scheme is used for the identification of machine features in a design.

Robust Tolerance Design Considering Process Capability and Quality Loss

1999 ◽  
Author(s):  
Chang-Xue (Jack) Feng ◽  
Ravi Balusu
Keyword(s):  
Manufacturing Process ◽  
Lead Time ◽  
Process Capability ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Quality Loss Function ◽  
Capability Indices ◽  
Design And Manufacturing

Abstract Tolerance design bridges design and manufacturing. Concurrent design of tolerances and manufacturing processes may ensure the manufacturability, reduce the manufacturing and other related costs, decrease the number of fraction nonconforming (or defective rate), and shorten the production lead time. Since process capability indices relate tolerance specifications to manufacturing process capabilities, it is quite natural to apply them to concurrent design of tolerances and processes. As process shifts often exist in a manufacturing process, using Cp does not yield a good estimation of fraction nonconforming. Index Cpk does not precisely measure process shift either, but Cpm does. Therefore, this research compares the applications of Cp, Cpk and Cpm based on a numerical example of non-linear mechanical tolerance synthesis. In addition, the Taguchi quality loss function is used together with the manufacturing cost as the objective function.

Concurrent Design and Manufacturing for Mechanical Systems

1999 ◽  
Author(s):  
Kuang-Hua Chang ◽  
Javier Silva ◽  
Ira Bryant
Keyword(s):  
Decision Making ◽  
Product Development ◽  
Product Design ◽  
Development Process ◽  
Product Performance ◽  
Product Development Process ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Design Decision ◽  
Design And Manufacturing

Abstract Conventional product development process employs a design-build-break philosophy. The sequentially executed product development process often results in a prolonged lead-time and an elevated product cost. The proposed concurrent design and manufacturing (CDM) process employs physics-based computational methods together with computer graphics technique for product design. This proposed approach employs Virtual Prototyping (VP) technology to support a cross-functional team analyzing product performance, reliability, and manufacturing cost early in the product development stage; and conducting quantitative trade-off for design decision making. Physical prototypes of the product design are then produced using Rapid Prototyping (RP) technique primarily for design verification purposes. The proposed CDM approach holds potential for shortening the overall product development cycle, improving product quality, and reducing product cost. A software tool environment that supports CDM for mechanical systems is being built at the Concurrent Design and Manufacturing Research Laboratory (http://cdm.ou.edu) at the University of Oklahoma. A snap shot of the environment is illustrated using a two-stroke engine example. This paper presents three unique concepts and methods for product development: (i) bringing product performance, quality, and manufacturing cost together in early design stage for design considerations, (ii) supporting design decision-making through a quantitative approach, and (iii) incorporating rapid prototyping for design verification through physical prototypes.

An approach to identify design and manufacturing features from a data exchanged part model

2003 ◽  
Vol 35 (11) ◽  
pp. 979-993 ◽  
Author(s):  
M.W. Fu ◽  
S.K. Ong ◽  
W.F. Lu ◽  
I.B.H. Lee ◽  
A.Y.C. Nee
Keyword(s):  
Design And Manufacturing ◽  
Manufacturing Features ◽  
Part Model
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