The Integration Of Design And Manufacturing Using A Design-With-Features Approach For Turned Components

1991 ◽  
pp. 66-73
Author(s):  
Ariffin Abdul Razak
Keyword(s):  
Process Plan ◽  
Front End ◽  
Design And Manufacturing ◽  
Feature Based ◽  
Manufacturing Features

This paper describes the work that has been done with an intention to integrate the design and manufacturing functions by developing a feature-based 'front-end' to a CAD solid mode11er. This enables designers to express their concepts in terms of manufacturing features and processes, and simultaneously captures this information in a form suitable for an outline process plan.

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.

A Feature Extraction Interface for CAD Part Models

1991 ◽  
Author(s):  
David R. Nitschke ◽  
Yuh-Min Chen ◽  
R. Allen Miller
Keyword(s):  
Design System ◽  
Relative Positioning ◽  
Neutral Form ◽  
Cad System ◽  
Knowledge Based ◽  
Functional Specification ◽  
Design And Manufacturing ◽  
Feature Based ◽  
The Individual ◽  
Knowledge Based Design

Abstract The concept of “Features” has been recognized as a neutral form of communication between design and manufacturing. Since virtually all CAD systems define part models using B-Rep or CSG formats, a facility is needed to convert geometry based part models to ones which are feature based. This paper outlines the framework of a facility which would enable part models from any type of CAD system to be converted to a format which could be analyzed using a knowledge based design system. This facility relies on the user to recognize and isolate the individual features of the model and then extracts the dimensions, locations and relative positioning of the features within the model. These features are then organized into a feature graph for the construction of a feature based part representation. The procedures for the construction of this part representation include feature instantiation, feature placement and functional specification.

scholarly journals Thematic Ideation: A Superior Supplementary Concept in Creativity and Innovation

SAGE Open ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 215824402094742
Author(s):  
Rakhshan Ummar ◽  
Sharjeel Saleem
Keyword(s):  
Mixed Method ◽  
Purchase Intention ◽  
New Products ◽  
Future Directions ◽  
Fuzzy Front End ◽  
Front End ◽  
Mixed Method Design ◽  
Feature Based ◽  
Creativity And Innovation ◽  
Product Idea

New products improve competitiveness through their creativity and innovativeness. Creativity and innovativeness are parallel yet non-identical concepts; newly introduced products are either somewhat thematically similar or taxonomically similar to the existing products. There is a need for the explication of creativity and innovativeness as separate or as unified concepts in newly developed products, in particular, thematic products. A mixed-method design was adopted to establish definitions and components of creativity and innovativeness in the ideas presented at the innovation summit through 489 perceptual reports on 14 feature-based and theme-based product ideas. On the whole, three components—originality, value, and commercial appeal—were derived and tested. Results revealed the significance of originality as a major component of creativity and innovativeness in all products. Perceived value was significantly related to originality in both taxonomic and thematic products. Originality and value predicted creativity whereas innovativeness was predicted by commercial appeal along with originality and value in all products. The underlying purchase intention in taxonomic and thematic product ideas was the product’s relatedness with lifestyle. A product idea to be implemented in business as innovation was found to be dependent on its creativity and commercial appeal. This asserted three factors mandatory at the Fuzzy Front End (FFE), namely, originality, value, and commercial appeal. Discussion includes the interpretation of results and future directions.

A Digraphic Approach for Dimensional Chain Identification in Design and Manufacturing

1996 ◽  
Vol 118 (4) ◽  
pp. 539-544 ◽  
Author(s):  
P. Ji ◽  
J. Y. H. Fuh ◽  
R. S. Ahluwalia
Keyword(s):  
Dimensional Chain ◽  
Process Plan ◽  
Tolerance Charting ◽  
Tolerance Chart ◽  
Design And Manufacturing ◽  
The Relationship

In order to determine working dimensions and tolerances of a process plan, a tolerance chart is often employed. Dimensional chain identification is a necessary step in the tolerance charting procedures. This paper presents a digraphic representation for the tolerance chart. Two directed trees are generated from working dimensions, blueprint dimensions and stock removals of the tolerance chart. These trees are then used to identify dimensional chains in order to find the relationships among the design and manufacturing dimensions. Furthermore, the concept of a reverse dimensional chain is introduced. The reverse dimensional chains can also be identified from the directed trees. The relationship between the forward and reverse dimensional chains is also discussed. Finally, the applications of dimensional chains to the determination of the working dimensions and tolerances are briefly described.

A Feature-Based Approach for Representing Composite Components

2002 ◽  
Author(s):  
X. William Xu
Keyword(s):  
Composite Materials ◽  
Concurrent Engineering ◽  
Material Design ◽  
Composite Component ◽  
Development Environment ◽  
Suggested Approach ◽  
Design And Manufacturing ◽  
Materials Research ◽  
Feature Based ◽  
Feature Based Design

The progress with which composite materials are being used in industry has been staggering. The methods, processes and procedures of developing and manufacturing composite materials have always been the center stage for the composite materials research and applications. While feature technologies, in particular feature-based design, have been widely practiced by many in the areas of designing and manufacturing conventional materials, one has not yet seen it help to reap the benefits for composite materials manufacturing. This paper proposed a feature-based approach for representing composite components. Two types of features have been defined, structural and geometrical. Based on the suggested approach toward representing features on a composite component, a concurrent engineering kernel is being developed, in which design and manufacturing of composite manufacturing come together seamlessly to enable a complete product development environment for composite material design and manufacturing.

Integration of CAD, CAPP and Process Modeling Using XML Technologies

2006 ◽  
Author(s):  
Pravin Khurana ◽  
Dusan N. Sormaz ◽  
Raghunath Khetan
Keyword(s):  
Process Planning ◽  
Process Modeling ◽  
Process Design ◽  
Software Tool ◽  
Cad Model ◽  
Computer Aided ◽  
Cad Models ◽  
Feature Based ◽  
Manufacturing Features

Integration of CAD (Computer Aided Design), CAPP (Computer Aided Process Planning) and Process Modeling activities plays a vital role in enabling concurrent product and process design. Typically each of these functions is performed in its own dedicated software environment. The integration will require interfacing several disconnected processes and software components built in different languages, and platforms. This paper presents an integration methodology, validated using a case study, in which a steering housing was analyzed and its process planning and design tasks were integrated using several software tools. The first integration task was to generate a feature based CAD model (in Unigraphics) and map these design features to a set of manufacturing features. Feature based design was performed using the Horizontal Modeling™ approach developed at Delphi. Features developed using this approach were then mapped to manufacturing features using APPS, a software tool developed at Delphi Dynamics and Propulsion Innovation Center. This task involved interrogation of the geometric CAD model to generate geometric and tolerance information and represent them in a format suitable for feature-based process planning. The second task of integration is generation of feasible “production-intent” process plans. This task is performed using APPS and IMPlanner process planner, a knowledge based software tool developed at Ohio University. The third and final task of integration is automated generation of in-process CAD models. This task involved the integration of Delphi process design techniques to generate CAD models (in Unigraphics) to represent the component at each stage of the manufacturing process. Evaluation of these steps through the case study has identified the strengths and weaknesses of the proposed integration methodology, which is reported in this paper.

Design of Products for an Agile Manufacturing Environment

1994 ◽  
Author(s):  
Andrew Kusiak ◽  
Chang-Xue Feng
Keyword(s):  
Concurrent Engineering ◽  
Cost Effective ◽  
Setup Time ◽  
Agile Manufacturing ◽  
Manufacturing Companies ◽  
Basic Principles ◽  
Design And Manufacturing ◽  
Feature Based ◽  
Lot Sizes ◽  
Feature Based Design

Abstract Many manufacturing companies have been striving to reduce setup times in order to produce smaller lot sizes and to obtain quicker responses to frequently changing market demands. This paper focuses on the reduction of setup time by design improvements of products. Based on the basic principles of setups and concepts from concurrent engineering, rules for design of products at the feature level are presented. Examples and computational results illustrate that the inter-lot setups and in-lot setups can be reduced by the feature-based design rules. The proposed approach for setup reduction appears to be more cost effective than optimizing the processes and operations where the product designs have been fixed. This research intends to bridge the gap between engineering design and manufacturing.

FDDL: A Feature Based Design Description Language

1989 ◽  
Author(s):  
P. H. Gu ◽  
H. A. ElMaraghy ◽  
L. Hamid
Keyword(s):  
Computer Aided Design ◽  
Ease Of Use ◽  
Feature Representation ◽  
Planning System ◽  
Mechanical Assembly ◽  
Description Language ◽  
Design And Manufacturing ◽  
Feature Based ◽  
Representation Scheme ◽  
Feature Based Design

Abstract This paper presents the development of a new high-level design language called Feature based Design Description Language — FDDL. The traditional and computer-aided design and manufacturing procedures were analyzed and the important gaps between CAD and CAM have been identified. These include the lack of uniform representation of parts and products, and lack of effective links between CAD and CAM. The FDDL is proposed and designed in association with a feature representation scheme as a means of integrating design and manufacturing tasks planning. Its syntax, semantics and vocabulary have been defined taking into consideration ease of use, compatibility with engineering terminology and ease of computer implementation. The FDDL system consists of a number of lexical analyzers, a parser and three code generators. Once the products or parts modeled using FDDL or the feature based modeler are processed by the FDDL system, syntax error free input files are created for use by manufacturing task planning systems. The FDDL has been applied to a feature based cellular manufacturing planning system, an expert automated CMM inspection task planner, and a mechanical assembly sequence planner.

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