scholarly journals Design Parameterization for Concurrent Design and Manufacturing of Mechanical Systems

2001 ◽  
Author(s):  
Kuang-Hua Chang ◽  
Javier Silva
Keyword(s):  
Product Design ◽  
Computer Aided Design ◽  
Product Development Process ◽  
Solid Model ◽  
Concurrent Design ◽  
Product Model ◽  
Design Changes ◽  
Solid Models ◽  
Design And Manufacturing ◽  
Product Assembly

Abstract Design changes are frequently encountered in the product development process. The complexity of the design changes is multiplied when the product design involves multiple engineering disciplines. Very often, a simple change in one part may propagate to its neighboring parts, therefore, affects the entire product assembly. Both parts and assembly must be regenerated for a physically valid product model, at the same time, the regenerated product model must meet designer’s expectations. When a product is being developed in a Concurrent Design and Manufacturing (CDM) environment, the design changes are usually implemented first by altering geometry of the product represented in computer-aided design (CAD) solid models. If the product solid model is not parameterized properly, the changes in geometry often lead to invalid parts or assembly. At the part level, the changes may yield a solid model with invalid geometric features if it is not properly parameterized. In this case, the entire product assembly is in vain. Even when individual parts of the product are regenerated correctly, parts may still penetrate to their neighboring parts or leave excessive gaps among them, if the solid model is not properly parameterized at the assembly level. In this paper, solid modeling and assembly techniques implemented in two major CAD tools, Pro/ENGINEER and SolidWorks, will be discussed. A set of guidelines will be proposed for the designers to parameterize the solid models in order to capture the design intents more effectively in the product virtual mockup. These guidelines at both part and assembly levels will support designers to successfully conduct product design in the CDM environment. A number of examples, including a slider-crank mechanism and its crankshaft, a single-piston airplane engine and its components, as well as a number of simpler parts are presented to illustrate and demonstrate the parameterization method and guidelines proposed for both Pro/ENGINEER and SolidWorks.

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.

A Machine Learning Framework for Decision Support in Design and Manufacturing

2021 ◽  
pp. 479-498
Author(s):  
Aditya Balu ◽  
Sambit Ghadai ◽  
Gavin Young ◽  
Soumik Sarkar ◽  
Adarsh Krishnamurthy
Keyword(s):  
Product Development ◽  
Computer Aided Design ◽  
Iterative Process ◽  
Development Process ◽  
Product Development Process ◽  
Design Environment ◽  
Learning Framework ◽  
Design And Manufacturing ◽  
Product Design Process ◽  
Aided Design

The widespread adoption of computer-aided design (CAD) and manufacturing (CAM) tools has resulted in the acceleration of the product development process, reducing the time taken to design a product [46]. However, the product development process, for the most part, is still decentralized with the design and manufacturing reviews being performed independently, leading to differences between as-designed and as-manufactured component. A successful product needs to meet its specifications, while also being manufacturable. In general, the design engineer ensures that the product is able to function according to the specified requirements, while the manufacturing engineer gives feedback to the design engineer about its manufacturability. This iterative process is often time consuming, leading to longer product development times and higher costs. Recent researches in integrating design and manufacturing [24, 28, 46] have tried to reduce these differences and making the product development process easier and accessible to designers, who may not be manufacturing experts. In addition, there have been different efforts to enable a collaborative product development process and reduce the number of design iterations [8, 10, 41]. However, with the increase in complexity of designs, integrating the manufacturability analysis within the design environment provides an ideal solution to improve the product design process.

Integrating Design Process Knowledge With CAD Models

2001 ◽  
Author(s):  
Erik E. Hayes ◽  
William C. Regli
Keyword(s):  
Design Process ◽  
Computer Aided Design ◽  
Search Space ◽  
Temporal Changes ◽  
Boundary Representation ◽  
Process Knowledge ◽  
Solid Models ◽  
Design And Manufacturing ◽  
Cad Models ◽  
Manufacturing Problems

Abstract Solid models are static entities, often defined by boundary representation models as sets of enclosing surfaces. Constructive Solid Geometry and feature-based computer-aided design environments create procedural descriptions of 3D objects in forms of history or CSG trees. These representations are temporally fixed, i.e., they describe the state of an object at a point in time. This paper describes a method to represent and capture temporal evolution of solid models — what we call model process history. We define process history to be all states of a model — the search space of design process. This paper presents a representational formalism we call model process graphs (MPGs). We use MPGs to integrate a model’s description with a model of temporal changes that occur during the design process. We believe that MPG representations can have valuable application for many design and manufacturing problems. The paper describes our preliminary results to use MPGs to (1) create a record of design process; (2) store process-based design rationale; (3) represent in-process shapes for machined artifacts. We anticipate that similar structures will find application in other design and manufacturing problems where important process knowledge is embodied by temporal changes occurring in model evolution.

Embracing Product Design Engineering

2007 ◽  
Author(s):  
Hugh Jack ◽  
John Farris ◽  
Shabbir Choudhuri ◽  
Princewill Anyalebechi ◽  
Charlie Standridge
Keyword(s):  
Product Design ◽  
Development Process ◽  
Product Development Process ◽  
State University ◽  
Major Focus ◽  
Engineering Programs ◽  
Disciplinary Boundaries ◽  
Engineering Program ◽  
Course Work ◽  
Design And Manufacturing

A Product Design and Manufacturing (PDM) Engineering emphasis has been designed to update a Manufacturing Engineering program at Grand Valley State University. While the program continues to include a major focus on manufacturing it also emphasizes crossing disciplinary boundaries for product design. Graduates of the program are educated to work in all phases of the product development process from concept to customer. The program includes a blend of courses from a variety of disciplines, tieing these together using a sequence of product design courses. Within the courses students are exposed to course work that encourages product oriented design including prototyping. The program redesign described in the paper could also be applied to Mechanical Engineering programs.

scholarly journals The Open Assembly Model for the Exchange of Assembly and Tolerance Information: Overview and Example

2004 ◽  
Author(s):  
M. M. Baysal ◽  
U. Roy ◽  
R. Sudarsan ◽  
R. D. Sriram ◽  
K. W. Lyons
Keyword(s):  
Product Development ◽  
Information Exchange ◽  
Computer Aided Design ◽  
Product Information ◽  
Product Lifecycle Management ◽  
Product Development Process ◽  
Assembly Model ◽  
Model Data ◽  
Product Model ◽  
Seamless Integration

In early design phases an effective information exchange among CAD (Computer Aided Design) tools depends on a standardized representation for the product data in all PLM (Product Lifecycle Management) tools. The NIST Core Product Model (CPM) and its extension are proposed to provide the required base-level product model that is open, non-proprietary, generic, extensible, independent of any one product development process and capable of capturing the full engineering context commonly shared in product development [1,2]. The Open Assembly Model (OAM) Model extends CPM to provide a standard representation and exchange protocol for assembly. The assembly information model emphasizes the nature and information requirements for part features and assembly relationships. The model includes both assembly as a concept and assembly as a data structure. For the latter it uses the model data structures of ISO 10303, informally known as the Standard for the Exchange of Product model data (STEP)[3]. The objective of the paper is to show how the OAM can be used to realize seamless integration of product information, with an emphasis on assembly, throughout all phases of a product design. A gearbox design example is used to illustrate the process.

Defining and Recognizing Cavity and Protrusion by Volumes

1993 ◽  
Author(s):  
Hiroshi Sakurai ◽  
Chia-Wei Chin
Keyword(s):  
Feature Recognition ◽  
Graph Matching ◽  
Solid Model ◽  
Solid Object ◽  
Spatial Decomposition ◽  
Solid Models ◽  
Design And Manufacturing ◽  
Convexity And Concavity ◽  
Better Than

Abstract In design and manufacturing, cavity features, such as holes and pockets, and protrusion features, such as bosses and ribs are commonly used. In this work, cavity and protrusion in a solid object were defined with the volumes enclosed by the faces of the object and their extensions. These definitions of cavity and protrusion match our intuitive notions of cavity and protrusion better than the commonly used definitions that consider the convexity and concavity of edges. Together with an algorithm called “spatial decomposition and composition”, the definitions provide a method to find cavities and protrusions in solid models. By applying graph matching commonly used in feature recognition to the volumes of cavity and protrusion, all the features in a solid model can be recognized whether they intersect or not.

Sustained CAD/CAE Application Integration: Supporting Simplified Models

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Robert Kirkwood ◽  
James A. Sherwood
Keyword(s):  
Computer Aided Design ◽  
Ad Hoc ◽  
Product Development Process ◽  
Solid Models ◽  
Computer Aided ◽  
Major Subset ◽  
Cad Cam ◽  
Cad Models ◽  
Manual Interaction ◽  
Aided Design

Abstract Computer-aided design/computer-aided manufacturing/computer-aided engineering (CAD/CAM/CAE) integration offers designers, analysts, and manufacturers the opportunity to share the data throughout the product development process. Finite element (FE) meshing applications integrated with the solid model data from CAD systems represent a major subset of CAD/CAM/CAE integration. In an earlier paper, it was demonstrated that virtual persistent identifiers (VPIs) can be used to assure or repair sustained integration with successive versions of neutral-format solid models. From that article, several follow-on issues become apparent. The geometry as per the CAE model often differs from the CAD model, so even with cross-format issues resolved, significant obstacles to sustained CAD/CAE integration remain. Along with simplification, the current article investigates additional techniques for further automating the recognition of changes between CAD models, reducing the manual interaction to just a few minutes. The article goes on to demonstrate how associativity can be sustained when using current versions of neutral formats like STEP and IGES. The overall point of the paper is to show that given a precise recognition of the differences between two solid models, a generalized means of ad-hoc integration is possible. This point is demonstrated through two case studies where simplifications of the CAD geometry are made to facilitate the meshing of the part. The integration is shown to be maintained across successive versions and to address a range of simplification processing. A summary of best practices for efficiently accommodating sustained CAD/CAE integration is also presented.

Shape Knowledge Annotation for Virtual Product Sharing and Reuse

2008 ◽  
Author(s):  
C. E. Catalano ◽  
B. Falcidieno ◽  
M. Attene ◽  
F. Robbiano ◽  
M. Spagnuolo
Keyword(s):  
Product Design ◽  
Ad Hoc ◽  
Semantic Annotation ◽  
Product Development Process ◽  
Product Model ◽  
3D Objects ◽  
Model Segmentation ◽  
Set Up ◽  
Virtual Product ◽  
Selection Of

This paper explores a promising framework, the ShapeAnnotator, for the semantic annotation of 3D objects in the context of Product Design. The ShapeAnnotator provides the functionalities that allow the user to load a suitable formalization of relevant concepts and to annotate, or tag, a virtual product model, or its parts, with these concepts (markup). Moreover, the ShapeAnnotator provides tools that support the users in the identification and selection of the relevant parts in the virtual product model (segmentation toolbox). An ad hoc form feature ontology has been developed and a specific application scenario has been set up for the validation of the approach in the reverse engineering scenario. Through the ShapeAnnotator, objects can be described by semantic annotations and also its meaningful features can be explicitly described independently and further characterized by specific attributes and relations with other parts and/or features. The contextualization of the ShapeAnnotator for Product Design is the first step towards the integration of knowledge formalization and geometric reasoning techniques, which will support the interoperability in the Product Development Process.

scholarly journals When Design Never Ends - A Future Scenario for Product Developement

2019 ◽  
Vol 1 (1) ◽  
pp. 829-838 ◽  
Author(s):  
Patrick Pradel ◽  
Robert Ian Campbell ◽  
Richard Bibb
Keyword(s):  
Additive Manufacturing ◽  
Product Design ◽  
Design Process ◽  
Development Process ◽  
Product Development Process ◽  
Future Scenario ◽  
Development Models ◽  
Consumer Value ◽  
Traditional Design ◽  
Design And Manufacturing

AbstractOne of the foundations of product design is the division between production and design. This division manifests as designers aspiring to create fixed iconic archetypes and production replicates endlessly in thousands or millions. Today innovation and technological change are challenging this idea of product design and manufacturing. The evolution of Rapid Prototyping into Additive Manufacturing (AM), is challenging the notion of mass manufacture and consumer value. As AM advances in capability and capacity, the ability to economically manufacture products in low numbers with high degrees of personalisation poses questions of the accepted product development process. Removing the need for dedicated expensive tooling also eliminates the cyclical timescales and commitment to fixed designs that investment in tooling demands. The ability to alter designs arbitrarily, frequently and responsively means that the traditional design process need not be applied and because of this, design processes and practice might be radically different in the future. In this paper, we explore this possible evolution by drawing parallels with principles and development models found in software development.

Enabling Cyber-Based Learning of Product Sustainability Assessment Using Unit Manufacturing Process Analysis

2017 ◽  
Author(s):  
Kamyar Raoufi ◽  
Karl R. Haapala ◽  
Gül E. Okudan Kremer ◽  
Kyoung-Yun Kim ◽  
Carolyn E. Psenka ◽  
...  
Keyword(s):  
Product Design ◽  
Systems Engineering ◽  
Engineering Students ◽  
Sustainability Assessment ◽  
Process Analysis ◽  
Sustainable Product Design ◽  
Design Changes ◽  
Design And Manufacturing ◽  
Sustainable Product ◽  
Sustainability Assessments

Efforts to reduce product environmental impacts such as energy consumption and carbon footprint have received attention for many years, often driven by consumer pressure on companies to produce more environmentally friendly products. As the next generation of engineers who will take responsibility for advancing the sustainability of products, processes, and systems, engineering students need to become more familiar with the concepts of sustainable product design and manufacturing. Yet, educators are disadvantaged in training these students, and tools are deficient in assisting product sustainability assessments for manufacturing decision making by other non-experts. A manufacturing analysis module is introduced, which was developed under collaborative research titled, Constructionism in Learning: Sustainable Life Cycle Engineering (CooL:SLiCE). This CooL:SLiCE manufacturing analysis module provides an opportunity for non-expert students and engineers to investigate the impacts of product design changes on manufacturing processes and supply chain network configurations, e.g., selection of upstream processes, transportation routes, and transportation modes, from environmental responsibility perspective. One popular consumer product, a multicopter, is selected to demonstrate the module. The production of three hexacopter components are evaluated: the upper shell, lower shell, and propeller. The manufacturing analysis module enables non-experts to gain a better understanding of sustainable product design and manufacturing.

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