Explicit reference modeling methodology in parametric CAD system

2014 ◽  
Vol 65 (1) ◽  
pp. 136-147 ◽  
Author(s):  
Yannick Bodein ◽  
Bertrand Rose ◽  
Emmanuel Caillaud
Keyword(s):  
Cad System ◽  
Modeling Methodology ◽  
Reference Modeling ◽  
Explicit Reference ◽  
Parametric Cad

Development of Parametric CAD System Based on Pro / Toolkit and Database Technology

2011 ◽  
Vol 55-57 ◽  
pp. 2235-2241 ◽  
Author(s):  
Hui Lan Zhou
Keyword(s):  
User Interface ◽  
Dynamic Link Library ◽  
Cad System ◽  
Mechanical Part ◽  
Data Object ◽  
Standard Part Library ◽  
Database Technology ◽  
Parametric Cad ◽  
Developing Method ◽  
Dynamic Link

With Pro/Toolkit of Pro/E and ADO(ActiveX Data Object) database technology, part parametric CAD system is developed and an successful instance is introduced in the paper. In the CAD system, interface between Pro/E and VC++6.0 is created correctly using Pro / Toolkit and user interface for part parametric designing can be achieved by means of dll( dll dynamic link) library built in VC++6.0 .Meanwhile ADO database is applied in the CAD system to manage all part parameters and thus part revising and updating can be realized quickly. The developing method in the CAD system not only is applicable to typical mechanical part designing but also be helpful to establishing standard part library.

An Architecture for VR-Based Virtual Prototyping of Human-Operated Systems

1998 ◽  
Author(s):  
Sankar Jayaram ◽  
Scott R. Angster ◽  
Sanjay Gowda ◽  
Uma Jayaram ◽  
Robert R. Kreitzer
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Virtual Prototyping ◽  
Product Development Process ◽  
Open Architecture ◽  
Cad System ◽  
Human Modeling ◽  
Cad Cam ◽  
Third Person ◽  
Parametric Cad

Abstract Virtual prototyping is a relatively new field which is significantly changing the product development process. In many applications, virtual prototyping relies on virtual reality tools for analysis of designs. This paper presents an architecture for a virtual prototyping system which was created for the analysis of automotive interiors. This flexible and open architecture allows the integration of various virtual reality software and hardware tools with conventional state-of-the-art CAD/CAM tools to provide an integrated virtual prototyping environment. This architecture supports the automatic transfer of data from and to parametric CAD systems, human modeling for ergonomic evaluations (first person and third person perspectives), design modifications in the virtual environment, distributed evaluations of virtual prototypes, reverse transfer of design modifications to the CAD system, and preservation of design intent and assembly intent during modifications in the virtual environment.

A Method for Automatic Generation of Parametric Computer Aided Design Models in a Mold Base e-Catalog System

2006 ◽  
Vol 6 (3) ◽  
pp. 308-314 ◽  
Author(s):  
Duhwan Mun ◽  
Heungki Kim ◽  
Kwangsub Jang ◽  
Junmyun Cho ◽  
Junhwan Kim ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Parametric Method ◽  
Automatic Generation ◽  
Configuration Design ◽  
Design Models ◽  
Cad System ◽  
Computer Aided ◽  
Cad Models ◽  
Parametric Cad ◽  
Aided Design

Reusing existing design models and utilizing an e-Catalog for components are required for faster product development. For the acceleration, an e-Catalog should provide parametric computer aided design (CAD) models, since parametric information is necessary for configuration design. There are difficulties, however, in building a parametric library of all the necessary combinations using a CAD system, because there are too many component combinations for each product. To overcome this problem, we propose a table parametric method to generate parametric CAD models automatically, and describe its details.

Generic Simulation Approach for Multi-Axis Machining, Part 1: Modeling Methodology

2002 ◽  
Vol 124 (3) ◽  
pp. 624-633 ◽  
Author(s):  
T. Bailey ◽  
M. A. Elbestawi ◽  
T. I. El-Wardany ◽  
P. Fitzpatrick
Keyword(s):  
Complex Surface ◽  
Calibration Procedure ◽  
Cutting Edge ◽  
Surface Topology ◽  
Sculptured Surfaces ◽  
Local Surface ◽  
Nurbs Curve ◽  
Cad System ◽  
Modeling Methodology ◽  
Edge Profile

This paper presents a new methodology for analytically simulating multi-axis machining of complex sculptured surfaces. A generalized approach is developed for representing an arbitrary cutting edge design, and the local surface topology of a complex sculptured surface. A NURBS curve is used to represent the cutting edge profile. This approach offers the advantages of representing any arbitrary cutting edge design in a generic way, as well as providing standardized techniques for manipulating the location and orientation of the cutting edge. The local surface topology of the part is defined as those surfaces generated by previous tool paths in the vicinity of the current tool position. The local surface topology of the part is represented without using a computationally expensive CAD system. A systematic prediction technique is then developed to determine the instantaneous tool/part interaction during machining. The methodology employed here determines cutting edge in-cut segments by determining the intersection between the NURBS curve representation of the cutting edge and the defined local surface topology. These in-cut segments are then utilized for predicting instantaneous chip load, static and dynamic cutting forces, and tool deflection. Part 1 of this paper details the modeling methodology and demonstrates the capabilities of the simulation for machining a complex surface. Part 2 details both the model calibration procedure and discusses a case study of process optimization through feed rate scheduling.

Representation of Swept Volumes in a Parametric CAD System Using Trajectory Information From Virtual Environments

1999 ◽  
Author(s):  
Yong Wang ◽  
Sankar Jayaram ◽  
Uma Jayaram ◽  
Kevin Lyons ◽  
Peter Hart
Keyword(s):  
Virtual Environment ◽  
Three Dimensional ◽  
Trajectory Data ◽  
Cad System ◽  
Modeling Techniques ◽  
Swept Volumes ◽  
Implicit Modeling ◽  
Parametric Cad ◽  
Swept Volume ◽  
The Individual

Abstract Swept volumes are the volumes created by a part moving in space during the process of assembly, disassembly, service, etc. Swept volumes represent important manufacturing, maintainability, and serviceability data. Several graphical and implicit modeling techniques are currently available to create and represent swept volumes as three-dimensional polygonal blobs. In this paper, we present a method for generating swept volumes from trajectory data created in a virtual graphics environment during an assembly/disassembly scenario. The individual instances can be edited in the virtual environment by swept instance removal and modification of position and orientation of instances. Using a synchronous link between the virtual environment and the CAD system, the trajectory information from the virtual environment is used along with the parametric model in the CAD system to create swept volume geometry directly in a parametric CAD system as a feature of the assembly. In addition, using the synchronous link, this swept volume (not just instances along the trajectory) can then be exported back to the original virtual environment and displayed. This method can handle any sweeping trajectory and does not restrict the geometry or the topology requirement of the sweeping object. The swept volumes generated this way are accurate, concise, and can be easily processed by CAD systems.

Design and Implementation of the Parametric Designing System Based on ADO

2012 ◽  
Vol 487 ◽  
pp. 281-284 ◽  
Author(s):  
Jian Xia Li ◽  
Jing Jing Huang
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Rolling Bearing ◽  
Second Development ◽  
Cad System ◽  
Design And Implementation ◽  
System Database ◽  
Parametric Cad ◽  
Total Design

With the example of the parametric CAD system of the rolling bearing, the parametric design method to the second development of the AutoCAD system based on VB by using extra database is introduced in this paper. This system can visit the extra database by ADO technique, complete the total design of the system, create the system database, realize the parametric design and parametric drawing.

A Rapid Parametric CAD System for Fine-Blanking Progressive Dies

2010 ◽  
Vol 102-104 ◽  
pp. 252-256 ◽  
Author(s):  
Yi Lin Wang ◽  
Hui Cai Long
Keyword(s):  
Development Process ◽  
Design Method ◽  
Die Design ◽  
Fine Blanking ◽  
Progressive Die ◽  
Cad System ◽  
Progressive Dies ◽  
Die Structure ◽  
Parametric Cad ◽  
Progressive Die Design

Fine-blanking is an advanced and precision stamping process. Designing the construction die is an important part of the entire development process. But for lots of special and complicated structures of fine-blanking dies, especially some progressive dies, many problems occurred during the traditional two-dimensional design method, such as heavy workload, time-consuming, difficulty of modification, difficulty of checking interference, difficulty of novice entry. To solve these problems, a rapid parametric CAD system based on SolidWorks is developed for fine-blanking progressive dies in the present study. The system comprises five modules, namely DIEBASE, WORKPART, STANDARD, MOTION and DRAWING. The first three modules are designed for the rapid designing and modeling of three different sets of die components. These modules work in tandem with the design-table-based standard part libraries. The MOTION module is designed to simulate the movement situation and check the interferences of the die structure. The last module is designed for the drawing documents of the die parts and assembly. The main feature of the system is its parameter-based interfacing for fine-blanking progressive die design. The design and modification jobs could be done easily and quickly by operating this system, and the system is easy to learn for semiskilled and even unskilled engineers. An illustrative example is demonstrated to show the usefulness of the system.

A Programming Language Approach to Parametric CAD Data Exchange

2011 ◽  
Author(s):  
John Altidor ◽  
Jack Wileden ◽  
Jeffrey McPherson ◽  
Ian Grosse ◽  
Sundar Krishnamurty ◽  
...  
Keyword(s):  
Programming Language ◽  
Information Integration ◽  
Computer Aided Design ◽  
Data Exchange ◽  
Cad Systems ◽  
Cad System ◽  
Parametric Data ◽  
Language Research ◽  
Parametric Cad ◽  
Aided Design

Data exchange between different computer-aided design (CAD) systems is a major problem inhibiting information integration in collaborative engineering environments. Existing CAD data format standards such as STEP and IGES enable geometric data exchange. However, they ignore construction history, features, constraints, and other parametric-based CAD data. As a result, they are inadequate for supporting modification, extension and other important higher-level functionality when accessing an imported CAD model from another CAD system. Achieving such higher-level functionality therefore often requires a time-consuming, error-prone, tedious process of manually recreating the model in the target CAD system. Based on techniques adapted from programming language research, this paper presents an approach to exchanging parametric data between CAD systems using formally-defined conversion semantics. We have demonstrated the utility of our approach by developing a prototype implementation that automates the conversion of 2D sketches between two popular CAD systems: Pro/ENGINEER and SolidWorks. We present examples showing that our approach is able to accurately convert parametric CAD data even in cases where models were constructed using operations from the source CAD system that have no direct counterpart in the target CAD system. Although the case study focuses on 2D interoperability, our approach provides formal foundations for supporting 3D and semantic interoperability between CAD systems.

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