A Virtual Engineering System for Electromechanical Products

1995 ◽  
Author(s):  
N. Narikawa ◽  
T. Kuroiwa ◽  
T. Fujinuma ◽  
S. Sekimoto
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
Database System ◽  
Engineering System ◽  
3D Cad ◽  
Cad System ◽  
Virtual Engineering ◽  
Engineering Database ◽  
Essential Components ◽  
Electromechanical Products

Abstract This paper gives an overview of virtual enginecring (VE) system for electromechanical products. To reduce design costs and to manufacture high-quality products, it is well known that concurrent engineering (CE) is very efficient approach. Three-dimensional (3D) CAD system and engineering database system are essential components of CE. VE system is an environment to realize CE. By creating 3D models in a computer and performing some simulations such as mechanical, electronic, software simulation and integrated simulations, it is possible to estimate functions, assemblability, manufacturability and so on, without making prototype models. In this paper, we outline the VE system and mainly discuss the engineering database system which makes an important role of the VE system. This system is developed by applying the object oriented technology.

Collaborative Design System for Electromechanical Products

1996 ◽  
Author(s):  
Noboru Narikawa ◽  
Kazuo Takahashi
Keyword(s):  
Collaborative Design ◽  
Three Dimensional ◽  
3D Models ◽  
Information Management System ◽  
Design System ◽  
3D Cad ◽  
Cad System ◽  
Essential Components ◽  
Electromechanical Products

Abstract This paper gives an overview of a collaborative design system (CDS) for electromechanical products. To reduce design costs and to manufacture high-quality products, it is well known that concurrent engineering (CE) is a very efficient approach. Three-dimensional (3D) CAD system and engineering database system are essential components of CE. The CDS is an environment to realize CE. By creating 3D models in a computer and performing some simulations such as mechanical, electronic, software simulation and integrated simulations, it is possible to estimate functions, assemblability, manufacturability and so on, before making prototype models. In this paper, we outline the CDS and mainly discuss the total information management system (TIMS) which makes an important role of the CDS. This paper describes the implementation experience of some functions of the TIMS.

scholarly journals CALS Technologies in Mechanical Engineering Using the Example of Developing Three-Dimensional Models of Typical Products

2020 ◽  
Vol 26 (4) ◽  
pp. 637-649
Author(s):  
A. A. Popova ◽  
◽  
I. N. Shubin ◽  
R. E. Aliev ◽  
◽  
...  
Keyword(s):  
Complex Structure ◽  
Three Dimensional ◽  
3D Models ◽  
Machine Building ◽  
The Body ◽  
Body Parts ◽  
3D Cad ◽  
Cad System ◽  
Dimensional Models ◽  
Three Dimensional Models

Three-dimensional models of the body parts were developed using the basic 3D modeling operations (rotation, extrusion, threading, etc.) of the T-FLEX CAD 3D CAD system, which made it possible to significantly simplify the work with assembly 3D models representing a complex structure consisting of a large number of parts. During the trial operation, the advantages of using the T-FLEX CAD 3D CAD system have been proven when working with complex 3D models. The advantages of using the program in the machine-building cluster are shown.

Integrated and Intelligent Database Systems for Plant Engineering Framework

1994 ◽  
Author(s):  
N. Narikawa ◽  
T. Sato ◽  
N. Sasaki
Keyword(s):  
Three Dimensional ◽  
Database Systems ◽  
Database System ◽  
Structure Design ◽  
Object Oriented Programming ◽  
Design Knowledge ◽  
Automation System ◽  
Functional Requirements ◽  
Plant Structure ◽  
Cad System

Abstract This paper gives an overview of an integrated and intelligent database system for a plant engineering framework. We have integrated existing two-dimensional (2D) CAD systems, a three-dimensional (3D) CAD system, and a relational database system which stores engineering information such as design conditions, maintenance histories, and inherent properties. By integrating these systems, the infrastructure for concurrent engineering has been realized. As for design knowledge, we treat object-oriented programming as a useful knowledge representation method. We analyze the plant structure and functional requirements of the system, and then represented them by using the hierarchical Class structure. Design knowledge accompanies the Class, so we represent it using Method. As a design automation system, we develop an automated design check system. This is implemented by using the Common Lisp Object System. These systems are the main parts of the plant engineering framework, and are utilized in the practical design. We intend to develop a mechanical/electronic design framework using the same approach.

Development of CAD System Based on Function Features

2010 ◽  
Vol 447-448 ◽  
pp. 442-446
Author(s):  
Sonken Ando ◽  
Ryo Ikeda ◽  
Hideki Aoyama ◽  
Norihito Hiruma
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
Machining Process ◽  
Data Generation ◽  
Design Work ◽  
Detailed Design ◽  
Cad Systems ◽  
Cad System ◽  
Press Forming ◽  
Attribute Information

Three-dimensional CAD systems contribute considerably to the detailed design processes of products. They are applied to the construction of 3D design models which are also utilized for design evaluation using a CAE system and for NC data generation using a CAM system. Since the functions of 3D CAD systems for constructing 3D models are increasingly being enhanced, they enable designers to easily construct 3D product models without design expertise. In detailed design work, designers are required not only to exactly define product shapes but also to assign attribute information such as dimensional tolerance, geometrical tolerance, roughness, machining process to be performed etc., which are essential for the manufacturing process. However, inexperienced designers often find it extremely hard to determine optimum attribute values and design values. In addition, it is more difficult to construct the required die/mold from the desired product shape taking into account forming errors caused by shrinkage during plastic injection and springback during press forming. This paper proposes a method to automatically assign required attribute information to each part of a designed product, to assist the model construction of a die/mold from a product shape, and to provide design support information on each part of a designed product to a designer. The proposed method is realized by assigning a Function Feature to each part; all the function features proposed in this paper are original. A CAD system based on the proposed method for injection molding and press forming was developed, and results of simple design experiments confirmed the usefulness of the CAD system and function features

scholarly journals Problems of Creation and Usage of 3D Model of Structures and Theirs Possible Solution

Symmetry ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 181 ◽  
Author(s):  
Dalibor Bartonek ◽  
Michal Buday
Keyword(s):  
Computer Aided Design ◽  
3D Model ◽  
Three Dimensional ◽  
3D Models ◽  
Cad System ◽  
Building Models ◽  
Special Cad ◽  
Aided Design ◽  
The Church

This article describes problems that occur when creating three-dimensional (3D) building models. The first problem is geometric accuracy; the next is the quality of visualization of the resulting model. The main cause of this situation is that current Computer-Aided Design (CAD) software does not have sufficient means to precision mapping the measured data of a given object in field. Therefore the process of 3D model creation is mainly a relatively high proportion of manual work when connecting individual points, approximating curves and surfaces, or laying textures on surfaces. In some cases, it is necessary to generalize the model in the CAD system, which degrades the accuracy and quality of field data. The article analyzes these problems and then recommends several variants for their solution. There are described two basic methods: using topological codes in the list of coordinates points and creating new special CAD features while using Python scripts. These problems are demonstrated on examples of 3D models in practice. These are mainly historical buildings in different locations and different designs (brick or wooden structures). These are four sacral buildings in the Czech Republic (CR): the church of saints Johns of Brno-Bystrc, the Church of St. Paraskiva in Blansko, further the Strejc’s Church in Židlochovice, and Church of St. Peter in Alcantara in Karviná city. All of the buildings were geodetically surveyed by terrestrial method while using total station. The 3D model was created in both cases in the program AUTOCAD v. 18 and MicroStation.

Computer Aided Geometric Tolerance Specification in 3D-CAD System

2010 ◽  
Vol 34-35 ◽  
pp. 1238-1242
Author(s):  
Guo Wei Li ◽  
Wei Min Zhang ◽  
Peng Zhong Li ◽  
Yi Zhou Zhu
Keyword(s):  
Database System ◽  
Geometric Feature ◽  
Prototype System ◽  
Geometric Features ◽  
Geometric Tolerance ◽  
3D Cad ◽  
Cad System ◽  
Computer Aided ◽  
Tolerance Specification ◽  
Product Specifications

Tolerance specification is the activity of specifying tolerances. In current 3D-CAD system, tolerance types and tolerance values are specified by designer manully, and the validity checking of tolerance is no available. To achieve semi-automatic tolerance specification, geometric feature in the next-generation Geometrical Product Specifications and Verification (GPS) was introduced, the corresponding rules between geometric features and tolerance types were presented; The recommended values for tolerance were stored in a database system and constrainted by tolerance principles. Additionally, the implementation of computer aided geometric tolerance specification was proposed. Finally, the initial prototype system was developed to demonstrate the proposed scheme, which aides designer to define reasonable tolerance types and tolerance values in 3D-CAD system.

Three-Dimensional Kernel Development With Parasolid for Integral Sheet Metal Design With Higher Order Bifurcations

2009 ◽  
Author(s):  
Thomas Rollmann ◽  
Anselm Schu¨le ◽  
Reiner Anderl ◽  
Youssef Chahadi
Keyword(s):  
Product Design ◽  
Programming Languages ◽  
Sheet Metal ◽  
Three Dimensional ◽  
3D Models ◽  
Higher Order ◽  
Boundary Representation ◽  
Generation Process ◽  
3D Cad ◽  
Metal Design

The technology of linear flow splitting to produce bifurcated sheet metal structures is researched by the collaborative research center 666 since 2005. So far the product design process is supported by 3D-CAD models on the basis of User-Defined-Features in standard 3D-CAD systems. This paper now presents a new approach for generating 3D-models of integral sheet metal design products with higher order bifurcations based on a low-level 3D-kernel. The emphasis is placed on two aspects, namely the processing of the model’s topology and geometry as well as the software implementation. First, a methodology for the generation and manipulation of the geometry and topology of the Boundary Representation (B-Rep) structure is proposed. This methodology is integrated into an algorithm-based product design approach, which enables engineers to plan and design their complete draft for bifurcated sheet metal parts in an automated, computer aided way. Further functionalities to support the subsequent manufacturing process are developed and integrated. The idea is then implemented by developing a 3D-CAD application using the B-Rep CAD-kernel Parasolid. The programming framework. NET has been chosen for the development of the software on a Windows NT platform using the object-oriented C++ and C# programming languages. The work presented here has significant implications on the quality, accurateness and efficiency of the product generation process of sheet metal products with higher order bifurcations.

Creation of Models of Fan Blades According to Airfoil Measurements

2020 ◽  
Author(s):  
Alexandr N. Arkhipov ◽  
Yury A. Ravikovich ◽  
Dmitry P. Kholobtsev
Keyword(s):  
Complex Geometry ◽  
Three Dimensional ◽  
3D Models ◽  
Cad System ◽  
Operating Modes ◽  
Geometric Deviations ◽  
Working Together ◽  
Subsequent Calculation ◽  
Fan Blade ◽  
3D Methods

Abstract One of the main parts of the engine for the regional aircraft, affecting its efficiency and reliability, is the fan blade, which is designed based on aerodynamic and mechanical integrity (MI) optimization and has a complex geometry of the airfoil. At some operating modes, the aerodynamic and MI characteristics of the blades may deteriorate due to geometric deviations from the nominal airfoil at manufacture. Thus, to increase the robustness of the fan blades, it is necessary to solve the problem of creation of the fan blade models and the arrangement of the blades in the wheel, taking into account the actual geometric parameters. Aerodynamic and MI calculations of blades with real geometric deviations of the airfoil should be carried out using numerical three-dimensional (3D) methods. In this case, it is important to create 3D models of blades and to carry out their subsequent calculation at minimal costs. The method of automated creation of a model of finished blades with real production deviations of the airfoil according to the data of measurement in the CAD system is presented. Since more than 1000 measured points are used in the construction of the model of the measured blade, it is more convenient to reduce the number of initial points (parameters) for robust optimization of the fan blades. A program has been developed, which is a macro written in the programming language PHYTON, working together with the selected CAD-system Siemens NX, which significantly reduces the time to prepare models for aerodynamic and MI calculations.

CAD/FEM Analysis of Teeth Contact Stress and Load Share in Face Gears

2001 ◽  
Author(s):  
Sandro Barone ◽  
Paola Forte ◽  
Leonardo Borgianni
Keyword(s):  
Finite Element Analysis ◽  
Complex Geometry ◽  
Fem Analysis ◽  
3D Models ◽  
Face Gear ◽  
Element Analysis ◽  
Contact Algorithm ◽  
3D Cad ◽  
Cad System ◽  
Gear Drives

Abstract Face gear drives have many advantageous characteristics compared to other angular transmissions but their complex geometry makes their design difficult with common approaches. This work is aimed at investigating the stress state of the teeth of a face gear and the mating pinion by integrating a 3D CAD system and a FEA code, and by simulating the meshing of a pinion and gear three teeth sector using contact elements and an automated contact algorithm. The procedures followed to create the 3D models of teeth in mesh are described and finite element analysis results are discussed.

Virtual Engineering: A Vision of the Next-Generation Product Realization Using Virtual Reality Technologies

2004 ◽  
Author(s):  
Angran Xiao ◽  
Kenneth Mark Bryden
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Engineering System ◽  
Product Model ◽  
Implementation Framework ◽  
Virtual Engineering ◽  
Complex Information ◽  
Fermentation Tank ◽  
Product Realization ◽  
Virtual Product

The dynamic and changing nature of the modern marketplace requires product development engineers to quickly perceive and understand the developed product, including its geometric features and physical characteristics. Virtual reality (VR) technology is capable of constructing a user-centered, three-dimensional environment in which abstract and complex information is visualized in an intuitive and realistic manner, hence becoming an efficacious tool for product realization. However, in most current applications, VR is only used as a visualization tool for showing geometry shapes and engineering analysis results. In this paper, we discuss virtual engineering, which expands the application scope of VR to the integration of virtual product model with analysis, simulation, decision making and other engineering tools into a virtual product realization environment that facilitates multidisciplinary and collaborative product realization among distributed engineers. In this paper, we present the implementation framework of a virtual engineering system and introduce our current work at developing this system. That is, we introduce VE-Suite, an extensible, cross-platform, open source library of tools that enable product realization in a virtual environment. Its functions and capabilities are demonstrated using a virtual fermentation tank used in biotechnology industry. Finally we raise a set of key research questions as a guideline for the further research and realization of virtual engineering.

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