Automatic Dimensioning From 3D Solid Model With Feature Extraction

1990 ◽  
Author(s):  
Je Hwan Oh ◽  
Kunwoo Lee
Keyword(s):  
Feature Extraction ◽  
Solid Model ◽  
Linked List ◽  
Engineering Drawings ◽  
3D Solid ◽  
Automatic Dimensioning

Abstract A scheme for automatic dimensioning of a part created by B-rep based modeling system is presented. Since size dimensions and location dimensions are required for defining part features in engineering drawings, part features are extracted first from a B-rep model for the automatic dimensioning. Faces which constitute a feature are found in two steps: the first by the edge-initiated approach and the second by the boundary-initiated approach. The recognized features are stored in a graph whose nodes are feature faces and edges represent their connections. Once all the features are recognized, a linked list of identification points, called a dimension link, is generated automatically for each direction of dimensioning the part. Then, size and location dimensions of the part features are directly created from the dimension link and placed on the most descriptive view.

Rendering 3D Solid Model

2015 ◽  
pp. 309-316 ◽  
Author(s):  
Cheng-Wei Huang ◽  
Ran-Zan Wang ◽  
Shang-Kuan Chen ◽  
Wen-Pin Fang
Keyword(s):  
Solid Model ◽  
3D Solid

scholarly journals TOWARDS A DIGITAL TWIN OF A STORAGE TANK USING LASER SCAN DATA

2021 ◽  
Vol XLVI-4/W4-2021 ◽  
pp. 119-124
Author(s):  
L. Truong-Hong ◽  
N. Nguyen ◽  
R. Lindenbergh ◽  
P. Fisk ◽  
T. Huynh
Keyword(s):  
Data Storage ◽  
Storage Tank ◽  
Laser Scanning ◽  
Point Clouds ◽  
Solid Model ◽  
Shell Wall ◽  
Digital Twin ◽  
Oil Storage ◽  
Oil Storage Tank ◽  
3D Solid

Abstract. This paper proposes a methodology to automatically extract components of an oil storage tank from terrestrial laser scanning (TLS) point clouds, and subsequently to create a three-dimensional (3D) solid model of the tank for numerical simulation. The proposed method is integrated into a smart analysis layer of a digital twin platform consisting of three main layers: (1) smart analysis, (2) data storage, and (3) visualisation and user interaction. In this proposed method, primary components of the tank were automatically extracted in a consecutive order from a shell wall to roof and floor. Voxel-based RANSAC is employed to extract voxels containing point clouds of the shell wall, while a valley-peak-valley pattern based on kernel density estimation is implemented to remove outlier points within voxels representing to the shell wall and re-extract data points within voxels adjoined to the shell wall. Moreover, octree-based region growing is employed to extract a roof and floor from remaining point clouds. An experimental showed that the proposed framework successfully extracted all primary components of the tank and created a 3D solid model of the tank automatically. Resulting point clouds of the shell wall were directly used for estimating deformation and a 3D solid model was imported into finite element analysis (FEA) software to assess the tank in terms of stress-strain. The demonstration shows that TLS point clouds can play an important role in developing the digital twin of the oil storage tank.

Automatic Recognition of Multi-Axis Machining Features Based on Machining Process from 3D Solid Model

2015 ◽  
Vol 789-790 ◽  
pp. 873-877 ◽  
Author(s):  
Phung Xuan Lan ◽  
Hoang Vinh Sinh
Keyword(s):  
Automatic Recognition ◽  
Machining Process ◽  
Solid Model ◽  
Machining Features ◽  
Rule Based ◽  
Machining Feature ◽  
Complex Design ◽  
3D Solid ◽  
The Relationship

This paper presents an effective rule-based method for extracting and recognizing the machining features from 3D solid model. The machining feature is automatically recognized while considering the relationship between machining feature and machining process. This proposed method is capable of recognizing not only prismatic machining features but also multi-axis machining features from many kinds of complex design features in both protrusion and depression. It also succeeds in recognizing various types of interaction in a uniform way. The capability of the proposed method is demonstrated in one specific case study.

scholarly journals Studying and Generation of Saffron Flower's 3D Solid Model

2015 ◽  
Vol 19 ◽  
pp. 62-69 ◽  
Author(s):  
Mojtaba Zeraatkar ◽  
Khalil Khalili ◽  
Abolfazl Foorginejad
Keyword(s):  
Solid Model ◽  
3D Solid

Geometric Assistance for the Construction of Non-Polyhedral Solids From Orthographic Views

1997 ◽  
Author(s):  
Carol Hubbard ◽  
Yong Se Kim
Keyword(s):  
Computer Graphics ◽  
Solid Model ◽  
Geometric Framework ◽  
Mechanical Parts ◽  
Interactive Computer Graphics ◽  
Mechanical Part ◽  
Solid Models ◽  
Spherical Surfaces ◽  
Rapid Construction ◽  
Engineering Drawings

Abstract As the extensive use of solid models becomes widespread, it is important to have a mechanism by which existing engineering drawings can be converted into solid models. Therefore, a geometric assistant which can aid in the construction of solid models is beneficial. In this paper, we present key operations for a system called the Assistant for the Rapid Construction of Solids (ARCS), that provides this assistance given a set of two orthographic views. ARCS is based on the Visual Reasoning Tutor (VRT), a system we developed that provides users with the geometric framework to build polyhedral solids from their orthographic views. However, the geometric domain of ARCS encompasses non-polyhedral solids with cylindrical and spherical surfaces, such as those found in typical mechanical parts. We have devised the Cylindrical and Spherical Warping operations to create cylindrical and spherical surfaces, which use interactive computer graphics that guide a human user to build non-polyhedral faces of a solid. These operations are then illustrated with an example using ARCS to create the solid model of a typical mechanical part from its orthographic projections.

Responses of Aluminium Alloy Pistons under Mechanical and Thermal Loads

2019 ◽  
Vol 969 ◽  
pp. 231-236
Author(s):  
Chandan Kumar ◽  
Nilamber Kumar Singh
Keyword(s):  
Thermal Analysis ◽  
Combustion Engine ◽  
Topological Optimization ◽  
Solid Model ◽  
Thermal Loads ◽  
Transient Thermal Analysis ◽  
Critical Areas ◽  
Temperature Distributions ◽  
Transient Thermal ◽  
3D Solid

A comparative study of three different aluminium alloys, Al2618, Al4032 and Al6061 made internal combustion engine pistons is done on their responses under mechanical and thermal loads using finite element methods. In this study, a 3D solid model of piston is created in CATIA and the simulations of the static structural analysis, steady-state thermal analysis and transient thermal analysis are carried out in ANSYS. Stress and temperature distributions on critical areas of piston are pointed out for appropriate modification in piston design. The temperature and heat flux variations with time are presented in transient thermal analysis. Taguchi method and topological optimization are applied to optimize the process parameters and to select the appropriate material for the piston.

A New Approach to Reconstructing 3D Solid from the Two 2D Views Based on AutoCAD

2011 ◽  
Vol 88-89 ◽  
pp. 697-702
Author(s):  
Hong Sheng Zhao ◽  
Ya Xian Wu ◽  
Yun Zhen Wu
Keyword(s):  
Research Work ◽  
Special Kind ◽  
Basic Knowledge ◽  
Solid Model ◽  
Engineering Drawing ◽  
Theoretical Possibility ◽  
New Approach ◽  
Simple Operation ◽  
High Efficient ◽  
3D Solid

This paper presents a new approach to reconstructing 3D solid model from the two given 2D orthographic views based on AutoCAD, which is much more effective and high efficient for a special kind of compound object than the currently existing ways. The approach emphasizes integrated operating of AutoCAD software and basic knowledge of engineering drawing with no needs for complicated computation and 3D rich imagination and reconstruction. Using this approach, the 3D solid model can be reconstructed effectively and efficiently from the two given 2D orthographic views by several steps of simple operation on computer on the basis of judgment. The research work provides a theoretical possibility for the automatic reconstruction of 3D Solid model of such compound objects, and a simple and practical 3D solid model-reconstructing method for engineers and learners of engineering drawing.

Cutter Engagement Feature Extraction by Using Dexel Representation Solid Model

2012 ◽  
Vol 523-524 ◽  
pp. 420-432 ◽  
Author(s):  
Masatomo Inui ◽  
Nobuyuki Umezu
Keyword(s):  
Feature Extraction ◽  
Cutting Force ◽  
Metal Cutting ◽  
Experimental System ◽  
Simulation Method ◽  
Milling Process ◽  
Solid Model ◽  
Small Motion ◽  
Nc Milling ◽  
Feature Based

Computer simulation of the cutting force change in a milling process is important for realizing more stable, precise, and efficient metal cutting. In the latest cutting force simulation method, a cutter engagement feature representing a contact area between the milling cutter and the workpiece must be extracted for each small motion of the cutter. In this paper, a new algorithm is proposed for computing a cutter engagement feature based on the dexel representation of the workpiece. Most prior studies compute the feature based on the cutter removal volume of the workpiece. Differently from them, our technology to propose computes the cutter engagement feature based on the contact analysis between the cutter and dexels representing the workpiece shape. An experimental system is implemented and some computational experiments are performed. Our system can achieve the total cutter engagement feature extraction of a complex 3-axis NC milling process in a few minutes.

Internet Based Framework to Perform Automated FEA on User Customized Products

2003 ◽  
Author(s):  
Zahed Siddique ◽  
Jiju A. Ninan
Keyword(s):  
Product Family ◽  
Solid Model ◽  
Product Families ◽  
Analysis And Evaluation ◽  
The Past ◽  
Evaluation Of Performance ◽  
Internet Users ◽  
Solid Models ◽  
3D Solid ◽  
Fea Analysis

Designing family of products require analysis and evaluation of performance for the entire product family. In the past, products were mainly mass-produced hence the use of CAD/CAE was restricted to developing and analyzing individual products. Since the products offered using a platform approach include a variety of products built upon a common platform, CAD/CAE tools need to be explored further to assist in customization of products according to the customer needs. In this paper we investigate the development of a Product Family FEA (PFFEA) module that can support FEA analysis of user customized product families members. Customer specifications for family members are gathered using the internet, users are allowed to scale and change configurations of products. These specifications are then used to automatically generate 3D solid models of the product and then perform FEA to determine feasibility of the customer specified product. In this paper, development of the PFFEA module is illustrated using a family of lawn trimmer and edger. The PFFEA module uses Pro/E to generate the solid model and ANSYS as the base FEA software.

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