Partial matching algorithm of 3D CAD model based on topoisomerase

This paper presents an algorithm for matching similar sub-parts of 3D CAD models. The matching process is based on the attributed graphs. Each model in target object database is represented by attributed graph. The sub-part, which is to be retrieved, is selected interactively by users from a 3D CAD model described by boundary representation (B-Rep) and its attributed graph is automatically generated. For each target CAD model in the database, its surfaces which are similar to those surfaces of the query sub-part are identified by means of the attributes. Then, other irrelevant surfaces of the target object are deleted from the model’s attributed graph. Thus, the parts that are possibly similar to the query sub-part are separated from the target model. A method for calculating the similarity coefficient between the separated part and the sub-part, which uses an optimal matching algorithm for bi-graphs, is proposed. Experimental results show that this algorithm can efficiently achieve partial retrieval.

Download Full-text

APPLYING THE ISF TECHNOLOGY TO PRODUCE THE CAR PART MODELS

Science and Technology Development Journal ◽

10.32508/stdj.v13i4.2181 ◽

2010 ◽

Vol 13 (4) ◽

pp. 91-98

Author(s):

Tuan Dinh Phan ◽

Binh Thien Nguyen ◽

Dien Khanh Le ◽

Phuong Hoang Pham

Keyword(s):

Rapid Prototyping ◽

Incremental Sheet Forming ◽

Cad Model ◽

Post Processing ◽

Technological Parameters ◽

Batch Production ◽

Complex Products ◽

3D Cad ◽

Real Size ◽

Single Batch

The paper presents an application the research results previously done by group on the influence of technological parameters to the deformation angle and finish surface quality in order to choose technology parameters for the incremental sheet forming (ISF) process to produce products for the purpose of rapid prototyping or single-batch production, including all steps from design and process 3D CAD model, calculate and select the technological parameters, setting up manufacturing and the stage of post-processing. The samples formed successfully showed high applicability of this technology to practical work, the complex products with the real size can be produced in industries: automotive, motorcycle, civil...

Download Full-text

Automatized Evaluation of Students’ CAD Models

Education Sciences ◽

10.3390/educsci11040145 ◽

2021 ◽

Vol 11 (4) ◽

pp. 145

Author(s):

Nenad Bojcetic ◽

Filip Valjak ◽

Dragan Zezelj ◽

Tomislav Martinec

Keyword(s):

Computer Aided Design ◽

Three Dimensional ◽

Computer Application ◽

Test Cases ◽

Cad Model ◽

Computer Solution ◽

3D Cad ◽

Computer Aided ◽

Cad Models ◽

Aided Design

The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.

Download Full-text

Modeling in ADAMS of a 6R industrial robot

MATEC Web of Conferences ◽

10.1051/matecconf/201818402006 ◽

2018 ◽

Vol 184 ◽

pp. 02006

Author(s):

Mariana Ratiu ◽

Alexandru Rus ◽

Monica Loredana Balas

Keyword(s):

Dynamic Analysis ◽

Industrial Robot ◽

Kinematic Model ◽

Future Research ◽

Robot Motion ◽

Cad Model ◽

3D Cad ◽

Revolute Joints ◽

Real Model ◽

Articulated Robot

In this paper, we present the first steps in the process of the modeling in ADAMS MBS of MSC software of the mechanical system of an articulated robot, with six revolute joints. The geometric 3D CAD model of the robot, identical to the real model, in the PARASOLID format, is imported into ADAMS/View and then are presented the necessary steps for building the kinematic model of the robot. We conducted this work, in order to help us in our future research, which will consist of kinematic and dynamic analysis and optimization of the robot motion.

Download Full-text