Research and Application of NURBS Surface Modeling Technique in Computer Aided Industrial Design

2011 ◽  
Vol 121-126 ◽  
pp. 3461-3465
Author(s):  
Bo Zhao ◽  
Ping Ai
Keyword(s):  
Industrial Design ◽  
Surface Modeling ◽  
Modeling Technique ◽  
Practical Application ◽  
Nurbs Surface ◽  
Application Process ◽  
Product Models ◽  
Computer Aided ◽  
Hard Problems ◽  
The Common

NURBS surface modeling technique is an important part of computer aided industrial design(CAID), and surface modeling has much advantage. This thesis bases on the statistics and comparison of current CAID practical application methods and techniques, concludes the common CAID techniques, the thinking methods and application process of surface categorization in surface modeling from the basic theory of NURBS surface modeling; and together with concrete cases, this thesis also proposes an solution for the common hard problems in the process of using NURBS technique to build 3D product models.

A Survey of Computer-Aided Modeling Tools for Aesthetic Design

2002 ◽  
Vol 2 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Chiara Eva Catalano ◽  
Bianca Falcidieno ◽  
Franca Giannini ◽  
Marina Monti
Keyword(s):  
Industrial Design ◽  
Surface Modeling ◽  
Modeling Tools ◽  
Aesthetic Design ◽  
Computer Aided ◽  
Critical Issues ◽  
Key Issues ◽  
European Projects ◽  
Industrial Designers

The goal of this paper is to discuss the key issues in the computer-aided surface modeling tools used in the industrial aesthetic design workflow and to highlight the problems that still make styling activities difficult. Based on the experience gained while working on two different European projects, with the collaboration of industrial designers of different fields, a general industrial design workflow is illustrated, pointing out the main differences between the automotive and non-automotive sectors. Among the emerged critical issues, particular emphasis is given to the high request of tools more suitable for the mentality of creative users; short research surveys aimed to meet this request are included, and finally authors indicate a branch of research in which they are investigating and they consider particularly worth exploring further.

scholarly journals SURFACE MODELING FOR CAD/CAM BASED ON NURBS

2011 ◽  
Vol 14 (4) ◽  
pp. 44-52
Author(s):  
Hien Tat Le ◽  
Hung Xuan Nguyen ◽  
Cang Trong Vo
Keyword(s):  
Computer Aided Design ◽  
Geometric Modeling ◽  
Surface Modeling ◽  
Digital Design ◽  
Nurbs Surface ◽  
Computer Aided ◽  
Modeling Techniques ◽  
Cad Cam ◽  
Numerical Performance ◽  
Aided Design

In the digital design process, surface modeling is required to be as accurate as possible for the effective support of production as well as for numerical performance analysis. This article reviews the geometric modeling techniques, based on non-uniform rational B-spline (NURBS). The NURBS surface can be readily translated into many CAD/CAM packages (Computer Aided Design/Computer Aided Manufacturing), which is more convenient for visualization performance and finite element methods.

Green Design and Manufacturing Technology on Hoisting Device of the Silt Coal Car Loader

2011 ◽  
Vol 328-330 ◽  
pp. 220-223
Author(s):  
Ping Huai Mao ◽  
Run Dong Chen ◽  
Bing Zhai
Keyword(s):  
Science And Technology ◽  
Manufacturing Technology ◽  
Design Concept ◽  
Green Design ◽  
Practical Application ◽  
Working Process ◽  
Manufacturing Technique ◽  
Design And Manufacturing ◽  
The Common ◽  
Working Device

This paper analyzes the common faults of the YMZ light silt coal car loader's hoisting device in working process, and supplies several solutions; Simultaneously, it mainly introduces two types of manufacturing technique about hoisting device's parts design and improvement in practical application and appraises the effect of the green design and manufacturing technique in the working device; The article concludes that improved workpiece performance is of great practical value; As the designers are designing the products, only when they should combine the new design concept and the mode of thinking with the green design concept, and attach importance to the innovation of science and technology during the designing process as well, and finally bring into play the advantages of the technology, can they produce safe, powerfrugal, efficient and shapely green products which are popular with people at home and abroad.

scholarly journals Use of Reverse Engineering and Additive Printing in the Reconstruction of Gears

2020 ◽  
Vol 3 (1) ◽  
pp. 274-284
Author(s):  
Dorota Palka
Keyword(s):  
3D Printing ◽  
Reverse Engineering ◽  
Fused Deposition Modeling ◽  
Rapid Development ◽  
Spare Parts ◽  
Common Element ◽  
Practical Application ◽  
Computer Aided Manufacturing ◽  
Fused Deposition ◽  
Computer Aided

AbstractDespite the very rapid technological development, the general concept of mechanical devices has not changed. Still, the most common element of these devices are gears, whose range of use is very wide. There are both technological and historical considerations for the reconstruction of gears and other elements. In particular, this applies to spare parts for technical facilities that are not available on the market or service costs are too high. Contemporary reconstruction is called Reverse Engineering, which offers tools that allow transformation of an existing object through a virtual model into the final real product. Modern production engineering is based on innovative CAD – Computer Aided Designed design methods and computer-aided manufacturing technologies, CAM – Computer Aided Manufacturing. The rapid development of 3D CAD systems has led to the development of solutions to obtain the designed object, already at the development stage. Such a solution is the Rapid Prototyping method, designed for fast, precise and repeatable production of machine components. Widespread use and growing interest in the use of additive printing influenced the development of this technology. The purpose of the article is to present the practical application of the Reverse Engineering method and 3D printing in the reconstruction of gears. The object of research is the real gear, which has been reconstructed using Reverse Engineering and 3D printing. The article presents the basic assumptions of the methods used and the methodology for conducting reconstruction work. FDM (Fused Deposition Modeling) technology was used for the research. The results obtained are a real example of the practical application of the presented methods. At the same time, they create great opportunities for their wider use.

A Simple Practical Criterion to Guarantee Second Order Smoothness of Blend Surfaces

1989 ◽  
Author(s):  
J. Pegna ◽  
F.-E. Wolter
Keyword(s):  
Second Order ◽  
Geometric Design ◽  
Computer Aided Geometric Design ◽  
Common Boundary ◽  
First Order ◽  
Computer Aided ◽  
The Common ◽  
Blend Surfaces ◽  
Continuous Curves ◽  
Order Smoothness

Abstract Computer Aided Geometric Design of surfaces sometimes presents problems that were not envisioned by mathematicians in differential geometry. This paper presents mathematical results that pertain to the design of second order smooth blending surfaces. Second order smoothness normally requires that normal curvatures agree along all tangent directions at all points of the common boundary of two patches, called the linkage curve. The Linkage Curve Theorem proved here shows that, for the blend to be second order smooth when it is already first order smooth, it is sufficient that normal curvatures agree in one direction other than the tangent to a first order continuous linkage curve. This result is significant for it substantiates earlier works in computer aided geometric design. It also offers simple practical means of generating second order blends for it reduces the dimensionality of the problem to that of curve fairing, and is well adapted to a formulation of the blend surface using sweeps. From a theoretical viewpoint, it is remarkable that one can generate second order smooth blends with the assumption that the linkage curve is only first order smooth. This property may be helpful to the designer since linkage curves can be constructed from low order piecewise continuous curves.

CAFP: Computer-Aided Fixture Planning

1993 ◽  
Author(s):  
Jerry Y. Fuh ◽  
Chao-Hwa Chang ◽  
Michel A. Melkanoff ◽  
Hsin Rau
Keyword(s):  
Process Planning ◽  
Rational Approach ◽  
Machining Processes ◽  
Constraint Equations ◽  
Cad System ◽  
Manufacturing Process Planning ◽  
Modular Fixtures ◽  
Fixture Planning ◽  
Computer Aided ◽  
The Common

Abstract Fixture planning is an indispensable part of a manufacturing process planning routine. This paper introduces a rational approach to computer-aided fixture planning (CAFP). A method of fixture classification and selection is introduced for planning of modular fixtures. The location of each fixture component is determined according to the common fixturing principles. We has developed a prototype CAFP system and linked to a commercial CAD system, namely CADAM. Modular fixture elements are automatically selected by the system, and the generated fixture layout can be displayed on-screen after assembly. For verification and optimization of a fixturing scheme, a fixture analysis module is also developed. An iteration method is used to solve the fixturing constraint equations and to determine the adequate clamping forces for holding the workpiece during machining processes.

Analyses of kinematics, statics, and workspace of a 3-RRPRR parallel manipulator and its three isomeric mechanisms

2008 ◽  
Vol 222 (9) ◽  
pp. 1829-1837 ◽  
Author(s):  
B Hu ◽  
Y Lu
Keyword(s):  
Computer Aided Design ◽  
Parallel Manipulator ◽  
Analytical Approach ◽  
Displacement Velocity ◽  
Active Force ◽  
Kinematic Characteristics ◽  
Computer Aided ◽  
Analytical Formulae ◽  
The Common ◽  
Aided Design

A novel 3-RRPRR parallel manipulator with three pure translational movements and a relative larger workspace is proposed. Its three isomeric mechanisms 3-RR PU, 3-R PRU, and 3-U PU with three pure translational movements are constructed by varying dimensions of some links. Their common kinematic characteristics, workspace, and singularity are analysed, the active force and the constrained torque are solved. First, a simulation mechanism of the 3-RR PRR manipulator is created, and its kinematics, singularity, and workspace are analysed by using an analytical approach and a computer-aided design (CAD) variation geometry approach. Second, the common analytical formulae for solving the displacement, velocity, and acceleration of the four manipulators are derived. Third, the formulae for solving the active forces and constrained torques of the 3-RR PRR manipulator are derived. The analytic-solved results are verified by their simulation mechanisms.

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