scholarly journals Deterministic mathematical morphology for CAD/CAM

2014 ◽  
Vol 31 (7) ◽  
pp. 1221-1241 ◽  
Author(s):  
Rubén Sarabia-Pérez ◽  
Antonio Jimeno-Morenilla ◽  
Rafael Molina-Carmona
Keyword(s):  
Mathematical Morphology ◽  
Geometric Model ◽  
Three Dimensional ◽  
Morphological Operations ◽  
Basic Operation ◽  
Geometric Data Structures ◽  
Content Type ◽  
Morphological Operators ◽  
Cad Cam ◽  
Definition Of

Purpose – The purpose of this paper is to present a new geometric model based on the mathematical morphology paradigm, specialized to provide determinism to the classic morphological operations. The determinism is needed to model dynamic processes that require an order of application, as is the case for designing and manufacturing objects in CAD/CAM environments. Design/methodology/approach – The basic trajectory-based operation is the basis of the proposed morphological specialization. This operation allows the definition of morphological operators that obtain sequentially ordered sets of points from the boundary of the target objects, inexistent determinism in the classical morphological paradigm. From this basic operation, the complete set of morphological operators is redefined, incorporating the concept of boundary and determinism: trajectory-based erosion and dilation, and other morphological filtering operations. Findings – This new morphological framework allows the definition of complex three-dimensional objects, providing arithmetical support to generating machining trajectories, one of the most complex problems currently occurring in CAD/CAM. Originality/value – The model proposes the integration of the processes of design and manufacture, so that it avoids the problems of accuracy and integrity that present other classic geometric models that divide these processes in two phases. Furthermore, the morphological operative is based on points sets, so the geometric data structures and the operations are intrinsically simple and efficient. Another important value that no excessive computational resources are needed, because only the points in the boundary are processed.

Research and Development of UG-Based CAD/ CAM System for Turbine Blade

2011 ◽  
Vol 201-203 ◽  
pp. 215-219
Author(s):  
Fang Jie Ren ◽  
Shi Quan Zhou ◽  
Jian Li ◽  
Zhi Qian Wan ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Research And Development ◽  
Geometric Model ◽  
Three Dimensional ◽  
Cnc Machining ◽  
Design Efficiency ◽  
Machining Center ◽  
Cad Cam ◽  
Database Technology ◽  
Open Api ◽  
Cnc Machining Center

A CAD/ CAM system has been developed for turbine blade’s manufacturing based on the software of UG in accordance with a type of static blade of China Chang Jiang Energy Corp. (Group) in this paper. According to a few parameters input by users, the system automatically generate three-dimensional geometric model of the blade, and through its CAM module, it automatically generates the CNC track for four-axis CNC machining center. A management system has been developed by using UG / Open API, MFC, and database technology so as to improving the design efficiency in the UG.

Development of bulletproof pad design system using 3D body scan data

2019 ◽  
Vol 31 (6) ◽  
pp. 802-812
Author(s):  
Yeong Hoon Kang ◽  
Sungmin Kim
Keyword(s):  
Three Dimensional ◽  
Upper Body ◽  
Design System ◽  
Standard Normal Distribution ◽  
Shape Modification ◽  
Body Scan ◽  
Content Type ◽  
Standard Normal ◽  
Scan Data ◽  
Definition Of

Purpose The purpose of this paper is to develop a system to design a bulletproof pad for chest protection using three-dimensional body scan data. Design/methodology/approach Body data were divided into arbitrary number of groups based on the standard normal distribution theory, considering the width and height of the upper body. Several parameters were used to define the cover area of the bulletproof pad, and the shape of this area of each model in a group was averaged to generate the standard bulletproof pad model for that group. Findings It is possible to use three-dimensional body scan data in the design process of a mass-customized bulletproof pad for chest protection. Practical implications It is expected that it would be possible to design not only bulletproof pad but also many kinds of body-related products that need to reflect the shape of body using the methodology developed in this study. Social implications Using this system, the mass customization of special garments and equipment would be possible, which will improve the wearers’ comfort and work efficiency. Originality/value Three-dimensional body measurement, parametric definition of cover area and user interface for shape modification developed in this study will facilitate the consumer-oriented product design.

Problematic of ideological formation in Kazakhstan: three-dimensional practice of the Muftiate as an ideological state apparatus (an Althusserian analysis)

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yerkesh Kozhbankhan ◽  
Aidana Kaldybekova
Keyword(s):  
National Policy ◽  
Three Dimensional ◽  
Social Engineering ◽  
Historical Background ◽  
Content Type ◽  
Louis Althusser ◽  
State Apparatus ◽  
Restructuring Process ◽  
Definition Of

Purpose In the Kazakhstani context, the instrumentalization of the Muftiate as a social engineering tool is particularly pertinent, as it stands out as a unique channel for the political, moral and cultural shaping of Muslims. This study aims to outline the role of the Muftiate, its historical background and recent restructuring process. It focuses on the ideological practices and religious discourses of the Muftiate. Design/methodology/approach In Kazakhstan, as a result of reforms in the religious sphere, which were started in 2011, the scope of activity of the Spiritual Administration of Muslims of Kazakhstan (the Muftiate) has entered a new phase and become an important ideological tool within national policy. It has emerged as a civil society institution that will centralize the process of Islamization and instrumentalize the importance of Islam to create a new fantasy of unity and solidarity. Findings Thus, it discusses how Muftiate fabricates the correct forms of action and the correct form of thought. The theory of “ideological state apparatuses” (ISA) of the French philosopher Louis Althusser should be considered as a theoretical framework of this study. This approach not only gives a theoretical definition of the Muftiate but also allows us to determine its position in society and outline three different dimensions of the practice that it performs. Originality/value The study demonstrates how the Muftiate as an ISA actualizes various concepts, ideas, beliefs or images in which Muslims live their imaginary relations to the real world and transforms Muslim individuals into ideological subjects, thus enabling them to become apparently free bearers of the ideology.

Automated FE Analysis for Heat Sink of LED Modules

2013 ◽  
Vol 302 ◽  
pp. 765-771 ◽  
Author(s):  
Joon Seong Lee ◽  
Dong Keun Park ◽  
Youn Jong Choi
Keyword(s):  
Heat Sink ◽  
Geometric Model ◽  
Three Dimensional ◽  
Fe Analysis ◽  
Present System ◽  
Analysis Model ◽  
Solid Geometry ◽  
Analysis System ◽  
Definition Of ◽  
Interactive Operations

This paper describes an automatic finite element (FE) mesh generation for FE analysis of LED modules. It is consisting of element generation, bubble packing and solid geometry modeler. This automated FE analysis system including bubble packing method consists of three sub-processes: (a) definition of geometric model, i.e. analysis model, (b) generation of bubbles, and (c) generation of elements. One of commercial solid modelers is employed for three-dimensional solid structures. Bubble is generated if its distance from existing bubble points is similar to the bubble spacing function at the point. The Delaunay method is introduced as a basic tool for element generation. The developed system allows designers to evaluate detailed physical behaviors of structures through some simple interactive operations to their geometry models. To demonstrate practical performances of the present system, the system was used to an analysis of heat sink. Practical performances of the present system are demonstrated through several examples for heat sink of LED modules.

Mathematical Morphology in Multi-Dexel Representation

2009 ◽  
Author(s):  
Wei Zhao ◽  
Xiaoping Qian
Keyword(s):  
Mathematical Morphology ◽  
Three Dimensional ◽  
Spatial Relationship ◽  
Noise Removal ◽  
Theoretic Approach ◽  
Three Dimension ◽  
Three Dimensional Objects ◽  
Set Operations ◽  
Part Surface ◽  
Definition Of

Mathematical morphology provides a set-theoretic approach for spatial structure analysis and is particularly useful for describing the spatial relationship between a tool under motion and the part surface. However, its usage in three-dimension has so far been limited in part due to its computational complexity. This paper presents a multi-dexel based computer implementation of morphology operations. Three dimensional objects (tools and parts) are represented as collections of dexels (depth elements) in multiple directions. Morphology operations such as dilation and erosion are then converted to a series of 1D set operations in each direction. We show that our definition of multi-dexel is formal and our implementation is complete. We present our implementation results on three morphological applications: AFM image simulation, noise removal in 3D mesh, and NC path generation.

scholarly journals A role for industrial looms in craft research

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Kathryn Walters
Keyword(s):  
Experimental Design ◽  
Research Methods ◽  
Experimental Work ◽  
Design Research ◽  
Three Dimensional ◽  
Cad Cam ◽  
Textile Forming ◽  
Automated Tools ◽  
Definition Of ◽  
Tools And Techniques

As a definition of craft practice, the workmanship of risk emphasises the judgement and skill of the crafter, as they engage with materials, tools, and techniques to produce artefacts. Through experimental design research methods, self-forming three-dimensional textiles were created with the aim to develop both the use of digital and automated tools for weaving, and language to describe the process of textural forming in weaving when hand and machine meet. Examples of experimental work illustrate the potential of industrial looms as tools for crafting complex textile systems and expressions. The results include a method for crafting at the intersection of the workmanship of risk and CAD/CAM, providing a framework for this hybrid practice, while a new language of textile forming for craft including industrial and CAD/CAM tools emerges.

An Automatic Technique for CAE Analysis With a 3D-CAD Model

2002 ◽  
Author(s):  
Norihiko Nonaka ◽  
Ichirou Nishigaki
Keyword(s):  
Computer Aided Design ◽  
Geometric Model ◽  
Three Dimensional ◽  
Analysis Time ◽  
Cad Model ◽  
3D Cad ◽  
Computer Aided ◽  
Cae Analysis ◽  
Analysis System ◽  
Definition Of

A CAE (computer-aided engineering) analysis system, consisting of a 3D-CAD (three-dimensional computer-aided design) modeler, a pre-processor, an analysis solver, and a post-processor, was developed. This system uses automated procedures for solid modeling, definition of analysis models (i.e., defining boundary conditions and material properties, traditionally done manually), mesh generation, numerical simulation, and visualization of results. The CAE analysis system has two key features: it can greatly reduce the analysis time, and it uses a 3D-CAD model as the geometric model for numerical analysis. It was found that the developed automatic system reduces the analysis time by 50% compared with that for manual operation.

Geometry Information Extraction from the STEP Neutral File

2012 ◽  
Vol 433-440 ◽  
pp. 3158-3162
Author(s):  
Hai Peng Pan ◽  
Hao Feng
Keyword(s):  
Geometric Model ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Dynamic Link Library ◽  
Systematic Analysis ◽  
Geometry Model ◽  
Key Technologies ◽  
Cad Cam ◽  
Dynamic Link

It is one of the key technologies for the integration of CAD/CAM/CAPP to extract the geometric model information. Based on a systematic analysis and comprehension on the expression of STEP geometry model, the map between EXPRESS and C++ was studied. The module of map has been developed as a dynamic link library, which facilitated the expansion of system. In order to ensure the coherence and availability of collected data, a module for data acquisition has also been designed. The reading and analysis for STEP neutral file has been realized so that the geometry information in the STEP-based three-dimensional model could be extracted. Application illustration, which is used for supporting the slicing process in rapid prototyping, has been also presented. The method put forward in the paper is conducive to the integration of different CAX systems.

Gratitude in service encounters: implications for building loyalty

2016 ◽  
Vol 30 (3) ◽  
pp. 341-358 ◽  
Author(s):  
Dora Elizabeth Bock ◽  
Judith Anne Garretson Folse ◽  
William C. Black
Keyword(s):  
Three Dimensional ◽  
Predictive Ability ◽  
Service Encounters ◽  
Content Type ◽  
Quantitative Studies ◽  
Relationship Continuity ◽  
Mediating Mechanisms ◽  
Relational Outcomes ◽  
Antecedents And Consequences ◽  
Definition Of

Purpose While research on customer gratitude is gaining momentum, there is an absence of a clear conceptualization and operationalization of the construct. This paper aims to provide a grounded theory definition of customer gratitude, develops and validates a gratitude scale to fully capture the comprehensive definition and assesses the scale in a nomological network with antecedents and consequences. Design/methodology/approach This qualitative study and four quantitative studies examine customer gratitude within service encounters. Findings Results from all five studies support a three-dimensional definition of customer gratitude that includes affective, behavioral and cognitive dimensions. The quantitative findings show that the three-dimensional gratitude scale offers strong predictive ability of loyalty and relationship continuity and that gratitude maintains its effect on these relational outcomes after assessing other mediating mechanisms (e.g. value). Research limitations/implications This research offers an expanded conceptual definition and scale of customer gratitude that conforms to theory and the extant literature. The scale maintains construct validity which is supported in a nomological context of theoretically based antecedents and consequences. Originality/value This work advances the emerging gratitude literature by clearly delineating the construct’s domain, measurement and impact on relational outcomes.

Point-Based CAD/CAM Geometric Model Design

2013 ◽  
Vol 690-693 ◽  
pp. 2757-2761
Author(s):  
Feng Jun Wang
Keyword(s):  
System Development ◽  
Geometric Model ◽  
Model Design ◽  
Application Process ◽  
Development Methodology ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
Technology Cad ◽  
Definition Of ◽  
Machinery Manufacturing

At present, CAD/CAM technology is applied in many areas, and machinery manufacturing was one of these areas in which CAD/CAM technology is the first and most widely used. With the development of CAD/CAM technology, CAD/CAM technology has become a key technology to improve the design and manufacturing standards, and enhance the competitiveness of the industry. In this paper, the concept of point-based geometric models used in CAD/CAM is proposed, the definition of the point-based geometric model and its CAD/CAM application process are suggested, and the geometric characteristics of the point-based geometric model and the CAD/CAM system development methodology are analysed.

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