Development of Powders for Selective Laser Sintering

2015 ◽  
Vol 760 ◽  
pp. 521-526
Author(s):  
Diana Irinel Băilă ◽  
Cristian Vasile Doicin ◽  
Oana Cătălina Mocioiu
Keyword(s):  
Automotive Industry ◽  
Computer Aided Design ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Machine Building ◽  
Scale Model ◽  
Sintering Process ◽  
Medical Instruments ◽  
Aided Design

The selective laser sintering is a technique used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design CAD data. This technique is used to obtain complex pieces in different domains like machine building industry, automotive industry, foundry and medicine. The selective laser sintering process is used to obtain different prototypes, medical instruments or personalized implants in medicine. The powders used to obtain the medical instruments and for implants must to be very resistant to corrosion, non-toxic and present good fatigue resistance. The powders used are in generally, stainless steel, alloy titan TA6V, alloy Co-Cr and different polyamides.

Laser Additive Manufacturing

3D Printing ◽  
2017 ◽  
pp. 154-171 ◽  
Author(s):  
Rasheedat M. Mahamood ◽  
Esther T. Akinlabi
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Computer Aided Design ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Cad Model ◽  
Laser Additive Manufacturing ◽  
Computer Aided ◽  
Manufacturing Technologies ◽  
Aided Design

Laser additive manufacturing is an advanced manufacturing process for making prototypes as well as functional parts directly from the three dimensional (3D) Computer-Aided Design (CAD) model of the part and the parts are built up adding materials layer after layer, until the part is competed. Of all the additive manufacturing process, laser additive manufacturing is more favoured because of the advantages that laser offers. Laser is characterized by collimated linear beam that can be accurately controlled. This chapter brings to light, the various laser additive manufacturing technologies such as: - selective laser sintering and melting, stereolithography and laser metal deposition. Each of these laser additive manufacturing technologies are described with their merits and demerits as well as their areas of applications. Properties of some of the parts produced through these processes are also reviewed in this chapter.

Application of Rapid Prototyping Technology in Intelligent Optimization Design Area

2013 ◽  
Vol 404 ◽  
pp. 754-757 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Three Dimensional ◽  
Scale Model ◽  
Intelligent Optimization ◽  
Computer Aided ◽  
Aided Design

Rapid Prototyping (RP) can be defined as a group of techniques used to quickly fabricate a scale model of a part or assembly using three-dimensional Computer Aided Design (CAD) data. What is commonly considered to be the first Rapid Prototyping technique, Stereolithography was developed by 3D Systems of Valencia, CA, USA. The company was founded in 1986, and since then, a number of different Rapid Prototyping techniques have become available. In paper are presented possibilities of Rapid Prototyping application in area of intelligent optimization design.

scholarly journals AUTOMATION OF STRUCTURAL AND PARAMETRIC ANALYSIS OF PROJECT DECISIONS AND TRAINING OF THE DESIGNER OF MACHINE-BUILDING PRODUCTS WITH CAD COMPASS

2019 ◽  
Vol 2018 (2) ◽  
pp. 26-33
Author(s):  
Александр Афанасьев ◽  
Afanasyev Afanasyev ◽  
Сергей Бригаднов ◽  
Sergey Brigadnov
Keyword(s):  
Adaptive Learning ◽  
Computer Aided Design ◽  
Parametric Analysis ◽  
Three Dimensional ◽  
Machine Building ◽  
Building Products ◽  
Computer Aided ◽  
Design Solutions ◽  
Aided Design

The actual task in the field of computer-aided design of machine-building objects is to increase the level of automation of structural-parametric analysis of design solutions due to the repetition of their use, reducing the number of design operations and ensuring the corresponding competencies of designers. Developed methods and algorithms should ensure the acquisition of the necessary competencies for the designer for successful project activities in the field of computer-aided design, increasing the effectiveness of training. The system of analysis of design solutions should improve the quality of design solutions implemented in CAD KOMPAS-3D. In this paper, an overview of methods, systems and tools for analyzing design solutions implemented in the CAD-3D environment. The main features of such systems are described, their main disadvantages are identified: the lack of functions for determining non-optimal sequences of design operations, the inability to automatically rebuild a three-dimensional model of a machine-building product on the basis of analysis of the design model tree. A complex system for the analysis of project solutions and the training of a designer was developed and implemented, based on methods, models and algorithms for analysis and adaptive learning. The results of a computational experiment are presented, on the basis of which it can be concluded that the use of developed software enhances the efficiency and quality of the designer's training in the processes of constructing three-dimensional solid-state machine-building products in CAD KOMPAS-3D.

scholarly journals Investigations of hollow sphere structures produced by selective laser sintering

Mechanik ◽  
2019 ◽  
Vol 92 (7) ◽  
pp. 439-441
Author(s):  
Kamil Cieplak ◽  
Tomasz Majewski
Keyword(s):  
Hollow Sphere ◽  
Computer Aided Design ◽  
Mechanical Energy ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Laser Sintering ◽  
Optimal Method ◽  
Sintering Additive ◽  
Three Dimensional Models

The research of hollow sphere structures as absorbers of mechanical energy is described. The first part of the article is devoted to the description of selective laser sintering additive technique as the optimal method of sample production in the case of laboratory tests. The next part presents the use of computer aided design to create parametric three-dimensional models. Next, the results of experimental tests in the conditions of quasi-static load are presented. Based on the collected data, a qualitative analysis of the structure deformation process was performed and final conclusions are presented.

An Overview on 3D Site Modelling in Civil Engineering

2020 ◽  
pp. 108-127
Author(s):  
Muthuminal R.
Keyword(s):  
Computer Aided Design ◽  
Civil Engineering ◽  
Three Dimensional ◽  
3D Modelling ◽  
Scale Model ◽  
Dimensional Structure ◽  
Scale Modelling ◽  
Basic Concepts ◽  
A Site ◽  
Aided Design

In past decades, for developing a site, engineers used the process of creating a scale model in order to determine their behaviour and to sketch the details collected manually using the drafting process, which behaves as a referring material during the construction of structures. Due to the boom in technology and limitations in drafting, the drawings have been digitized using computer-aided design (CAD) software as a two-dimensional structure (2D). Currently, these drawings are detailed as a three-dimensional structure (3D) that is briefly noted as 3D modelling. Three-dimensional site modelling is an active area that is involved in research and development of models in several fields that has been originated from the scale modelling. In this chapter, the topic 3D site modelling in civil engineering is discussed. First of all, the basic concepts of scale modelling, architectural modelling, and structural modelling are discussed. Then the concept of virtual-based 3D site modelling, its importance, benefits, and steps involved in site modelling are briefed.

Design Method for Inner Structure of Injection Mold Fabricated by Metal Laser Sintering

2012 ◽  
Vol 6 (5) ◽  
pp. 584-590 ◽  
Author(s):  
Hiroshi Koresawa ◽  
◽  
Hirofumi Fukumaru ◽  
Michio Kojima ◽  
Jun Iwanaga ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Design Method ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Optimization Method ◽  
Laser Sintering ◽  
Sintered Body ◽  
Sintering Process

This paper discusses design methods for the internal structure of molds used in production utilizing metal laser sintering combined with high speedmilling which selectively sinters metal powder to form a three dimensional mold. This milling technique is characterized by the fact that the selective laser sintering process and milling process are carried out in alternating sequence, achieving the level of processing accuracy demanded of mold production. In addition, in the selective laser sintering process, because the mechanical strength of the sintered body (Young’s Modulus) is variable, suitable interior structures that consider dynamic conditions are expected. However, in the current state of design, this structure is determined experimentally, and there is a high possibility of incurring unnecessary production time and high costs. In this paper, we investigate a method that incorporates an optimization method using stress that occurs within the structure interior, obtains the interior topological structure as a Young’s Modulus distribution, and designs a suitable interior structure using this distribution. As a result of investigation using numerical analysis, we obtained a structure that reduces the volume of the sintered body, having high mechanical strength in comparison with a conventional structure while improving structural rigidity.

On the Educational-Methodical Complex of Discipline «Engineering and Computer Graphics» in Terms of Modernization of the Course of Descriptive Geometry

2018 ◽  
Vol 6 (5) ◽  
pp. 34-40 ◽  
Author(s):  
Юрий Поликарпов ◽  
Yuriy Polikarpov ◽  
М. Семашко ◽  
M. Semashko ◽  
Л. Худякова ◽  
...  
Keyword(s):  
Computer Graphics ◽  
Computer Aided Design ◽  
Dimensional Space ◽  
New Products ◽  
Three Dimensional ◽  
Machine Building ◽  
Educational Process ◽  
Descriptive Geometry ◽  
Aided Design ◽  
Three Dimensional Space

In connection with the use of machine-building enterprises to create new products of computer-aided design, which solve the problem in three-dimensional space, the problem of modernization of the course of descriptive geometry becomes relevant. The article describes the experience of the Department of descriptive geometry and drawing of the Ufa state aviation technical University for the modernization of the course of descriptive geometry. The questions of development of educational and methodical complex of the modernized discipline “engineering and computer graphics”, about its components which are prepared by Department and are used in educational process at training of bachelors in the directions which are included in the enlarged group of 150000 «Mechanical engineering» are in detail considered.

scholarly journals Prototipagem rápida de pilhas a combustível de óxido sólido

2009 ◽  
Vol 14 (4) ◽  
pp. 1101-1113
Author(s):  
D. Hotza
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Laminated Object Manufacturing ◽  
Computer Aided ◽  
Aided Design

Tecnologias de Prototipagem Rápida (Rapid Prototyping, RP) permitem a fabricação automática de peças com geometria complicada a partir de dados de Projeto Auxiliado por Computador (Computer Aided Design, CAD). A peça tridimensional é construída por consolidação de pó em camadas (processo "aditivo" ou "generativo"). Por isso, estas técnicas estão freqüentemente chamadas de fabricação de forma livre sólida ou fabricação em camadas. Em geral, uma abordagem de 5 etapas do desenvolvimento de produto é comumente aplicada: criação de um modelo de CAD, conversão do modelo de CAD em formato STL, fatiamento do arquivo STL em camadas de seção transversal, fabricação do produto, e finalmente acabamento superficial do produto. Técnicas de RP têm muitos benefícios sobre métodos tradicionais para geração de modelos, ferramentaria e construção de peças de produção de qualidade. Por exemplo, em contraste com processos "subtrativos" (furação, moagem, desbaste) os métodos "aditivos" de RP permitem a fabricação de produtos com estrutura complexa de poros internos que não podem ser fabricados por outros métodos. Técnicas de RP podem diminuir significativamente o tempo de fabricação de pilhas a combustível de óxido sólido (PaCOS) com pequena despesa de operação e reduzido custo de produto quando aplicadas corretamente. Tecnologias como Sinterização Seletiva a Laser (Selective Laser Sintering, SLS), Manufatura de Objetos Laminados (Laminated Object Manufacturing, LOM) e Impressão 3D (3D Printing, 3DP) podem ser usadas para fabricação de protótipos de pilhas a combustível, em particular na configuração planar.

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