scholarly journals МЕТОД СОЗДАНИЯ МОДЕЛЕЙ САМОЛЕТОВ С ПОМОЩЬЮ СИСТЕМ CAD/CAM/CAE И АДДИТИВНЫХ ТЕХНОЛОГИЙ

2018 ◽  
pp. 24-34
Author(s):  
Ю. Б. Витязев ◽  
А. Г. Гребеников ◽  
А. М. Гуменный ◽  
А. М. Ивасенко ◽  
А. А. Соболев
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Additive Technologies ◽  
Direct Metal Laser Sintering ◽  
Fused Deposition ◽  
Cad Cam ◽  
Deposition Modeling ◽  
Laser Stereolithography

The analysis of the most applicable in mechanical engineering additive technologies (fused deposition modeling, selective laser sintering, laser stereolithography, direct metal laser sintering) have been performed. Method of creating airplane models using CAD/CAM/CAE systems and additive manufacturing is presented. The results of the application of selective laser sintering and fused deposition modeling for the manufacture of training aircraft models are considered.

scholarly journals USE OF FUSED DEPOSITION MODELING PROCESS IN INVESTMENT PRECISION CASTING AND RISK OF USING SELECTIVE LASER SINTERING PROCESS

2012 ◽  
pp. 226-230
Author(s):  
SIVADASAN M ◽  
N.K SINGH ◽  
ANOOP KUMAR SOOD
Keyword(s):  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Thermal Response ◽  
Acrylonitrile Butadiene Styrene ◽  
Laser Sintering ◽  
Precision Casting ◽  
Fused Deposition ◽  
Rp Process ◽  
Deposition Modeling ◽  
Metallic Parts

Investment Castings (IC) is one of the most economical ways to produce intricate metallic parts when forging, forming and other casting processes tend to fail. However, high tooling cost and long lead time associated with the fabrication of metal moulds for producing IC wax (sacrificial) patterns result in cost justification problems for customized single casting or small-lot production. Generating pattern using rapid prototyping (RP) process may be one of the feasible alternatives. For this purpose present study assessed the suitability of the fused deposition modeling (FDM) process for creating sacrificial IC patterns by studying FDM fabricated part thermal response at various temperatures. A series of experiments with RP patterns are conducted and a set of test castings are also made in steel for establishing feasibility. The build material used is acrylonitrile butadiene styrene (ABS). As an annexe to this work a concurrent attempt is also made to quantify the risk in using Selective Laser Sintering patterns for Investment Castings. Authors hope this work might establish applicability of ABS in IC and also lead the investigations to theoretically tone down the shell cracking tendency with Selective Laser Sintering patterns when Proprietary Duraform is used as the build material.

scholarly journals Orthoses Development Using Modern Technologies

2021 ◽  
Author(s):  
Branko Štefanovič ◽  
Mária Danko ◽  
Monika Michalíková ◽  
Lucia Bednarčíková ◽  
Viktória Rajťúková ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Plastic Material ◽  
3D Scanning ◽  
Fused Deposition ◽  
Innovative Methods ◽  
Cad Cam ◽  
Deposition Modeling ◽  
Cam Software ◽  
Modern Technologies

The aim of this study was to design, manufacture and verify orthoses using innovative methods. 3D scanning, additive manufacturing and CAD/CAM software are applied during the development process. Target group of the study are subjects with insufficient gripping and manipulating functions of the arm and forearm. Positives are obtained using a hand-held 3D scanner Artec Eva. Specific 3D scanning methodology is applied during this process. Individual orthoses are designed in an open-source CAD software Meshmixer and manufactured by FDM (Fused Deposition Modeling) additive technology from a biocompatible plastic material. All models are inspected and verified in an analysis software VGStudio MAX. Given methodology can be used not only for this specific purpose, but also for orthosis development in general.

scholarly journals Additive Manufacturing: A next gen fabrication

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Prajakta Subhedar
Keyword(s):  
Rapid Prototyping ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Consumer Products ◽  
Cad Model ◽  
Final Model ◽  
Fused Deposition ◽  
Layer Manufacturing ◽  
Deposition Modeling

A class of technologies referring to Rapid Prototyping (RP) or Additive or Layer Manufacturing or 3D Printing allows designers to quickly create tangible prototype instead of using two dimensional pictures. This technology produces models and prototype parts from 3D CAD model data created from 3D object digitizing systems. Rapid Prototyping forms parts by joining together liquid, powder or sheet materials. Physical models are built using three basic stages: pre-processing, building, post-processing. Pre-processing consists of generation of CAD model, convert into STL format and slice the STL files into cross sectional layers. In building process, construction of model takes place one layer atop another. Post process consists of cleaning and finishing the final model. Common types of Rapid Prototyping technologies popular in industry are: Steriolithography, Fused Deposition Modeling, Selective Laser Sintering, Laminated Object Manufacturing,3 D Printing. The selection of the processes depends upon the material to be cured to build the final model. Rapid Prototyping technologies are used in various industries like Automobiles, Consumer products, Medical, Academics, Aerospace, Government and Military. This poster talks about few challenges to be considered in Rapid Prototyping like shrinkage and distortion of final model, mechanical performance of RP model and limitations to mass quantity. : Layer Manufacturing, CAD Model, STL format, Steriolithography, Fused Deposition Modeling, Selective Laser Sintering.

scholarly journals Additive manufacturing of bone scaffolds

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Youwen Yang ◽  
Guoyong Wang ◽  
Huixin Liang ◽  
Chengde Gao ◽  
Shuping Peng ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Computer Aided Design ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Coupling Efficiency ◽  
Laser Sintering ◽  
High Heating Rate ◽  
Scaffold Design ◽  
Fused Deposition ◽  
Current Characteristics

Additive manufacturing (AM) can obtain not only customized external shape but also porous internal structure for scaffolds, both of which are of great importance for repairing large segmental bone defects. The scaffold fabrication process generally involves scaffold design, AM, and post-treatments. Thus, this article firstly reviews the state-of-the-art of scaffold design, including computer-aided design, reverse modeling, topology optimization, and mathematical modeling. In addition, the current characteristics of several typical AM techniques, including selective laser sintering, fused deposition modeling (FDM), and electron beam melting (EBM), especially their advantages and limitations are presented. In particular, selective laser sintering is able to obtain scaffolds with nanoscale grains, due to its high heating rate and a short holding time. However, this character usually results in insufficient densification. FDM can fabricate scaffolds with a relative high accuracy of pore structure but with a relative low mechanical strength. EBM with a high beam-material coupling efficiency can process high melting point metals, but it exhibits a low-resolution and poor surface quality. Furthermore, the common post-treatments, with main focus on heat and surface treatments, which are applied to improve the comprehensive performance are also discussed. Finally, this review also discusses the future directions for AM scaffolds for bone tissue engineering.

scholarly journals The Exploitation of Polymer Based Nanocomposites for Additive Manufacturing: A Prospective Review

2019 ◽  
Vol 890 ◽  
pp. 113-145
Author(s):  
Imran Khan ◽  
Christina S. Kamma-Lorger ◽  
Saeed D. Mohan ◽  
Artur Mateus ◽  
Geoffrey R. Mitchell
Keyword(s):  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Plastic Material ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Three Dimensional Objects ◽  
Fused Deposition ◽  
Metal Ceramic ◽  
Deposition Modeling ◽  
Manufacturing Applications

Additive manufacturing (AM) is a well-known technology for making real three dimensional objects, based on metal, ceramic and plastic material used for various applications. The aim of this review is to explore and offer an insight in to the state of the art polymer based nanocomposites in to additive manufacturing applications. In context to this, the developing efforts and trends in nanocomposites development particularly for additive manufacturing processes were studied and summed up. The scope and limitations of nanocomposites into Stereolithography, selective laser sintering and fused deposition modeling was explored and highlighted. The review highlights widely accepted nanoparticles for range of applications including mechanical, electrical, flame retardance and crossing over into more biological with the use of polymer matrices. Acquisition of functional parts with limitations in regard to printing is highlighted. Overall, the review highlights successes, limitations and opportunities that the union of AM and polymer based nanocomposites can bring to science and technology.

Comparative Analysis of Different Methods of Rapid Tooling

2005 ◽  
Vol 475-479 ◽  
pp. 2873-2876
Author(s):  
Charles Martin ◽  
J.V. Sasutil ◽  
M. Kouhkan ◽  
E. Lorea ◽  
Rafiq Noorani
Keyword(s):  
Surface Roughness ◽  
Fused Deposition Modeling ◽  
Selective Laser Sintering ◽  
Dimensional Accuracy ◽  
Laser Sintering ◽  
Rapid Tooling ◽  
Composite Manufacturing ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Overall Performance

The purpose of this experiment was to compare different techniques that help improve conventional tooling. The methods investigated were chosen from both the methods of Rapid Tooling: direct and indirect. Six different methods were selected including, Sand Casting, Investment Casting, Fused Deposition Modeling (FDM), Direct Composite Manufacturing (DCM), Selective Laser Sintering (SLS), and Stereolithography (SLA). Several industrial corporations were contacted to help complete all six tests. Five parameters were selected for the comparison of these samples: dimensional accuracy, tensile strength, surface roughness, time for completion, and weight. Through comparison the strengths and weaknesses of each method was determined. It was found that different methods did better in various parameters. However, Selective Laser Sintering (SLS) seemed to have the best overall performance.

An Update on the Use of Alginate in Additive Biofabrication Techniques

2019 ◽  
Vol 25 (11) ◽  
pp. 1249-1264 ◽  
Author(s):  
Amoljit Singh Gill ◽  
Parneet Kaur Deol ◽  
Indu Pal Kaur
Keyword(s):  
Fused Deposition Modeling ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Layer By Layer ◽  
Three Dimension ◽  
Anionic Polymer ◽  
Fused Deposition ◽  
The Status ◽  
Deposition Modeling ◽  
Extrusion Printing

Background: Solid free forming (SFF) technique also called additive manufacturing process is immensely popular for biofabrication owing to its high accuracy, precision and reproducibility. Method: SFF techniques like stereolithography, selective laser sintering, fused deposition modeling, extrusion printing, and inkjet printing create three dimension (3D) structures by layer by layer processing of the material. To achieve desirable results, selection of the appropriate technique is an important aspect and it is based on the nature of biomaterial or bioink to be processed. Result & Conclusion: Alginate is a commonly employed bioink in biofabrication process, attributable to its nontoxic, biodegradable and biocompatible nature; low cost; and tendency to form hydrogel under mild conditions. Furthermore, control on its rheological properties like viscosity and shear thinning, makes this natural anionic polymer an appropriate candidate for many of the SFF techniques. It is endeavoured in the present review to highlight the status of alginate as bioink in various SFF techniques.

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