ANALYSIS OF THE TECHNOLOGICAL PARAMETERS OF 3D PRINTING ON THE STRENGTH PROPERTIES OF FINISHED MABS AND PET PRODUCTS

A study of mechanical and optical properties of samples of transparent plastic Polyethylene terephthalate glycol (PETG) manufactured by additive technology Fused Filament Fabrication (FFF) was carried out. PETG plastic is used in medicine, particularly in dentistry due to its unique set of properties: strength, elasticity, resistance to aggressive environments, transparency. Preserving the complex of properties of PETG plastic, including transparency, during 3D-printing is an important technical task. In order to solve this task a set of studies of PETG laboratory samples was carried out. The optimum modes of 3D printing were determined to provide PETG samples with increased strength properties, preservation of elastic properties and optical transparency of the material. The increase in the optical transparency of the material is provided by an additional post-treatment of the printed samples surface with a chemical reagent. The influence of technological parameters of the post- treatment mode on the mechanical and optical properties of the printed samples has been investigated. The novelty of the work consists in a comprehensive study of the modes of manufacturing products from PETG by technology FFF with subsequent post-treatment, allowing to preserve the transparency of the polymeric material.

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Influence of Constructive and Technological Parameters at Generated Spiral Parts with DLP 3D Printing Process

Materiale Plastice ◽

10.37358/mp.19.4.5269 ◽

2019 ◽

Vol 56 (4) ◽

pp. 801-811

Author(s):

Mircea Dorin Vasilescu

Keyword(s):

3D Printing ◽

Great Influence ◽

Polymerization Process ◽

Generation Process ◽

Technological Parameters ◽

Printing Process ◽

The Third ◽

Solid Models ◽

Specific Factors ◽

Printing Processes

This work are made for determine the possibility of generating the specific parts of a threaded assembly. If aspects of CAD generating specific elements was analysed over time in several works, the technological aspects of making components by printing processes 3D through optical polymerization process is less studied. Generating the threaded appeared as a necessity for the reconditioning technology or made components of the processing machines. To determine the technological aspects of 3D printing are arranged to achieve specific factors of the technological process, but also from the specific elements of a trapezoidal thread or spiral for translate granular material in supply process are determined experimentally. In the first part analyses the constructive generation process of a spiral element. In the second part are identified the specific aspects that can generation influence on the process of realization by 3D DLP printing of the two studied elements. The third part is affected to printing and determining the dimensions of the analysed components. We will determine the specific value that can influence the process of making them in rapport with printing process. The last part is affected by the conclusions. It can be noticed that both the orientation and the precision of generating solid models have a great influence on the made parts.

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RESEARCH OF PHYSICAL AND MECHANICAL PROPERTIES OF WOOD-FIBER MATERIALS

chemistry of plant raw material ◽

10.14258/jcprm.2020048150 ◽

2020 ◽

pp. 451-457

Author(s):

Aleksandr Yur'yevich Vititnev ◽

Yuriy Davydovich Alashkevich ◽

Natal'ya Geral'dovna Chistova ◽

Roman Aleksandrovich Marchenko ◽

Venera Nurullovna Matygullina

Keyword(s):

Mechanical Properties ◽

Wood Fiber ◽

Experimental Studies ◽

Physical And Mechanical Properties ◽

Production Method ◽

Strength Properties ◽

Grinding Process ◽

Technological Parameters ◽

Fiber Materials ◽

Traditional Construction

This paper presents the results of experimental studies of the physical and mechanical properties of wood-fiber boards of the wet production method when regulating the design and technological parameters of the grinding process. This allowed us to determine the influence of the working clearance between the grinding discs and the concentration of fibre mass with the subject to of quality change wood fiber after defibrator using the developed construction of the disc fibrillation action on the physico-mechanical properties of boards. As a result of the experiment, regression models were obtained that adequately describe the studied grinding process and allow predicting the values of physical and mechanical properties of the finished product depending on the established parameters process. A comparative analysis of the size and quality characteristics of the fiber semi-finished product and its fractional composition when using a developed construction the disc of refiner fibrillation action and a traditional design used in industry is carried out. The preferential efficiency of the grinding process under the fibrillating effect the disc of refiner in comparison with the traditional construction disc of refiner is established. As a result, there is a significant improvement in the quality indicators of the fiber semi-finished product and its composition due to the formation and predominance in the total mass of long and thin, respectively, flexible fibrillated fibers with high tile-forming properties, which allows to increase the strength properties of the product (by 20–25%), without using binding resins.

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To the Question of Designing Baromembrane Combined Type Apparatus

Vestnik Tambovskogo gosudarstvennogo tehnicheskogo universiteta ◽

10.17277/vestnik.2021.03.pp.415-427 ◽

2021 ◽

Vol 27 (3) ◽

pp. 415-427

Author(s):

S. I. Lazarev ◽

O. V. Lomakina ◽

V. E. Bulanov ◽

I. V. Khorokhorina

Keyword(s):

Strength Properties ◽

Technological Parameters ◽

Mechanical Loads ◽

Membrane Apparatus ◽

Strength And Stiffness ◽

Selection Of ◽

Toroidal Shells ◽

Type Apparatus

The paper considers works on methods for calculating design and technological parameters, design of membrane equipment, research of technological features of membrane devices, selection of design schemes, methods for calculating strength and stiffness. A method has been developed for calculating mechanical loads and determining the thickness of plates and toroidal shells of a membrane apparatus of the combined type, which makes it possible to assess the strength properties of apparatus of this class. An example of a calculation, which makes it possible to assess the adequacy of the application of this technique to devices of the combined type, is given.

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Influence of Technological Parameters on the Emision on DLP 3D Printing Process

Revista de Chimie ◽

10.37358/rc.19.12.7763 ◽

2020 ◽

Vol 70 (12) ◽

pp. 4387-4392

Keyword(s):

3D Printing ◽

Point Of View ◽

Particulate Emissions ◽

Technological Parameters ◽

Printing Process ◽

Laboratory Activity ◽

Emission Point ◽

Measurement Methodology ◽

Made In

The present work addresses the issue of emissions requires it made in resin polymerization processes at 3D digital light process (DLP) printing. From an emission point of view, both particulate and chemical emissions are analysed in the form of gases during the DLP printing process. In the paper, we present first the element, which are study. In second part of the paper, we presented the printer, material for printing, measuring apparatus for emission and measurement methodology. In the three part of paper, we made the determinations for gas emissions. Will follow the determinations for particulate emissions. In the final chapter, the data generated by the printing emissions related to the problems specific to the laboratory activity and it has made the specific conclusion in rapport with the printing process. Keywords: 3D printing; emission particles; air pollution, resin material, DLP printing

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Influence of Technological Parameters on the Dimension of GEAR Parts Generated with PLA Matherial by FDM 3D Printing

Materiale Plastice ◽

10.37358/mp.18.2.5005 ◽

2018 ◽

Vol 55 (2) ◽

pp. 247-251 ◽

Cited By ~ 1

Author(s):

Mircea Dorin Vasilescu ◽

Traian Fleser

Keyword(s):

Computer Simulation ◽

3D Printing ◽

Gear Tooth ◽

Energy Resource ◽

Electric Machines ◽

Resource Consumption ◽

Point Of View ◽

Technological Parameters ◽

Functional Characteristics

The purpose of this research is to establish the technology of 3D printable production on the principle of FDM of gears made of PLA, ABS and PETG mainly. In the paper we present first the dimensional generation and specific aspects that need to be considered to produce gears with internal or external teeth of the cylindrical type with vertical or inclined teeth. Generating the gears appeared as a necessity for the reconditioning of the components of the processing machines and of the electric machines made both in the process of elaboration of the bachelor�s and the laboratory works, with reduced energy resource consumption and low pollution as low as possible. After the construction, we past to identify the dimension that have implications for both mechanical and kinematic resistance to achieve a product with good cinematic and functional characteristics. After that are made an analysis of the layers generated, both from the computer simulation and from the point of view of the analysis of layers physically generated on a gear tooth with external teeth.

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Study of the Influence of Technological Parameters on Generating Flat Part with Cylindrical Features in 3D Printing with Resin Cured by Optical Processing

Polymers ◽

10.3390/polym12091941 ◽

2020 ◽

Vol 12 (9) ◽

pp. 1941

Author(s):

Aurel Tulcan ◽

Mircea Dorin Vasilescu ◽

Liliana Tulcan

Keyword(s):

3D Printing ◽

Flat Surface ◽

Coordinate Measuring Machine ◽

3D Printer ◽

Light Control ◽

Technological Parameters ◽

Optical Processing ◽

Measuring Machine ◽

The Impact

The objective of this paper is to determine how the supporting structure in the DLP 3D printing process has influences on the characteristics of the flat and cylindrical surfaces. The part is printed by using the Light Control Digital (LCD) 3D printer technology. A Coordinate Measuring Machine (CMM) with contact probes is used for measuring the physical characteristics of the printed part. Two types of experiment were chosen by the authors to be made. The first part takes into consideration the influence of the density of the generated supports, at the bottom of the printed body on the characteristics of the flat surface. In parallel, it is studying the impact of support density on the dimension and quality of the surface. In the second part of the experiment, the influence of the printed supports dimension on the flatness, straightness and roundness of the printed elements were examined. It can be observed that both the numerical and dimensional optimum zones of the support structure for a prismatic element could be determined, according to two experiments carried out and the processing of the resulting data. Based on standardized data of flatness, straightness and roundness, it is possible to put in accord the values determined by measurement within the limits of standardized values.

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The Selection of Appropriate Process Parameters of Diffusion Bonding in Heterogeneous Weld of 355J2/AISI 316L Steels

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.737.101 ◽

2017 ◽

Vol 737 ◽

pp. 101-106 ◽

Cited By ~ 4

Author(s):

Jaromír Moravec ◽

Iva Nováková

Keyword(s):

Diffusion Bonding ◽

Strength Properties ◽

Aisi 316L ◽

Fundamental Theory ◽

Technological Parameters ◽

High Alloy ◽

Parameters Selection ◽

316L Steel ◽

Gleeble 3500 ◽

Selection Of

The aim of this article is to present possibilities of diffusion bonding utilization at creation heterogeneous joints where strength properties are taken into account. The joint was implemented to low-alloy structural ferrite-pearlite S355J2 steel and high-alloy austenitic AISI 316L steel. The fundamental theory of diffusion and also design and realisation of experimental creation of diffusion joint in thermal-mechanical simulator Gleeble 3500 is described in the article. Furthermore, procedure of technological parameters selection, when optimisation of strength properties of heterogeneous joint including metallographic evaluation are taken into account, are presented.

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Determining the parameters for a 3D-printing process using the fused deposition modeling in order to manufacture an article with the required structural parameters

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2021.227075 ◽

2021 ◽

Vol 2 (1 (110)) ◽

pp. 70-80

Author(s):

Oleksii Vambol ◽

Andrii Kondratiev ◽

Svitlana Purhina ◽

Maryna Shevtsova

Keyword(s):

3D Printing ◽

Fused Deposition Modeling ◽

Structural Parameters ◽

Technological Parameters ◽

Non Linear Programming ◽

Fused Deposition ◽

Elasticity Module ◽

Deposition Modeling ◽

The Impact ◽

Printing Parameters

The mass application of FDM technology is slowed down due to the difficulty of selecting 3D printing parameters in order to manufacture an article with the required characteristics. This paper reports a study into the impact of 3D printing parameters (temperature, print speed, layer height) on mechanical parameters (strength, elasticity module), as well as on the accuracy of printing and roughness of the surface of a specimen based on thermoplastic (PLA plastic). Several batches of specimens were fabricated for this study in accordance with ASTM D638 and ASTM D695, which were tested for tension, geometric accuracy, and roughness. Based on the experimental data, regression analysis was carried out and the functional dependences of the strength, elasticity module, printing precision, roughness of a surface on 3D printing parameters (temperature, speed, thickness of the layer) were constructed. In addition, the derived mathematical model underlying a method of non-linear programming has established such printing parameters that could provide for the required properties of a structure. The analytical dependences reported in the current work demonstrate a high enough determination factor in the examined range of parameters. Using functional dependences during the design phase makes it possible to assess the feasibility of its manufacture with the required properties, reduce the time to work out the process of printing it, and give recommendations on the technological parameters of 3D printing. The recommendations from this study could be used to make PLA-plastic articles for various purposes with the required properties

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Design, Simulation and Optimization of an Additive Laser-Based Manufacturing Process for Gearbox Housing with Reduced Weight Made from AlSi10Mg Alloy

Metals ◽

10.3390/met12010067 ◽

2021 ◽

Vol 12 (1) ◽

pp. 67

Author(s):

Liubov Magerramova ◽

Vladimir Isakov ◽

Liana Shcherbinina ◽

Suren Gukasyan ◽

Mikhail Petrov ◽

...

Keyword(s):

Experimental Studies ◽

Strength Properties ◽

Body Parts ◽

The Finite Element Method ◽

Technological Parameters ◽

Simulation And Optimization ◽

Precision Casting ◽

Production Techniques ◽

Material Forming ◽

Physical And Mechanical Characteristics

The gas turbine engine's (GTE) development aims for the increasing the efficiency, strength, reliability and safety of its components. To create competitive engines, housing parts and components with high functionality and reduced weight are needed. Especially difficult in the design and production are the gearboxes for aviation GTE. Traditional technologies based on precision casting or material forming operations have significant limitations due to the complexity of fulfilling multiple different requirements. Nowadays, one of the progressive production techniques is additive manufacturing. The article presents the results of computational and experimental studies that substantiate the applicability of laser additive technology to reduce the mass of body parts by up to 15% while ensuring their strength properties. The physical and mechanical characteristics of aluminum alloys acceptable for the manufacturing of housing parts were analyzed. The necessary characteristics of the powder alloy of the Al-Si system and the technological parameters of the L-PBF of the modified housing of the gear reducer are established. Using the finite element method (FEM) the L-PBF process was numerically simulated and the technological modes for synthesis of the AlSi10Mg alloy powder were optimized. With the help of a serial 3D printer ProX320DMP, the prototype of a gear housing was manufactured.

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