Deterministic Selection of Processing Parameters

1997 ◽  
Author(s):  
P. Armstrong ◽  
I. Scott ◽  
T. Brice ◽  
D. Ireson
Keyword(s):  
Processing Parameters ◽  
Selection Of

scholarly journals MATERIAL AND THERMAL ANALYSIS OF LASER SINTERTED PRODUCTS

2013 ◽  
Vol 7 (1) ◽  
pp. 15-19 ◽  
Author(s):  
Radovan Hudák ◽  
Martin Šarik ◽  
Róbert Dadej ◽  
Jozef Živčák ◽  
Daniela Harachová
Keyword(s):  
Thermal Analysis ◽  
Heat Stress ◽  
Thermal Stresses ◽  
Processing Parameters ◽  
Sintering Process ◽  
Input Processing ◽  
Thermal Simulations ◽  
The Impact ◽  
Selection Of

Abstract Thermal analysis of laser processes can be used to predict thermal stresses and consequently deformation in a completed part. Analysis of temperature is also the basic for feedback of laser processing parameters in manufacturing. The quality of laser sintered parts greatly depends on proper selection of the input processing parameters, material properties and support creation. In order to relatively big heat stress in the built part during sintering process, the thermal simulation and thermal analysis, which could help better understand and solve the issue of parts deformations is very important. Main aim of presented work is to prepare input parameters for thermal simulations by the use of RadTherm software (Thermoanalytics Inc., USA), directly during the sintering process and after the process and find out the impact of the heat stress on a final shape and size of the prototype. Subsequently, an annealing process of constructed products after DMLS could be simulated and specified.

DEVELOPMENT OF LASER CLADDING WEAR-RESISTANT COATING ON TITANIUM ALLOYS

2006 ◽  
Vol 13 (05) ◽  
pp. 645-654 ◽  
Author(s):  
RUILIANG BAO ◽  
HUIJUN YU ◽  
CHUANZHONG CHEN ◽  
BIAO QI ◽  
LIJIAN ZHANG
Keyword(s):  
Titanium Alloys ◽  
Laser Cladding ◽  
Strengthening Mechanism ◽  
Processing Parameters ◽  
Wear Resistant Coating ◽  
Wear Resistant ◽  
Microstructure Characteristics ◽  
Resistant Coating ◽  
Selection Of

Laser cladding is an advanced surface modification technology with broad prospect in making wear-resistant coating on titanium alloys. In this paper, the influences of laser cladding processing parameters on the quality of coating are generalized as well as the selection of cladding materials on titanium alloys. The microstructure characteristics and strengthening mechanism of coating are also analyzed. In addition, the problems and precaution measures in the laser cladding are pointed out.

scholarly journals Physical Modeling of the Impeller Construction Impact on the Aluminum Refining Process

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 575
Author(s):  
Mariola Saternus ◽  
Tomasz Merder
Keyword(s):  
Liquid Metal ◽  
Physical Modeling ◽  
Batch Reactor ◽  
Gas Bubbles ◽  
Processing Parameters ◽  
Refining Process ◽  
High Quality ◽  
Optimal Processing ◽  
Industrial Use ◽  
Selection Of

Obtaining high-quality aluminum is associated with the use of an effective method of refining, which is argon-purging, in which gas bubbles are introduced into the liquid metal by means of rotary impellers. Various rotary impellers are used in the industry; however, if a newly designed impeller is constructed, it should be tested prior to industrial use. For this purpose, physical modeling is used, which enables the investigation of the phenomena occurring during refining and the selection of optimal processing parameters without costly research carried out in the industry. The newly designed rotary impeller was tested on the physical model of a URO-200 batch reactor. The flow rate of refining gas was: 10, 15 and 20 dm3·min−1, whereas rotary impeller speed was 300, 400 and 500 rpm. The research consists of a visualization test showing the schemes of the gas bubbles’ dispersion level in the liquid metal and experiments for removing oxygen from water, which is an analogue of removing hydrogen from aluminum.

scholarly journals Curing Temperature Effects on the Tensile Properties and Hardness of γ−Fe2O3 Reinforced PDMS Nanocomposites

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yvonne Konku-Asase ◽  
Abu Yaya ◽  
Kwabena Kan-Dapaah
Keyword(s):  
Mechanical Properties ◽  
Quantitative Data ◽  
Biomedical Applications ◽  
Processing Parameters ◽  
Curing Temperature ◽  
Background Information ◽  
Chemical Bonds ◽  
Research Groups ◽  
Preparation Conditions ◽  
Selection Of

The mechanical properties of plain polydimethylsiloxane (PDMS) and its nanocomposites have been exploited for various theranostic biomedical applications. Although several research groups have investigated the effects of preparation conditions—especially curing temperature and time—on bulk mechanical properties of plain PDMS, there are no reported similar studies for its nanocomposites. In this study, mechanical properties of PDMS reinforced by different volume fractions (ϕmnp=0–2 vol. %) of γ-Fe2O3 nanoparticles (NPs) were investigated and quantitative data presented for different curing temperatures (25, 100, and 150°C). To a large extent, γ-Fe2O3 NPs were uniformly dispersed in the PDMS matrix with no primary chemical bonds formed. For the temperatures tested, the data showed an increase for Young’s modulus (E) of about 170% (1.36–3.71 MPa) and a decrease of the ultimate tensile strength (UTS) of about 65% (6.48–2.93 MPa) with increasing concentration of the NPs. Furthermore, hardness (Shore A) (H) increased with curing temperature but decreased with concentration. Based on the findings, we conclude that the linear relationship between the calculated mechanical properties (E, UTS, H) and small ϕmnp is independent of the curing temperature. The experimental data provide useful background information for the selection of processing parameters for PDMS nanocomposite fabrication.

NC Machining Program Simulation and Experiments for Pelton Runner

2016 ◽  
Vol 836-837 ◽  
pp. 417-424
Author(s):  
Yu Wang ◽  
Jia Xin Guo ◽  
Bao Tao Wang ◽  
Yuan Sheng Zhai
Keyword(s):  
Three Dimensional ◽  
Processing Parameters ◽  
Nc Machining ◽  
Cnc Machining ◽  
Dimensional Structure ◽  
Cnc Machine ◽  
Three Dimensional Structure ◽  
Milling Parameters ◽  
Processing Program ◽  
Selection Of

With pelton turbines and other complex three-dimensional structure cavities that contains various shaped surfaces and all kinds of larger curvature, the three-axis CNC machine with a tool rotary to achieve the four coordinate overall Pelton CNC machining. According to processing characteristics of pelton runner, the paper determines the selection of materials and the overall structure of the tool. And the appropriate way of milling and milling parameters are made. The overall processing program and processing parameters of pelton runner are designed on this basis. The feasibility of the process and cutting route are verified by the simulation of cutting route and experiments.

Influence of SLS processing parameters according to the new mathematical model on flexural properties

2016 ◽  
Vol 22 (2) ◽  
pp. 258-268 ◽  
Author(s):  
Ana Pilipović ◽  
Bogdan Valentan ◽  
Mladen Šercer
Keyword(s):  
Mathematical Model ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Flexural Properties ◽  
Content Type ◽  
Manufacturing Procedure ◽  
Fabrication Parameters ◽  
Selection Of

Purpose The purpose of this paper is the selection of production parameters in selective laser sintering – SLS for the production of quality products (e.g. good mechanical properties). The manufacturing procedure affects the properties, which is especially significant in additive procedures, as the products are not cheap and the procedure and material need to be optimally selected. Design/methodology/approach The paper presents an analysis of the fabrication parameters in selective laser sintering (SLS) that affect the flexural properties of the finished product. Findings The influence of a new parameter has been found, the overlay ratio, and using the mathematical and scheme method, the selection of parameters for obtaining the optimal flexural properties has been proposed. Originality/value The paper presents a new mathematical model for the calculation of the processing parameters in SLS of polymer products and gives a diagram for the determination of which parameters are the best to use for practical purposes.

scholarly journals Mathematical Model for the Selection of Processing Parameters in Selective Laser Sintering of Polymer Products

2014 ◽  
Vol 6 ◽  
pp. 648562 ◽  
Author(s):  
Ana Pilipović ◽  
Igor Drstvenšek ◽  
Mladen Šercer
Keyword(s):  
Mathematical Model ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Manufacturing Procedure ◽  
Initial Idea ◽  
Properties Of Materials ◽  
Complicated Geometry ◽  
Manufacturing Parameters ◽  
Selection Of

Additive manufacturing (AM) is increasingly applied in the development projects from the initial idea to the finished product. The reasons are multiple, but what should be emphasised is the possibility of relatively rapid manufacturing of the products of complicated geometry based on the computer 3D model of the product. There are numerous limitations primarily in the number of available materials and their properties, which may be quite different from the properties of the material of the finished product. Therefore, it is necessary to know the properties of the product materials. In AM procedures the mechanical properties of materials are affected by the manufacturing procedure and the production parameters. During SLS procedures it is possible to adjust various manufacturing parameters which are used to influence the improvement of various mechanical and other properties of the products. The paper sets a new mathematical model to determine the influence of individual manufacturing parameters on the polymer product made by selective laser sintering. Old mathematical model is checked by statistical method with central composite plan and it is established that old mathematical model must be expanded with new parameter beam overlay ratio. Verification of new mathematical model and optimization of the processing parameters are made on SLS machine.

Selection of processing parameters for solving the 3D inverse problem of gravity exploration by the discrete Fourier transform method in GIS INTEGRO

2021 ◽  
pp. 47-52
Author(s):  
Nadezhda Pimanova ◽  
Viktor Spiridonov
Keyword(s):  
Inverse Problem ◽  
Fourier Transform ◽  
Discrete Fourier Transform ◽  
A Priori ◽  
Processing Parameters ◽  
Effective Density ◽  
Transform Method ◽  
Optimal Values ◽  
Priori Information ◽  
Selection Of

In GIS INTEGRO, a program using the discrete Fourier transform is created to solve the 3D inverse problem of gravimetry. The result of its work is a 3D distribution of the effective density. The program allows to use an extended parametrization of the form: fα,β(r,x) = f(r,zα)|z|–β. By changing the parameters α — "depth multiplier" — and β — "exponent at z"— one can obtain various equivalent distributions of effective densities and choose the most appropriate one based on a priori information. The experience of solving the 3D inverse problem by this method with different set values of these parameters allowed us to recommend the optimal values. As a criterion for choosing a solution from a variety of possible solutions, it is proposed to use a comparison of them with the data of seismic studies of the DDS and the CCP.

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