Selection of High-Variety Components for Selective Laser Sintering: An Industrial Case Study

2017 ◽  
pp. 238-251 ◽  
Author(s):  
Filippo Fontana ◽  
Enrico Marinelli ◽  
Mirko Meboldt
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Industrial Case Study ◽  
Selection Of

Selection of selective laser sintering materials for different applications

2015 ◽  
Vol 21 (6) ◽  
pp. 630-648 ◽  
Author(s):  
Sunil Kumar Tiwari ◽  
Sarang Pande ◽  
Sanat Agrawal ◽  
Santosh M. Bobade
Keyword(s):  
Process Parameters ◽  
High Performance ◽  
Material Selection ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Optimal Process ◽  
Content Type ◽  
Volume Production ◽  
High Performance Application ◽  
Selection Of

Purpose – The purpose of this paper is to propose and evaluate the selection of materials for the selective laser sintering (SLS) process, which is used for low-volume production in the engineering (e.g. light weight machines, architectural modelling, high performance application, manufacturing of fuel cell, etc.), medical and many others (e.g. art and hobbies, etc.) with a keen focus on meeting customer requirements. Design/methodology/approach – The work starts with understanding the optimal process parameters, an appropriate consolidation mechanism to control microstructure, and selection of appropriate materials satisfying the property requirement for specific application area that leads to optimization of materials. Findings – Fabricating the parts using optimal process parameters, appropriate consolidation mechanism and selecting the appropriate material considering the property requirement of applications can improve part characteristics, increase acceptability, sustainability, life cycle and reliability of the SLS-fabricated parts. Originality/value – The newly proposed material selection system based on properties requirement of applications has been proven, especially in cases where non-experts or student need to select SLS process materials according to the property requirement of applications. The selection of materials based on property requirement of application may be used by practitioners from not only the engineering field, medical field and many others like art and hobbies but also academics who wish to select materials of SLS process for different applications.

Planning and Scheduling Based on an Explicit Representation of the State of the Design

2002 ◽  
Author(s):  
Andre´s Felipe Melo ◽  
P. John Clarkson
Keyword(s):  
Design Process ◽  
The State ◽  
Explicit Representation ◽  
Industrial Case Study ◽  
Planning And Scheduling ◽  
State Action ◽  
Markov Decision ◽  
Definition Of ◽  
Selection Of

This paper describes a computational model that provides planning information useful for scheduling the design process. The model aims to reduce uncertainty in the design process and with it the risk of rework. The view is taken that planning is concerned with choosing between alternative actions and action sequences, but not with resource allocation. The planning model is based on an explicit representation of the state of the design process, the definition of the design capabilities as a pool of tasks, and on the generation and selection of plans by evaluating their reliability. Classical decision theory is used for evaluating the plans: a state-action net is built and analyzed as a Markov decision process. The model produces plans based on qualified task dependencies. These plans can be used as a basis for manual and automated scheduling. In an example industrial case study, a reduction of over 30% in the expected rework was predicted.

Case study: selective laser sintering of the USUSat II small satellite structure

2005 ◽  
Vol 25 (4) ◽  
pp. 267-272 ◽  
Author(s):  
Joel Quincieu ◽  
Chris Robinson ◽  
Brent Stucker ◽  
Todd Mosher
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Small Satellite ◽  
Satellite Structure

Selection of Waste Water Equalization Systems for Multi Product Batch Production Facility: An Industrial Case Study

2010 ◽  
Author(s):  
Vaidehi Bhatt ◽  
Meka. Srinivasarao ◽  
Anand Dhanwani ◽  
Swapan Paruya ◽  
Samarjit Kar ◽  
...  
Keyword(s):  
Waste Water ◽  
Production Facility ◽  
Batch Production ◽  
Industrial Case Study ◽  
Selection Of

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.

Influence of model validation on proper selection of process models—an industrial case study

2005 ◽  
Vol 29 (7) ◽  
pp. 1507-1522 ◽  
Author(s):  
N. Hvala ◽  
S. Strmčnik ◽  
D. Šel ◽  
S. Milanič ◽  
B. Banko
Keyword(s):  
Model Validation ◽  
Process Models ◽  
Proper Selection ◽  
Industrial Case Study ◽  
Selection Of

scholarly journals Selective Laser Sintering And Melting Of Pristine Titanium And Titanium Ti6Al4V Alloy Powders And Selection Of Chemical Environment For Etching Of Such Materials

2015 ◽  
Vol 60 (3) ◽  
pp. 2039-2046 ◽  
Author(s):  
L.A. Dobrzański ◽  
A.D. Dobrzańska-Danikiewicz ◽  
T.G. Gaweł ◽  
A. Achtelik-Franczak
Keyword(s):  
Treatment Process ◽  
Selective Laser Sintering ◽  
3D Models ◽  
Laser Sintering ◽  
Ti6al4v Alloy ◽  
Rapid Manufacturing ◽  
Chemical Processing ◽  
Cad Cam ◽  
Manufacturing Applications ◽  
Selection Of

AbstractThe aim of the investigations described in this article is to present a selective laser sintering and melting technology to fabricate metallic scaffolds made of pristine titanium and titanium Ti6Al4V alloy powders. Titanium scaffolds with different properties and structure were manufactured with this technique using appropriate conditions, notably laser power and laser beam size. The purpose of such elements is to replace the missing pieces of bones, mainly cranial and facial bones in the implantation treatment process. All the samples for the investigations were designed in CAD/CAM (3D MARCARM ENGINEERING AutoFab (Software for Manufacturing Applications) software suitably integrated with an SLS/SLM system. Cube-shaped test samples dimensioned 10×10×10 mm were designed for the investigations using a hexagon-shaped base cell. The so designed 3D models were transferred to the machine software and the actual rapid manufacturing process was commenced. The samples produced according to the laser sintering technology were subjected to chemical processing consisting of etching the scaffolds’ surface in different chemical mediums. Etching was carried out to remove the loosely bound powder from the surface of scaffolds, which might detach from their surface during implantation treatment and travel elsewhere in an organism. The scaffolds created were subjected to micro- and spectroscopic examinations

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