Purpose – The purpose of this paper is to propose and evaluate the selection materials for selective laser sintering (SLS) process, which used low-volume production in engineering (e.g. light weight machines, architectural modelling, high performance application, manufacturing fuel cell, etc.), medical many others art hobbies, etc.) with a keen focus on meeting customer requirements. Design/methodology/approach work starts understanding optimal process parameters, an appropriate...

Duralumin is an alloy of aluminium which has some unique properties such as high strength to weight ratio, resistance corrosion, light in weight, and more demanding various sectors space craft, marine, chemical industries, co

Purpose – This paper aims to convert surface data directly a three-dimensional (3D) stereolithography (STL) part. The Geographic Information Systems (GIS) available for terrain are the of its surface. It doesn’t have information solid model. need be converted into model making physical models by additive manufacturing (AM). Design/methodology/approach A methodology has been developed make wall and base part tessellates with triangles. program written which gives output in STL file format....

Purpose The purpose of the present work is to develop a methodology for making physical models catchment areas and terrains by rapid prototyping (RP) using geographic information systems (GIS) data. It also intended reduce data loss minimising intermediate translations. Design/methodology/approach GIS area or terrain were directly translated an stereo lithography (STL) file. STL surface was then manipulated in Magics‐RP obtain solid part, which can be downloaded RP machine model...

A stochastic model has been developed for studying the mechanical error in different rapid prototyping (RP) processes. Tolerances and clearances, which cause error, have assumed to be random variables. The coordinates of a point on work surface traced by laser beam or tip extruder head is expressed as function variables involved process. Using unified approach RP processes, fused deposition process analysed. In numerical example, found grid points nozzle tip. three-sigma bands tracing...

Geographical information system (GIS) data in digital elevation model (DEM) format contains surface of terrain on the Earth. This needs to be converted into a 3D faceted file before uploading an additive manufacturing (AM) machine. Commercially available software packages perform this task indirectly by translating and modifying through different formats. paper discusses methodology convert United States Geological Survey (USGS) 7.5-minute 1-degree DEM formats directly stereolithography...

ENGLISH ABSTRACT: Additive manufacturing technology is used to make physical models of terrain using GIS surface data. Attempts have been made understand several other file formats, such as the Surfer grid and ARC/INFO ASCII grid. The in these formats has converted into an STL format that suitable for additive manufacturing. a 3D model by making walls base. In this paper, modelling work extended widely-used formats. Terrain can be created less time at cost, intricate geometries with ease...

Being a thermal energy-based advanced cutting process, the capability of laser beam depends mainly on optical and properties materials to be cut rather than mechanical properties. Highly reflective thermally conductive sheetmetals are known as difficult-to-laser-cut materials. This paper presents an experimental approach investigate optimum parameters, which minimise surface roughness during pulsed aluminium alloy sheet. Robust parameter design has been used for deciding optimal levels...

Abstract The geometrical error in the stereolithography process is analysed using a stochastic approach. This approach based on unified methodology, developed by authors, for studying mechanical different rapid prototyping processes. tolerances and clearances have been assumed to be random variables. coordinates of point resin surface, traced laser beam, are expressed as function In numerical example, has found grid points beam. three-sigma bands plotted when tracing example curves. band...

This paper presents experimental study of laser cutting Aluminium alloy sheet with the aim to optimize multiple quality characteristics such as cut edge surface roughness and kerf deviation, simultaneously. The Taguchi method combined Grey relational analysis has been used for parameter optimization. Principal component entropy measurement have eliminating co-linearity deciding weighting factors, respectively. results indicate considerable improvements in characteristics.

Une méthode a été mise au point afin de produire, par fabrication additive (FA), un modèle physique du Parc national Nanda Devi (PNND), site qui figure sur la Liste patrimoine naturel mondial l’UNESCO, faciliter communication entre les parties interviennent dans gestion conservation ce parc. Les données obtenues SIG fournissent des valeurs d’élévation pour surface terrain uniquement et ne sont pas définies en 3D. Le fichier format DEM ASCII XYZ est converti STL, 3D, avec une base côtés....

A methodology has been developed in this work to design customized cranial implants from computed tomography (CT) scan images for symmetric as well asymmetric defects. The two-dimensional CT were converted into three-dimensional geometric models using software packages. Two cases of cavities at different locations considered implant two approaches. Case 1 is having a cavity while 2 an frontal cavity. 3D reconstructed bone and printed poly-lactic acid (PLA) fused deposition modeling process...