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检索条件"任意字段=AHFE International Conference on Additive Manufacturing, Modeling Systems and 3D Prototyping"

共 278 条记录，以下是241-250 订阅

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additive manufacturing of architectural models using Fused Layer modeling and 3d-printing

Additive manufacturing of architectural models using Fused L...

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6th international conference on Advanced Research in Virtual and Physical prototyping (VRatP)

作者： Junk, S. Cote, S. Univ Appl Sci Offenburg Dept Business Adm & Engn Offenburg Germany

ISBN: (纸本)9781315817415

Various rapid prototyping methods have been available for the production of physical architectural models for a few years. This paper highlights in particular the advantages of 3d printing and Fused Layer modeling for the production of detailed architectural models. In addition, the current challenges for the creation and transfer of CAAd-data are explained. Furthermore, new methods are being developed in order to improve both the technical and economic boundary conditions for the application of 3dP und FLM. This makes the production of models with very detailed interior rooms possible. The internal details are made visible by dividing the complex overall model into individual models connected by means of an innovative plug-in system. In addition, three case studies are shown in which the developed methods are applied in order to implement detailed architectural models. Finally manufacturing time and costs of the architectural models in the three case studies are compared.

关键词： 3d printers

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Numerical modeling of 3d Printed Electric Machines

Numerical Modeling of 3D Printed Electric Machines

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IEEE international Electric Machines and drives conference

作者： Jerry Waterman Alexander Clucas Timothy B. Costa Yue Zhang Julia Zhang Department of Mechanical Engineering Oregon State University Department of Electrical Engineering and Computer Science Oregon State University Department of Mathematics Oregon State University

ISBN: (纸本)9781479979424

additive manufacturing is opening up new ground for innovations in low-volume production due to faster and cheaper prototyping, reduced lead times, and shorter supply chains. As a result, 3d metal printing may present opportunities for electric machine manufacturing. Also, the interest in the research community in determining the quality, reliability, and performance of 3d printed machines is growing dramatically. This paper analyzes the mechanical performance and reliability of an interior permanent magnet synchronous machine, that uses the additive manufacturing process of 3d printed metal.

关键词： Permanent magnet synchronous machines electric machines Printing, Three-dimensional Three dimensions additive manufacturing Interest Research batch production supply chain Mechanical properties Metals Technological Innovations machine

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3d CAd, CAM and rapid prototyping applied for cam fabrication 6

3D CAD, CAM and rapid prototyping applied for cam fabricatio...

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6th international conference on Advanced Concepts in Mechanical Engineering, ACME 2014

作者： Besnea, daniel Ionascu, Georgeta Avram, Mihai Bogatu, Lucian Spanu, Alina Mechatronics and Precision Mechanics Department "Politehnica" University of Bucharest Romania

ISBN: (纸本)9783038352716

In this paper, a comparison between CNC manufacturing and Rapid prototyping technology (FdM – Fused deposition modeling process), applied for a cam fabrication, is presented. In the products development area, a substantial support is offered by models, as intermediate between product configuration and technology design. The CAd/CAM/CNC technology is a widely used technique for creating prototypes, as well as production parts, using a subtractive type material-removal procedure from a semi-manufactured article. The rapid prototyping (RP) technologies are additive processes, where the part is built up layer by layer until done, directly from the 3d CAd model, within the precision limits of the chosen process. Similarities and differences between these two coexisting computer driven prototyping processes, the subtractive CNC 3 – axes milled part production and the additive RP/ FdM technique, are pointed out for a disk cam manufacturing as sample part. © (2014) Trans Tech Publications, Switzerland.

关键词： Fabrication

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different Strategies for Rapid prototyping of digital Bas-Reliefs

Different Strategies for Rapid Prototyping of Digital Bas-Re...

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3rd international conference on Materials Engineering for Advanced Technologies (ICMEAT)

作者： Carfagni, Monica Puggelli, Luca Univ Florence Dept Ind Engn I-50121 Florence Italy

ISBN: (纸本)9783038350187

In the last decades several computer-based procedures have been devised with the aim of speeding up the 3d reconstruction from a single image in the form of bas-relief. At the same time, the use of rapid prototyping (RP) technology considerably spread enabling quick manufacture of 3d products directly from 3d modelling systems. The present paper presents a few consideration about different possible strategies for bas-reliefs manufacturing by using the main RP techniques (stereolithography (SLA), selective laser sintering (SLS), fused deposition modeling (FdM) and Polyjet/Multi-jet technology). A practical example is used for discussing pros and cons of the different alternatives.

关键词： Bas-Relief Rapid prototyping Techniques Artistic Surfaces

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High Value manufacturing: Advanced Research in Virtual and Rapid prototyping - Proceedings of the 6th international conference on Advanced Research and Rapid prototyping, VR@P 2013

High Value Manufacturing: Advanced Research in Virtual and R...

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6th international conference on Advanced Research in Virtual and Physical prototyping, VR@P 2013

ISBN: (纸本)9781138001374

The proceedings contain 111 papers. The topics discussed include: direct writing of conductive polymer tracks as part of an additive manufacturing process;development of an interchangeable head based on variable section screw applied to desktop 3-d printers;3d printing in graphic design education: educational experiences using fused deposition modeling (FdM) in a Brazilian University;quality assurance and process monitoring of fused deposition modeling made parts;price benchmark of laser sintering service providers;generic build time estimation model for parts produced by SLS;size, shape and flow of powders for use in selective laser sintering (SLS);Production of overhanging structures by dMLS;state-of-the-art review on selective laser melting of ceramics;and review of selective laser melting process parameters for commercially pure titanium and Ti6Al4V.

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Object shaping of polystyrene with a sonotrode 25

Object shaping of polystyrene with a sonotrode

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25th Annual international Solid Freeform Fabrication Symposium " An additive manufacturing conference, SFF 2014

作者： Tilli, J. Fantoni, G. Currenti, S. Razionale, A.V. Department of Civil and Industrial Engineering University of Pisa Italy Research Center "E. Piaggio" University of Pisa Italy

Rapid prototyping methods are often based on additive manufacturing strategies. depending on the application, it can also be considered the use of a removal manufacturing rapid prototyping methodology. In this paper the authors investigate the possibility of using the ultrasound technology for the shaping of materials that can be considered as a final object, or as a rapid manufactured mold for the creation of prototypes. In this case, free-form objects can be manufactured starting from foam like materials, and model the foam through the use of a ultrasonic horn thus shaping the desired features. The authors tested the possibility of implementing the technology onto automated systems, allowing considering the use of this system on automated manufacturing lines. Geometrical deviations from the 3d model are measured and material morphology before and after machining is analyzed. © SFF *** rights reserved.

关键词： Rapid prototyping

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Structure development during additive manufacturing

Structure development during additive manufacturing

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6th international conference on Advanced Research in Virtual and Physical prototyping (VRatP)

作者： Tojeira, A. Biscaia, S. Viana, T. Bartolo, P. J. Mitchell, G. R. Polytech Inst Leiria Ctr Rapid & Sustainable Prod Dev Marinha Grande Portugal

ISBN: (纸本)9781315817415

additive manufacturing involves the shaping of a product through the use of a liquid phase which is subsequently transformed to the solid state by cooling or through the use of chemical cross-linking reactions. Of particular note is the fused deposition modeling which utilizes semi-crystalline polymers such as poly(e-caprolactone) or poly(lactic acid) and has been employed in CdRsp to prepare highly porous scaffolds for Tissue Engineering. We show that the crystallization process amplifies small levels of molecular anisotropy introduced in the additive writing process. We show that the level of anisotropy is significantly dependent on the process parameters such as temperature, write speed, and flow rate. The differences in the crystalline morphology introduced by changing these process parameters will have a marked impact on the mechanical properties. This in turn will alter the growth of tissue on such scaffold structures. As with other polymer processing procedures, tuning the process parameters provides a route to controlling and defining the structure and morphology of the scaffold and the properties exhibited by that scaffold.

关键词： 3d printers

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LIGHTWEIGHT MICRO LATTICES WITH NANOSCALE FEATURES FABRICATEd FROM PROJECTION MICROSTEREOLITHOGRAPHY

LIGHTWEIGHT MICRO LATTICES WITH NANOSCALE FEATURES FABRICATE...

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27th IEEE international conference on Micro Electro Mechanical systems (MEMS)

作者： Zheng, Xiaoyu deotte, Joshua Vericella, John Shusteff, Maxim Weisgraber, Todd Lee, H. Fang, N. Spadaccini, Christopher M. Lawrence Livermore Natl Lab Livermore CA 94550 USA MIT Dept Mech Engn Cambridge MA 02139 USA

ISBN: (纸本)9781479935086

Complex, three-dimensional lightweight cellular materials inspired by nature, such as honeycomb and foam-like structures are desirable for a broad array of applications such as structural components, catalysts supports and energy efficient materials. Additionally, when designed with interconnected porosity, the open volume in the architecture can be exploited for active cooling or energy storage, providing unique opportunities for multifunctionality. However, they are extremely difficult to fabricate with the current state-of-the-art fabrication techniques. This paper reports the fabrication of complex, three-dimensional cellular materials with nanoscale features using a novel additive manufacturing approach, namely Projection Microstereolithography (P mu SL)

关键词： honeycomb structures lightweight structures microfabrication rapid prototyping (industrial) stereolithography three-dimensional printing 3d lightweight cellular materials P& #x03BC SL active cooling additive manufacturing approach broad array catalysts supports energy efficient materials energy storage fabrication techniques foamlike structures honeycomb structures interconnected porosity lightweight microlattices nanoscale features projection microstereolithography structural components Computer architecture Fabrication Lattices Microprocessors Polymers Resins

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Improving additive manufacturing by Image Processing and Robotic Milling

Improving Additive Manufacturing by Image Processing and Rob...

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IEEE international conference on Automation Science and Engineering

作者： Faraj Alhwarin Alexander Ferrein Andreas Gebhardt Stephan Kallweit Ingrid Scholl Osmond Tedjasukmana Mobile Autonomous Systems & Cognitive Robotics Institute FH Aachen University of Applied Sciences

ISBN: (纸本)9781467381840

This paper describes an improvement of additive manufacturing (AM) to process products with complex inner and outer geometries such as turbine blades by using a combination of AM, optical measuring techniques and robotics. One problem of AM is the rough surface caused by the layer-by-layer 3d printing with granular material, so the geometries need to be post-processed with milling techniques. To over-come this problem, we implement an inline quality control management to post-process several manufactured layers by a integrated imaging and robotic techniques, especially while the geometries are still accessible. The produced surfaces are measured by an inline stereo vision system and are compared with the real 3d CAd model data. detected differences are translated to movements of a robot arm which then follows the contours to smoothen the surfaces with a milling tool. We show our current state on the 3d imaging, on developing the driver for the deployed robot arm and on a 3d simulation using the Robot Operating System (ROS).

关键词： Robots Three-dimensional displays Blades Solid modeling Geometry Turbines

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A planar fractal analysis of the arterial tree of the human thyroid gland: Implications for additive manufacturing of 3d ramified scaffolds

A planar fractal analysis of the arterial tree of the human ...

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6th international conference on Advanced Research in Virtual and Physical prototyping (VRatP)

作者： Bassoli, E. denti, L. Gatto, A. Spaletta, G. Sofroniou, M. Parrilli, A. Fini, M. Giardino, R. Zamparelli, A. Zini, N. Barbaro, F. Bassi, E. Mosca, S. dallatana, d. Toni, R. Univ Modena & Reggio Emilia Dept Engn Enzo Ferrari DIEF Modena Italy Univ Bologna Dept Math I-40126 Bologna Italy Wolfram Res Champaign Urbana IL USA Rizzoli Orthopaed Inst RIT BITTA Lab Preclin & Surg Studies Lab Bologna Italy Lab Musculoskeletal Cell Biol Bologna Italy CNR IOR Inst Mol Genet Sect Bologna Bologna Italy Univ Parma Sch Med Dept & Museum Biomed Biotechnol & Translat Sci Lab Regenerat Morphol & Bioartificial Struct Parma Italy Tufts Univ Sch Med Tufts Med Ctr Div Endocrinol Diabet & Metab Boston MA 02116 USA

ISBN: (纸本)9781315817415

It is currently known that a number of human vascular systems have a fractal geometry. Since we have recently developed a technique to prototype single arterial branches of human soft tissue organs by additive layer manufacturing (AM), we have explored the possibility that auto-similarity in vessel branching represents a key variable for accurate computational modeling of the organ three-dimensional (3d) macro/microscopic anatomy, and its reproduction by inverse engineering. To this purpose, ramification features of the intralobar arteries of the human thyroidwere studied using injection-corrosion casts of the cadaveric gland. Vessel diameters, ramification angles, and branch lengths were measured by light microscopic, computer-aided optical metrology. distribution of morphological variables was considered on a cumulative basis, and special focus was given to the branching laws. To reduce the bias of vascular distortion due to the pressure of intravascular resin injection, measures were made dimensionless through the use of a scaling parameter set on the vascular caliber of major afferent arteries. In addition, using high resolution microtomography (mCT Skyscan 1172, Bruker microCT) equipped with CTAn software and the Otsu algorithm for segmentation, spaces occupied by vascular branches (referred to as Volume of Interests, VOI) were selected, and their planar fractal dimension calculated. Finally, a computational simulation of the vascular tree was achieved using a mixed, stochastic/deterministic algorithm, based on diffusion limited aggregation (dLA), constrained by mean values of vascular variables. Ratios among decreasing cast calibers, ramification angles, and branch lengths, respectively, were found strictly interrelated, mCT-VOI depicted fractal dimensions, and dLA simulation led to a fractal-like organization consistent with real data morphometrics. In summary, thyroid arterial geometry reliably exhibited a degree of auto-similarity, suggesting that fractalit

关键词： 3d printers

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