Adaptive layer approximation of free‐form models using marching point surface error calculation for rapid prototyping

TransPrint is a method for fabricating flexible, transparent free-form displays based on electrochromism. Using screen-printing or inkjet printing of electrochromic ink, plus a straightforward assembly process, TransPrint enables rapid prototyping of displays by nonexperts. The displays are nonlight-emissive and only require power to switch state and support the integration of capacitive touch sensing for interactivity. We present instructions and best practices on how to design and assemble the displays and discuss the benefits and shortcomings of the TransPrint approach. To demonstrate the broad applicability of the approach, we present six application prototypes.

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Thermal Analysis of a New Metal-Deposition Rapid Prototyping Process

Volume 3: 22nd Design Automation Conference ◽

10.1115/96-detc/dac-1129 ◽

1996 ◽

Author(s):

Ronald K. Worth ◽

Philip Barkan

Keyword(s):

Heat Transfer ◽

Finite Difference ◽

Rapid Prototyping ◽

Metal Deposition ◽

Free Form ◽

Transfer Model ◽

Key Innovation ◽

Critical Problems ◽

Key Aspects ◽

Solid Free Form Fabrication

Abstract Rapid prototyping with solid free-form fabrication (SFF) is a key innovation that makes it possible to rapidly produce physical parts directly from a CAD model. Recent research focuses on SFF systems which directly fabricate metal parts. This paper introduces the Stanford Solid Plotter (SSP), a new SFF system that forms prototypes using metal-deposition. Since many critical problems in metal deposition relate to heat transfer issues, the main focus of the paper is on key aspects of the thermal behavior of the SSP part fabrication process, namely the deposition, freezing and cooling of a workpiece. Predictions from a finite difference heat transfer model are used to improve both the precision and strength of actual workpieces made with the SSP. Lab experiments using thermocouples confirm the behavior of the finite difference model.

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Reverse engineering and rapid prototyping for solid free-form fabrication

10.1117/12.213545 ◽

1995 ◽

Cited By ~ 2

Author(s):

James H. Stanley ◽

Robert N. Yancey ◽

Qizhi Cao ◽

Nicolas J. Dusaussoy

Keyword(s):

Rapid Prototyping ◽

Reverse Engineering ◽

Free Form ◽

Solid Free Form Fabrication

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Control of NURBS-Based Surface Error Factor Using a Manufacturing Cost Optimization in Rapid Prototyping Process

IFAC Proceedings Volumes ◽

10.3182/20130619-3-ru-3018.00577 ◽

2013 ◽

Vol 46 (9) ◽

pp. 1560-1565 ◽

Cited By ~ 1

Author(s):

S. Sikder ◽

A. Barari ◽

H.A. Kishawy

Keyword(s):

Rapid Prototyping ◽

Cost Optimization ◽

Manufacturing Cost ◽

Surface Error ◽

Error Factor

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Verification of the Thick Layered Free-Form Object Fabrication by Visual Simulation

Volume 2: 19th Computers and Information in Engineering Conference ◽

10.1115/detc99/cie-9125 ◽

1999 ◽

Author(s):

Imre Horváth ◽

Zoltán Rusák ◽

György Kuczogi ◽

Johan J. Broek ◽

Joris S. M. Vergeest

Keyword(s):

Rapid Prototyping ◽

Physical Model ◽

Tool Path ◽

Free Form ◽

Physical Concept ◽

Number Of Factors ◽

Process Visualization ◽

Shape Approximation ◽

Concept Modeling ◽

Tool Position

Abstract The process of free-form thick-layered object manufacturing (FF-TLOM) has been developed with the aim of supporting physical concept modeling and rapid prototyping Of large sized, morphologically complex, dominantly free-form industrial engineering products. The FF-TLOM process involves the following activities: (i) morphological segmentation of the CAD model, (ii) tool profile generation, (iii) slicing the segments based on higher order shape approximation, and (iv) tool position and tool path calculation, (v) layer manufacturing, and (vi) assembly of the physical model. Due to the number of factors that influence the decisions, the otherwise highly automated computations must be accompanied by an in-process visualization. This paper proposes a ‘virtual prototyping’ for pre-implementation testing of the actual physical concept modeling and/or rapid prototyping process. It explains the operation of the developed calculation software tools and presents the results of the visualization tools. Based on the visualization of the process and the artifact, possible errors of the physical model can be explored and eliminated, furthermore, parameters of the process can be optimized.

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Rapidly Re-Configurable Mold Manufacturing of Free-Form Objects

Volume 3a: 8th Design for Manufacturing Conference ◽

10.1115/detc2003/dfm-48169 ◽

2003 ◽

Cited By ~ 2

Author(s):

Aditya Kelkar ◽

Bahattin Koc ◽

Rakesh Nagi

Keyword(s):

Calculation Method ◽

Geometric Algorithms ◽

Mold Cavity ◽

Free Form ◽

Uniform Grid ◽

Computer Implementation ◽

Surface Error ◽

Part Geometry ◽

The Face ◽

Part Model

This paper describes geometric algorithms for manufacturing freeform objects using a re-configurable mold system. The proposed process involves a mold block, with n faces, in which the mold cavity is formed. Each face of the mold block holds a uniform grid of pins, which are used to approximate the part surfaces. The geometric algorithms presented in this paper analyze the part and determine the face of mold block from which the part model is approximated best using the pins from that face. By moving these pins in and out of the mold block, the shape of the mold cavity can be configured dynamically to suit the changes in the part geometry. Since the proposed process approximates free-form objects with discrete pins, a surface-error calculation method is also developed to control the accuracy. Computer implementation and examples are also provided in this paper.

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