Direct Slicing Cad Models with Solidworks for Integral Stereolithography System

2010 ◽  
Vol 148-149 ◽  
pp. 818-821 ◽  
Author(s):  
Guang Shen Xu ◽  
Jian Ping Zhang ◽  
Sheng Luo ◽  
Jing Jin
Keyword(s):  
3D Models ◽  
High Accuracy ◽  
System A ◽  
Direct Slicing ◽  
Section Profile ◽  
Dynamic Graphic ◽  
Cad Models ◽  
Slicing Method ◽  
Image Format ◽  
Repair Models

According to the requirements of integral Stereolithography (integral SL) System, a new direct slicing method with SolidWorks for integral Stereolithography System is developed. Slicing function of SolidWorks is employed to slice CAD models directly, and section image of 3D models can be obtained and saved as image format. Dynamic graphic masks for the integral SL System are created according to the cross-section images that obtained through the slicing method, and then 3D real prototyping can be fabricated conveniently. A 3D cup model is sliced with this method, and the cup prototyping also is built with integral SL System. This experiment shows that direct slicing CAD models with Solidworks can be used for integral SL system, and the method of direct slicing CAD models can improve the efficiency of slicing process. Compared with the STL format files slicing method, the new method does not need to inspect and repair models data, and it can achieve high accuracy of layer section profile. The direct slicing method provides a basis for integral SL system to fabricate objects with high accuracy.

Research of Slicing CAD Models with Pro/TOOLKIT for Integral Stereolithography

2011 ◽  
Vol 321 ◽  
pp. 226-229
Author(s):  
Guang Shen Xu ◽  
Tian You Jing
Keyword(s):  
3D Models ◽  
High Accuracy ◽  
3D Cad ◽  
System A ◽  
Direct Slicing ◽  
Section Profile ◽  
Cad Models ◽  
Slicing Method ◽  
Tower Model ◽  
Image Format

According to the requirements of integral Stereolithography (integral SL) System, a new direct slicing method under Pro/ENGINEER environment is developed. 3D CAD models are sliced with Pro/TOOLKIT in Pro/ENGINEER environment, and section image of 3D models can be obtained and saved as image format. Dynamic masks are produced with the cross-section images which obtained through the slicing method by dynamic pattern generator, and then 3D real prototyping is fabricated conveniently with integral SL System. A 3D tower model is sliced with this method, and the tower prototyping also is fabricated with integral SL System. Compared with the STL format files slicing method, the new slicing method can achieve high accuracy of layer section profile. The direct slicing method provides a new solution for integral SL system to build objects with high accuracy.

High Accuracy Photogrammetry of Historic Rock Art

2016 ◽  
Author(s):  
Marla MacKinnon
Keyword(s):  
National Park ◽  
Rock Art ◽  
Glass Plate ◽  
Measurement Data ◽  
Mining Industry ◽  
3D Models ◽  
High Accuracy ◽  
Heritage Recording

The petroglyphs of Petroglyph Park, Peterborough, created by the Algonquin Peoples between 900 and 1400 A.D., were documented in 1983 by the Heritage Recording Directorate of theGovernment of Canada. With the aim of rerecording the glyphs again at a later date to monitor the conditions and weathering, several sets of photogrammetric stereo pairs were taken of the site using Zeiss UMK and a Wild P-31 film cameras. After this project was completed, the site became designated as sacred and photography was no longer permitted, thus rendering the completion of a second recording of the site all but impossible. Therefore, the photographs taken of these magnificent petroglyphs in the 1980s are the most recent documentation available. Using the ADAMTech Mine Mapping Suite, developed in Perth Australia for the mining industry, I was able to bring these archival photos to life by creating dense 3D models that rival those produced by LiDAR. I used the photos, digitized in Ottawa on a Wehri RM-6 photogrammetric scanner, to create 3D models of the glyphs. A similar Federal project from Writing on Stone National Park in Alberta also used film photogrammetry to record the glyphs at that site in 1982. From these images as well I was able to compile 3D models. It is hoped that by scanning the original glass-plate negatives from the 1980s, and not the film copies, as we have done thus far for both projects, measurement data of even greater accuracy (down to 60um) and density can be achieved.

A 3D Optimized Frequency–Wavenumber (FK), Time–Space Optimized Symplectic (TSOS) Hybrid Method for Teleseismic Wave Modeling

2021 ◽  
Author(s):  
Weijuan Meng ◽  
Dinghui Yang ◽  
Xingpeng Dong ◽  
Jian Ma
Keyword(s):  
High Resolution ◽  
Seismic Wave ◽  
Hybrid Method ◽  
High Efficiency ◽  
Reference Model ◽  
3D Models ◽  
Realistic Model ◽  
High Accuracy ◽  
Memory Requirement ◽  
Time Space

ABSTRACT Although teleseismic waveform tomography can provide high-resolution images of the deep mantle, it is still unrealistic to numerically simulate the whole domain of seismic wave propagation due to the huge amount of computation. In this article, we develop a new three-dimensional hybrid method to address this issue, which couples the modified frequency–wavenumber (FK) method with the 3D time–space optimized symplectic (TSOS) method. First, the FK method, which is used to calculate the semianalytical incident wavefields in the layered reference model, is modified to compute the wavefields efficiently with a significantly low-memory requirement. Second, 3D TSOS method is developed to model the seismic wave propagating in the local 3D heterogeneous domain. The low memory requirement of the modified FK method and the high accuracy of the TSOS method make it feasible to obtain highly accurate synthetic seismograms efficiently. A crust–upper mantle model for P-, SV-, and SH-wave incidences is calculated to benchmark the accuracy and efficiency of the 3D optimized FK-TSOS method. Numerical experiments for 3D models with heterogeneities, undulated discontinuous interfaces, and realistic model in eastern Tibet, illustrate the capability of hybrid method to accurately capture the scattered waves caused by heterogeneities in 3D medium. The 3D optimized FK-TSOS method developed shows low-memory requirement, high accuracy, and high efficiency, which makes it be a promising forward method to further apply to high-resolution mantle structure images beneath seismic array.

Performance of 3D computers and 3D printed models as a fundamental means for spatial engineering information visualization

2014 ◽  
Vol 41 (10) ◽  
pp. 869-877 ◽  
Author(s):  
Gabriel B. Dadi ◽  
Timothy R.B. Taylor ◽  
Paul M. Goodrum ◽  
William F. Maloney
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
3D Models ◽  
The Body ◽  
Information Modeling ◽  
Simple Task ◽  
Great Opportunity ◽  
Cad Models ◽  
Engineering Information ◽  
3D Printed

Engineering information delivery can be a source of inefficient communication of design, leading to construction rework and lower worker morale. Due to errors, omissions, and misinterpretations, there remains a great opportunity to improve the traditional documentation of engineering information that craft professionals use to complete their work. Historically, physical three dimensional (3D) models built by hand provided 3D physical representations of the project to assist in sequencing, visualization, and planning of critical construction activities. This practice has greatly diminished since the adoption of 3D computer-aided design (CAD) and building information modeling technologies. Recently, additive manufacturing (a.k.a. 3D printing) technologies have allowed for three dimensional printing of 3D CAD models. A cognitive experiment was established to measure the effectiveness of 2D drawings, a 3D computer model, and a 3D printed model in delivering engineering information to an end-user are scientifically measured. The 3D printed model outperformed the 2D drawings and 3D computer interface in productivity measures. This paper’s primary contribution to the body of knowledge is identification of how different mediums of engineering information influence the performance of a simple task execution.

A Translator for Converting CAD Models to Second Life

2010 ◽  
Author(s):  
Ratnadeep Paul ◽  
Sam Anand
Keyword(s):  
Virtual Worlds ◽  
Second Life ◽  
Product Life Cycle ◽  
Manufacturing Industry ◽  
Product Information ◽  
Life Cycle Management ◽  
3D Models ◽  
Transfer Product ◽  
Cad Models ◽  
Business Entities

Product Life-cycle Management (PLM) has been one of the single most important techniques to have been developed in the manufacturing industry. The increasing capabilities of internet and the ever increasing dependence of business entities on internet have led to the development of metaverses — internet-based 3D virtual worlds — which act as business platforms where companies display and showcase their latest products and services. This is in turn has led to a demand for development of methods for the easy transfer of data from stand alone PLM systems to the internet based virtual worlds. This paper presents the development of a translator which will transfer product data of 3D models created in CAD systems to an internet based virtual world. This translator uses a faceted-surface approach to transfer the product information. In this work CAD models were converted to a CAD-neutral data format, JT file format, and finally recreated in the metaverse Second Life (SL). Examples of models translated from JT to SL have been presented. A technique known as prim optimization, which increases the efficiency of the translation was also incorporated in the algorithm for the translator. Examples of prim optimization have been provided in the paper.

High-Accuracy and Low-Cost Chamfering System by a Material-Handling Robot –Individual Error Compensation Using Image Processing–

2009 ◽  
Vol 3 (4) ◽  
pp. 465-470 ◽  
Author(s):  
Naoki Asakawa ◽  
◽  
Hidetake Tanaka ◽  
Tomoya Kiyoshige ◽  
Masatoshi Hirao ◽  
...  
Keyword(s):  
Image Processing ◽  
Error Compensation ◽  
Material Handling ◽  
Low Cost ◽  
High Accuracy ◽  
Processing Technology ◽  
Experimental Result ◽  
Robot Hand ◽  
Dimensional Error ◽  
System A

The study deals with an automation of chamfering by a material-handling robot with considering of accuracy and costs. The study focused on automation of chamfering without influence of individual dimensional error of workpiece. A casted impeller usually chamfered with handwork is treated in the study as an example of a workpiece having individual dimensional error. In the system, a file driven by air reciprocating actuator is used as a chamfering tool and image processing technology is used to compensate the dimensional error of the workpiece. The robot hand carries a workpiece instead of a chamfering tool both for chamfering and for material handling. From the experimental result, the system is found effective to chamfer a workpiece having dimensional error automatically.

scholarly journals A fast, efficient direct slicing method for slender member structures

2017 ◽  
Vol 18 ◽  
pp. 213-220 ◽  
Author(s):  
Mark C. Messner
Keyword(s):  
Direct Slicing ◽  
Slicing Method

Part-sourcing in a Global Market

2002 ◽  
Vol 10 (4) ◽  
pp. 325-333 ◽  
Author(s):  
Heather J Rea ◽  
Jonathan R Corney ◽  
Douglas E R Clark ◽  
John Pritchard ◽  
Micheal L Breaks ◽  
...  
Keyword(s):  
Search Engine ◽  
Shape Matching ◽  
3D Models ◽  
Global Market ◽  
Lead Times ◽  
Target Model ◽  
System A ◽  
Original Target ◽  
The One ◽  
Shape Characteristics

The collaborative re-use of design and manufacturing data is one way that e-commerce can significantly reduce costs and lead times of new products in a demanding global market. This paper describes the development of a 3D Internet-based search engine, which will allow designers to locate parts already in production that have a similar shape to a desired 'newly designed' part. The project anticipates a time when manufacturers will post 3D computer-generated models of their product range on the Internet as a means of advertising their production capabilities (i.e., tooling). The models will either be uploaded to, or harvested from anywhere in the world by, the search engine, which will then analyse the models and store relevant feature indices in a database. To use the system a designer would upload a model of the desired part. The search engine then analyses the shape characteristics of the target model and performs a similarity match through a sieving technique as described in this paper. As a result, the designer is presented with a number of parts similar to the one uploaded. The designer may then modify the design to incorporate the closest matching part, or contact the company to quote for the original target model, as a variant of their existing product. The challenge of the research is to identify the key shape characteristics that produce meaningful representations of the 3D models for similarity comparison purposes. After reviewing the current literature on shape matching and describing the system architecture, this paper presents initial results of the matching capabilities of the search engine.

scholarly journals Nonlinear Partial Dierential Equations Model Related to Oxidation Pond Treatment System: A Case Study of mPHO at Taman Timor Oxidation Pond, Johor Bahru

MATEMATIKA ◽  
2018 ◽  
Vol 34 (2) ◽  
pp. 293-311
Author(s):  
Amir Syafiq Syamin Syah Hamzah ◽  
Ali Hassan Mohamed Murid
Keyword(s):  
Computational Algorithm ◽  
Oxygen Demand ◽  
High Accuracy ◽  
Treatment System ◽  
Nonlinear Pdes ◽  
Oxidation Pond ◽  
System A ◽  
Reaction Equations ◽  
Crank Nicolson

This study presents a mathematical model examining wastewater pollutant removalthrough an oxidation pond treatment system. This model was developed to describethe reaction between microbe-based product mPHO (comprising Phototrophic bac-teria (PSB)), dissolved oxygen (DO) and pollutant namely chemical oxygen demand(COD). It consists of coupled advection-diusion-reaction equations for the microor-ganism (PSB), DO and pollutant (COD) concentrations, respectively. The couplingof these equations occurred due to the reactions between PSB, DO and COD to pro-duce harmless compounds. Since the model is nonlinear partial dierential equations(PDEs), coupled, and dynamic, computational algorithm with a specic numericalmethod, which is implicit Crank-Nicolson method, was employed to simulate the dy-namical behaviour of the system. Furthermore, numerical results revealed that theproposed model demonstrated high accuracy when compared to the experimental data.Keywords Oxidation pond; nonlinear PDEs; PSB; implicit Crank-Nicolson.

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