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Giordano, Maria. "Matrici geometriche del decoro architettonico. Photo-Scanning, reverse engineering e processi CAD/CAM." Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/157.
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2009 - 2010La ricerca si applica allo studio di decorazioni compositive a matrice geometrica originate dalle mutevoli combinazioni di forme elementari: la divisione regolare del piano con forme chiuse che lo ricoprono completamente, senza sovrapporsi e senza mai lasciare spazi vuoti. Operando su di esso, si inizia a quantificarlo, individuando ogni sua singola parte: la misurazione conduce alla scomposizione in forme elementari di figure complesse. Nello sviluppo di tali configurazioni, il problema della replica è sempre presente, dalla mera idea progettuale fino alle azioni di restauro, in quanto dalla ripetitività delle singole parti – fondamento del suo stesso esistere – prende origine l’intera composizione. Si è cercato, quindi, a partire da un’attenta analisi delle leggi simmetriche che dettano le logiche generative del disegno ornamentale, per una ben precisa canonizzazione di temi e motivi, di identificare gli schemi geometrici che consentano il controllo razionale della decorazione tramite l’individuazione dei procedimenti della iterazione in serie. Non si restituisce semplicemente il dettaglio così come ci appare, ma la scomposizione teorica dell’opera permette di individuare, nella successiva ricomposizione grafica, la natura e la posizione di ogni singolo elemento: uno sguardo critico che guida a una corretta e realistica riproduzione. I modelli formali tendono a divenire così modelli geometrici, simbolo di una struttura più profonda, che è possibile cogliere con l’aiuto di precisi schemi topologici. Attraverso i casi studio esaminati, ed in particolare in funzione del sistema decorativo riscontrato, è stato possibile individuare procedure metodologiche di rilievo ritenute idonee ad esplicitare il processo geometrico di base al fine di facilitare la successiva fase di replica sia in ambiente digitale che fisico e di favorire una funzionale sistematizzazione dell’ornato. In particolare si è ricorso ad un’innovativa metodologia, detta di photo scanning, che permette l’acquisizione simultanea di nuvole di punti e di texture. E così, nota la legge armonica che domina l’intera composizione, definita dal movimento rigido di un modulo predefinito su di un reticolo piano, la decorazione può facilmente riprodursi partendo dalla semplice unità quale entità che può essere, con l’utilizzo di macchine a controllo numerico, reiterata meccanicamente. La procedura è stata applicata a casi studi idonei per analizzare i principi della ripetibilità in serie e delle operazioni di laboratorio; ciò ha consentito, grazie alla ri-progettazione digitale e alla produzione con gli strumenti della tecnologia a controllo numerico, di codificare la riproducibilità tecnica, immateriale e materiale, del decoro architettonico. Le procedure e le strumentazioni descritte possono essere un potente metodo per il controllo, la verifica e il monitoraggio del decoro architettonico, permettendo di realizzare database metrici interattivi in grado di fornire in qualsiasi momento informazioni sull’oggetto rilevato. Impostare un modello di schedatura dei rivestimenti geometrici costituisce uno strumento di catalogazione funzionale sia alla tutela e alla fruizione del bene immobile, sia alla definizione di un metodo di approccio allo studio dei gruppi di simmetria. Si sarà così in grado di stabilire l’origine degli schemi decorativi, i percorsi di distribuzione, lo sviluppo di tendenze locali. [a cura dell'autore]
IX n.s.
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GALLO, Giuseppe. "Architettura e second digital turn, l’evoluzione degli strumenti informatici e il progetto." Doctoral thesis, Università degli Studi di Palermo, 2021. http://hdl.handle.net/10447/514731.
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La condizione digitale che ha gradualmente ibridato le nostre esistenze, trasformando atomi in bit, si è oggi cementificata sulla nostra società, arricchendone la postmodernità e determinando una nuova liquidità acuitasi con l’avvento di internet. Un momento storico segnato da una nuova maturità del digitale, evidente nel nostro diverso rapporto con i dati, e nella diffusione di metodi di machine learning avanzato, che promettono una nuova capacità di comprensione della complessità contemporanea e nel frattempo contribuiscono alla propagazione dell’apparato tecnico sul mondo. Questi cambiamenti, tanto profondi da toccare la nostra cultura, stanno modificando il nostro modo di interpretare e istituire lo spazio, e quindi di abitarlo: condizioni che hanno sicuramente delle ripercussioni sul progetto di architettura nella sua qualità di attività umana rivolta all’uomo. L’incremento di complessità che ha toccato la nostra disciplina con la postmodernità ha nel frattempo trovato nuovo sostegno nella decostruzione Derridiana, in un momento storico segnato da una grande enfasi sulle opportunità degli strumenti digitali, che abbiamo accolto all’interno della nostra disciplina dapprima esclusivamente come mezzi di rappresentazione e che hanno poi determinato l’emergere di nuovi approcci basati sulle potenzialità inclusive di continuità e variazione. Nessuno tra i protagonisti della prima svolta digitale immaginava probabilmente, gli effetti che la cultura digitale produce oggi sul progetto di architettura, forte di quasi trent’anni di sperimentazioni e cambiamenti, tanto metodologici e formali quanto organizzativi e strumentali, a partire dalla ascesa del BIM sino alle nuove possibilità algoritmiche ben rappresentate dai linguaggi di programmazione visuale e dalle simulazioni numeriche. Strumenti su cui si è concentrato lo slancio verso il digitale, che intanto in architettura ha vissuto una seconda svolta, identificata da Carpo negli approcci progettuali oggi possibili grazie a una nuova disponibilità di dati.
Una condizione che inevitabilmente tocca tanto la scienza quanto l’architettura, e che non è tuttavia sufficiente a descrivere una contemporaneità in cui la tecnica dispiega le ali sull’architettura, incidendo il significato del nostro ruolo all’interno della società. A partire da queste ramificate considerazioni, consapevole della complessità con cui dobbiamo dialogare nel tentativo di ricostruire una visione il più possibile neutrale, storica e organica della fase che l’architettura sta vivendo, è necessario, a mio avviso, un approccio olistico: inclusivo, capace tanto di estendersi fino ad acquisire una prospettiva filosofica, così come di scendere verso il dettaglio tecnico, operativo, metodologico, strumentale e relazionale. Un proposito che cerco di mantenere vivo all’interno di tutto il mio lavoro di tesi, condensazione di tre anni di ricerca, che nelle sue diverse fasi guarda alle mutazioni che la tecnica digitale sta producendo nella società e quindi nel progetto di architettura. Il mio percorso è arricchito da dieci interviste raccolte con importanti protagonisti dell’architettura contemporanea, che ringrazio sin da ora per la loro grande disponibilità. Queste testimonianze mi hanno permesso di toccare con mano le complessità della progettazione contemporanea e rappresentano un polo di questa tesi, ugualmente volta a fornire un’interpretazione storica delle sfide poste in essere dalla contemporaneità e quindi all’identificazione delle responsabilità che dobbiamo assumerci per mantenere l’uomo al centro del nostro fare.The digital condition that has gradually hybridized our lives, transforming atoms into bits, has now cemented itself in our society, enriching post-modernity and determining a new form of liquidity that has sharpened with the advent of the internet. It is a historical moment marked by a new digital maturity, evident in our diverse relationship to data and in the spread of advanced machine learning methods, which both promise a new understanding of contemporary complexity as well as contribute to the propagation of the technical apparatus throughout the world. These changes, so profound as to affect our culture, are changing our way of perceiving space, and therefore of inhabiting it: conditions that undoubtedly have repercussions on architectural design in its capacity as a human activity geared towards human beings. The increased complexity that has touched our discipline with Postmodernism has meanwhile found new support in Derridian deconstruction, in a historical moment marked by great emphasis on the opportunities that digital tools offer. These are means we first welcomed into our discipline exclusively as tools for representation, and ones that then themselves determined the emergence of new approaches based on the inclusive potential of continuity and variation. None of the protagonists of the first digital turn could probably have imagined the effects that digital culture would now be having on architectural design. A digital culture that has become increasingly stronger due to almost thirty years of both methodological and formal experimentation, as well as to organizational and instrumental changes, starting with the rise of BIM to new algorithmic possibilities represented by visual programming languages and numerical simulations. These have been the primary tools of concentration in the push towards digital, a digital which today has reached a second turn in the field of architecture, identified by Carpo in new design approaches that are now possible thanks to the larger availability of data. A condition that inevitably affects both science and architectural design, but which, nevertheless, fails to fully share a contemporaneity where technology spreads its wings as far as architecture is concerned, thus affecting the meaning of our role within society. With these multifaceted considerations as a starting point, and fully aware of how complex the dialogue we must engage in in order to reconstruct a neutral, historical, and organic as possible vision of the phase that architecture is experiencing, it is my opinion a holistic approach must be established by us. One that is both inclusive and capable of expanding to the point of acquiring a philosophical perspective, as well as being able to attend to areas that cover technical, operational, methodological, instrumental, and relational details. This objective is one I have striven to keep alive throughout the three years of my doctoral research, which in its various phases looks at the mutations that digital technology is producing in society and therefore in architectural design. My research is enriched by the inclusion of ten interviews with prominent protagonists of contemporary architecture, for whose time and availability I am grateful. These testimonials allowed me to see the complexities of contemporary design up close and personal, and they represent a central part of this thesis, which equally aims to provide a historical interpretation of the challenges posed by contemporaneity and to identify the responsibilities that we must uphold for human beings to remain at the centre of our work.
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Wong, Francis Seung Yin. "Case-based reasoning for computer-aided inspection process planning /." access full-text access abstract and table of contents, 2005. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-meem-b19887656a.pdf.
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Thesis (Ph. D.)--City University of Hong Kong, 2005."Submitted to Department of Manufacturing Engineering and Engineering Management in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves 164-175).
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Gonçalves, Marco Aurélio da Fontoura. "Geração de programas CNC através da implementação de funções direcionadas às características do processo produtivo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/79836.
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Este trabalho descreve uma metodologia para a geração de programas CNC para otimizar um sistema produtivo. Quanto às informações geométricas, o sistema caracteriza-se por utilizar os ciclos de usinagem que o comando da máquina disponibiliza, por possibilitar a aplicação de ciclos desenvolvidos com recursos de programação parametrizada e por gerar novos ciclos, através de uma linguagem genérica, proposta neste trabalho, em um editor de programação parametrizada. Quanto aos dados tecnológicos, ou seja, as condições de usinagem definidas no código de programação, o sistema permite a otimização dos parâmetros de corte através de um banco de dados com informações realimentadas com resultados obtidos da produção. A análise da viabilidade da metodologia proposta é realizada através da implementação de um protótipo de um sistema dedicado à programação de tornos CNC. O protótipo é composto de aplicativos computacionais desenvolvidos e orientados à otimização do sistema produtivo. A metodologia para geração de funções CAD/CAM foi implementada e testada mostrando resultados eficientes. O protótipo implementado como um conjunto de ferramentas aplicativas integradas é de fácil operação e utilização unindo todos os módulos projetados.This study describes a methodology for the generation of CNC programs to optimize a productive system. Regarding geometrical information, the system is characterized by the use of machining cycles that the machine tool control provides because a allows the application of cycles developed with parameterized programming and by generation of new cycles, through a generic language, proposed in this study on a parameterized programming editor. As for technological data, i.e. the machining conditions set out in the programming code, the system allows the optimization of cutting parameters through a data base with information fed back with results of production. The feasibility analysis of the proposed methodology is accomplished through the implementation of a prototype of a system dedicated to programming CNC lathes. The prototype consists of computer applications developed and oriented to the optimization of the production system. The methodology for the generation of CAD/CAM functions has been implemented and tested showing effective results. The prototype implemented as an integrated set of applicative tools is of easy operation and use connecting all designed modules.
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Oliveira, José Ricardo Menezes. "Contribuição CAD/CAE em análise da confiabilidade do processo de desenvolvimento de produto." Universidade Federal de Pernambuco, 2012. https://repositorio.ufpe.br/handle/123456789/10840.
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Submitted by João Arthur Martins (joao.arthur@ufpe.br) on 2015-03-05T18:05:44Z
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Este estudo apresenta a utilização de recursos CAD e CAE como ferramentas de desenvolvimento de novos produtos com proposição ao aumento dos índices de confiabilidade. Para atingir esta meta buscou-se a implementação de um componente do sistema de conformação mecânica por injeção em uma indústria fabricante de chuveiros elétricos. A aplicação de ferramentas qualitativas detectou as falhas críticas do referido sistema e delimitou uma especificação de projeto para concepção de alternativa de solução. A análise por elementos finitos (FEA), permitiu a construção de um novo modelo de agulha para o molde de injeção em consonância às premissas estabelecidas. Decorrido o período da implantação e ajustes pertinentes coletou-se novas amostras da aplicação prática, cujo objetivo foi comparar aos resultados do sistema convencional. Os resultados consolidados corroboram para um aumento significativo dos critérios de desempenho observados, sobretudo no que concerne às funções taxa de falhas, MTTF, e confiabilidade, permitindo-se inferir que os recursos computacionais, constituem-se como alternativa insofismável para resolução dos problemas projetuais desta natureza.
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Kalina, Adam. "Technologie výroby zadané součásti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231748.
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This document describes the design of new production technology specific part in an engineering company. The specific part is manufactured on a machining center by milling method. To create model was used SolidWorks software and to create CNC program was used SolidCAM program. There is production process created with new and old technologies. There is a comparison of both technologies in conclusion.
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Carlson, Shane A. "Development of a Variational Part Model Using In-Process Dimensional Measurement Error." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1341.pdf.
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Novelli, Daniele. "Rilievo e restituzione della cosiddetta "Casa Colonica" a sud dell'area di Palazzo di Villa Adriana: domande aperte e considerazioni." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17909/.
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La tesi “Restituzione grafica della cosiddetta Casa Colonica a sud dell’area di Palazzo di Villa Adriana” si pone l'obiettivo di fornire una documentazione digitale della cosiddetta Casa Colonica mediante un modello tridimensionale realizzato con il software 3D Leica Geosystems Cyclone e l'estrazione da questo di elaborati tecnici significativi.
La struttura della tesi segue le fasi del processo che a partire dal rilievo porta alla generazione di elaborati bidimensionali di documentazione tecnica di Beni Culturali, articolandosi in tre fasi ben distinte: la prima riguarda la ricerca storica della Villa imperiale, studiando approssimativamente l’intero complesso della villa per poi approfondire il caso di studio; la seconda riguarda la fase di rilievo spiegando la metodologia di rilievo, la strumentazione utilizzata e le varie operazioni svolte per ottenere il rilievo completo sotto forma di nuvola di punti; la terza riguarda la realizzazione degli elaborati: pianta della Casa Colonica; sezione longitudinale e trasversale.
Non è secondaria la parte conclusiva di studio della pianta, per verificare le dimensioni di ogni singolo ambiente riferendole alla maglia compositiva basata sull’unità di misura romana, il piede (pes).
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Owen, John J. IIII. "Economic evaluation and justification of industrial automation." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/24539.
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Tabani, Haroon R. "Application of NC machining of complex surfaces to streamlined extrusion dies." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182523937.
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Ng, Wai-ming Micky. "Orientating, tessellating and direct slicing of 3D CAD models : improving accuracy and efficiency for rapid prototyping process /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19537621.
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West, Aaron P. "A decision support system for fabrication process planning in stereolithography." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/16896.
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Tollander, Sofia. "A Value Proposition for Cloud-Enabled Process Planning." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264389.
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To stay competitive in today’s fast-paced market, manufacturing companies must shorten their time-to-market and decrease their costs by efficiently utilizing their resources. Here, improved software and better software integration throughout the product realization process is considered to be a key enabler. The aim of this thesis work has been to investigate the current workflow in design and process planning to outline a cloud-based application to support these activities. Pains and bottlenecks in these workflows have been identified through interview and field studies at six Swedish manufacturing companies of different sizes, in different industries, and with different operational models. The major areas of improvement were identified whereof one them, the initial activity of understanding customers’ needs, was decided to further focus on. From receiving a request for quotation from the customer to acceptance of an order, the following time-consuming activities were recognized: understand and discuss design intent as well as suggest possible design changes to improve manufacturability, analyze and review 2D drawings and 3D models, and develop order quotations. In this thesis work, a mock-up prototype has been put forward. The intent with this is to bridge a gap that has been identified through the mapping between manufacturers needs and functionality of available CAD/CAM software and the identified areas of improvement from the workflow investigations. The proposed solution, as presented in the mock-up prototype, has been validated together with three of the studied companies. At its current state, further improvements and validations are needed. Nevertheless, if further developed, it has the potential to create value within the entire manufacturing value chain.För att vara konkurrenskraftig på dagens snabbrörliga marknad måste tillverkande företag minska sina tid till marknad och reducera sina kostnader genom att utnyttja sina resurser mer effektivt. Här anses förbättrad programvara och bättre mjukvaruintegration genom hela produktrealiseringsprocessen vara en viktig möjliggörare. Målet med detta arbete har varit att undersöka det aktuella arbetsflödet i design och processplanering för att föreslå en molnbaserad applikation för att stödja dessa aktiviteter. Problem och flaskhalsar i dessa arbetsflöden har identifierats genom intervjuer och fältstudier hos sex svenska tillverkande bolag i olika storlekar, i olika branscher och med olika operativa modeller. De viktigaste förbättringsområdena identifierades varav en, den initiala aktiviteten för att förstå kundernas behov, beslutades att ytterligare fokusera på. Från att ha mottagit en offertförfrågan från kunden till acceptans av en beställning kunde följande tidskrävande aktiviteter identifieras: förstå och diskutera designintention samt föreslå möjliga designändringar för att förbättra tillverkningsförmåga, analysera och granska 2D-ritningar och 3D-modeller, och utveckla ordernoteringar. I det här arbetet har en prototyplösning tagits fram. Avsikten med denna är att överbrygga ett gap som har identifierats genom kartläggning mellan tillverkarens behov och funktionalitet av tillgänglig CAD / CAM-programvara och de identifierade förbättringsområdena från arbetsflödesutredningarna. Den föreslagna lösningen, som presenterades i prototypen, har validerats tillsammans med tre av de studerade företagen. Vid sitt nuvarande tillstånd behövs ytterligare förbättringar och valideringar. Om den vidareutvecklas har den dock potentialen att skapa värde för hela tillverkningskedjan.
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Frydén, Cecilia, and Nadia Omri. "Effektivisering av konstruktörens arbete i produktutvecklingsprocessen med hjälp av 3D-modeller och detaljritningar." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-14037.
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I kursen Examensarbete i integrerad produktutveckling har ett projekt utförts av designingenjörsstudenterna Cecilia Frydén och Nadia Omri våren 2017 på Högskolan i Skövde. Projektet genomfördes i samarbete med konsultföretaget ÅF Industry AB i Skövde och några av deras externa tillverkare. I ÅF:s produkt-utvecklingsprocess ägnar konstruktörerna många timmar åt att framställa tillverkningsunderlag, 3D-modeller och detaljritningar. Tillverkningsunderlagen misstänks innehålla överflödig information som inte används av tillverkarna, vilket innebär att konstruktören ägnar tid åt arbetsmoment i onödan. Av den anledningen vill ÅF att det undersöks vilken information i tillverknings-underlaget som är överflödig och att alternativ på hur det utformas tas fram. Aktionsforskning är den övergripande metodiken som används. Projektet har varit fokuserat på att kartlägga arbetsflödet, identifiera mottagarna av tillverkningsunderlaget och deras behov samt definiera tekniska möjligheter för att generera lösningsförslag på alternativa arbetsmetoder. Lösningsförslagen har utvärderats med både konstruktörer och med mottagarna hos tillverkarna. Utifrån utvärderingarna har ett lösningsförslag valts som består av en 3D-modell med Model Based Definition (MBD) där Product Manufacturing Information (PMI) reducerats och förmedlas tillsammans med en 3D-PDF.This project was made for the Bachelor Degree Project in Product Design Engineering course at the University of Skövde by Cecilia Frydén and Nadia Omri in cooperation with the engineering company ÅF during the spring of 2017. ÅF’s designers spends several hours creating 3D-models and detail drawings as manufacturing information for the manufacturing phase of the product development. Some of this time is suspected to be spent unnecessary since some of the information generated by the designers might not be used during the manufacturing process. The aim of the project is to generate a solution to increase the efficiency of the designer’s workflow while generating Product Manufacturing Information (PMI) without compromising the manufacturer’s understanding of the information. Research upon the product manufacturing information generation and handling was done in order to identify its main issues. Observation and interviews were done in order to identify its users and clarify the main purpose of the manufacturing information. The result provides reduced PMI in the 3D-model and uses a 3D-PDF to communicate the PMI to the manufacturers. This was decided from evaluations with the manufacturers and designers and is believed to improve the communication between them but also to make the designer’s workflow more efficient.
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Poll, Marcia Trojan. "UMA METODOLOGIA PARA AUTOMAÇÃO DO PROCESSO DE CONFORMAÇÃO POR CALANDRAS." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/8084.
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The present work presents the development of a methodology for transforming conventional roll benders of industrial tubes and plates into an equipment with a programmable automatic system for bending parts with fixed and/or changeable rays. A conceptual mechanical project (without details) is presented and computational resources were
implemented for recognition of drawings defined in a system of computer aided design with the objective of automatically generating the task-program, being capable of making the conformation of the projected part. This way, the requirement of programmable operation is
satisfied and the equipment will work according to principles of numerical command machines. Besides that, the proposal considers the necessary adjustment in the machine operational parameters because of the material springback through the image processing extracted from a photo of the conformed part. Thus, the ray executed in the part is recognized and makes it possible to compare it with the projected ray. According to this study, the system
was implemented as an applicative of CAD system for the technique viability analysis and was concluded to be viable, since the programming methodology was implemented
successfully and the results were satisfactory, the user can draw a part in a CAD system and a program CNC is generated for the execution of the part. Other related and important aspects for the development of the methodology are discussed, such as: CNC programming, image
processing, CAD programming systems and the process of mechanical forming to bend tubes or plates.O presente trabalho apresenta o desenvolvimento de uma metodologia para transformar calandras de tubos e chapas convencionais em equipamentos com sistema automático programável para execução de peças com raios fixos e/ou variáveis. É apresentado um projeto mecânico conceitual (sem detalhamento) e são implementados recursos computacionais para reconhecimento de desenhos definidos em sistema de projeto auxiliado por computador com o objetivo de gerar automaticamente o programa-tarefa capaz de executar a conformação da peça projetada. Desta maneira, o requisito de operação programável é satisfeito fazendo com que o equipamento trabalhe segundo os princípios de máquinas CNC. A proposta considera ainda o ajuste necessário nos parâmetros de operação da máquina devido a recuperação elástica do material através do processamento de uma imagem extraída de uma foto da peça conformada. Desta forma, o raio executado na peça é reconhecido e torna-se possível compará-lo com o raio projetado. Conforme demonstra o estudo, para análise da viabilidade técnica da proposta, o sistema foi implementado na forma de aplicativo de sistema CAD e conclui-se ser viável, já que a metodologia de programação foi implementada com sucesso e gerou resultados satisfatórios, onde o usuário desenha uma peça em sistema CAD e um programa CNC para a execução da peça é gerado. Outros aspectos relativos e importantes para o desenvolvimento da metodologia são discutidos, tais como: programação CNC, processamento de imagens, programação em sistemas CAD e processo de conformação mecânica para curvar tubos ou chapas.
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Sturnick, Gerald R. "Integration of computer-aided design techniques into the mechanical product development process /." Online version of thesis, 1989. http://hdl.handle.net/1850/10477.
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Zhu, Feng, and 朱峰. "Visualized CAD modeling and layered manufacturing modeling for components made of a multiphase perfect material." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30073844.
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吳偉明 and Wai-ming Micky Ng. "Orientating, tessellating and direct slicing of 3D CAD models: improving accuracy and efficiency forrapid prototyping process." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31219767.
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Karim, Mohammed R. "An IDEFO representation of a garment manufacturing system design process." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1178127341.
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Weilnau, Gregory P. "A dynamic scheduling monitor for a manufacturing process /." Online version of thesis, 1990. http://hdl.handle.net/1850/10600.
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Baum, Robert Adam. "A tolerance representation scheme for solid models." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/18180.
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Larson, Jonathan Karl. "CAD tool emulation for a two-level reconfigurable cell array for digital signal processing." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Fall2005/j%5Flarson%5F120805.pdf.
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Thibault, William Charles. "Application of binary space partitioning trees to geometric modeling and ray-tracing." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/9142.
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鄺建華 and Kin-wa Kwong. "Computer-aided parting line and parting surface generation in mould design." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31233119.
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Pepin, Faustin. "Obrobitelnost kompresních kol z titanových slitin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230048.
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Nespornou vyhodou počítačem podporované výroby (CAM) je výrazná časová úspora při přípravě obráběcího programu. Asociativita je jedním z řešení, její místo v rámci přípravy výrobku se nachází mezi hlavní konstrukcí a technologií podniku. Pro studium asociativity byl použity CAD/CAM modely kompresoru, který díky své komplexní geomtrii posloužil jaky dobrý příklad. Tato práce se podtrhuje omezené možnosti asociativity, především pokud jde o realizaci obráběcího programu pro součást tvořenou více prvky. Dále v této studii budou prezentovány jisté možnosti zlepšení procesu. Studie asociativity v této práci je zaměřena především na obrábění, tedy její aplikace jsou využívány zejména ve oborech jako je automobilový průmysl, letectví, kosmický průmysl či stavebnictví. Kompresor studovaný v této práci je vyroben ze slitiny titanu Ti-6Al-4V a jedná se o součást využívanou v kosmickém průmyslu. Jelikož se jsou jeho rozměry velmi malé, jsou pro jeho obrábění nezbytné velmi přesné nástroje a vysoké řezné rychlosti. Tato práce představuje odlišné strategie obrábění navrhnuté pro výrobu kompresoru, společně s analýzou výsledků. Po počáteční přípravě výroby následují dvě hlavní etpy : editace programu v CATII V5 a jeho ověření v NCSimul8.
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Peixoto, Simone de Arruda. "Entre cada lugar, em cada momento = desenhos e objetos em sobreposição." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/284455.
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Orientador: Luise WeissDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Artes
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Resumo: Este trabalho é a descrição de um processo criativo, tanto das reflexões teóricas quando da pratica em ateliê. Os procedimentos construtivos utilizados são o desenho e a gravura. No entanto, relacionados a eles, está o pensamento sobre aspectos processuais da fotografia na construção das imagens, através de uma postura documental para a criação de desenhos e através da criação de índices e da captura de imagens, utilizando procedimentos de gravura. Uma coleção de objetos escolhidos em parte pelo acaso, em parte pelo afeto, funciona como ponto de partida de experimentações para a prática artística. Assim, misturam-se as linguagens: desenho, gravura, fotografia e objeto na construção desse trabalho. As imagens representadas fazem parte do meu cotidiano, são detalhes lugares e objetos pessoais em desenhos e gravuras que são sobrepostos sucessivamente, denunciando uma passagem de tempo sobre os acontecimentos do cotidiano. Dessa maneira, os trabalhos não se concluem, permanecem sempre abertos para novas interferências. O texto está organizado em três capítulos: o primeiro "Tocar o Real", estabelece as relações entre o desenho, a gravura e a fotografia; o segundo,"Intimidade e Cotidiano", descreve a coleção de objetos, e como o cotidiano e a intimidade aparecem no trabalho; o terceiro, "Tempo e Presentidade", são considerações sobre as sobreposições de imagens e procedimentos, e como isso sugere temporalidade no trabalho
Abstract: The present work is a description of a creative process, from to the teorethical thinking to the practical work. The technics that are used are drawing and etching, but, in association to it is the thinking about technical aspects of the photography in the creation of images, this is done by the documental standarts of the drawing and by making indexes and capturing imagens from the etching proceedings. A colection of objects, chosen from affection or chance are a starting point for experiences in the practical work. Therefore, etching, drawing, photography and the object are combined in this works creation. The represented images are taken from the daily events, places, objects and details of the every day in drawings that are overlaied successively, showing the time passing from the daily events. Therefore, the works never ends; they stay for ever opened for new interferiences. This text is organized in three chapters: the first chapter "Touching Real" describes the relations among drawing, eacthing and photographie; the second chapter, "The daily and the intimacy" describes the objects collection and the way that the daily events and intimacy appears in this work; the third chapter "Time and presentness"
Mestrado
Artes Visuais
Mestre em Artes
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De, Lapp James Andrew. "Impact of CAD on the submittal process." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/1580.
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The efficiency and accuracy of design is critical for construction success. The realization of design is dependent on complete and coordinated design documents that are finalized through the submittal process. This process involves the transfer of design intent from the architect and engineer to the specialty trade contractor for the production of shop drawings. The use of information technology to increase the ability to meet this intent is not being fully utilized today. A case study was selected on the campus of Texas A&M University to investigate the impacts of CAD on the submittal process. The project was selected because it utilized both hand and CAD methods to produce shop drawings. The data collected included all contract documents, submittals, submittal logs, and interviews with the project participants. A comparative analysis was made between the shop drawings that were completed by hand and those that were done by CAD. An analysis quantified the number of notes and corrections made by the reviewers during the submittal process. A separate analysis was made of the number of errors in the interpretation and transferring of background information from the contract documents in the shop drawing production. Finally, interviews were conducted with the project participants to determine the cost associated with utilizing CAD to produce shop drawings. Although based on a single case study, the data showed that CAD had important impacts on the submittal process. The data suggests that when CAD is used to produce shop drawings, there are significantly less notes or corrections by the reviewers. It also suggests that the electronic transfer of design data from the architect and engineer to the subcontractor can ensure better design accuracy and lower overall project cost.
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Rangan, Ravi M. "Engineering data integration in a discrete part design and manufacturing environment." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/18837.
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Jain, Vikesh. "A platform independent process data exchange mechanism between Java applications and computer aided manufacturing systems." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1081784819.
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黃啓榮 and Kai-wing Wong. "A CAD/CAM system for sheet metal blanking dies." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31210594.
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Sivakumar, Krish. "CAD feature development and abstraction for process planning." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1180038784.
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Sundh, Anders. "Zirconia as a biomaterial for odontological applications : effects of composition and manufacturing processes on fracture resistance." Doctoral thesis, Umeå universitet, Odontologisk materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37578.
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Background: Ceramics have long been amongst the most biocompatible materials known but their mechanical properties have limited their use. During the past few decades zirconia has aroused particular interest as a biomaterial because of its greater flexural strength, fracture resistance and toughness compared to other bioceramics. Technological inventions and developments have made the processing of zirconia-based ceramics possible and thus also the successful processing of dental restorations constructed from this type of material. The properties of zirconia-based ceramics can, however, be affected by, for example, shape, composition, manufacturing processes and subsequent handling. It was, therefore, of particular interest to study in what way recently introduced zirconia-based ceramics intended for odontological applications could be affected by the shape, manufacturing process, composition, grinding and veneering. Methods: By means of newly invented and developed CAM-Software systems with improvements in grinding technology and strategy and hardware technology, cores for single crowns, fixed partial denture (FPD) frameworks and implant-supported abutments and copies were manufactured from a hot isostatic-pressed (HIPed) yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. In addition, zirconia-based ceramics intended for odontological applications but made from other compositions and/or using different manufacturing techniques were studied. The effects were determined of shape, composition, manufacturing process, heat treatment and veneering of the cores/frameworks on the fracture or bending resistance of various types of ceramic single crowns, FPD frameworks and implant-supported abutments and copies. Results: Different thicknesses in different parts of HIPed Y-TZP cores improved the fracture resistance compared with cores of a uniform thickness resulting in a thicker veneer layer. Machining, heat treatment and veneering affected the fracture resistance of the zirconia-based ceramics studied. In addition, the quality of sintering and composition and type of veneering porcelain used influenced the fracture resistance of zirconia-based ceramics. Conclusion: The results obtained indicate that zirconia-based ceramics have the potential for use as a material in odontological applications. The mechanical properties of zirconia ceramics are, however, affected by, among other things, the shape, composition, manufacturing processes and subsequent handling of the material. These findings have to be taken in consideration in the production processes of zirconia-based ceramic restorations. To further improve their function more studies are needed to elucidate the effects of various manufacturing and handling techniques on the properties of zirconia-based ceramics.
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Yang, Shichen. "Development of digital image analysis and stereological techniques to incorporate microstructural information in finite element based simulations." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19137.
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Сивоконь, М. Л. "Розробка методологічних принципів проектування та виготовлення індивідуальних ортезів для ходіння з м’яких пластичних матеріалів." Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/75509.
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Пояснювальна записка виконана на 37 сторінках машинного тексту і включає 26 рисунків, 1 таблиця, 3 додатки, 12 використаних джерел.
Робота присвячена питанню проектування та технології виготовлення виробів медичного призначення, а саме індивідуальних ортопедичних устілок (ортезів стопи для ходіння) з м’яких полімерних матеріалів. На основі аналізу існуючих технологій виготовлення доведено доцільність впровадження технології з використанням CAD/CAM систем. Проаналізовано вплив режимів різання та траєкторій обробки етиленвінілацетату на якість обробленої поверхні.
Мета роботи. Метою роботи є розробка методологічних принципів проектування та виготовлення індивідуальних ортезів для ходіння з м’яких пластичних матеріалів.
Об’єкт дослідження. Технологічний процес виготовлення індивідуальних ортопедичних устілок.
Предмет дослідження. Індивідуальні ортопедичні устілки (ортези).
Методи дослідження. Результати, отримані на основі теоретичних та експериментальних дослідженнях. Тривимірну модель індивідуальних ортопедичних устілок розроблено в спеціалізованому середовищі OrthoModel. Візуалізацію механічної обробки та написання керуючої програми для фрезерного верстату з ЧПК відтворено в середовищі ArtCam.
Наукова новизна отриманих результатів. Набуло подальшого розвитку виготовлення індивідуальних ортопедичних устілок за технологією CAD/CAM.
Практичне значення отриманих результатів полягає в тому, що на основі теоретичних та експериментальних досліджень, були розроблені оптимальні умови механічної обробки м’яких пластичних матеріалів, що забезпечують потрібні параметри точності при механічній обробці індивідуальних ортопедичних устілок.Пояснительная записка выполнена на 37 страницах машинного текста и включает 26 рисунков, 1 таблица, 3 приложения, 12 использованных источников. Работа посвящена вопросу проектирования и технологии изготовления изделий медицинского назначения, а именно индивидуальных ортопедических стелек (ортезов стопы для хождения) из мягких полимерных материалов. На основе анализа существующих технологий изготовления доказана целесообразность внедрения технологии с использованием CAD / CAM систем. Проанализировано влияние режимов резания и траекторий обработки этиленвинилацетата на качество обработанной поверхности. Цель работы. Целью работы является разработка методологических принципов проектирования и изготовления индивидуальных ортезов для хождения из мягких пластичных материалов. Объект исследования. Технологический процесс изготовления индивидуальных ортопедических стелек. Предмет исследования. Индивидуальные ортопедические стельки (ортезы). Методы исследования. Результаты, полученные на основе теоретических и экспериментальных исследованиях. Трехмерную модель индивидуальных ортопедических стелек разработан в специализированной среде OrthoModel. Визуализацию механической обработки и написание управляющей программы для фрезерного станка с ЧПУ воспроизведен в среде ArtCam. Научная новизна полученных результатов. Получило дальнейшего развития изготовление индивидуальных ортопедических стелек по технологии CAD / CAM. Практическое значение полученных результатов заключается в том, что на основе теоретических и экспериментальных исследований, были разработаны оптимальные условия механической обработки мягких пластичных материалов, обеспечивающих необходимые параметры точности при механической обработке индивидуальных ортопедических стелек.
Degree work: 37 pages, 26 figures, 1 table, 3 applications, 12 sources. Main topic of the thesis is design and manufacturing technology of medical products, namely individual orthopaedic insoles (custom orthotics) made of soft polymeric materials. Has been proved the feasibility of technology implementation using CAD / CAM systems based on the analysis of existing manufacturing technologies. The influence of cutting modes and toolpaths of processing of ethylene vinyl acetate materials on the quality of the treated surface is analysed. The aim of the work. The main aim of the work is to develop methodological principles for the design and manufacture of custom orthotics for walking of soft plastic materials. Object of research. Technological process of manufacturing of custom orthotics. Subject of research. Custom orthotics (individual orthopaedical insoles). Method of research. Results obtained from theoretical and experimental studies. The three-dimensional model of custom orthotics is developed in the specialized environment OrthoModel. Visualization of machining and writing of the control program for the CNC milling machine was reproduced in ArtCam. Originality. A new approach to CAD/CAM technology using for development of custom orthotics is suggested. The practical significance of these results is that, based on theoretical and experimental studies, optimal conditions for the machining of soft plastic materials have been developed that provide the required precision parameters for the machining of individual orthopedic insoles.
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余啓明 and Kai-ming Yu. "Dimensioning and tolerancing in geometric modelling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1990. http://hub.hku.hk/bib/B31232450.
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Prado, Victor. "Desenvolvimento de um aplicativo em CAD para auxiliar o processo de fabricação em produtos de caldeiraria para hidrelétricas." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-01022016-162903/.
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O planejamento da fabricação de peças de caldeiraria para hidrelétricas tais como caixa espiral, tubo de sucção e conduto forçado, necessita de bons conhecimentos em caldeiraria e muita experiência na área devido à complexidade dos cálculos, tornando-se uma tarefa trabalhosa e com muitas possibilidades de erros. A seqüência de operações, no entanto, é altamente repetitiva facilitando o desenvolvimento de um sistema computacional de apoio. O trabalho proposto a seguir tem como objetivo apresentar um sistema desenvolvido como um aplicativo em software CAD para auxiliar as tarefas de projetar e fabricar caixa espiral, tubo de sucção e conduto forçado. O sistema colocou o conhecimento técnico da engenharia industrial de hidrogeradores de uma empresa de bens de capital ao alcance de projetistas desta área, de forma a aumentar a produtividade nestas, e em outras atividades similares, minimizando as possibilidades de erro e padronizando os procedimentos de cálculos. Os resultados foram, entre outros, diminuição do tempo de geração das informações para o processo de fabricação, tais como croquis de delineamento e desenhos de montagem, acima de 90% e perda zero de peças na fabricação.The manufacturing process of hydroelectric weld parts, such as spiral cases, draft tubes and penstocks, demands good knowledge and experience in the area due to the calculations needed, revealing to be a difficult work with a high risk of errors. However, the operation sequence is highly repetitive which enables the development of a computational support system. This thesis has the purpose to present a system developed as an application in CAD software to aid the projecting and manufacturing activities of the spiral boxes, draft tubes and penstocks. Such system was disposed to the technical body of an industrial engineering department maintained by a heavy equipment company which manufactures hydro generators, so professionals were able to increase their productivity, being the system also used in similar areas, minimizing possibilities of mistakes and standardizing calculations procedures. Results were, among others, decrease of time needed to develop process information, such as sketch outlines and assembly drawings, above 90% and zero losses on parts production.
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CORDEIRO, Valéria Vital. "Aproveitamento de resíduo de zircônia oriundo do processo CAD/CAM visando aplicação em prótese odontológica." Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1025.
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CNPq
As indicações das cerâmicas odontológicas se devem as propriedades estéticas. O sistema CAD/CAM permite realizar restaurações cerâmicas, gerando uma elevada quantidade de resíduos, na forma de pó, durante o desbaste e fresa da peça cerâmica, que atualmente é descartado. Este trabalho tem por objetivo estudar o reaproveitamento dos resíduos de zircônia obtidos através do sistema CAD/CAM visando sua aplicação em prótese odontológica. Foi estudado o resíduo proveniente da fresagem de blocos comerciais de zircônia estabilizada com 3% de ítria (3Y-TZP), (sistema Zirkonzahn®), o resíduo caracterizado através da determinação da composição química, difração de raios X, determinação de tamanho de partículas e análise térmica diferencial/gravimétrica. O resíduo beneficiado seguiu duas rotas: desaglomeração em moinho de bolas e sem desaglomeração. Ambos os materiais foram utilizados para confecção de corpos de prova de zircônia queimados a 1180oC em seguida infiltrou-se o vidro de lantânio a 1140oC, os corpos para densificação e os corpos confeccionados extraídos das placas comerciais (Zirkonzahn®) foram queimados em temperaturas de 1300, 1400 e 1500oC após sinterização caracterizados com a determinação da porosidade aparente, microscopia eletrônica de varredura, resistência à flexão em três pontos e microdureza Vickers. Observou-se nos resultados que o resíduo é constituído por zircônia estabilizada com 3% de ítria (3Y-TZP) e matéria orgânica. A desaglomeração diminui o tamanho dos agregados e favoreceu o processo de sinterização, os corpos infiltrados não apresentam resistência adequada para infraestruturas, os corpos sinterizados a 1500oC apresentaram porosidade próxima da obtida pelos corpos de referência. A resistência e a microdureza dos corpos do resíduo atingiram o valor máximo de 1079 HV para os corpos com zircônia não desaglomerada (ZSD) e de 1523 HV para os corpos com zircônia desaglomerada (ZCD), após queima a 1500oC.
The use of ceramics in dental prosthesis is due to the aesthetic properties. The CAD/CAM system allows making ceramic restorations, generating a large amount of waste, in powder form, during the roughing and milling cutter of the ceramic piece, which currently is thrown away. The aim of this work is to study the reuse of the waste obtained from zirconia CAD/CAM system for its application in dental prosthesis. It was studied the residue from the milling of commercial stabilized zirconia blocks with 3% of yttria (3Y-TZP). The residue was characterized by chemical composition, X-ray diffraction, particle size and differential and gravimetric thermal analysis. The improvement residue followed two routes: deagglomeration in a ball mill and without deagglomeration. Both materials were used for preparation of specimens of zirconia. It were sintered at 1180oC then infiltrated with lanthanum glass at 1140oC. The infiltrated specimens and the specimens extracted from the commercial blocks (Zirkonzahn ®) were sintered at temperatures of 1300, 1400 and 1500oC.After sintering its were characterized by apparent porosity, scanning electron microscopy, flexural strength in three points and Vickers micro hardness. It was observed in the results that the residue consists of stabilized zirconia with 3% yttria (3Y-TZP) and organic matter. The deagglomeration decreases the size of the aggregates and favored the sintering process. The infiltrated specimens do not have adequate resistance to infrastructures, the sintered bodies to 1500oC presented close porosity obtained by the scanbodies. Resistance and micro hardness of bodies of waste reached the maximum value of 1079 HV for the bodies with no deagglomeration zirconia (ZSD) and 1523 HV for the bodies with zirconia desaglomerada (ZCD), after burning the 1500oC.
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Al-Haddad, Tristan Farris. "PerFORMance: Integrating Structural Feedback into Design Processes for Complex Surface-Active Form." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-111810/.
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Park, M. W. "Integration of process planning and a CAD system using IGES." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382147.
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Lynn, Charity M. "Accuracy models for SLA build style decision support." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16832.
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Neerukonda, Narender. "AUTOMATIC SETUP SELECTION AND OPERATION SEQUENCING FOR COMPUTER-AIDED MANUFACTURING SOFTWARE." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1132668178.
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黃挺 and Teng Wong. "Slicing of 3D CAD models for mould design." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B29875122.
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Dull, Christopher G. "Quantity take-offs during design by the use of CAD." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/22341.
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Williams, Gavin L. "Improving fit through the integration of anthropometric data into a computer aided design and manufacture based design process." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/4328.
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For all types of clothing and body worn technologies it is important to consider how they integrate and interact with the complex shapes that form the unique profile of the human body. This interaction determines the fit of these products and it is often difficult to generate a fit that can simultaneously accommodate these complex shapes. Achieving the correct fit is determined by a number of different factors that must be combined appropriately to create the fit associated with a particular product. This is particularly applicable to Personal Protective Equipment (PPE) to ensure it provides protection while maintaining comfort, mobility and good interaction with the surrounding environment. Integrating suitable anthropometric data into the design and manufacture of this type of clothing plays a critical role in achieving a good fit. By using various processes of Computer Aided Design (CAD) and Computer Aided Manufacture (CAM), the detail contained within these data can be quickly and accurately transferred into physical tools. The aim of this study was to demonstrate and validate a method of enhancing the fit of PPE handwear. This has been achieved through an action research strategy using descriptive and practical research methods. The research tools primarily used are case studies, used to demonstrate how manually collected 2D anthropometric data can be used to generate computer models that represent these data in a 3D form. The products of the case studies are tools that have been introduced into the design and manufacture processes of commercial handwear manufacturing environments. The tools have successfully been used to produce gloves using two different manufacturing methods and been assessed to analyse their fit. An improvement in fit for the gloves has been quantified through user trials to determine the level of increased performance afforded to the wearer. The conclusions drawn from the case studies demonstrate that the integration of anthropometric data and CAD/CAM can greatly influence the fit of handwear and improve the iterative processes of its design. However, the data alone does not achieve this as the added integration of tacit knowledge related to glove design is needed to ensure the correct properties are included to the meet the needs of the target population. The methods developed in the case studies have the potential to be applied to other products where fit and interaction with the human body are important design considerations.
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Bailey, Michael William. "A study of introducing CAD into an existing architectural office." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/23298.
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Yang, Yihong. "Integrated quality control planning in computer-aided manufacturing planning." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-041607-164054/.
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Thesis (Ph. D.)--Worcester Polytechnic Institute.Keywords: In-process inspection; tolerance assignment; tolerance stack-up analysis; quality control planning. Includes bibliographical references (leaves 136-148).
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Xue, Feng, and 薛峰. "Evolutionary computation of geodesic paths in CAD/CAM." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31226978.
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Gontijo, Henrique Dias de Oliveira. ""Automação do processo de detalhamento de torres metálicas via tecnologia CAD"." Universidade Federal de Minas Gerais, 2010. http://hdl.handle.net/1843/PASA-8H5HE3.
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This work presents the design and implementation of a computer system denominated TowerCAD for automation of the detailing process of steel towers structures by integrating CAD (Computer Aided Design), CAE (Computer Aided Engineering) and CAM (Computer Aided Manufacturing) technologies. The TowerCAD system integrates a CAD application and a database. The system, called TowerCAD, is implemented using CAD technology, Object Oriented Programming paradigm (OOP) and Database technologies. The AutoCAD .NET technology, developed to be an AutoCAD programming interface (API), was used to customize AutoCAD and also was applied to develop interfaces for importing and exporting data, for creating commands, for data management and manipulation in the database . The database is accessed by the application through the ADO.NET classes using the standard SQL language for database and the programming language C #. AutoCAD was used as a platform for graphical representation.
An important contribution of this work is the application of concepts and fundaments of the programming architectural standard called MVC (Model-View-Control) in the development of the TowerCAD System. The three layers architecture of MVC to construct users interfaces allows separation among information, visualization and control The Model component represents the data and the respective rules for access and manipulation of the database. The View component, in this case represented by the graphical platform AutoCAD, executes the graphical visualization fo the data according to the user request. The Control interprets the users actions altering or not the state of the Model and of the View. MVC standard assures independence among control, data and
visualization, which allows flexibility int the choice of the graphical platform. Therefore, the same Model (database) can be used in applications developed for different graphical platforms. The database has been design to abstract information obtained from various phases of the manufacturing process of steel towers. Other essential information for the detailing phase are also stored in the database. The data stored in the database can feed back other phases of the process or generate the graphical representation of the detailing using an appropriate graphical platform.The customized comands criated for the TowerCAD application behave in identical manner as the native AutoCAd commands and they can also be triggered by command line,tool bar or pull down menu as in AutoCAD. Besides detailing steel tower components, the system is also able to provide other sub-products such as manufacturing croquis and data files for numerical control CNC machines for fabrication.O presente trabalho apresenta o projeto de desenvolvimento de um sistema computacional, denominado TowerCAD, para automação da etapa de detalhamento do processo de fabricação de estruturas de torres metálicas através da integração das tecnologias CAE (Computer Aided Engineering), CAD (Computer Aided Design) e CAM (Computer Aided Manufacturing). O sistema TowerCAD,que é constituído de um aplicativo CAD e de um banco de dados, detalha uma parte da estrutura denominada perna e foi elaborado considerando o futuro desenvolvimento do detalhamento das outras partes da estrutura. Além da tecnologia CAD, o TowerCAD está sendo implementado com auxílio dos paradigmas da Programação Orientado a Objetos e das tecnologias de Banco de Dados. A tecnologia .NET, desenvolvida também para ser uma interface de programação (API) do AutoCAD, foi utilizada para desenvolver as interfaces para importação e exportação de dados, criação de comandos, gerenciamento, edição e manipulação dos dados no banco de dados. O banco de dados é acessado pelo aplicativo através das classes ADO.NET, a linguagem padrão para banco de dados SQL e a linguagem de programação C#. A plataforma de representação gráfica utilizada é o software AutoCAD. Uma importante contribuição desse trabalho é a utilização de conceitos e fundamentos do padrão/arquitetura MVC (Modelo-Visualização-Controle) no desenvolvimento do sistema TowerCAD. A arquitetura de três camadas do MVC para a interface do usuário permite separar a informação, o controle e a representação gráfica. O componente Modelo, que representa os dados e suas regras de acesso e a manipulação, está armazenado no banco de dados. O componente Visualização, nesse caso será representado pela plataforma gráfica AutoCAD, que apenas executa a apresentação de dados conforme solicitado pelo usuário. O Controlador interpreta as ações do usuário alterando ou não o estado do modelo e de visualização. O padrão MVC garante a independência entre dados e visualização e permite a flexibilização na escolha da plataforma gráfica. Assim, o mesmo Modelo (banco de dados) pode servir para aplicações desenvolvidas em diferentes plataformas gráficas. O banco de dados foi projetado para abstrair as informações oriundas das diversas etapas do processo de fabricação de torres metálicas. Outras informações essenciais para a fase de detalhamento do processo também são armazenados no banco de dados. Os dados armazenados no banco de dados podem realimentar as etapas do processo ou gerar a representação gráfica do detalhamento utilizando a plataforma gráfica escolhida. Os comandos personalizados criados pelo aplicativo CAD atuam de maneira idêntica aos comandos nativos do AutoCAD e podem ser acionados pela linha de comando, barra de ferramenta ou através do menu do AutoCAD. O sistema é ainda capaz de criar outros subprodutos tais como: croquis para fabricação e arquivos de dados para máquinas CNC com controle numérico.
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Matejková, Monika. "Komplexní využití konstrukčních podkladů pro CNC programování turbínových skříní." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229269.
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This thesis aims at designing a solution to the comprehensive use of construction underlying documents for the CNC programming of turbine casings. The introductory part of the thesis contains a description of the CNC programming and CAD/CAM systems. The following is mapping of the current state of the construction underlying documents, and mapping of the situation in the department of technology in Siemens Industrial Turbomachinery, s.r.o., Brno. The further section presents an analysis of the problem that arose when processing and sharing the construction underlying documents with the aim of streamlining the CNC programming process. The closing part presents the evaluation and conclusions for implementation of the proposed solutions.
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Ho, Lee-kin Joe, and 何利堅. "Incorporating GIS and CAD technologies in the modelling of three-dimensional urban landscape of Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B42575229.
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