Thèses sur le sujet « Cncu »
Pour voir les autres types de publications sur ce sujet consultez le lien suivant : Cncu.
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les 50 meilleures thèses pour votre recherche sur le sujet « Cncu ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Parcourez les thèses sur diverses disciplines et organisez correctement votre bibliographie.
1
Dastjerdi, Zahra. « Cellulose Nanocrystals : Renewable Property Modifiers for Pressure Sensitive Adhesives ». Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36649.
Texte intégralRésumé :
Pressure sensitive adhesives (PSAs) are polymeric materials with versatile applications in industrial and consumer products such as protective films, product labels, masking tape, and sticky notes, to name a few applications. World demand for emulsion–based products is on the rise due to worldwide legislation on solvent emissions. In order to completely replace emulsion-based PSAs with their solvent-based counterpart, the property modification of emulsion-based PSAs is required. The use of nanomaterials to modify polymer properties is well established. The aim of this thesis was to use cellulose nanocrystals (CNCs) as property modifiers for emulsion-based PSAs.
CNCs are recognized as a highly efficient reinforcement nanofiller. Owing to their environmentally friendly characteristics, low density, high aspect ratio, non-toxicity, and abundant availability, the application of CNCs in composite materials is gaining increasing attention. In this thesis, the inclusion of CNCs in emulsion-based PSAs was carried out through in situ emulsion polymerization and blending technique. To the best of our knowledge, there is limited information about the synthesis of CNC/PSAs nanocomposites via in situ emulsion polymerization and the evaluation of their mechanical performance.
The addition of CNCs to the polymerization formulation caused latex instability due to the negatively charged surfaces of the CNCs. After numerous attempts to overcome the stability issues, a stable polymerization formulation and protocol were developed. CNC/PSAs were synthesized via in situ seeded-semi batch emulsion polymerization, which is a common commercial production pathway for PSAs. The mechanical performance of the resulting PSA nanocomposite films, namely, shear strength, tack, and peel strength, was evaluated at several CNC loadings. All three PSA adhesive properties were simultaneously enhanced with increasing CNC loading. The inclusion of CNCs into the films increased their hydrophilicity. Consequently, the PSA films’ improved wettability on a stainless steel substrate imparted greater tack and peel strength. The blending of the CNCs with a base latex also led to improved adhesive properties. However, the property modification through blending was not as effective as that for the CNC/PSA films synthesized via in situ emulsion polymerization. Thus, CNCs are safe nanomaterials that have been shown to provide remarkable property enhancement of emulsion-based PSA films at low loadings (1wt%).
2
Claesson, Göran, et Jonas Silverborn. « Multifunktionell CNC-maskin ». Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-24576.
Texte intégral
3
Doody, Aaron L. (Aaron Lee). « CNC router modernization ». Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40405.
Texte intégralRésumé :
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references.
A large-format CNC router has been stored in the Pappalardo Laboratory wood shop for several years in an unusable state. A need assessment determined that it would be cost effective to bring the router online for use in the mechanical engineering curriculum. The router was cleaned and inspected; it was determined that the router was in sound mechanical condition. The stepper motors, control system, and power supply were also functional, but the CNC interface software was outdated. To ensure the long term viability of the router as an effective teaching tool the most cost effective solution was to upgrade the motors, control system, and CNC interface software using a package provided by the original supplier, Techno-Isel Inc. The motors, control system, and software were installed, bringing the router to a fully functional state. Dust and ejected cuttings cause a safety hazard and cleanliness problem when operating the router. An enclosure was designed and installed in order to trap the majority of debris and reduce noise levels in the workspace, and a brief user guide has been compiled to ensure safe and effective usage.
by Aaron L. Doody.
S.B.
4
Hanulík, René. « Řízení CNC pískovačky ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413120.
Texte intégralRésumé :
The diploma thesis clarifies the issue of creating inscriptions on stone slabs. It describes some types of sensors, actuators, their physical principles and possibilities of their use. The work mentions the limitations and specifics of sandblasting, design solutions and implementation of equipment for patternless sandblasting.The functionality of the device is demonstrated and verified on illustrative examples.
5
Chaňo, Patrik. « Hobby CNC frézka ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416606.
Texte intégralRésumé :
This diploma thesis serves as a design and implementation of a hobby CNC milling machine, for the modeling community. The work is conceived as an overview of the most common machining technologies. The following is an introduction to the construction of CNC milling machines and an introduction to the basic components used. Furthermore, the actual design proposals and a description of the implementation of two of them are presented. When designing the machine, emphasis was placed on the lowest possible price and availability of individual components.
6
Persson, Linus, et Natalija Zivanovic. « Picasso : CNC plotter ». Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230244.
Texte intégralRésumé :
In today’s society, CNC machines are used for various purposes.In this project, a CNC plotter is created to analyzehow the performance of the plotter differs when using twodifferent motors: a DC motor controlled by a potentiometerin the horizontal direction and a stepper motor in thevertical direction. A CNC plotter is built and used to dotests in order to answer the research question. The resultsshow that a DC motor with a potentiometer is more precisethan a stepper motor and the mean value of the relative errorsin the vertical direction is always higher. The valuesdiffer with 1 percentage point to 3 percentage points. Thedifference in the performance of the two motors depend onseveral factors and one of the main factors is considered tobe the fact that the stepper motor sometimes skips steps.I dagens samhälle används CNC-maskiner för olika ändamål.I detta projekt skapades en CNC-plotter för att analyserahur plotterns prestanda skiljer sig vid användning avtvå olika motorer: en DC motor kontrollerad av en potentiometeri horisontell riktning och en stegmotor i vertikalriktning. En CNC-plotter byggdes och användes för genomförandeav tester för att kunna svara på forskningsfrågan.Resultaten visar att en DC motor med en potentiometer ärmer exakt än en stegmotor och medelvärdet av de relativafelen i vertikala riktningen är alltid högre. Värdena skiljersig från 1 procentenhet till 3 procentenheter. Skillnaden iprestanda för de två motorerna beror på flera faktorer ochen av huvudfaktorerna anses vara det faktum att stegmotornibland hoppar över steg.
7
Krejčí, Jan. « CNC řízení frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442459.
Texte intégralRésumé :
This diploma thesis deals with rebuild of manual drill-mill machine BF20L into CNC mill machine, 3D model of that and eventual control using PLC. All axes are powered by stepper motors, with encoders, connected to control cards and industrial computer from company Beckhoff. For this control is made full switchboard, supplemented by electrical wiring diagram. Program control along with visualization is made in software TwinCAT 3. Drill-mill machine can be controlled manually or automatically by program.
8
Beránek, Jakub. « Bezpečnost CNC brusek ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382265.
Texte intégralRésumé :
This thesis deals with safety of the CNC grinding machines. The first part of this thesis is focusing on legislative requirements of EU and Czech Republic, which concern with topic of this thesis. The second part of the thesis is focusing on the safety of the chosen grinding machine. The main parts of the machine which are important for safety are described and then the checklists for verification of the safety requirements are made.
9
PERSSON, LINUS, et NATALIJA ZIVANOVIC. « Picasso : CNC plotter ». Thesis, KTH, Mekatronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233002.
Texte intégralRésumé :
In today’s society, CNC machines are used for various purposes. In this project, a CNC plotter is created to analyze how the performance of the plotter differs when using two different motors: a DC motor controlled by a potentiometer in the horizontal direction and a stepper motor in the vertical direction. A CNC plotter is built and used to do tests in order to answer the research question. The results show that a DC motor with a potentiometer is more precise than a stepper motor and the mean value of the relative errors in the vertical direction is always higher. The values differ with 1 percentage point to 3 percentage points. The difference in the performance of the two motors depend on several factors and one of the main factors is considered to be the fact that the stepper motor sometimes skips steps.I dagens samhälle används CNC-maskiner för olika ändamål. I detta projekt skapades en CNC-plotter för att analysera hur plotterns prestanda skiljer sig vid användning av två olika motorer: en DC motor kontrollerad av en potentiometer i horisontell riktning och en stegmotor i vertikal riktning. En CNC-plotter byggdes och användes för genomförande av tester för att kunna svara på forskningsfrågan. Resultaten visar att en DC motor med en potentiometer är mer exakt än en stegmotor och medelvärdet av de relativa felen i vertikala riktningen är alltid högre. Värdena skiljer sig från 1 procentenhet till 3 procentenheter. Skillnaden i prestanda för de två motorerna beror på flera faktorer och en av huvudfaktorerna anses vara det faktum att stegmotorn ibland hoppar över steg.
10
Kovář, Pavel. « Model CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219700.
Texte intégralRésumé :
The master's thesis deals with the basic parts and principles of CNC machines with a focus on a CNC milling machine. There are also comparisons of several CNC machines sold. Furthermore, the project deals with the description of the manipulator, which is situated in laboratory E-132 in area Kolejní 4, Brno. The work also includes a description of the device, which is located in the manipulator model. We can find there a description of the program generating G-code from the image that you create in the editor. The next section describes possible modifications of the manipulator for its reconstruction on a CNC milling machine. The last chapter deals with the description of program developed for controlling the manipulator as a CNC milling machine.
11
Moštěk, Jiří. « Malý CNC stroj ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220350.
Texte intégralRésumé :
This diploma thesis deals with the design and construction of a three-axis CNC machine primarily designed for PCB drilling and production of front panels for various electronic devices. All three axes are driven by stepper motors NEMA 23 which are connected to stepper motor drivers L6470. Processor STM32F407 is used to control the whole machine. The wiring is completed by a LCD display with touchscreen which is used to communicate with user. Data for drilling can be entering manually or via USB inerface. Part of this thesis is the selection of a suitable construction and components, assembling equipment, wiring design of electronic circuits and writing the code to control the machine. Finally, the parameters of the designed device have been measured.
12
Vondrák, Jan. « Technologie CNC frézování ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228933.
Texte intégralRésumé :
Common possibility analysis on milling machine, analysis possibility for programming in workshop oriented milling in system Sinumerik 840D ShopMill. Project alternative manufacturing technology including creation NC programme and technical economic valuation for part of Suspension globular screw in axis X.
13
Drlík, Michal. « Souřadnicová CNC vrtačka ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229482.
Texte intégralRésumé :
This thesis deals with designing and realization of a CNC drill. The body of the thesis is divided into three parts: Firstly, a design of a mechanical construction, secondly, an electronic scheme with its realization using industrial components and lastly, a design of a data export from an application for DPS EAGLE designing to G-KOD formate. The whole process should make drilling of plates with DPS or eventually the whole plate manufacturing more efficient and the quality and accurancy of a whole work should increase.
14
Žák, Petr. « Konstrukce CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231996.
Texte intégralRésumé :
The diploma thesis includes design of vertical CNC milling machine. It also includes research in the field of CNC milling machines on the world market, which is carried out to select the appropriate machine parameters and the structural configuration of the machine. Another part of the thesis deals with the selection of suitable components, design calculations, manufacturing drawings and the 3D model showing the final design solution of proposed machine.
15
Pospíšil, Jiří. « Hobby CNC frézka ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232104.
Texte intégralRésumé :
This diploma thesis serves as experimental proof of real world capabilities of computer designed hobby CNC milling machine with its parts printed on a 3D printer. First half is a brief introduction of CNC technologies to non-professional audience. Second part together with 3D model works as manual to build your own machine. Priority was to keep costs to minimum with decent accuracy still in mind.
16
Kalina, Vladimír. « Malá CNC frézka ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-319489.
Texte intégralRésumé :
The content of this diploma thesis is the design and construction of small vertical CNC milling machines. In the thesis are listed and machines that appear in today's production on the market. The components are designed for tools, for ball screw, linear guide. Parts are attached to the 3D models with vertical machine and drawings of the proposed machinery.
17
Jagoš, Roman. « Konstrukce malé CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230234.
Texte intégralRésumé :
This master´s thesis deals with design of small CNC milling machines and comparing CNC tabletop milling machines in the world market. It is also done design of small CNC milling machine through the use of contemporary and modern trends, used in design of machine tools.
18
Sers, Rickard, et Victor Wiberg. « Konstruktion av CNC-Router ». Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-23611.
Texte intégralRésumé :
AASS (Applied Autonomous Sensor Systems, Centrum för Tillämpade Autonoma Sensorsystem) arbetar med forskning inom autonoma system. Deras stora användningsområden är utveckling av automatiska system till fordonsindustrin samt system till äldrevården. AASS, har ett önskemål om en enklare modell av en CNC fräs för enklare fräsning till bland annat prototyptillverkning. Fokus ska ligga på kostnaden då precisionen inte är av största intresse. Uppdraget innebär att ta fram en konstruktion av en cnc- router med tre axlar med ett arbetsrum på 600x450x150mm. Maskinen ska kunna skära i mjuka material som trä, plaster men även mjukare aluminium. Resultatet är en tre axlig cnc- router som drivs av tre stycken stepmotorer som är kopplade till respektive kulskruv. Cnc routern har ett arbetsrum på cirka 600x450x150mm. Den klarar av skärkrafter på 150N utan att deformationer kommer ge stora felaktiga värden på bearbetad detalj. Konstruktionen består till huvuddel av aluminiumprofiler som finns tillängliga på Örebro universitet. De rörliga delarna består av Quadro Tables som tillverkas av Rollco. Konstruktionen ger en bra lösning till en relativt låg kostnad.AASS (Applied Autonomous Sensor Systems, Center for Applied Autonomous Sensor) works with research in autonomous systems. Their major application is the development of such systems for the automotive industry as well for the elderly. AASS, have a desire for a simple model of a CNC milling machine for milling smaller parts for prototyping. The focus should be on cost when precision is not of great interest. The mission is to develop a design of a CNC router with three axes with a workspace of 600x450x150mm. The machine should be able to cut soft materials such as wood, plastics as well as soft aluminum. The result is a three-axis CNC router which is driven by three stepper motors which are coupled to respective ball screw. The Cnc router has a workspace of about 600x450x150mm. It is capable of cutting with cutting forces up to 150N without deformations that will produce large errors in values of processed detail. The design consists of main body of aluminum profiles available at Örebro University. The movable parts consist of Quadro Tables manufactured by Rollco. The design provides a good solution to a relatively low cost.
19
Kučera, David. « CNC obrábění rotační součásti ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417437.
Texte intégralRésumé :
The diploma thesis concerns CNC machining of rotary part. The first part briefly introduces options of multipurpose CNC machines and robotized workplaces. The main body of the thesis analyses two production departments; one of them operated by a robotic manipulator. The conclusion summarises the accomplished results of the thesis.
20
Buš, Martin. « Návrh hobby CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417754.
Texte intégralRésumé :
This master thesis is focused on design of CNC hobby milling machine.In the first part of master thesis there are brief information about construction of CNC milling machines with varios types of milling machines available on market. After that, is made a selection of suitable machine componets for selected parameters. Futhermore, the masters thesis include a solutions of the component on all axes CNC milling machines.
21
Mitáš, Daniel. « Ovládací rozhraní CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219821.
Texte intégralRésumé :
This project deals with portal-type CNC milling machine design and construction. CNC milling machine should be able to machining light metals and alloys. This document contains description of mechanical components selection, machine frame design and building, design and construction of USB motion control unit and also contains control software description and user manual.
22
Podloucký, Milan. « Konstrukce malého CNC soustruhu ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230138.
Texte intégralRésumé :
The aim of this master thesis is construction a small CNC lathe ideal for small series of mostly minor workpieces or for learning needs. In the first part of the work is carried out general literature search containing turning technology, tools for turning and the allocation of turning machines. There is also retrieval of small lathes located not only in our market. Based on research are selected technical parameters of the machine and carried out construction calculations. Also included is a 3D model of the entire assembly and assembly drawings of machine nodes.
23
Sobotka, Ondřej. « Návrh CNC řídicího systému ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231279.
Texte intégralRésumé :
The thesis describesthedesign of a controlsystemfor CNC applicationswhich do not requiresynchronizedmotionofseveral axis atonce. Thegoaliscompatibilitywith G-codethatallowsyou to controlthedevicewith a Cartesiancoordinatesystem. Withthe use ofthenormal PC to run thesystem and communicate via serial line.
24
Cherepanov, Maksym. « Ruční programovaní CNC strojů ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-317201.
Texte intégral
25
Večeř, Petr. « Konstrukční návrh malé modelářské CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254333.
Texte intégralRésumé :
This thesis deals with the structural design of small model CNC milling machines. The work includes research modeller CNC milling machines available primarily on the Czech market, on whose basis are then selected the appropriate parameters for machine design. The thesis contains further structural calculations, selection of appropriate components, production drawings and 3D model that shows the final solution of constructed facility.
26
Rautava, J. P. (Jori-Pekka). « CNC-jyrsimen tärinän mittaus värinäsensorilla ». Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201710072962.
Texte intégralRésumé :
Tässä työssä tehdään ensin kirjallisuuskatsaus LTE-tekniikan perusteisiin sekä 5G-tekniikan käyttöön ja mahdollisuuksiin IoT-sovellutuksissa. Teoriaosuudessa tarkastellaan mistä osista LTE-tekniikka koostuu ja mitkä ovat keskeisiä asioita LTE-tekniikan mahdollistamassa suuremmassa datan siirtonopeudessa verrattuna 3G tekniikkaan. 5G-tekniikkaan liittyen esitellään 5G:n perusideat ja miksi se mahdollistaa entistä suuremmat datan siirtonopeudet ja pienemmät latenssit kuin 4G-tekniikka. Tämän työn lopussa on esitelty tekemäni IoT-sovellus, jossa CNC-jyrsimestä voidaan mitata tärinäarvoja käyttäen ADIS16227 värinäsensoria, joka on liitetty Raspberry Pi -tietokoneeseen. Lopuksi pohditaan tämän sovellutuksen rajoitteita ja käyttökohteitaIn the beginning of this thesis I make a literature overview of the basics of LTE technology and the possibilities of 5G technology and IoT applications. In the theory part I review what makes LTE technology and what are the key principles that allow greater data rates compared to 3G. The very basics of 5G technology is introduced. I also review why 5G technology allows greater data rates and lower latency compared to 4G technology. In the end of this thesis I present IoT application I have made that allows to examine vibration from CNC milling machine. For measuring the vibration ADIS16227 vibration sensor is connected with Raspberry Pi computer. Finally, I consider what can be done with this IoT application and what constraints it may have
27
Konvičný, Denis. « CNC obrábění součásti hřídel převodovky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417110.
Texte intégralRésumé :
The diploma thesis deals with the production of gearbox shaft components using a CNC machine tool, shaft programming in Tebis 4.0 R8 software, Sinumerik SinuTrain 7.5, and manufacturing accuracy checking using 3D scanning technology, which allows you to compare the CAD model and the scan of the manufactured part.
28
Tmej, Tomáš. « Elektronika a řízení CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417753.
Texte intégralRésumé :
The diploma thesis focuses on the electronics design of a hobby CNC milling machine. There are analysed and described the individual electronic parts and components related to this problematic. Three electronics suggestions are made, these suggestions are compared. Then, one of these variants is selected and implemented. Next, is created a relevant PLC program to control the CNC milling machine with visualization for easy control.
29
Thif, Yaman, et Olle Rendlert. « AUTOMATED INK : CNC Tattooing Robot ». Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279841.
Texte intégralRésumé :
The art of tattooing has been around for centuries in human history and tattoos are still very popular in today’s society. Tattoos serve as a way to, for example, express people’s personalities, religious beliefs, or culture, and its growing popularity may lead to the need for more technological and automated alternatives. In this project, a computer numerical control plotter was built to investigate the possibilities of automation of tattooing, and the project focused on the possible limitations of performance and safety in an automated tattooing machine. The machine was built using two stepper motors connected with an H-Bot configuration that moved a gantry in the X and Y directions. A third stepper motor connected to a lead-screw was mounted on the gantry enabling movement in Z direction. Several tests were conducted in order to examine the performance of the machine. These tests were done using ink and whiteboard markers to draw different geometries on paper and the subject’s arm. The results showed limitations in the size of the tattoo as the machine could only draw on a flat surface and therefore had trouble adjusting to the uneven surface of an arm. The results also showed that the machine had some trouble drawing rounded geometries, such as circles, which meant that the circles, to a certain extent, got an elliptical appearance. It did however draw straight lines accurately. The main factors of this were believed to be a combination of sub-optimal assembly and the stepper motors being too weak to optimally operate with the H-Bot configuration. The safety risks were considered restricted when using a limit switch sensor and carefully calibrating the speed and movement in the Z-axis.Tatueringskonsten har funnits i århundraden och tatueringar är fortfarande mycket populära i dagens samhälle. Tatueringar fungerar bland annat som ett sätt att uttrycka människors personligheter, religion eller kultur. Dess växande popularitet kan leda till ett behov av tekniska och automatiserade alternativ. I detta projekt byggdes en CNC-plotter för att undersöka möjligheterna till automatisering av tatueringar och projektet fokuserade på möjliga begränsningar av prestanda och säkerhet hos en automatiserad tatueringsmaskin. Maskinen byggdes med två stegmotorer anslutna med en H-Bot-konfiguration som flyttade en brygga i X- och Y-riktningarna. En tredje stegmotor ansluten till en ledskruv monterades på bryggan vilket möjliggjorde rörelse i Z-led. Flera tester genomfördes för att undersöka maskinens prestanda. Dessa tester gjordes med hjälp av bläck- och tuschpennor för att rita olika geometriska former på papper och testpersoners armar. Resultaten visade begränsningar i tatueringsstorleken eftersom maskinen bara kunde rita på en plan yta och därför hade problem med att anpassa sig till den ojämna ytan av en arm. Resultaten visade också att maskinen hade vissa problem med att rita runda geometrier, så som cirklar, vilket medförde att cirklarna, till en viss grad, fick ett elleptiskt utseende. Den ritade dock raka linjer med bra noggrannhet. De största anledningarna till detta tros vara en kombination av bristfällig montering och att stegmotorerna var för svaga för att optimalt kunna fungera med H-Bot-konfigurationen. Säkerhetsriskerna ansågs vara begränsade vid användning av en gränslägesgivare och noggrann kalibrering av hastigheten och rörelsen i Z-led.
30
Matoušek, Vojtěch. « Návrh a řízení CNC stroje ». Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218945.
Texte intégralRésumé :
My task was to build a smaller structure triaxial CNC milling. I designed electronics for motion control. The main part is the implementation of the control unit, which will provide control of the machine. The work includes the complete design, PCB design and program description for the uP ARM. The unit can work independently as well as hardware interpolator connected to the PC.
31
Vlček, Michal. « Integrace měření do CNC obrábění ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229070.
Texte intégralRésumé :
This master thesis deals with integration of measuring into process of machining. The object of this work is making summary of using measuring probes, description of the probes working principles and their division by construction and usage. The practical part of this work deals with creation of measuring cycles in softwaru Productivity+ and their implementation to machining cycles in MCV 1210. In the last part, two testing workpieces were created and the economic evaluation of introduction of the probes into machining process was performed.
32
Michele, Jiří. « Konstrukce malé vertikální CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230492.
Texte intégralRésumé :
This diploma thesis designs a small vertical CNC milling machine. The thesis includes selection of suitable structural design of the machine based on market analysis and requirements. The listed components, constructional calculations and 3D model are chosen in order to minimize the costs.
33
Kubiš, Richard. « Analýza minutové sazby CNC strojů ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-231016.
Texte intégralRésumé :
This master’s thesis is focused on analysis of the minute cost rate for CNC machines. It describes cost inputs and a way of including them in the minute cost rate. Further describes creating of mathematical model, minute rates for entire CNC machine and possibilities of using of the minute rate for optimalisation. It points out that no general calculation method is existing and that there are problems with creating certain minute rate and need of individal approach.
34
Ludva, Jan. « Konstrukční návrh portálové CNC frézky ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241719.
Texte intégralRésumé :
This master’s thesis deals with a design of a portal CNC milling machine. The thesis contains a description of milling machine’s single types, analysis of Czech and foreign market and analysis of basic milling machine’s groups. The work includes calculating of cutting forces and moments of a chosen tool, choice of spindle and design of axe’s drive systems. The thesis also includes 3D model of the chosen variant, it’s by a method of final elements and finally drawing documentation.
35
Záveský, Zbyněk. « Návrh nové technologie výroby vybrané součásti ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241668.
Texte intégralRésumé :
This master’s thesis is focused on CNC machines. It deals with the characteristics, description, coordinates, advantages and disadvantages of the CNC machines and utilization of the CAD/CAM software. The next part of this thesis deals with the suggestion for choosing the best technology for milling slots. Milling strategy, cutting processes and cutting conditions are described in this part as well as all the issues concerning the manufacturing of the milling slots.
36
Belkacem, Nouria. « Impact de l'administration des probiotiques sur les infections respiratoires ». Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC195/document.
Texte intégralRésumé :
Les probiotiques font partie du microbiote commensal. Ils ont le potentiel de stimuler la réponse immunitaire intestinale et systémique. Le virus de la grippe est à l’origine de morbidité importante. De plus, il favorise les infections bactériennes secondaires telles que Neisseria meningitidis. Nous nous sommes intéressés à l’étude des mécanismes de protections conférées par la souche Lactobacillus paracasei CNCM I-1518 sur une infection par le virus de la grippe dans un modèle de souris. Nos résultats ont montré que le gavage des souris avec la souche L. paracasei pendant 7 jours avant l’infection grippale a permis une activation des cytokines pro-inflammatoires et un recrutement massif des cellules immunitaires dans les poumons. Cette activation du système immunitaire est responsable après infection grippale d’une meilleure clairance du virus de la grippe et d’une réponse inflammatoire moins importante comparée aux souris témoins. L’administration orale à des souris du peptidoglycane de la souche L. paracasei a permis de retrouver partiellement le phénotype protecteur observé avec la bactérie entière. Les effets protecteurs induits par L. paracasei CNCM I-1518 lui sont spécifiques car l’utilisation de 2 souches L. rhamnosus CNCM I-3690 et L. paracasei CNCM I-3689 n’ont pas conférées aux souris une protection contre la grippe. L’étude de l’impact de la souche L. paracasei CNCM I-1518 sur une infection secondaire par N. meningitidis après infection grippale a montré que le gavage des souris par la souche L. paracasei permet un meilleur état clinique associé à une modulation de la réponse immunitaire et une clairance de l’infection bactérienne secondaire plus efficaceProbiotics are part of the commensal microbiota. They play a potential role in stimulating the intestinal and systemic immune response. Several clinical studies addressed beneficial effect of probiotics against respiratory infections in particular on influenza infections. These infections are responsible for significant morbidity. The burden of flu is also worsened by secondary bacterial infections such as Neisseria meningitidis. In this work, we investigated the mechanisms of protection against influenza infection conferred by Lactobacillus paracasei CNCM I-1518 strain in mice. Our results showed that, L. paracasei consumption allow an early activation of pro-inflammatory cytokines and a massive recruitment of immune cells in the lungs prior to influenza infection. This activation of immune system was associated with a faster clearance of influenza virus after infection. We able to show that feeding mice with purified peptidoglycan from L. paracasei reproduced partially the above mentioned effects observed with L. paracasei bacteria feeding.The protective effects induced by L. paracasei CNCM I-1518 against the flu infection are strain specific as L. rhamnosus CNCM I-3690 and L. paracasei CNCM I-3689, tested under the same conditions did not confer to mice protection against influenza infection. Subsequently, we investigated the impact of L. paracasei CNCM I-1518 on secondary bacterial infection with N. meningitidis following influenza infection. Our results showed that consumption of L. paracasei CNCM I-1518 strain was associated with a better clinical status and a modulation of the immune response with a better clearance of secondary bacterial infection
37
Hau, Chuan-Shou. « Perspectives of computerized numerical control (CNC) machinists on the tasks of CNC machining technology in Taiwan / ». The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487863429095404.
Texte intégral
38
Kongiranda, Ganapathi Changappa, et Erappa Vivek Mandanna Balapanda. « Design Automation For CNC Machining : A case study for generating CNC codes from geometric CAD models ». Thesis, Linköpings universitet, Maskinkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178695.
Texte intégralRésumé :
The intent of the thesis is to automate the generation of computer numerical control (CNC) codes from geometrical computer-aided design (CAD) models. The work is carried out using two machines, the MDX 40A milling machine, and the HAAS VM3 machine. The case study is to determine the potential in automating the code generation process. The empirical findings from the research studies reveal that the manual process for programming the codes for the models pose a challenge of consuming more time using the procedures in computer-aided manufacturing and manual operations performed by a programmer. One crucial factor to meet these requirements is the productivity of the machining process. Design automation for machining is the potent tool to increase productivity in this process. The main methods used in the study to fulfill the main objective of the thesis are addressed. The programming of the code is automated for these two machines and the outcome is compared with the manual approach. The need of automating the codes is to provide better accuracy and efficiency. Further, automation is beneficial as it increases the capability to accommodate the new changes in the design of the model. The conclusion drawn from the results of the study is that the automation for code programming results in increasing the speed of the machining process by reducing time consumption. Though the approach of automating codes is carried out for two machines, the potential of this approach is that the code generation process is not dependant on the post-processor of any specific machineThe Master Thesis (Master of Science degree in Mechanical Engineering)
39
Asato, Osvaldo Luís. « CNCs de arquitetura aberta na manufatura : análise e síntese ». Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-11072018-161822/.
Texte intégralRésumé :
Este trabalho apresenta uma Análise sobre os Comandos Numéricos Computadorizados de Arquitetura Aberta aplicado na automação de Máquina-ferramentas e no uso da manufatura. É realizado uma classificação das Arquiteturas Abertas (em relação ao hardware, software, funcionalidade e flexibilidade) e uma comparação entre os CNC\'s convencionais e os CNC\'s de Arquitetura Aberta.This work presents an Open Architecture CNCs analysis. An Open Architecture classification using hardware, software, functionality and flexibility are presented. A comparison table with conventional CNCs and this new class of CNCs are elaborated.
40
Sghari, Soufien. « Rôle morphogénétique de la crête neurale céphalique au cours du développement précoce de l'oeil ». Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS053/document.
Texte intégralRésumé :
La crête neurale céphalique (CNC) est une structure pluripotente à l'origine de la totalité du squelette de la face et de la voûte crânienne. L'absence de la CNC est associée à des malformations du cerveau antérieur et des défauts oculaires qui reproduisent les malformations congénitales humaines: microcéphalie, holoprosencéphalie, aniridie, chambre antérieure manquante, colobome congénital, désorganisation du cristallin, agénésie des paupières, strabisme précoce (Alward 2000, Creuzet 2009, Williams and Bohnsack 2015). Dans notre étude, l'augmentation hétérochronique de la signalisation Bmp7 au niveau de la plaque préchordale (PPC) a engendré une perturbation de la migration de la CNC associée à une fusion des deux champs oculaires en un seul œil cyclope. Cette cyclopie, contrairement aux études antérieures (Chiang et al. 1996, Golden et al. 1999) est précédée par une perturbation de la constriction apicale au niveau des vésicules optiques (VO) au stade Hamburger-Hamilton (HH) 12 et qui est responsable de l'invagination dorsale des VO et leur séparation du reste du tube neural. Au niveau moléculaire, nous avons enregistré une augmentation de la signalisation Wnt1 très tot après le traitement (2h) dans la CNC. Cette augmentation s'étend rostralement ce qui suggère que Wnt1 pourrait etre impliqué dans la perturbation du développement oculaire. Pour tester cette hypothèse, nous avons tenté des expériences de sauvetage par l'inactivation de la signalisation Wnt1 par ARN interférence. Nous avons observé une amélioration du phénotype mais les yeux sont restés morphologiquement en hypotélorisme, c'est-à-dire trop proches. Des coupes coronales au stade E8 (32-33HH) ont montré que les yeux sont synophtalmiques, deux yeux dans un seul orbite, et sont restés fusionnés au télencéphale. Au niveau moléculaire, nous avons observé aussi une diminution de l'expression de Wnt2b au niveau des VO chez l'embryon cyclope et que cette diminution persiste malgré le sauvetage par Wnt1. Pour comprendre cette signalisation, nous avons tenté une deuxième expérience de sauvetage avec ARN interférence contre Wnt1 et un vecteur plasmidique exprimant Wnt2b dans le tube neural et les VO respectivement. Vers E8 l'embryon ressemble au contrôle mais avec persistance de fusion entre les VO et le télencéphale. L'hybridation in situ a montré une diminution du niveau d'expression de Foxg1 à 12HH dans la partie dorsale des VO au niveau de la frontière entre la partie rostrale du diencéphale et le télencéphale (RD/T) dans les deux tentatives de sauvetage ce qui suggère que ce gène pourrait être impliqué dans la séparation rostrale des VO du télencéphaleCephalic neural crest (CNC) is a pluripotent structure giving rise to entire skeleton of the face and skull. Absence of CNC is associated with forebrain and eye defects that mimic human congénital malformations: microcephaly, holoprosencephaly, aniridia, missing anterior chamber, coloboma, congenital dislocation of the lens, agenesis of eyelid and early strabismus. (Alward 2000 Creuzet 2009, Williams and Bohnsack 2015). In our study, heterochronic increased Bmp7 signaling in the prechordal plate (Pcp), caused disruption of CNC migration associated with fusion of two optical fields into one cyclopic eye. This cyclopia, unlike previous studies (Chiang et al. 1996, Golden et al. 1999), is preceded by a disturbance of the apical constriction in optic vesicles at Hamburger-Hamilton (HH)12 stage witch is responsible for dorsal invagination of OVs and their separation from the rest of the neural tube. At the molecular level, we recorded an increase in Wnt1 expression very early after treatment (2h) in CNC and this increase extends rostrally suggesting that Wnt1 could be involved in the disturbance of eye development. To test this hypothesis, we attempted rescue experiments by inactivating Wnt1 signaling by RNA interference and we observed an improvement of the phenotype but the eyes remained morphologically in hypotelorism, too close,. At E8 (32-33HH) stage the eyes are remained fused to the forebrain and are synophtalmic, two eyes in a single orbit,. We also observed a decrease in Wnt2b expression in OV in the cyclopic embryo and that this decline persists despite Wnt1 rescue. To understand Wnt2b signaling, we attempted a second rescue experience with RNA interference against Wnt1 and a plasmid vector expressing Wnt2b in the CNC and OV respectively. Coronal sections at E8 stage resemble the control but with persistence of dorsal fusion between OVs and telencephalon. In situ hybridization showed a decrease in Foxg1 expression at 12HH in the dorsal part of OVs in the RD/T boundry in the two rescue attempts suggesting that this gene may be involved in the separation of OVs at 12HH stage rostrally from the telencephalon
41
Hejsek, Milan. « Možnosti systému Heidenhain iTNC 530 při programování obráběcích strojů ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229352.
Texte intégral
42
Hjelm, Alexander. « Utveckling av rotationshuvud till CNC-testbänk ». Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-6885.
Texte intégralRésumé :
The thesis was written during an internship at ProCom GmbH in Aachen, Germany. It is a project with the goal to upgrade their already existing three linear axis test bench with two additional rotary axes. The task is to either find an already existing solution or to design, manufacture and install a rotary head on the test bench. The test bench is used to simulate water jet, laser and plasma cutting machines and is designed for internal use by ProCom. It is used to test new developed algorithms of their CNC software but also to test newly developed hardware before it is introduced to the market. The test bench has its axis driven by electrical motors and the additional two rotary axes would also be controlled the same way. The test bench is operated without any process force which means that only its own weight will have to be taken into consideration. The background to this requirement of an extra two axis is that customers are starting to demand a five axis control system for their machines and therefore it must be possible to test and verify the software in a realistic environment. This degree thesis is mostly done with design characteristics and concern from the very start with pre studies, explanation of the machine to the very end of the project with a mounted rotary head. Amoung the proposed rotary heads from the pre-studies, two rotary heads were chosen to go further with to be developed, manufactred and installed. With a modular design, to change between the two heads is possible with only minor effort.
43
Bosco, Bruno, et Jimmy Larsson. « Development of a Rotary CNC System ». Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177373.
Texte intégralRésumé :
The Rotary CNC system is a novel way to position a tool in the XY-plane. The system is meant to be used in areas such as 3D-printing, laser cutting, CNC milling and other rapid prototyping equipment. Benets include lower production cost, less moving parts and a small physical footprint. This thesis has provided a "Proof of Concept" prototype of the Rotary CNC system. It has been shown that the system is a viable alternative to current CNC system designs in the eld of PCB routing.
44
Zhang, Xianzhi. « Process comprehension for interoperable CNC manufacturing ». Thesis, University of Bath, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582547.
Texte intégralRésumé :
Over the last 40 years manufacturing industry has enjoyed a rapid growth with the support of various computer-aided systems (CAD, CAPP, CAM etc.) known as CAx. Since the first Numerically Controlled (NC) machine appeared in 1952, there have been many advances in CAx resource capabilities. The information integration and interoperability between different manufacturing resources has become an important and popular research area over the last decade. Computer Numerically Controlled (CNC) machines are an important link in the manufacturing chain and the major contributor to the production capacity of manufacturing industry today. However, most of the research has focused on the information integration of upper systems in the CAD/CAPP /CAM/CNC manufacturing chain, leaving the shop floor as an isolated information island. In particular, there is limited opportunity to capture and feed shopfloor knowledge back to the upper systems. Furthermore, the part programs for the machines are not exchangeable due to the. machine specific postprocessors. Thus there is a further need to consider information interoperability between different CNC machine and other systems. This research investigates the reverse transformation of the CNC part programmes into higher level of process information, entitled process comprehension, to enable the shopfloor interoperability. A novel framework of universal process comprehension is specified and designed. The framework provides a reverse direction of information flow from the CNC machine to upper CAx systems, enabling the interoperability and recycling of the shopfloor knowledge. A prototype implementation of the framework is realised and utilised to demonstrate the functionalities through three industrially inspired test components. The major contribution of this research to knowledge is the new vision of the shopfloor interoperability associated with process knowledge capture and reuse. The research shows that process comprehension of part programmes can provide an effective solution to the issues of the shopfloor interoperability and knowledge reuse in manufacturing industries.
45
Sprunt, Alexander D. (Alexander Dalziel) 1977. « A three axis CNC router design ». Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/77771.
Texte intégralRésumé :
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.Includes bibliographical references.
A preliminary design of a low-cost, three-axis, computer numerically controlled (CNC) router was completed with the goal of bringing the advantages of numerically controlled machine tools to the woodshop. To reduce cost, a novel single rail design was employed. The number of custom parts was kept to a minimum and, where necessary, every effort was made to minimize manufacturing cost. The novel features of the design include vacuum clamping, the ability to cut joinery at miter angles from 0* to 90*, and force controlled cutting. Many of the components are used quite aggressively (particularly with regard to stiffness), but the accuracy goal of ±0.005 " in X and Y and +0.010" in Z was met.
by Alexander D. Sprunt.
S.B.
46
Eliwi, Roa, et Sheima Eliwi. « The tweeting machine – CNC-PLC interface ». Thesis, KTH, Industriell produktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201711.
Texte intégralRésumé :
The development and use of computerized machining tools and equipment within the manufacturing area has opened the door to an abundance of data. But, there is a need to structure the data, make it generic and accessible and define ways of communication in order to maximize the benefits of its utilization. The Line Information System Architecture (LISA) project aims to create an information architecture which aids in capturing and understanding this data by tackling the above mentioned requirements.This thesis is intended to implement the Tweeting machine concept, tweeting useful machining information during operations. The data will be transferred to the LISA architecture, providing users with the possibility to subscribe to the information. Offering useful and structured real-time data, which can be used to e.g. aid in analyzing and decreasing processing flaws, increasing quality, decision making. The solution has been tested and verified using transport communication protocol (TCP) and open communication protocol (OPC) connections. Which have been applied to the 5-axis machining tool HERMLE C 50 U, in the Department of Production Engineering at the Royale Institute of Technology, Stockholm, Sweden.The thesis report will firstly provide the reader with necessary background information regarding the computerized numerical control (CNC) machine used as well as its configuration. Followed by information regarding OPC, TCP and Industrial Ethernet as well as a run through of the operational software used. The programming of the solution is provided in a relatively detailed manner with the hopes that it will provide a good basis for future development of this implementation.
47
Ratica, Filip. « Rotační součást vyráběná na CNC stroji ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-432712.
Texte intégralRésumé :
The diploma thesis contains an overview of the development of numerical control of machine tools and a historical excursion of the beginnings of numerical control. The work deals with the design and presentation of the component, and then the calculation documentation used to determine the load and safety of the component. After computational and design analysis, the work deals with the design of component production on CNC machines and the technological process of production. Finally, the production of the part is documented and evaluated.
48
Michalíček, Michal. « PREDIKCE PRACOVNÍ PŘESNOSTI CNC OBRÁBĚCÍCH STROJŮ ». Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-234159.
Texte intégralRésumé :
The main research topic of this dissertation thesis deals with the influence of the working accuracy related to large CNC machines on the required workpiece properties. The state-of-the art has constantly been developed and the customer’s requirements directed to manufacturers of the machine tools are increasingly demanding. There is required a high accuracy, reliability, shortening delivery times etc. The manufacturer is expected to fulfill all the customer’s requirements. The machining accuracy is dependent, among others, on the positioning accuracy of a machine tool that represents the position of the cutting tool relative to a workpiece. The accuracy of a particular machine tool is therefore a limiting factor concerned with reaching the highest accuracy and quality of a workpiece. Acceptance test procedures are initially realized within a manufacturing shop floor and then within a customer environment. The main subject of the testing procedures is to verify. basic properties of a machine tool such as basic dimensions of a machine, strokes in all respective coordinates, machine travels and spindle speeds. A machining of a workpiece with a desired precision specified by the customer is also performed. In this thesis, a new methodology to calculate and determine errors concerned with machining on vertical lathes is proposed with the aim of predicting the machining accuracy of CNC machine tools. The objective of this work was to determine the influence of machining accuracy of a CNC machine in connection with a subsequent geometrical accuracy of a workpiece. Considered position of a tool relative to a workpiece will be affected by errors concerned with a kinematical inaccuracy, geometrical errors and errors related to machining forces. A vertical lathe SKIQ 30 produced by TOSHULIN, a.s. has been used as a testing machine on which the proposed methodology has been verified. During processing various calculations in this thesis there has been found out that the machining inaccuracy of the machine – main topic of interest – is influenced by the machining conditions such as cutting conditions, material to be machined and even the setting of working positions of the machine. For instance, a position of the cross slide is determined by a workpiece height and a position of the lathe carriage that is determined by a workpiece diameter and a travel of the slide that is also determined by a workpiece height. It can be stated then that to predict the machining accuracy of work pieces, it is important to know the behavior of the machine in its all range of working envelope. Based on the information acquired about the behavior of the machine, it can be determined an appropriate position for a workpiece setting that allows utilizing the maximum reachable accuracy with respect to the stiffness and geometrical accuracy of the machine tool. An appropriate setting of initial working position may influence the subsequent geometrical accuracy of a workpiece.
49
Kučera, Vítězslav. « Modernizace řídícího CNC systému frézky EMCO ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417576.
Texte intégralRésumé :
This master´s thesis deals with the modernization of the EMCO milling machine control system. The theoretical part is focused on the basic description of CNC machine and current state of EMCO milling machine control system. The main point of this thesis is new control system design for given milling machine, when the proposed variants are described and compared according to construction and price. The one variant is selected that best suits the specified parameters. Also, in the TwinCAT development interface from Beckhoff the new control system is created and described in the end of this work.
50
Rajdl, Filip. « Virtuální zprovoznění výměníku nástrojů CNC stroje ». Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417784.
Texte intégralRésumé :
The Master’s thesis deals with virtual commissioning of the CNC machine tool changer. First deals with current state of knowledge with a systematic analysis of virtual commissioning. The 3D model is created by physical properties, sensors, actuators and control signals. In the last part of this thesis, a PLC program and visualization is created. The programs needed to create a virtual commissioning are jsou NX 12.0 - Mechatronic concept designer, SIMIT Simulation Platform V10.0 a TwinCAT 3.