No estado do Rio Grande do Sul, estão localizadas importantes regiões de extração e processamento do material gemológico ágata. No Distrito Mineiro do Salto do Jacuí encontram-se as maiores jazidas de ágata do Brasil e do Mundo. No município de Soledade se concentram as principais empresas de beneficiamento e comércio de materiais gemológicos. Apesar da abundância de material, a maioria dos objetos produzidos apresenta baixo grau de inovação, os produtos oferecidos no mercado são muito semelhantes entre si e tem, em comum, a falta de diferencial e de utilização de processos que envolvam tecnologia. A ágata é geralmente exportada em estado bruto ou apresentando baixo grau de aproveitamento. O processamento mais comum, utilizado na maior parte das empresas, é o corte em chapas que posteriormente são lixadas, polidas e tingidas em diversas cores. Entre as empresas pesquisadas no presente estudo apenas uma já utiliza processos envolvendo novas tecnologias. Pode-se afirmar que a pesquisa e estudos que auxiliem em um melhor aproveitamento do material ágata possam representar novas oportunidades de produção de objetos e adornos pessoais (jóias) modificando um cenário onde o design inovador é pouco explorado e apresentado. A metodologia empregada para a realização deste estudo contemplou etapas de conhecimento da realidade dos locais de extração, beneficiamento e comercialização de ágata, avaliação dos processos, ensaio de usinagem convencional CNC, ensaios de usinagem não convencional por jato d’água CNC e desenvolvimento de produtos em formas complexas. Foram realizados vinte e quatro ensaios de usinagem, a análise posterior identifica larguras e espessuras ideais buscando a otimização da matéria-prima. Desta forma foi possível alcançar o objetivo principal nesta pesquisa de realizar o corte de ágata com utilização de tecnologia CNC em peças com formas complexas. / Rio Grande do Sul State, Brazil, has important regions of extraction and processing of agate. Salto Jacuí Mining District, in the central region of this State, is one of the largest and more importante agate’s mines region of Brazil and even of the World. In Soledade town, there are the most important gemstone processing and trade companies of this State. Despite the abundance of gem materials, most of the objects produced in the different companies are very similar and have in common that they seldom are manufactured using new technological processes. Agate is usually exported as raw material or as cut polished slabs which can be dyed in various colors. Among several companies studied in this research, only one uses industrial processes involving new technologies. So, scientifical studies to indicate a better use of agate produced in Rio Grande do Sul, can provide new opportunities for the production of objects and personal ornaments (jewelry), modifying the trade where innovative designs are little explored. The methodology used in this study had several steps: identification of the extraction, processing and trade places of agate; evaluation of the industrial benefit processes used in agate; testing of conventional CNC machining on agate slabs; and testing on agate slabs of non-conventional computer controled machining by water jet cutting (WJC), with development of complex forms agate products. Twenty-four machining tests were carried out, with further analysis identifying ideal widths and thicknesses to optimize the use of agate raw material. With these tests, it was possible to achieve the goal of this study, which is to cut agate using water jet technology, in order to produce agate objects with complex forms.

This master thesis is dealing with the design of the frame and working axis of the desktop milling machine. The theoretical part is in the form of a research of the construction of small machine tools. Practical part concerns the idea for a design of the working axis, as well as the design of the frame construction. Practical part also contains the selection of the main and most important components.

This master’s thesis familiarizes reader with technology of machine grinding – it’s history, principle, general use, related tools, achievable parameters and kinematics of grinding process. The core of work is analysis of jig-grinder Hauser H45-400, it’s kinematics, machine technical data, options and accessories. Work concludes with technical and economical assessment of machining of several parts with this machine and compares results to alternative options of machining.

This diploma thesis was focused on implementation of CNC tool grinder Helitronic Power 400 into serial production on flowing assembly. In the first part, optimization methods were described, which are used in practice as a tool for increasing the productivity and profitability of the company. The practical part was focused on the inclusion of the machine into serial production and on processes connected with the implementation.

The aim of the thesis is focused on the proposal of a new technological procedure of the blade carrier for use in its own production. Currently, the carrier is manufactured by the German company B.Maier Zerkleinerungstechnik GmbH. The work includes several parts. The first part deals with the component itself, its function and importance, as well as its function in the assembly and the whole machine. In the next part the technological procedure of the blade carrier production is created. Fleet of machines including the necessary tools is also designed. In a separate chapter there is an economic evaluation of the proposed solution in two different variants, a subsequent evaluation and a proposal for implementation.

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.

The diploma thesis deals with the design of a new technological process for the production of a spacer ring with a diameter of 212 mm in cooperation with the company Meopta – Optika, s.r.o. The production of this component according to the current process does not comply with the prescribed geometric tolerances of flatness of the face and radius runout with a tolerance field size of 0.005 mm. The work is a detailed analysis of the specified component and describes the current technological process, including the machines on which the spacer ring is manufactured. Based on the knowledge gained from the analysis of the current process, a new technological process was created. During the production according to this process, some geometric tolerances were also exceeded, but the values exceeding the prescribed tolerance field were significantly reduced. The department of production technology found the results to be sufficient and the spacer ring will be produced according to the new technological process. In the last part of the work are the costs of production of components according to both processes.

The diploma thesis deals with the proposal of more effective production process of the feeder holder component in the company MINERVA BOSKOVICE, a.s. The first part of diploma thesis dedicated to the technologies which are used in the production of components. The second part deals with the analysis of the component and its current production process. The third part contains a proposal for a new production process, which contains a description of the machines used for production, a new jig, selected tools, mechanical calculations and technological method. The last part evaluates the current and newly proposed variant of production with their comparison.

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.

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 machine / <p>The Master Thesis (Master of Science degree in Mechanical Engineering)</p>