The diploma thesis focuses on a conceptual design of a surface grinding machine. Aim of this work is to analyze current products and create a new design and ergonomic proposal. Result of this work is a concept of a surface grinding machine, that is defined by its progressive form and intuitive operation. The thesis brings a vision and a new solution for a current machine tool design from an ergonomic and technical perspective.

This work has a design character, deals with the design of machine for grinding fiberglass belts. Contains machine design proces, the individual assemblies and the way the machine works. A part of the solution is creating 3D model of machine.

Between approximately 1850 and 1936, the barrel organ was one of the most commonly heard instruments in the streets of New York and the frequent subject of written, visual, and musical accounts created by middle class authors and artists. The instrument's loud, wheezy tunes inspired heated debates that began in the nineteenth century and were often aligned with the broader social upheavals caused by Italian immigration. Despite their frequent differences in perspective, most written accounts characterized organ grinders as poor, uneducated, Italian immigrants. Musical representations of street music developed a similar proclivity to emphasize Italian alterity. As early as the 1850s, it was common to quote popular dance idioms to evoke street music, a trend that continued well into the early twentieth century in Tin Pan Alley songs. These strophic songs offered more elaborate portrayals of organ grinders, mimicking the dialect of Italian immigrants through clipped, misspelled syllables. Street musicians declined in the twentieth century, but such stereotypes continued to resonate strongly within fictive musical portrayals. In Charles Ives' From Hanover Square North, the clashing quotations of a gospel hymn aurally signify the program's commuters and organ grinder, whose music animates the scene similar to a tableau found within Nathaniel Hawthorne's novel The House of Seven Gables. In contrast to Ives' idealistic conception of street music, Charles Cadman's opera The Willow Tree depicts a murderous street musician whose association with pleasant, Italian folk music does little to belie his unstable actions. Mayor Fiorello La Guardia's 1936 decision to stop licensing organ grinders created a controversy that may have influenced representations of organ grinders in Marc Blitzstein's I've Got the Tune and the animated short Organ Grinder's Swing. The 1936 controversy suggested that not only were middle class audiences concerned with unprecedented waves of Italian immigration, they were also worried about an urban soundscape increasingly saturated with noise. It was these twin problems that led a class of educated New Yorkers to create meaning by reverting to ethnic, class-based stereotype.

This thesis is focused on determination of the power effects, strength calculation and following optimalization of the box for grain roller mill S 1200 – the prototype of the mill to be produced by the copany ROmiLL, s. r. o. Besides issues mentioned above there ar also stated roller mills worldwide trends as well as results and evaluation of the calculations together witu optimalization of roller mill box.

The connection of craft and architecture is a subject that has interested me since I began my architecture education some seventeen years ago. Although my path led me away from, then back to architecture, craft and making has remained a passion of mine through the years; specifically, the role of the individual craftsman in architecture. It is my contention that as we move further and further into a machine made world, we lose an understanding of, and an appreciation for variation. Everything in our lives is homogenous. People believe that coffee should taste the way that it does at Starbucks, and Starbucks became the monolith that it is by ensuring that their coffee tastes the same no matter where you are in the world. The craftsman never strives for homogeneity or simple duplication; it is anathema to his being. The cabinetmaker knows he will never find two pieces of wood that are the same, and he knows he can never produce two identical products, no matter his skill. He finds joy in this, and he is fulfilled. The barista, given control of the quality of the beansâ roast, the grind, the tamp, and the pressure of the extraction will never make two shots the same. This variation makes every cup a unique experience, and provides an endless opportunity to experiment and refine. I began with a house, and a study of how one generates form in architecture. I ended with a handcrafted coffee mill and portafilter. I utilized the craft of cabinetmaking that I have studied for over a decade, to produce tools for the barista to take full control of his craft. Whether a piece of furniture, or a shot of espresso - what the hands of a skilled craftsman can create when they are given the tools and the freedom to put their skills and intuition to full use, is something extraordinary, something unique, and something exceeding what the best machine can produce under ideal conditions. This is a lesson I strive to always remember, and one I endeavor to pass on to my children. Now more than ever this idea seems very much at risk of extinction. / Master of Architecture

Grâce à l’étude de nombreuses meules rotatives issues de fouilles archéologiques menées ces dernières années dans le Sud-Est de la France, en Languedoc-Roussillon et en Provence, nous pouvons proposer une classification des grands types de moulins à grains employés dans ces régions entre le IVe siècle avant J.-C. et le XIIe siècle après J.-C. Selon les périodes, l’utilisation des moulins manuels a été prédominante ou, au contraire, marginale. Dans ce second cas, des moulins de grand format à usage collectif les ont remplacés. Certains ont fonctionné dans des installations hydrauliques, les autres, tractés par des hommes ou des bêtes, sont notamment illustrés par les moulins pompéiens fabriqués aux environs d’Orvieto en Italie et amplement distribués en Narbonnaise durant l’Empire. Nous examinons aussi les grandes meulières d’où provient une part importante des meules étudiées. L’une d’elles, la meulière de Saint-Quentin-la-Poterie dans le Gard, a laissé de beaux vestiges révélant une organisation très rationnelle de cette exploitation. Datée de l’Antiquité tardive, elle se place à une époque où les meules en grès et en conglomérat ont succédé à celles en roche volcanique presque exclusives dès le deuxième âge du Fer. / Through the study of many rotary grinders from archaeological excavations conducted in recent years in the South East of France, Languedoc-Roussillon and Provence, we propose a classification of major types of grain mills used in these regions between the fourth century BC and the twelfth century AD. According to the period, the hand mills were used substantially or marginally. In this second case, large mills for common use replaced them. Some functionned in hydraulic systems, others towed by men or beasts, are illustrated by the Pompeian mills built in the vicinity of Orvieto in Italy and widely distributed in Narbonne in the Empire. We also examine great millstone quarries from which a significant part of the millstones studied come from. One of them, the millstone quarry of Saint-Quentin-la-Poterie Gard, has left beautiful traces revealing a very rational organization of quarrying. Dating from late antiquity, it ranks at a time when the wheels of sandstone and conglomerate succeeded to those prevailing in volcanic rock in the second Iron Age.

The main goal of this thesis is to compare 5 chosen grinding wheels, that vary by the material and structure. The testing is done in the company SLB, spol. s r.o., using a grinder on the holes BDU 80, which is set to 6 different settings of the grinding cycle, defined by the letters A´, A, B, C, D and E. These settings vary by the cutting conditions and enable to compare the tested grinding wheels by 8 measured parameters of the surface quality of the grinded bearing orbits of outer rings of the SLB 84-74 bearings, that are described by the drawing documentation.

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 this work is to analyze the issue of providing cutting tools for internal use in the company STERCH-INTERNATIONAL s.r.o. It is mainly the production and regrinding of end mills and drills for specific machining applications, whose benefit lies in increased efficiency and flexibility of production, which also brings a significant cost reduction.

The thesis is devoted to assessing the concept of a new solution to the sliding contact in electrical machines. The work is focused mainly on the issue of collector engines, which are almost exclusively used in electric hand tools. Much of the work is devoted to angle grinders, which are usually used in extreme conditions and demands for seamless operation are enormous. In order partial insight into the problems in the introduction are studied phenomena acting on the sliding contact, wear and durability. Then further materials and diagnostic methods for increasing the transfer efficiency brush - commutator brush - ring. The following sections of this thesis is also considered a proposal innovated brush along with the practical verification and evaluation of the suitability of the use of innovative sliding contact.