Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós–Graduação em Oceanografia Biológica, Instituto de Oceanografia, 2011. / Submitted by Cristiane Gomides (cristiane_gomides@hotmail.com) on 2013-11-18T16:26:59Z No. of bitstreams: 1 Carla Luciana Teixeira dos Santos.pdf: 553016 bytes, checksum: 84c584008c6c713cd29f554d93509b29 (MD5) / Approved for entry into archive by Angelica Miranda (angelicacdm@gmail.com) on 2013-11-18T19:43:03Z (GMT) No. of bitstreams: 1 Carla Luciana Teixeira dos Santos.pdf: 553016 bytes, checksum: 84c584008c6c713cd29f554d93509b29 (MD5) / Made available in DSpace on 2013-11-18T19:43:03Z (GMT). No. of bitstreams: 1 Carla Luciana Teixeira dos Santos.pdf: 553016 bytes, checksum: 84c584008c6c713cd29f554d93509b29 (MD5) Previous issue date: 2011 / Foi analisada de julho de 2009 a junho de 2010 a variabilidade mensal e sazonal dos organismos incrustantes e perfurantes no estuário da Lagoa dos Patos, utilizando-se como substrato painéis de madeira. O período experimental foi marcado pela ocorrência do fenômeno El Niño (ENSO), tendo a primavera e o verão apresentado valores de salinidade abaixo das médias regionais, o que se refletiu em densidades muito baixas do cirripédio Balanus improvisus, no aparecimento do bivalvo de água doce Limnoperna fortunei, e na ausência de organismos perfurantes. Nestas situações de El Niño os padrões de assentamento e a variabilidade dessas comunidades se dão de maneira diferente da observada em situações de não ocorrência do fenômeno. / Monthly and seasonal variability of both fouling and boring macrobenthic fauna were analyzed from July 2009 to June 2010 inside the Patos Lagoon estuarine region, utilizing pine-wood panels as substrate. Sampling period was marked by the occurrence of an El Niño (ENSO) phenomenon, when spring and summer presented salinity values far below the regional means. This low salinity period determined extremely low densities of the barnacle Balanus improvisus, the occurrence of the fresh water invasive bivalve Limnoperna fortunei and the absence of boring species. Under El Niño situations, patterns of larvae settlement and consequent community variability are very different from that observed in periods of non-occurrence of this stochastic phenomenon.

This diploma thesis deals with the optimization of the production process, namely the assembly of the machine tool. It contains a detailed description of the assembly process and its integration throughout the standard business case. The PERT method is used as the main optimization tool, complemented by a Gantt diagram. The aim is to design a process for more efficient production planning.

The project elaborated within engineering studies. The project is submitting design of technology production of precise holes for rolling bearings which are located in transmission case for the winch. Variants of production technologies were designed based on the construction drawings of transmission case. Chosen type of technology is boring. Boring was performed on the CNC machine DMF 180 produced by DMG MORI. DMF 180 allows precise production of bearings holes. Via selected criteria, it was selected the better variant of two. The criteria were: cylindricality, cohesiveness, position of elements and surface quality.

The master´s thesis deals with the design of the headstock for the horizontal boring center and design of the milling head. In the first part of the thesis, a search is made in the field of boring machines, main parts of boring machine headstock and milling heads. Based on this theoretical analysis, the input parameters for the calculation of the tension, power and torque characteristics of the headstock are selected. Subsequently, the design of the headstock and milling head is done using a 3D model.

Contactless measuring of surface temperature integration in the other measurement methods and their assimilation at evaluation of surface temperature of a semi-finished product bored by various tools is the target of the work. An impassable opening is being bored by these tools. The opening is close to a scanned wall. The semi-finished wall temperatures are being scanned by thermocamera and subsequently compared for every single used tool in this experiment.

This master thesis deals with the engineering design of a headstock floor type boring/milling machine. At first, background research of boring machines and accessories is performed. The type and parameters of the floor type boring machine are chosen according to the background research. In the next part the thesis deals with the individual structural units of the headstock. The thesis also contains a 3D model of the headstock and fine drawing documentation. The 3D model of the horizontal floor type boring machine has been converted into a virtual reality environment.

This thesis deals with lasers, their general theory and application. Then a theoretical part describes laser micromachining and engraving. Experimental part of thesis deals with several experiments performed by powered fibre laser which is not primarily intended for the field of micromachining. Experiments were mainly evaluated by several types of microscopes where the amount of removed material was appraised. By particular experiments removed material was in accordance with used working parameters of laser and a significant role plays machining material. It emerges from the experiments that for the field of laser micromachining and engraving shorter pulses are more suitable (minimal pulse duration was 1 ms in experiment) and it is connected even with a way of removing material. Applied powered laser can be used for micromachining in specific fields of production.

The Diploma’s thesis deals with a construction design of a service platform for a horizontal boring machine. Input parameters are cabin dimensions, length and velocity of lift and shift. In the first part of the thesis is design arrangement solved. The lift is solved by a rack and a pinion. By the lift is drive design and gear calculation performed. Shift of the service platform is done by toothed belt. Air distribution with pneumatic parts choice is included in this thesis. Next part is divided to supporting frame and cabin design. It is made by welded profiles, in which a stress-strength analysis is performed. The last part of the thesis is divided to linear guide design. A part of this thesis is a drawing of an assembly facility and a movie about this service platform in a real service.

My diploma thesis solves project of grinding angle box unit for vertical boring and turning machine which extends technological possibilities of vertical lathe SKD 40/47D. The submitter ČKD Blansko Holding, a.s. demanded to work out assembly drawing, 3 construction drawings and necessary calculations. Spindle drive of grinding unit is implemeted by the aid of engine which is deposit in the sliding machine. Chucking equipment is realised with standart system which is used by ČKD Blansko.

This diploma thesis solves grinding box unit for vertical boring and turning machine for ČKD Blansko. For fixing is used standard fixing system used in ČKD Blansko. Spindle is drived by engine placed in slide ram. Engine can be also used for milling box unit. Grinding box unit must stand operating load. Using of automatic balancing system is also solved in this project.