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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo do processo de laminação de fios de cobre: influência das propriedades mecânicas e da temperatura de processamento / Study of the process of copper wire lamination: influence of the mechanical properties and the temperature of processing

Oliveira, Rodrigo de 26 July 2010 (has links)
Made available in DSpace on 2016-12-08T17:19:36Z (GMT). No. of bitstreams: 1 Capa.pdf: 25477 bytes, checksum: 6c28599cf86569155d0b0fba73768762 (MD5) Previous issue date: 2010-07-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The application of the electrolytic copper rectangular wire to manufacturing of components of electric transformers and generators windings, the dimensions and mechanicals properties are factors of great importance and should be conferred and be assured during the manufacture process. The objective of this work consists of evaluating the influence of the variation of mechanical properties of the raw-material used to manufacture of rectangular wires. The study it was developed with materials of different values of hardness and variation of temperature in the lamination process, to the evaluation of the influences of this properties in the deformation of material. The revision of the chosen bibliography, presents the concepts of manufactures of lamination, strain hardening and annealing of copper, beyond referring information of the copper material, as chemical composition, electrical and mechanicals properties and etc. The methodology presents the lamination of copper material, with known dimensions and different values of hardness of raw-material, to determinate reductions of thickness of material, and was evaluated the behavior of material during the deformation, calculating the parameter of anisotropy (R). . The material processed was evaluated with relation the mechanical behavior (tractive assay) and dimension. After the accomplishment of the experiments and the evaluation of the results, a significant influence of the hardness of the substance can be verified cousin on the behavior of the deformation of the material in the lamination / Para a utilização do fio retangular de cobre eletrolítico na fabricação de componentes de enrolamentos de geradores e transformadores, as dimensões e as propriedades mecânicas são fatores de extrema importância e devem ser conferidas e asseguradas durante o processo de fabricação. O objetivo do trabalho consiste em avaliar a influência da variação das propriedades mecânicas da matéria prima e de processo empregados na fabricação dos fios retangulares. O estudo foi desenvolvido com materiais de diferentes níveis de dureza e variação dos valores de temperatura do processo de laminação, para a avaliação da influência destas propriedades na deformação do material. A revisão bibliográfica apresenta os conceitos dos processos de manufatura de laminação, encruamento e recozimento do cobre, além de informações referentes ao material, como composição química, propriedades elétricas e mecânicas. A metodologia apresenta a laminação do cobre, com dimensões conhecidas, diferentes níveis de dureza e variação da temperatura do processo, sendo realizadas reduções determinadas de espessura e avaliado a deformação do material com o cálculo do parâmetro de anisotropia (R). Tanto para a matéria prima quanto para o material laminado, as características mecânicas e dimensionais, foram avaliadas. Após a realização dos experimentos e a avaliação dos resultados, pode-se verificar uma influência significativa da dureza da matéria prima sobre o comportamento da deformação do material na laminação.
2

Изучение особенностей производства проволоки и шин из кислородосодержащей меди для кабельной промышленности : магистерская диссертация / Study of the peculiar properties of the oxygen-containing copper wire and buses production for the cable industry

Ерёмин, А. В., Yeryomin, A. V. January 2019 (has links)
Предметом исследования является производство прямоугольной медной проволоки для электротехнических целей. Приведен патентно-литературный обзор, включающий в себя некоторые особенности производства медной проволоки, а также способы ее производства, оборудование и инструмент. Представлена общая технологическая схема производства прямоугольной медной проволоки. Также приведена информация, касающаяся схемы напряженного состояния в зоне очага деформации при волочении и конфигурация канала волоки. Помимо вышеприведенной, приведена информация, касающаяся испытаний проволоки на растяжение и анализ их результатов. / The subject of the study is production of rectangular copper wire for electrical purposes. There are patent and literature review which include several features of production of copper wire, methods of production, equipment and tools. Given the general technological scheme of production of rectangular copper wire. Given information about scheme of stress state in deformation zone when drawing and configuration of die hole. Also given information about tensile test and analysis of its results.

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