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Advisor(s)
Abstract(s)
Atualmente, a exigência e rigor exigidos pela indústria, incitam a competitividade entre diferentes fabricantes e prestadores de serviços a conseguirem providenciar os melhores produtos aos melhores preços possíveis, indo de encontro às expectativas do mercado. Neste contexto, a presente dissertação teve como objetivo analisar quais os parâmetros mais indicados para maquinar um bloco de aço W 1.2711 para ferramentas de corte com revestimentos de TiAlN e TiAlSiN. Em todos os ensaios, houve aquisição em tempo real das forças e momento de maquinagem com auxílio de um dinamómetro rotativo. Nas forças obtidas, observou-se um aumento a partir de metade do comprimento de corte. Foi efetuada a medição da rugosidade da superfície da peça de trabalho. As ferramentas de topo, mostraram valores semelhantes nas direções transversal e longitudinal. Nas ferramentas esféricas, a rugosidade na direção longitudinal, foi muito superior à da direção transversal. As formas de desgaste mais predominantes em ambos os revestimentos, foram o desgaste de flanco, abrasivo e adesivo.
Currently, the demand and rigor required by the industry, incite the competitiveness between different manufacturers and service providers to be able to provide the best products at the best possible prices, while meeting market expectations. In this context, this dissertation aimed to analyze which parameters are most suitable for machining a W 1.2711 steel block with tools coated with TiAlN and TiAlSiN. In all tests, the machining forces and torque were acquired in real time with the aid of a rotary dynamometer. It was observed an increase in the obtained forces, starting the time half the cut length was achieved. After each test, the roughness measurement of the workpiece surface was carried out and, it was noticeable that the end-mills, showed very similar values in the transversal and longitudinal directions. In the ball nose tools, the measured roughness in the longitudinal direction was superior to the measured in the transversal direction. The most prevalent forms of wear in both coatings were abrasive and adhesive wear.
Currently, the demand and rigor required by the industry, incite the competitiveness between different manufacturers and service providers to be able to provide the best products at the best possible prices, while meeting market expectations. In this context, this dissertation aimed to analyze which parameters are most suitable for machining a W 1.2711 steel block with tools coated with TiAlN and TiAlSiN. In all tests, the machining forces and torque were acquired in real time with the aid of a rotary dynamometer. It was observed an increase in the obtained forces, starting the time half the cut length was achieved. After each test, the roughness measurement of the workpiece surface was carried out and, it was noticeable that the end-mills, showed very similar values in the transversal and longitudinal directions. In the ball nose tools, the measured roughness in the longitudinal direction was superior to the measured in the transversal direction. The most prevalent forms of wear in both coatings were abrasive and adhesive wear.
Description
Keywords
Maquinagem Desgaste de ferramentas Revestimentos CVD Aquisição de forças em maquinagem Aço para moldes Machining Tool wear CVD coatings Acquisition of the machining forces Steel for molds