The grinding process is defined as an abrasive cutting action of a tool known as grinding wheel, which is submitted to high rotations, promoting excellent finishing and accuracy in dimensions, respecting the parameters established in each project. During the machining, the cutting edges of the abrasive grains undergo wearing and this increases the contact surface of the tool with the workpiece, increasing the machining temperature and creating possibilities of damaging it. Therefore, it is necessary to use a cutting fluid, responsible for lubricating and cooling the cutting zone, removing the chips from the cutting region between the workpiece and the wheel, and even having an anticorrosive action. However, its composition causes contamination to the environment and to the operator. In face of the increasingly strict environmental laws, it has become necessary to search for new methods of cooling that are at least as effective as conventional one and economically practicable. Thus, the Minimum Quantity of Lubrication was developed as a mist of air and oil applied at high pressure, reducing drastically the use of contaminants. In this work, two oil flows were used for the MQL technique, 30 ml/h and 120 ml/h. The wheel used was a CBN (Boron Cubic Nitride) one, composed of synthetic grains and the workpiece, in a ring format, were produced in AISI 4340 steel quenched and tempered. It was observed from results that MQL can be applied in the industrial processes without losing piece quality. keywords: cylindrical plunge grinding, minimum quantity of lubrication, cubic boron nitride grinding wheel, AISI 4340 steel.
Palavras chave: Tecnologia assistiva, Envelhecimento populacional, Equipamento médico hospitalar.A acessibilidade a serviços, produtos ou atividades é um direito de todo ser humano, assim como a sua segurança e preservação de sua qualidade de vida. Com o avanço da idade, determinadas atividades podem se tornar complexas e inseguras, como é o caso da necessidade de se tomar medicamentos diversas vezes ao dia. Desta forma, este trabalho objetivou apresentar uma solução pautada nos conceitos da tecnologia assistiva, para o auxílio da polimedicamentação diária. Os procedimentos metodológicos envolveram o levantamento bibliográfico, a aplicação de pesquisa para identificar o uso diário de medicamentos e a ocorrência de esquecimento do uso dos mesmos e o levantamento de similares. O resultado foi o projeto de um dispositivo eletrônico programável para aplicação no controle do armazenamento, dosagem e distribuição de comprimidos. A relevância deste trabalho se deve ao fato de que a correta dosagem medicamentosa é a diferença entre remédio e veneno.
Keywords
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.