Projeto e construção de um equipamento de ensaio de desgaste abrasivo: modelo roda de borracha

Abstract

The tribology is necessary to study the wear of materials and their behavior in front of this, some means are used to analyze and find solutions to these problems, one of these means is the abrasômetro an abrasive wear testing machine which we will be cover in this work. In this final work we can find the construction description of a abrasômetro type wheel-of-rubber according to standard ASTM G-65, whic one have the design and sizes of all parts modeled in SolidWorks software, machined and assembled in the workshop of this institution . This machine is necessary to provide infrastructure in tribology laboratory as well as a support to the experiments involving the study of materials wear. The machine operation works with a tangential force applied in the specimen and the rotation necessary for the rubber wheel spins, the abrasive that fell with the force weight, wearing the metal. The challenge of this work was to make a structure of a tribometer rubber wheel based on the standard; adding improvements to the equipment design, adapting it to the group's needs and facilitating the handling of it. In this work was made the design and manufacture of tribometer rubber wheel, the equipment validation step will be presented in another paper. For this validation are needed a boatload of experiments in order to prove the repeatability ability of the results. The results were satisfactory, the standard ASTM G-65 has been met and all the pieces are in the specifications, the machine was built as modeling in CAD and embedded in final assembly without problems.