RANCANG BANGUN MESIN POLISHING SEBAGAI ALAT BANTU PRAKTIKUM METALOGRAFI DI LABORATORIUM MEKANIK

Abstract

The polishing machine is one of the tools used for testing metal structures (metallographic). The process beginswith mounting, grinding, polishing, etching, and continued with observation on a microscope. The working principle ofthe tool is polishing the specimen using coarse, medium, smooth, and very fine sandpaper. The purpose of this polishingmachine manufacturing activity is to streamline the use of time in refining the specimens, as well as the presence of thistool also helps the learning process of metallographic job practicum in the mechanical laboratory of Politeknik NegeriUjung Pandang. The making of the polishing machine consists several stages, namely: the stage of design, manufacture,assembly, and testing. Based on the results of the testing and discussion, it can be concluded that the presence of thispolishing machine in the PNUP mechanical laboratory makes the learning process of job metallographic practicum moreefficient in terms of the processing time of test objects and also makes the workmanship of the specimen better in termsof the observation process on the microscope after the etching process.