Studi Eksperimental Kedalaman Aus dan Koefisien Gesek Akibat Stick-Slip pada Reciprocating Wear

Abstract

In any material that makes contact with other materials will give rise to frictional forces, the frictional forces themselves can be categorized into two: static and kinetic frictional forces. In the industrial world are often found spare parts that experience static and kinetic friction. The change in frictional force from static to kinetic is called stick-slip friction. In the occurrence of stick-slip friction, the impact of friction forces that occur has the greatest value, so the phenomenon stick-slip friction is quite influential on the life of a material. In a previous study conducted by Simatupang, R. 2016 analyzes coefficient of friction on stick-slip friction, using ST-37 steel pin material which is quite difficult to find in the market. Therefore, the purpose of this research is to study the relation of loading variation to material wear and coefficient of friction in the occurrence of stick-slip friction phenomenon using ST-41 steel pin material which is generally more easily found in the market in order to benefit more widely. In this study, the stages of the procedure starting with the determination of variable load and constant parameters that is with loading of 20 N, 30 N 40 N and with sliding track parameters as far as 1440 m, sliding speed 0.1 m / s, the material is swiped acrylic With a ST-41 half-ball steel pin. After that, equipment settings and calibration of test equipment include calibration of speed and loading. The test is performed on each loading with the condition of the camera recording friction process between plate with pin. iii iv The test result plate is measured using a dial indicator to obtain a wear profile profile. The test video tape is extracted using Kinovea software to obtain time and pressure change data at each point along the path so that the coefficient of friction at each point can be calculated. Then the stick-slip area wear with sliding compared and stick-slip effect on the change of loading is analyzed. The results obtained from this research is, the greater the loading the greater the wear caused by stick-slip friction. The coefficient of friction in the stick-slip area tends to decrease along with the increase of loading, and it is found that the comparison between friction coefficient in the stick-slip region with sliding decreases with increasing of loading.