Design and manufacturing of the testing device for the friction coefficient of the materials used in disc-brake systems in automotive

In this study, in order to define friction coefficients of automotive brake lining under different temperatures, speeds and pressures, test equipment was designed and manufactured. When vehicles in motion are required to or stopped by friction and slipping, their kinetic energy is absorbed. As a result, the vehicles are slowed down or stopped. In order to do this, coefficients of friction of surface material couple needs to be high and stable. Identifying the friction coefficient of brake lining is very important for providing safety of passengers and vehicles.This test equipment was designed to investigate variables such as temperature, speed, pressure that are occured in automobiles. The equipment enables to change friction surface temperature from 0 to 400°C, speed from 0 to 14 rpm and pressure from 0 to 40 MPa. This study was carried out for ten different pads which, provided from automotive industry. Friction coefficient-temperature-time graphs are obtained to identify the effect of these variables. Values of variables measured are recorded every second in the database, and then their effects are investigated.