Brake pad friction performance testing is critical to ensure their quality and safety. The following are the detailed test methods:
1. Bench Test
Fixed speed friction tester test: this is one of the most common test methods. Brake pads are mounted on a test fixture so that the pads come into contact with a rotating brake disk, and the friction test is conducted under set conditions of speed, pressure and temperature. For example, the braking of a car at different driving speeds (e.g. 30km/h, 60km/h, 100km/h) is simulated, and data such as friction torque and coefficient of friction are recorded through sensors. During the whole testing process, the temperature and humidity of the test environment need to be strictly controlled, as these factors will have an impact on the friction performance.
Inertial bench test: This test is closer to the braking conditions of actual vehicles. It uses an inertial system to simulate the mass and driving inertia of the vehicle, accelerating the simulated wheels (fitted with brake discs and brake pads to be tested) to a certain speed by means of a drive motor, then applying the brakes to measure the braking distance, braking time, deceleration, and the coefficient of friction, among other key indicators.
2.Road test
Vehicle Installation Test: The brake pads to be tested are installed on the test vehicle and a suitable test road is selected. During the test, the vehicle's speed, braking distance, braking time and other data are recorded by professional test equipment.
In order to comprehensively evaluate the performance of brake pads, it is necessary to carry out a variety of working conditions, including normal braking, emergency braking, continuous braking and so on.
