An AC motor makes the brake disk rotate at a constant speed of 660 rpm;
At programmed time intervals brake applications are actuated.
They may be controlled in pressure or in torque modalities.
It is a reference machine typically used for quality control or
for the development of materials in the After Market sector:
- A (sample) test is carried out on a given
sample brake and the results are filed;
- The brake component (lining, disk, caliper), the quality of which is required to
be tested or which is in the development phase, is then fitted and the sample
- The differences between the sample and the tested
material are evaluated by analyzing the results.
The machine is managed by a PC, which monitors the tests execution.
The operator defines the following parameters by interacting
with a test description environment:
During the test, the following Time Histories are recorded:
- The braking times and the pause between consecutive brakings;
- The maximum and minimum temperatures for the testing and cooling phases of the brake;
- The control modalities of each single brake application:
- In pressure;
- In torque;
- In force (applicable if the machine is equipped with the Hand Brake option).
- Six temperatures (two of which inside the rotating part of the brake);
- Residual torque;
- Force and stroke of the hand brake (optional).
140 kW motor.
Maximum force applicable to the hand brake: 2 kN.
Maximum stroke of the hand brake: 50 mm.
The machine can be equipped with:
- Hand brake;
- Automatic sprinkling of the brake (also with "salt" water);
- Additional AC motor with vectorial control for tests at
a low number of revolutions (from 0 to 10 rpm).
This option allows the following types of tests to be carried out:
- Evaluation of the friction at 3 rpm;
- Sticking: evaluation of the detachment torque after the brake has
been operated for 24 consecutive hours without any release;
- Evaluation of the static friction (with the brake activation controlled
under pressure or force exerted on the hand brake);
- Hill hold: evaluation of the static holding of the brake during the cooling phase;
- Creep Groan: research on the noise when starting to move.