The brake pad friction/wear tester is a kind of test machine to evaluate the friction and wear of brake pads and brake pad materials.
It is also widely used to test the quality of brake pads and develop new compositions of brake pads.
Developing brake pad materials to be used for automotive and train brake applications, is aimed to formulate the materials that address cost reduction, expected (usually more demanding) performance, and compliance with new safety and environmental regulations.
Determination of the tribological behavior of brake pads and other friction materials under real environmental conditions is a critical task that can significantly impact the automotive and railway industry.
In braking test applications and testing of friction materials for brake applications, full-scale or reduced-scale dynamometers are generally used.
But such tests include a cost- and time-intensive method because they require the rotor and brake pads to be in their final form.
UTS Scientific Inc. has developed a cost-effective and fast screening method and ranks materials before performing the component level evaluation. With this system, it is easy to characterize the tribological performance of friction material on small-scale samples in a precise and timely manner.
Some key parameters such as sliding speed, friction, wear, and temperature is mentored during testing.
The test system can be utilized for testing brake pad materials specifically but all friction materials generally.
The system can be programmed with industry-standard dynamometer protocols and other specific standards.
The test parameters as friction force, coefficient of friction, sliding speed, sliding and running distance, temperature and wear depth can be adjusted, detected, and monitored during and after each test.
This system may provide a very good correlation with the tests performed on the full-scale dynamometer following the same standards.
Along with controlling sliding speed, the temperature of the pad, the temperature of the rotor, torque, and coefficient of friction, controlling environmental parameters, like temperature and relative humidity are also possible to control and screen.
Also the test system may allow optionally to collect the debris released from the sliding contact interfaces during the test.
Such debris can then be used for physical and chemical characterizations to be able to lighten the friction and wear mechanisms operated.
Brake pad samples are pressed against the steel disc, applying loads that simulate contact pressures employed in the ECE R 90 (Annex 9) and NF F 11-292 protocol.
Again, since a benchtop scale system has very low inertia in comparison with the dynamometer, the deceleration is precisely controlled at the motor, using similar stopping-time values to those collected from the reduced-scale test.
UTS brake pad and friction materials tester utilizes user-friendly, programmable, script-based software to enable users to simulate a wide range of different modes:
Constant speed intermittent test mode.
Constant speed wear rate test mode.
Constant pressure intermittent test mode.
Effect of humidity on brake material behavior.
Fade and recovery protocols.
Specifications:
Protocols
ECE-R90 Test Schedule (Annex 9)
NF F 11-292 Test Procedure for Railway App
Other special protocols adaptation (CNS 2586 and TS 555)
Loading
Pneumatic
Friction Force
0 - 2000 N (Optionally up to 3500 N)
Axial Load (N)
400 - 2000 N (Optional 3500 N)
Disc Speed
500 - 1800 rev/min (Optional max : 2500 rpm)
Sliding Speed
6.5 m/s- 23.5 m/s (Optional 30 m/s)
Power
22 kW (AC 380V three-phase)
Heating Capacity
4.5 kW (Optional)
Air Cooling Capacity
2.5 kW (cooling air volume 600 m³/h)
Temperature Range
0 - 600 ℃
Wear Depth Measurement
0 - 2 mm range with 2 µm sensitivity (Optional)
Test Samples
Samples in different sizes and geometries.
Possibility to test with 3 samples at the same time and to determine the average friction coefficient.
Real-time temperature measurement on the sample and counter-face (disc surface).
Software
Control via PC / HMI Panel.
Speed (rpm), pressure, and test Cycles/Brake applications can be adjustable.
Real-time friction coefficient, friction force, sliding distance, applied normal force tracking, brake, and disc temperatures as a function of time.
Testing, printing curve, real-time data storage, and reporting.
Easy export of data into Excel format.
Basic and standard test options
UTS Brake pad/friction materials Tester utilizes user-friendly, programmable, script-based software to enable users to simulate a wide range of different modes:
Constant speed intermittent test mode.
Constant speed wear rate test mode.
Constant pressure intermittent test mode.
Effect of humidity on brake material behavior.
Fade and recovery protocols.
NOTE :
The parameters and options given here are provided as standard options. Possible extended parameters or new possible options can be provided if needed.
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