Model: UT1058 Automobile Brake Lining Chase Friction and wear testing machine

SAE J661 Automobile Brake Lining Chase Friction and wear testing machine 

Brake lining friction and wear testing machine, also known as CHASE friction testing machine. It is a kind of testing machine used for small sample test, which is designed with reference to the American standard SAE J661 test Standard specification and conforms to the latest national standards GB 5763-2018 and GB/T 17469-2012. The machine is used to test the friction properties of friction materials in the braking system, and is suitable for M1, M2, N1, 01, 02 types of vehicles using small sample bench tests, widely used in product formula research, product quality control in the production process and export product quality certification. 

Principle: The test specimen is pressed against the inner surface of the friction drum rotating at a certain speed at a constant pressure, so that a frictional force is generated along the tangential direction of the contact surface, and the coefficient of friction of the measured sample can be determined by measuring the pressure and friction. During the test, the CHASE tribometer controls the temperature change at any time as required, and uses the auxiliary heating tube heating of the outer ring of the drum and the suction air cooling of the back, so that the temperature change at the sample is stable and the temperature measurement accuracy is higher. 

Main structure: 

1.1 Main frame: The testing machine is composed of a spindle drive system, a heating system, a cooling system, air cooling temperature control, a temperature measurement system, a friction torque measurement system, an industrial control computer (including digital display control of various main parameters, alarms, etc.), an electrical control system, a high-voltage system, and other components. They are all installed on the frame with the welding machine base as the main body. From the appearance photo of the testing machine (Figure 1), it can be seen that the front of the machine base is the door of the testing machine, and there are maintenance windows and air inlet windows around it.

1.2 The spindle motor adopts a three-phase asynchronous motor and a variable frequency speed regulation system. The rated power of the motor in this system is 15kW, with a variable frequency speed range of 0-1000r/min and stepless speed regulation. This spindle transmission system can work normally within the range of 0-1000r/min. Due to the application of a variable frequency speed regulation system, it has high transmission torque at low speeds, completely changing the disadvantage of the thyristor continuously variable transmission system that the transmission torque decreases exponentially at low speeds. The spindle speed accuracy of this testing machine can reach ± 1%. This machine is controlled by a frequency converter. When a large friction torque suddenly occurs during the high load test, the spindle torque increases rapidly, and the frequency converter provides overcurrent protection. The spindle immediately stops automatically; This machine is equipped with a timing device (minute and second preset), and an automatic parking system for exceeding the preset time.

Due to the difficulty in installing and debugging the spindle system of the testing machine, users should not easily disassemble and clean it.

1.3 Temperature control system

The temperature measurement module uses customized temperature sensors and PID temperature control meters. The heating module uses a 6kW heating tube to heat the brake drum, and the cooling module uses a 1.1kW fan for air cooling. There are air vents at the bottom and sides of the box for cold air circulation.

Brake Lining Quality Test Procedure(STABILIZED Nov 2012) J661_201211

The purpose of this SAE Recommended Practice is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings. The performance data obtained can be used for in-plant quality control by brake lining manufacturers and for the quality assessment of incoming shipments by the purchasers of brake linings.