In the precision machine tool equipment, the noise of the machine tool has become one of the important indexes for evaluating the performance of the machine tool. Generally, the noise of the headstock (main drive) is the largest among the whole machine noise of the machine tool. Because the high torque arc tooth synchronous belt transmission has the outstanding advantages of accurate transmission ratio, high efficiency, high power, stable transmission and convenient maintenance, most of the main transmission of modern CNC machine tools adopt high torque arc synchronous belt transmission. Therefore, how to control the noise of synchronous belt drive at high speed has become an important problem to control the noise of headstock and even the whole machine.
The main reasons for excessive noise of synchronous belt pulley during operation are as follows:
1. Overload;
2. The diameter of the synchronous wheel is less than the minimum standard, and the diameter arm bandwidth of the pulley is less than the minimum standard;
3. Excessive preload;
4. The installation between the pulley and the pulley is not parallel;
5. The engagement between the timing belt and the timing wheel does not match.
The main measures to correct the noise of synchronous pulley are as follows:
1. Improve the design to avoid operation overload;
2. Improve the design of the synchronous belt pulley diameter, appropriately increase the diameter, and ensure that the diameter of the synchronous wheel is greater than the bandwidth of the synchronous belt;
3. Adjust the preload;
4. Properly adjust the parallelism between pulleys;
5. Ensure that there is good engagement between the synchronous belt and the synchronous pulley.
