CNC machining in China is developing towards high speed and high efficiency. This includes the speed control of CNC machining in China. If we want to make full use of the effective working stroke, we must make the moving parts accelerate to the high-speed stroke in a very short time, and stop at the instant in the high-speed stroke. This is why it is necessary to control the speed of CNC machining in Dongguan.
According to the open control idea, we propose a method of automatic acceleration and deceleration control for the movement of CNC machine tools according to any curve. This method will push the automatic acceleration and deceleration control from the traditional fixed mode to the new flexible mode, and explore a new way to effectively improve the dynamic performance of CNC machine tools.
1. Flexible acceleration and deceleration control
In Dongguan CNC machining, the system program directly realizes the specific automatic speed control function. In this way, it is necessary to change the acceleration and deceleration characteristics of the system or modify the numerical control program by adding and subtracting control, so ordinary users can not make the numerical control machine tool have the best acceleration and deceleration performance according to their own wishes. Therefore, our flexible acceleration and deceleration control method adopts the principle of database, divides acceleration and deceleration control into two parts: acceleration and deceleration description and implementation, and separates acceleration and deceleration description from system program. In the software of CNC system, a general control channel is designed, which has nothing to do with the content of acceleration and deceleration database.
2. Flexible automatic acceleration control
Set the acceleration curve, analytical curve and non analytical curve, and store them in the acceleration and deceleration curve library as a template in the form of a number table.
3. Flexible automatic deceleration control
As a sample, acceleration control is stored in acceleration and deceleration curve Library in the form of data table. Reasonable automatic acceleration and deceleration control is an important link to ensure the dynamic performance of CNC machine tools. Because of the lack of flexibility, the traditional automatic acceleration and deceleration control based on fixed curve is not easy to ensure that the acceleration and deceleration process is compatible with the performance of the machine tool, and it is difficult to achieve the best dynamic characteristics of the machine tool movement.
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