CNC precision processing plant is developing towards high speed and high efficiency. This includes speed control of NC machining. In order to make full use of the effective working stroke, it is necessary to accelerate the moving parts to the high speed stroke in a short time, and stop in the high speed stroke. This is why it is necessary to control the speed of CNC machining.
1. Flexible acceleration and deceleration control
In the CNC machining of Dongguan, the specific automatic speed regulation function is generally directly realized by the system program. In this way, it is necessary to change the acceleration and deceleration characteristics of the system or modify the NC program through addition and subtraction control, so ordinary users cannot make the NC machine tool have the best acceleration and deceleration performance according to their own needs. Desire. Therefore, the flexible acceleration and deceleration control method proposed by us adopts the database principle, divides the acceleration and deceleration control into two parts: acceleration and deceleration description and implementation, and separates the acceleration and deceleration description from the system program. In the NC system software, a general control channel independent of the acceleration and deceleration database content is designed to independently complete the acceleration and deceleration calculation and trajectory control.
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 templates in the form of digital tables.
3. Flexible automatic deceleration control
The acceleration control is also stored in the acceleration and deceleration curve library in the form of a digital table as a template. Reasonable automatic acceleration and deceleration control is an important link to ensure the dynamic performance of CNC machine tools. The automatic acceleration and deceleration control based on fixed curve in the traditional Dongguan CNC precision processing plant lacks flexibility. The acceleration and deceleration process is difficult to ensure the coordination with the machine tool performance, and it is difficult to optimize the dynamic characteristics of the machine tool movement.