Numerical control machine tools are the most important equipment in modern machining workshops. Its development is the result of the combination of information technology and manufacturing technology. In the past 20 years, the rapid development of information technology has greatly stimulated and increased the upper level intelligent functions of manufacturing systems. In the next 20 years, intelligence will extend to the bottom layer of factories, with higher performance and more functions of CNC systems; Due to the flexibility of CNC systems, individual machine tools become more flexible and refined; Can be widely disseminated; Easy integration and reconfiguration; Measuring process, predicting results, diagnosing faults, and avoiding accidents; And process it in a scientific way to achieve * production efficiency. Here are some recent developments regarding the Longwo Mechanical Numerical Control System.

1. Further improvement of CNC machine tool CNC system with more functions

1.1 Multi coordinate and Multi system Control

For example, FANUC's CNC system 11S30i-MODEL A has a maximum control system of 10 systems (channels), with a maximum number of axes and a configuration of 40 axes. The feed axis has 32 axes, the spindle has 8 axes, and the maximum number of simultaneously controlled axes is 24 axes per system. The maximum PMC system consists of three systems. The maximum number of I/O points is 4096/4096, and the basic command speed of PMC is 25ns. The maximum pre read program segment is 1000 segments. This is the world's most configured CNC system. Multi axis and multi system configuration, especially suitable for the needs of large automated machine tools, composite machine tools, multi head machine tools, etc.

1.2 High precision and high-speed machining functions

This is the most important function of a numerical control system. With this feature, manufacturing technology has made significant progress. CNC machine tools are controlled by computers, which can ensure that the processed parts have high precision and repeatability. However, in order to obtain a certain function, the signal input to the numerical control system must undergo a series of processing, inevitably resulting in distortion and delay. Therefore, in high-speed machining, in order to maintain high machining accuracy, certain measures must be taken to reduce deformation and time delay. High precision and high-speed machining require not only mechanical design and manufacturing to ensure the achievement of goals, but also high machining speed and high control accuracy for CNC systems. Adopting feedforward control to compensate for errors caused by servo lag and improve machining accuracy. By controlling the feed rate and adopting appropriate acceleration and deceleration curves, errors caused by acceleration and deceleration lag can be reduced. Forward looking control calculates, processes, and buffers motion data before program execution, thereby controlling high-speed tool movement with minimal error. For high-precision contour control of machine tool smooth operation, real-time recognition in the form of instructions can effectively control speed, acceleration, and jerk, ensuring that the machining is always in a stable state. To prevent interference, digital filtering technology is used to eliminate mechanical resonance and improve the position gain of the servo system. High precision feed and spindle servo systems are crucial for high speed, precision, and accuracy. At present, its performance is mainly improved from the following aspects. Reduce the size of motors, drivers, and control units, and improve the resolution of encoders; The linear motion axis can be driven by a linear servo motor; Reduce mechanical transmission chains, improve rigidity and accuracy. When the spindle motor adopts a synchronous motor, it is very suitable for gear machine tools. gear