10. The Current Trends of CNC
The current trends of CNC (Computer Numerical Control) include the following aspects:
High - speed and high - precision processing:
Spindle speed: The maximum spindle speed of machine tools using electric spindles can reach 200,000 r/min.
Feed rate: With a resolution of 0.01 μm, a maximum feed rate of 240 m/min can be achieved for precise processing of complex surfaces.
Computing speed: CPU development has led to 32 - bit and 64 - bit CNC systems, with frequencies increasing to several hundred megahertz or even gigahertz. This enables high feed rates even at high resolutions.
Tool change speed: The tool change time of advanced foreign machines is generally about 1s, and the fastest can reach 0.5s.
Functional compounding: Composite machine tools can complete various processing steps from blank to finished product. They can be divided into process - compound and process - compound types. The use of composite machine tools reduces workpiece loading and unloading time, improves processing accuracy, shortens the manufacturing cycle, and enhances production efficiency.
Intelligent control:
Process adaptive control technology: By monitoring information such as cutting force, spindle and feed motor power, current, and voltage, the tool force, wear, breakage state, and machine tool processing stability are identified. Then, processing parameters and instructions are adjusted in real - time to improve machining accuracy, reduce surface roughness, and enhance equipment operation safety.
Intelligent fault self - diagnosis and self - repair technology: Modern intelligent methods are used to quickly and accurately locate faults based on existing fault information.
Intelligent fault playback and fault simulation technology: It can record various information of the system, playback and simulate errors and accidents on CNC machine tools, determine the causes of errors, find solutions, and accumulate production experience.
Intelligent AC servo drive: It can automatically identify the load and adjust the parameters of the servo system, including intelligent spindle AC drive and intelligent feed servo device.
In addition, the development of CNC also shows trends such as miniaturization and reduced cost. At the same time, with the continuous development of automation technology, CNC machines will be more closely integrated with automated production lines, and will also be more networked and information - based, enabling remote monitoring and operation.
