With the continuous development of advanced manufacturing technology in the world, the application of ultra-high-speed cutting, ultra-precision machining and other technologies, the rapid development of flexible manufacturing systems and computer integrated systems continue to mature, what are the higher requirements for CNC machining technology?
Equipped with automatic tool changer (tool magazine capacity up to 100 or more), various machining centers can realize milling, boring, drilling, turning, reaming, reaming, tapping and other processes on the same machine at the same time, modern CNC machines also use multi-spindle, multi-face cutting.
The CNC system achieves data communication between CNC machines and can also directly control multiple CNC machines.
2. Higher speed, higher accuracy
Speed and accuracy are two important indicators of CNC machines, which are directly related to machining efficiency and product quality.
Currently, the CNC system uses a bit-digit, higher-frequency processor to improve the basic computing speed of the system.
At the same time, ultra-large-scale integrated circuits and multiprocessor structures are used to improve the data processing capability of the system, that is, to improve the speed and accuracy of interpolation operations.
The linear motor is used to directly drive the linear servo feed of the machine table, its high speed and dynamic response characteristics are quite superior.
The use of feed-forward control technology greatly reduces the tracking hysteresis error, thus improving the machining accuracy of corner-cutting.
Modern CNC machine tools will introduce adaptive control technology, according to the changes in cutting conditions, automatically adjust the working parameters, so that the processing process can maintain the best working condition, so as to obtain higher machining accuracy and smaller surface roughness, but also to improve the tool life and equipment production efficiency.
With self-diagnosis and self-healing functions, the system can self-diagnose and check the CNC system itself and the various equipment connected to it at any time during the whole working state.
In the event of a failure, immediately adopt measures such as stopping, and carry out a failure alarm to indicate the location and cause of the failure.
It is also possible to automatically disconnect the faulty module and turn on the spare module to ensure the requirements of an unmanned working environment.
In order to achieve higher requirements for troubleshooting, the trend is to use artificial intelligence expert diagnostic systems.
4. CNC programming automation
With the development of computer application technology, CAD / CAM interactive automatic programming has been widely used, which is the new trend of CNC technology.
It is the use of CAD drawing of the part machining pattern, and then the computer tool path data for calculation and post-processing, so as to automatically generate NC part machining program, in order to achieve the integration of CAD and CAM.
With the development of CIMS technology, CAD/CAPP/CAM integrated fully automated programming is now available.
The biggest difference between it and the CAD/CAM system is that the process parameters required for programming are obtained directly from the CAPP database within the system, without human involvement.
5. Most reliability
The reliability of the CNC machine has always been the main concern of the user.
CNC systems will use more integrated circuit chips, utilizing large scale or ultra large scale dedicated and hybrid integrated circuits to reduce the number of components to improve reliability.
Through the hardware function software to adapt to the requirements of various control functions, while using the modularity, standardization and generalization of the hardware structure of the machine body and series, making it easier to improve the hardware production batch, but also to organize production and quality control.
It also enables troubleshooting and alarming of hardware, software and various external devices in the system through automatic start-up diagnostics, online diagnostics, offline diagnostics and other diagnostic procedures.
Using alarm alerts, timely troubleshooting; using fault-tolerant technology, “redundant” design for important parts to achieve self-healing; using a variety of testing and monitoring technology, in case of production over travel, knife damage, interference, power failure and other accidents, corresponding protection shall be carried out automatically.
6. Minimization of the control system
The miniaturization of the digital control system makes it easy to combine mechanical and electrical equipment into one.
At present, it mainly uses ultra-large-scale integrated components and multi-layer printed circuit boards, with the use of three-dimensional installation methods, so that electronic components can be installed in a high-density, large-scale reduction of the system occupies space.
The use of the new color LCD thin display instead of the traditional cathode ray tube, will make the CNC operating system further miniaturized.
This allows it to be easily mounted on the machine tool equipment, making it easier to use for the operation of CNC machines.