Prospects for The Future Development of CNC Machining

Jul 28, 2020

CNC Machining has been promoted. CNC index-controlled machine tools are programmed and controlled by CNC machining languages, usually G codes. The CNC machining G code language tells the Cartesian position coordinates of the machining tool of the CNC machine tool, and controls the feed speed and spindle speed of the tool, as well as the tool changer, coolant and other functions. Compared with manual processing, CNC machining has great advantages. For example, the parts produced by CNC machining are very accurate and repeatable; CNC machining can produce parts with complex shapes that cannot be completed by manual machining. With the continuous development of science and technology, CNC Machining will certainly undergo great changes in the future.

1. Complex and diversified functions
All kinds of machining centers equipped with automatic tool changers can simultaneously realize milling, boring, drilling, turning, reaming, reaming, tapping and other processes on the same machine tool. It also uses multiple spindles, Polyhedral cutting, that is, cutting different parts of a part in different ways at the same time. Because the CNC system adopts the hierarchical interrupt control method, parts processing and programming can be performed on one machine tool at the same time. In order to meet the requirements of flexible manufacturing systems and computer integrated systems, the CNC system has a long-distance serial interface and can even be networked. Realize data communication between machining centers, and can also directly control multiple CNC milling machines.

2. Ultra-high and ultra-precision
Speed ​​and accuracy are two important indicators of data processing centers, which are directly related to processing efficiency and product quality. At present, the numerical control system uses a processor with a higher number of bits and a higher frequency to increase the basic operation speed of the system. At the same time, the use of ultra-large-scale integrated circuits and multi-microprocessor structures to improve the system's data processing capabilities, that is, to improve the speed and accuracy of interpolation operations. In addition, the linear servo feed method of the machine tool table is directly driven by a linear motor, and its high speed and dynamic response characteristics are quite superior. The CNC milling machine will also adopt a structure that combines a spindle motor and a machine tool spindle to realize the integration of a variable frequency motor and a machine tool spindle. The bearings of the spindle motor adopt magnetic bearings, hydrodynamic and hydrostatic bearings or ceramic rolling bearings.

Modern CNC milling machines will introduce adaptive control technology to automatically adjust working parameters according to changes in cutting conditions, so that the best working conditions can be maintained during processing, so as to obtain higher processing accuracy and smaller surface roughness, and at the same time Improve tool life and equipment production efficiency. In the whole working state, the system conducts self-diagnosis and inspection on various connected devices at any time. In the event of a failure, measures such as shutdown shall be taken immediately, and a failure alarm shall be made to indicate the location and cause of the failure. It can also automatically take the faulty module offline and switch on the spare module to ensure the requirements of an unmanned working environment. In order to achieve higher fault diagnosis requirements, its development trend is to adopt artificial intelligence expert diagnosis systems.