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Development trend of CNC machining technology

High speed

With the rapid development of the automobile, national defense, aviation, aerospace, and other industries and the application of aluminum alloy and other new materials, the high speed of CNC machine tool processing requirements are becoming higher and higher.

  1. Spindle speed: The machine tool adopts an electric spindle (built-in spindle motor), and the maximum spindle speed is 200000r/min;
  2. Feed rate: When the resolution is 0.01µm, the maximum feed rate reaches 240m/min and complex machining can be obtained.
  3. Computing speed: The rapid development of microprocessors provides a guarantee for the development of CNC systems in the direction of high speed and high precision. The development of CPU has been developed into a 32-bit and 64-bit CNC system, and the frequency has been increased to hundreds of megahertz, thousands of megahertz. Due to the great improvement of the computing speed, the feed speed can be as high as 24 ~ 240m/min when the resolution is 0.1µm and 0.01µm.
  4. Tool change speed: At present, the tool exchange time of foreign advanced machining centers is generally around 1s, and the high has reached 0.5s. German Chiron company designed the tool library in a basket style, with the spindle as the axis, the tool is arranged in a circle, and the tool change time from knife to knife is only 0.9s.

High precision

CNC machine tool accuracy requirements are now not limited to static geometric accuracy, machine tool motion accuracy, thermal deformation, and vibration monitoring and compensation more and more attention.

  1. Improve the control accuracy of the CNC system: high-speed interpolation technology is adopted to realize continuous feed with tiny program segments so that the CNC control unit is refined. A high-resolution position detection device is adopted to improve position detection accuracy.
  2. Adopt error compensation technology: Adopt reverse clearance compensation, screw pitch error compensation, tool error compensation, and other technologies to make comprehensive compensation for thermal deformation error and space error of equipment.
  3. Use grid decoder to check and improve the machining center’s trajectory accuracy: predict the machining accuracy of the machine tool through simulation, so as to ensure the positioning accuracy and repeated positioning accuracy of the machine tool, make its performance stable for a long time, can complete a variety of machining tasks under different operating conditions, and ensure the machining quality of parts.

Functional Compound

The meaning of composite machine tools is to realize or as far as possible complete a variety of elements from blank to finished product processing on a machine tool. According to its structural characteristics, it can be divided into two types: process compound and process compound. The machining centers can complete the turning, milling, drilling, gear hobbing, grinding, laser heat treatment, and other processes that can complete all the processing of complex parts. With the continuous improvement of modern machining requirements, a large number of multi-axis CNC machine tools are more and more welcomed by major enterprises.

Intelligent Control

With the development of artificial intelligence technology, in order to meet the development needs of manufacturing production flexibility and manufacturing automation, the degree of intelligence of CNC machine tools is constantly improving. It is embodied in the following aspects:

  1. Process adaptive control technology;
  2. Intelligent optimization and selection of machining parameters;
  3. Intelligent fault self-diagnosis and self-repair technology;
  4. Intelligent fault replay and fault simulation technology;
  5. Intelligent AC servo drive device;
  6. Intelligent 4M numerical control system: In the manufacturing process, measurement, modeling, processing, and machine operation (namely 4M) are integrated into one system.

Open The System

1. Open to future technologies: As hardware and software interfaces follow accepted standard protocols, they can adopt, absorb and be compatible with the new generation of common software and hardware.

     2. Open to users’ special requirements: update products, expand functions, and provide various combinations of hardware and software products to meet special application requirements;

     3. Establishment of numerical control standards: standardized programming language, is not only convenient for users to use but also reduces labor consumption directly related to operational efficiency.

Drive Parallel

It can realize multiple functions of multi-coordinate linkage CNC machining, assembly, and measurement, and can also meet the processing of complex special parts. The parallel machine tool is regarded as “the most meaningful progress in the machine tool industry since the invention of numerical control technology” and “the new generation of CNC machining equipment in the 21st century”.

Extreme (large and miniaturized)

The development of national defense, aviation, and aerospace and the upsizing of basic industrial equipment such as energy requires the support of large and good-performance CNC machine tools. The ultra-precision machining technology and micro and nanotechnology are the strategic technology in the 21st century. It is necessary to develop new manufacturing technology and equipment which can adapt to the micro size and the precision of micro and nano machining.

Information Interaction And Networking

Not only can realize network resource sharing, but also can realize the remote monitoring, control, remote diagnosis, and maintenance of CNC machine tools.

Green Processing

In recent years, machine tools that can realize energy saving and environmental protection by dry cutting and semi-dry cutting without or with less coolant are constantly appearing. The general trend of green manufacturing accelerates the development of all kinds of energy-saving and environmental protection machine tools.

Application of multimedia technology

Multimedia technology integrates computer, audio-visual, and communication technology, enabling the computer to comprehensively process sound, text, image, and video information. The information processing can be integrated and intelligent, which can be used in real-time monitoring systems and production site equipment fault diagnosis, production process parameter monitoring, etc., so it has great application value.

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