Industry Information

Comparison Of Chinese And American CNC Systems

At present, the distribution pattern of CNC systems in the domestic machine tool market is basically based on high-end systems based on foreign systems, such as FANUC, Siemens, Mitsubishi, etc.; the mid-range and low-end systems are based on domestic systems, such as Guangzhou CNC and Beijing Kaidi , Wuhan Huazhong. The long-term technical advantages of foreign CNC systems have made high-speed machining centers, drilling and milling centers, compound machine tools and other high-end equipments rarely use domestic CNC systems. Under this circumstance, it is a long way to go to make the domestic high-end CNC Machining china system gain a place in the market.

Take the domestic gear shaping machine and hobbing machine tool industry as an example. At present, most of these machine tools use the Siemens system. However, from a technical point of view, this type of machine tool does not have to use the Siemens system. For example, the gear shaping machine tool is mainly a three-axis linkage, where one axis is set as a linear axis and the two axes are set as rotary axes. The up and down gear shaping action comes from the main shaft, which is realized by the main shaft motor driving the mechanical transmission device. In summary, the requirements of the gear shaping machine tool on the CNC system are mainly as follows:

  • ①Three-axis linkage;
  • ② Simultaneous interpolation of one linear axis and two rotary axes;
  • ③ Macro variable programming.

The domestic high-end CNC system can basically meet the above requirements, and the price is more advantageous. For hobbing machine tools, a four-axis CNC system is generally used. Its technical characteristics are that the hobbing axis and the workpiece axis rotate simultaneously at a certain ratio for flat gear processing, or relative to the Z axis movement, the workpiece axis is processed according to the helix angle of the gear Compensate for helical gear machining. The hobbing function appears in Siemens, Mitsubishi and other foreign systems as an independent function of the numerical control system, or it is an additional function and an optional function. Therefore, domestic CNC system manufacturers can develop or add this function to their own systems, thus entering the application field of hobbing machine tools.

In addition, various types of tool grinding machines are also promising fields for domestic high-end CNC systems. At present, FANUC, Siemens, Mitsubishi and other foreign CNC systems have models or functions dedicated to grinding machines. However, compared with the traditional positions of CNC systems such as machining centers and CNC lathes, grinding machines are still a relatively new field, such as crankshaft grinding machines, cam grinding machines, and gear grinding machines. Among them, the crankshaft grinder has high requirements on servo performance, and try to use a large inertia servo motor to ensure the consistency and stability of the grinding action, improve the grinding accuracy and reduce the surface roughness. Not difficult to achieve. For gear grinding machine tools, due to the high configuration of CNC system and mechanical functional components, the price of the whole machine is relatively high whether it is imported or domestically produced. In fact, the precision requirements of products processed by grinding machines in China cnc machining  are also different. Practice has proved that the servo motor equipped with a 17-bit resolution (131072 pulse/revolution) encoder can meet the accuracy requirements of most parts for the indexing of the rotating shaft, and the domestic high-end CNC system can do it. At the same time, there is a huge market potential for the transformation of domestic grinding machines. Many traditional grinding machines, including profile grinding machines and gear grinding machines, are faced with the choice of CNC transformation because of their low efficiency.

Moreover, according to the summary of practice in recent years, after the numerical control transformation of traditional grinding machines, the processing quality and processing efficiency have been greatly improved, and it is not too much to call it a green industry. Therefore, it is a brand-new attempt and choice for domestic CNC system manufacturers to attach importance to the transformation industry of traditional grinding machines, and then gradually enter the field of grinding machine manufacturing, and take the route of rural areas surrounding cities.

In summary, in order to achieve a breakthrough in market share in the competition of domestic high-end CNC systems with foreign CNC systems, in addition to being independent, they must also develop new ways, that is, to make no concessions in the positive market, but also in The side market can make a difference, so as to gradually enhance the product image of the domestic high-end CNC system and increase the market share.

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