CNC machining and CNC system

Beijing Fanaco Electromechanical Co., Ltd. (100085) CNC is the basic technology of advanced manufacturing technology. CNC machining has shown great advantages in modern production. For modern manufacturing, CNC machine tools are very suitable for complex, precise and small-sized parts. Or ordinary ordinary machine tools can't meet this requirement at all. Even profiling machine tools and modular machine tools cannot solve the contradiction between high precision and small batches. Therefore, CNC machining is very suitable for parts processing technology in aviation, aerospace, power, transportation and electronics manufacturing.

One of the main problems faced by parts processing is the contradiction between product accuracy, variety and small batches. This requires flexibility from the machine tool to the CNC. Due to software control, the CNC system has great flexibility.

The outstanding advantages of modern CNC machine tools are high-precision processing and diversified processing, which can completely replace other processing methods. Since the CNC machine tool automatically processes according to a predetermined program, the processing process does not require manual intervention, and the processing accuracy can be corrected and compensated through software, thereby improving the processing accuracy and quality of the parts. The product can be stable. This is especially true for multi-variety and small-batch parts.

In addition, the use of CNC machine tools can increase productivity. Generally, the production efficiency can be increased by 2 to 3 times. For the processing accuracy of some complex parts, the productivity can be increased by 10 times or even higher. Some CNC machine tools have multiple processes and automatic tool changers, so they can be used on one machine tool, which not only improves production efficiency, but also saves factory area.

The 0 series CNC system is a high-precision, fully functional CNC system. It has good flexibility and is an ideal choice for machining of mechanical parts.

What are the main indicators to measure the pros and cons of the CNC system? Reliability The most important of these indicators is reliability. The reliability index usually uses the mean time between failures (MTBF unit is hour). Some companies use failure rate (the unit of failure rate is time/month). The failure-free time of CNC machine tools is usually 500h, which requires the failure-free time of the CNC system to be longer than this time. At present, the failure-free time of the domestic CNC system can reach 500010000h, which is even more ambiguous, while it is more than 10000h abroad. The failure rate of FANUC FS-01 system is 0.008 mechanical workers (time/month. It is equivalent to 90 degrees no failure time, depending on whether the command value range of the CNC system meets the needs of the machine. These command value ranges include: minimum input increment , Minimum command increment, maximum programming size, maximum rapid traverse speed, feed speed range, etc. The resolution and rapid traverse speed of CNC machine tools and the range of processing speed range are the basic basic indicators: these indicators and the level of the CNC system Relevant; the resolution indicates the interpolation capability of the system; when considering the entire command range, it is also related to it. The indicator to the servo device.

This function is mainly to meet the requirements of machine tools. The general CNC system has two functions, basic function and selection function. The former is a function of the numerical control system, while the latter is a function provided when the user chooses. Each additional option will increase a certain price. Therefore, in order to improve the economics of CNC machine tools, the functions of the CNC system must be carefully selected according to the needs. The function of CNC system is related to the type of CNC system. For example, the functions of CNC lathes and CNC milling machines are different. Therefore, different system functions should be selected for different types of machine tools. When selecting a function, it must be determined according to the purpose of the CNC machine tool. System functions of different levels are also different. On the one hand, the more functions, the more wrong this idea. In China's processing workshops, the general purpose of CNC machine tools is more specialized. Therefore, it is not necessary to choose a system with many functions, which will increase the purchase price.