Huazhong University of Science and Technology CNC machine tool decryption: breaking the Western blockade, one of the precision of one thousandth of hair
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On the evening of March 4th, the seventh episode of the Great Power (second season) "Intelligent Pioneer" was premiered on the CCTV-2 financial channel. Huazhong CNC Co., Ltd., a subsidiary of Huazhong University of Science and Technology, represented the machine tool industry in the show.
High speed, high precision and intelligence have become the focus of competition in the global equipment manufacturing industry, and the demand for ultra-precision machining control systems is rising rapidly. However, more than 80% of China's high-end CNC equipment is still dependent on imports, and the value of high-end CNC equipment to be imported every year is as high as 3 billion yuan.
Central China has an emerging cluster of intelligent control industries and is one of the most important R&D bases for CNC systems in China. Here, Huazhong CNC is developing China's first CNC system with ultra-precision machining control capabilities. Chen Jihong, a professor at the School of Mechanical Engineering at Huazhong University of Science and Technology and chairman of Huazhong CNC, said: "Our goal is to break China's passive situation in this field."
"The domestic CNC system has experienced a difficult stage of development, and it has been defeated and defeated repeatedly. We have not accepted this restriction on foreign countries' restrictions on China."
Ultra-precision mirror machining is the highest level of metal cutting. The scratches caused by the contact of the tool with the contact surface are called roughness. At the ultra-high speed of the machine spindle speed of 24,000 rpm, the roughness of the parts is controlled below 0.02 microns, which is one ten-thousandth of the diameter of the hair, and is one of the standards that must be achieved in ultra-precision machining systems. .
The speed of the tool rises rapidly from 0 to 100 meters per second. At the moment the cutter enters, the running acceleration reaches the acceleration of gravity. This is equivalent to speeding the car from zero to 200 kilometers in 5.6 seconds.
The surface of the metal workpiece is processed into a mirror surface, which can only be achieved by an ultra-precision CNC system. How to monitor and adjust the micron-level machining accuracy in real time during the machining process is the core technical secret of the Western CNC manufacturing giant. Huazhong CNC engineers have created a unique method, using the chromatogram to observe, using the sensor to collect the cutter head data and transmit it to the computer. Each small fluctuation of the cutter head is marked with different colors to capture the naked eye. Difficult to capture errors. Using data to find machining errors and optimize them, this is actually a set of intelligent data acquisition and analysis systems.
With the help of the chromatogram, the surface machining accuracy of the parts reached 0.01 micron. This is equivalent to a car running at a speed of 100 kilometers per hour, the tire running deviation is only 3 hair, and the tire's jitter error is less than one ten thousandth of the hair.
"This mirror with a length and width of only 5 cm seems to be very small. For this reason, we have accumulated a total of seven years of research and development. Its success also means that we have made major breakthroughs in the research and development of ultra-precision machining control systems. After catching up with the world-class, after three to five years of hard work, our control precision will surely reach the world's leading level."
The HNC-8 high-performance CNC system developed by Huazhong CNC has a resolution of 1 nanometer and has a maximum number of channels of 10 and a maximum number of axes of 127. The indicators have reached the international advanced level in an all-round way. The original "chromatogram" is used to improve the machining accuracy, and the machine tool "electrocardiogram" composed of the internal electronic control big data of the machine tool is used to realize the intelligent function of the machine tool. Processing efficiency is 20% higher than foreign systems. The use of domestic equipment, domestic systems, domestic industrial software to build intelligent manufacturing demonstration plants, has become a model of independent innovation.
The high-performance CNC system is the "best brain" of CNC machine tools. The core functions such as 5-axis linkage are the core technology that cannot be bought. It breaks through the dual monopoly of the West in technology and market, and helps China to make 2025. , equipped with Chinese wisdom.
In this episode, we also introduced the world's first intelligent data collector developed by Huazhong CNC and related companies. The intelligent data collector has been applied to Jinsheng 3C intelligent factory. This is the world's most extensive collector of data acquisition coverage. It can collect data on more than 100 different brands of CNC machine tools, robots and other equipment. This time fundamentally solved the problem of data collection in the process of smart factory renovation. This is the first time in the world to realize the interconnection of data collection between machine tools such as CNC machine tools and robots that cross national borders and cross brands. Huazhong CNC participated in the planning and implementation of the intelligent factory, and was mainly responsible for providing machine tool numerical control system, robot, production line control system and smart factory big data, and opened the bottom equipment layer to the highest decision-making layer, realizing the true sense. Intelligent production.
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