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Cnc Machining China

What do you think is the core technology of machine tools? Is it precision? Is it reliability? …I think it is the accumulation of various basic technologies. The core of the CNC system is not the chip, but the algorithm, the code optimization. With this, the accuracy and stability of the CNC system can be achieved… As for the electromagnetic compatibility of the CNC system, it is a trivial matter in front of the algorithm. A Siemens motion control card can get us stuck.

The core of the mechanical system is more, the materials are not discussed, the structure part, we always think that machinery is a sunset discipline, but every time foreigners come up with a new structure, let’s just stay, it turns out this thing can still be like this! What reconfigurable concept, mechanism, static and dynamic structure optimization theory, spatial motion analysis decoupling magic horse, others have figured out the doorway, others’ computational mechanics has become commercial software, our computational mechanics , Except for Academician Zhong’s contribution to me, is it true that I am still lying on the thesis? I don’t know. If you can use ADAMS, you may not necessarily be proficient in dynamics. If you know ABAQUS ANSYS, I’m afraid I have a little knowledge of the numerical calculation of elastic mechanics. Many, although you can use it, you have to see which optimization is good. We are repeating past experience, and even some experience should have been defeated by the disease. People are digging for theories.

Basic components, hydraulic and pneumatic components, bearings… Sigh, functional components, angle milling heads are fine now, but double swing heads, universal milling heads. The electric spindle is a trouble again, the motor technology is still standing in the pit, this has to be worked harder, or the coil, the torque motor is about to cry. Anyone who knows all knows that buying imported machine tools, five-axis systems, and nano-precision CNC systems are the masters. The big price depends on the face of others, and it feels extremely uncomfortable to write a guarantee to others.

The development of machine tools to this day can be said to be almost standardized and specialized division of labor. The problem is that after this specialized division of labor, the core and key points are again distributed to foreigners. Export is progress, and it is worth beating gongs and drums and dancing square dances. But you can’t just dance and just rely on your brain to bridge the technical gap. Square dancing is too disturbing to the people and you can’t always dance. The exported machine tool doesn’t know which bearing, which coil, which encoder, and which functional components are. You don’t look at the news to see the gap, you don’t look at the appearance and the connotation, and you don’t want to dream of reality, so let’s study with your heart. It’s easier to break the technical blockade by doing basic research down-to-earth than writing a press release, but it’s hard to sit on the bench, and it’s even harder to spend money without making money. It’s really hard to plant seeds in the morning and harvest wheat at noon.

  • 1. What is the current level of CNC machining china?
  • 2. In the machinery industry, all kinds of CNC machine tools seen in the workshop are imported, and even the workers are proud of having brands such as “Siemens” and “Frank”.
  • 3. Is there no CNC system that can be accepted by the market in China so far? (I wonder if Huazhong CNC counts?)
  • 4. China YTO Group (which is regarded as China’s largest agricultural machinery company) in Luoyang, Henan Province, in some of their workshops are basically imported CNC machine tools, I remember they are very “proud” to introduce a German imported processing machine The center, told us to spend a million euros. I really don’t know where pride comes from?

The following are the views of different netizens:

The current level of China’s CNC technology

In terms of general CNC technology, I personally feel that there is a gap of at least 10 years.

More than 10 years ago or even earlier, FANUC achieved a full closed loop, but we have only gradually become popular in mid-to-high-end machine tools in the past few years.

Technologies such as five-axis machining and space tool compensation are mainly used in the aerospace field, but this technology has always been monopolized (blocked) by foreign manufacturers, and we can only research and develop independently. It has only begun to be applied in recent years, which is also related to the new opportunities for aerospace development in the late 1990s.

High-speed and high-precision technology: In recent years, it has gradually matured. Of course, this is also related to market demand and changes in the industrial structure-China has become the world’s factory, and the demand for engraving and milling machines has gradually increased.

Multi-channel control, turning and milling compound: It is also in recent years that this machine tool and demand have appeared on the market, and it has gradually been implemented.

Including some other high-end functions, which are basically done in universities or research first, but due to production, education and research capabilities and speed limitations, there are not many practical applications (this is related to scientific research capabilities, and there are few domestic originals); companies often do It’s all based on market demand to decide when to do it, and you have to settle for food and clothing first.

Is there any CNC system that can be accepted by the market in China so far?

Huazhong CNC can only be said to be a well-known company (university background, policy support, listed company);

Whether it can be accepted by the market, you will know by looking at the annual market sales. In China, it must be Guangshu, Kanedi, and the new generation and Baoyuan from Taiwan Province. Of course, due to some well-known reasons, the overall sales in Central China are still quite high, especially mid-to-high-end products.

Only the development of numerical control technology can not reduce or maintain the backward speed

Can you refer to whether you can master competitors’ technologies (such as engines, operating systems, etc.) through reverse engineering?

The conclusion is that this is a systematic project that requires balanced development in all aspects and takes time.

Deviate from the topic and say something else. Don’t talk about professional and technical issues, tell a story, and intuitively increase the subject’s understanding of this issue.

I don’t know if the subject of the subject has heard of the “Toshiba Incident”. I will tell you a story briefly, part of the content comes from the Internet.

The story of Japan’s “Toshiba Incident”

As early as 1957, the Soviet Union launched their first nuclear-powered submarine, the Lenin Komsomolsk. However, the Soviet submarine technology is relatively backward, especially in terms of noise indicators. One example is the “Alpha” class attack nuclear submarine built by the Soviet Union at that time. When it was operating in Norwegian waters, the underwater acoustic oscillations caused could even be detected by the U.S. Navy underwater acoustic monitoring station in Bermuda. (Big brother, can we fight for it?)

In the final analysis, the main noise source is the hydrodynamic noise generated by the propeller. To reduce this noise, a new type of high-precision propeller must be machined with a five-machine tool. Therefore, the Soviet Union has to get a high-precision five-axis linkage machine tool from Western countries at all costs. (Just to do something)

Finally, after conspiring for more than ten years (no exaggeration, it is really more than ten years), the Soviet conspiracy finally succeeded, (the background music is played here, accompanied by an inexplicable sense of tension), in short, it is the cunning Soviet people, see the money Open Japanese, balabala. . . I won’t go into details about the specific process. Baidu on its own is quite interesting. You can get a glimpse of the scene of the turbulent and turbulent Cold War period. Finally, in 1982, Toshiba took the “Batumi” ban and exported several nine-axis and five-axis machining centers to the Soviet Union.

With advanced numerical control processing equipment, the Soviet military industry shotguns were replaced, and the US Navy found that the noise of Soviet submarines was getting lower and lower, so that sometimes their warships almost collided with the opponent’s submarine sonar did not respond. The nuclear submarine collided in the Strait of Gibraltar. The cause of the accident was that the Soviet submarine was so quiet that the US Sonar didn’t find it.) In the end, by chance, balabala, the incident was finally revealed. It was easy to hide from the robbery, but the house thief was difficult to prevent. The backyard caught fire. Good for you to eat things from the inside and out of the house. If you want money, you don’t want to kill you. Now, the labor and management worked hard to carry, and Nima secretly gave him away.

“Batumi,” led by the United States, imposed extremely severe punishments and sanctions on Toshiba’s actions. Japanese Prime Minister Nakasone was forced to apologize to the United States, and Toshiba was held criminally responsible. Our CNC technology may be at least 30 years behind advanced countries

The story is over, please pay attention to the time. If you want to learn UG programming and receive learning materials in the group 565120797, Toshiba can secretly sell machine tools in 1982, which means that Japan has a high-precision five-axis linkage CNC system in the 1980s. To process complex free-form surfaces such as propellers. I happened to be involved with CNC machining when I was in school. At that time, the school’s project was also a seven-axis five-link CNC system to process propellers. I can’t provide more information about the specific content. I’m sorry, but it can be said that the instructor and team are at the top level in China. Whether we have reached the level of Toshiba in 1982, and whether the processed propellers can reach the noise level of the Soviet Union at that time, it is still unknown to me.

I went to university for a few years, and the technical gap with foreign high-end CNC systems and CNC machine tools (note that it is high-end and high-precision) is 30 years. Of course, you can’t simply calculate from such an example, but intuitively make the subject have an impression. The rapid development of domestic technology may not be as big as 30 years, because the current era has incomparable scientific research conditions and technical means, which can make up the gap faster.

In the end, you may have questions. Japan was so awesome in the 1980s, so what has the Japanese CNC been doing in the past 30 years? The answer is: higher accuracy, faster speed, and more reliable stability. And even if the accuracy speed is reached in a short time, the reliability is not guaranteed in a short while. I saw a lot of photos of the Japanese CNC system that I had before I was born on a certain occasion, and even if the system was broken decades ago, it still provides maintenance services. I was shocked to see it.

In recent years, China’s equipment manufacturing industry has developed rapidly, especially heavy-duty CNC machine tools. The annual output and market consumption of heavy-duty CNC gantry boring and milling machines, heavy-duty floor boring and milling machines, and heavy-duty vertical and horizontal lathes have all ranked first in the world. Each piece of “Made in China” that can be called a national treasure is well-known all over the world.

In the world of machine tools, China is not only big, but very big. The output value of machine tools is close to the sum of Germany and Japan, and has been ranked first in the world for many years.

After ten years of sharpening a sword, with the rapid development and maturity of technology, China’s heavy-duty machine tools can be described as fruitful, and many of the world’s largest CNC machine tools have been successfully developed, which can be called “national treasures.”

The world’s largest die forging hydraulic press

China Second Heavy Machinery Group successfully built the world’s largest die forging hydraulic press. This 80,000-ton die forging hydraulic press has a height of 27 meters above ground, 15 meters underground, a total height of 42 meters, and a total equipment weight of 22,000 tons. It is a domestically produced large aircraft. One of the important contributors to the successful flight test of C919.

The giant die forging hydraulic press is a national treasure-level strategic equipment that symbolizes the strength of heavy industry. It is an important symbol to measure a country’s industrial strength and military capabilities. There are only a handful of countries in the world that can develop it. At present, the only countries in the world with die forging presses above 40,000 tons are China, the United States, Russia and France.

China’s 80,000-ton hydraulic die forging press broke the 51-year world record held by the former Soviet Union in one fell swoop. This also marked the complete end of the era when China’s key large forgings were controlled by foreign countries.

The status quo and development trend of CNC machining technology

1. Numerical control is the core technology of modern machine tools

Traditional machine tools extend human physical strength and become working machines, while CNC technology gives machine tools a brain, making them more and more “smart”. Numerical control technology has evolved from passive execution of motion instructions to the ability to “perceive” the temperature, vibration, energy consumption and other operating conditions of the machine tool and adjust and control it. It can measure workpiece size, tool damage and predict tool life online, and prevent interference between tools and moving parts. , And even provide voice navigation or send short messages for the operator. The intelligent function of the CNC machine tool can ensure that the machine tool automatically adapts to changes in the processing environment, thereby making the machine tool operation more convenient, more stable in accuracy, and more efficient.

The five-axis linkage greatly expands the processing range of the machine tool, making it possible to process complex shapes and spatial curved parts, and provides a broad prospect and space for the structural innovation and optimization of various products. Compound processing can complete the processing of complex parts on one machine, avoiding workpiece handling and multiple clamping between procedures, shortening the processing chain, and improving processing quality.

High-speed machining greatly improves machining efficiency. In addition to focusing on high efficiency, high-efficiency machining also considers high energy efficiency and high efficiency. The integration of automation systems such as automatic skateboard exchange, robot loading and unloading, flexible manufacturing cells and systems are important measures to further improve labor productivity and an important way for the sustainable development of the machine tool industry.

The linear motor and direct drive greatly simplify the mechanical transmission structure of the machine tool. The movement and rotation of the moving parts of the machine tool are directly provided by the servo motor, which obviously improves the dynamic performance of the machine tool and makes the “zero transmission” machine tool a reality, which is more able to meet the needs of high-speed and high-precision machining.

The forward-looking control and trajectory smoothing processing technology of the CNC system, the position and speed precision control technology, the factory bus and network technology have significantly improved the dynamic performance and control accuracy of the system, and ensured the high-speed, high-precision and stability of the multi-axis linkage of the CNC machine tool. And reliability.

2. The status quo of CNC machining technology in my country

In recent years, my country’s CNC machining technology has developed rapidly, and domestic CNC lathes can fully meet the needs of the domestic market. With high-performance horizontal turning centers and turning-milling centers, some products have been able to meet the requirements of some domestic high-end users through joint ventures, technology introduction and independent development. However, horizontal turning-milling composite machining centers, horizontal turning centers with Y-axis or C-axis, dual-spindle horizontal turning centers and high-precision horizontal turning centers still mainly rely on imports.

The domestic vertical machining center is relatively mature in technology, and its technical performance is close to the international level. There are many manufacturers and a certain batch, which has been recognized by domestic users. Due to its cost-effective advantages, the maintenance service cost after the warranty period is relatively low, which can basically meet the needs of the domestic market. The current key is to vigorously improve product quality and reliability, and strengthen pre-sales and after-sales services.

Although the domestic horizontal machining center can meet the needs of the market, there is still a certain gap in accuracy and performance compared with similar foreign products. Most of the foreign horizontal machining centers are equipped with temperature compensation systems, which have high positioning accuracy and good accuracy retention. Therefore, in recent years, more horizontal machining centers have been imported. In terms of high-speed machining centers and five-axis machining centers, domestic companies have developed many new products. However, most products have not undergone strict production tests, and it is difficult to obtain universal recognition from users. Only a few varieties enter the production site of the enterprise. The key lies in the need to pass the production assessment of different types of users, and to continuously improve and perfect. High-precision (sub-micron and nano-level) machining centers are basically in a blank state in my country, and most of them rely on foreign imports.
The performance of domestic CNC gear machine tools is roughly equivalent to the international level. Except for individual high-precision CNC gear processing machines (DIN 5~6) and high-precision CNC gear grinders (DIN 2~3) still need to be imported, most of them have been able to Replace imported products.

Electrical processing machine tools, in addition to precision electrical processing machine tools, can meet market needs. There are still gaps in the machining accuracy, surface roughness, machining methods, and software of CNC electrical machining machine tools.

The domestic CNC grinder can basically meet the needs of the domestic market. However, some high-precision, high-efficiency, and composite CNC grinding machines in CNC grinding machines have to rely on imports, such as CNC precision universal cylindrical grinding machines, CNC precision forming surface grinders, CNC crankshaft grinders, CNC camshaft grinders, and large-scale CNC grinding machines in recent years. More products such as cylindrical grinders and various CNC high-efficiency special grinders are imported.

Domestic CNC heavy-duty metal cutting machine tools have a great advantage in price, and the price is only about half of that of similar foreign products. Through independent development and actual production application and assessment in recent years, except for some super-heavy, multi-axis control, Except that there are no domestic products for precision, most of them have been recognized by domestic power generation, metallurgy, mining and other equipment manufacturers.

In general, the market satisfaction of domestic CNC machine tools is not high, low-end melee, high-end fall. In 2009, imported machine tools were still as high as 5.9 billion U.S. dollars, of which metal cutting machine tools were 4.56 billion U.S. dollars and metal forming machine tools were 1.34 billion U.S. dollars. Almost all imported are high-end CNC machine tools and automatic lines.

3. The gap with foreign countries

 –  Business philosophy gap

The “market-oriented” concept of some domestic enterprises is short-sighted and narrow-minded, only limited to the quality of the product’s sales, simply selling the product, the so-called after-sales service is repairing machine tools. Focusing on customers, focusing on customer needs, providing solutions, creating value for customers, and shifting from product competition to service competition has not yet become the core business philosophy of the company. Especially for the needs of high-end customers, domestic machine tool companies often supply non-needed products and cannot supply them. Although the current situation has improved, it still has not fundamentally changed.

Some domestic companies ignore the importance of technology integration, limit themselves to the production of machine tools and equipment, and fail to realize that the integration of software and hardware will bring great potential for customers to create value. Leading foreign machine tool companies generally regard software and hardware integration as an important way to adjust their product structure. For example, DMG’s Power Tool software package, Mazak’s Cyber ​​Production management system, GF AgieCharmilles’ Smart Machine process monitoring system, Siemens 828D’s ShopMill and Program Guide programming software, etc.

 – Key technology gap

Compared with powerful machine tool manufacturing countries, my country’s CNC machine tools still have obvious gaps in terms of structure, technical level, innovation and research and development capabilities. The basic technology, key technology and common technology have not yet been fully mastered. Focus on customer needs, develop personalized products, develop specialized CNC machine tools, and provide users with a weak ability to provide comprehensive solutions.

In particular, the development of high-performance CNC systems and core functional components lags behind the mainframe, and the market share is very low, which has become the main bottleneck restricting the development of my country’s CNC machine tool industry.

The gap in key technologies is ultimately reflected in the reliability and accuracy stability of domestic CNC machine tools. Even if the large number of CNC machine tools that my country can produce and the technology is relatively mature, such as vertical machining centers, small and medium-sized horizontal machining centers, CNC lathes and other products, the market is slightly inferior due to reliability and accuracy retention. Therefore, foreign companies have a considerable market share.

 – Development strategy gap

When domestic companies formulate their development strategies, they often take the development of a certain product as the main line, and most of them are a strategy of following and imitating the products of leading foreign companies. Competitive companies should shift their sights beyond their competitors to the looming and potential needs of customers, crossing existing competitive boundaries, and transforming from positioning choices under the established market structure to changing the market structure, that is, to “guide the market.” Guiding the market is a proactive strategy, which is characterized by independent and original new technologies and new products to guide and meet the ever-evolving needs of the market, improve the technical level of customers, maximize profits for customers, and develop new profits for themselves space. It will change the structure of the market, provide advanced new products to the market, guide customers to recognize new products, use new products, and benefit from new products.

 – The road to a powerful machine tool country

The basic way for my country’s machine tool industry to transform from large but not strong to both strong and large is to transform the development mode, adjust the industry and product structure, and achieve industrial upgrading.

As China transforms from a “manufacturing country” to a “manufacturing power”, the structure and level of demand for CNC machine tools in the core manufacturing sectors of key industries in the national economy will undergo major changes. Automobiles, high-speed railways, aerospace, energy and shipbuilding industries all require a new generation of high-precision, high-efficiency, automation, energy-saving and emission-reducing CNC machine tools. There is huge room for the upgrade of my country’s CNC machine tool industry, especially high-end CNC machine tools.

We should clearly realize that if China is to become a powerhouse in machine tools, other countries will not sit idly by, and access to technology will inevitably encounter new blockades. From now on, we must rely on independent innovation. Establish an open and socialized R&D system with enterprises as the main body, combining production, teaching, research and application.

Innovation is inseparable from talents. To become a powerful machine tool country requires the hard work of a generation. There is a shortage of high-end talents, especially the leading talents in the design of high-end CNC machine tools, CNC systems and functional components, as well as the lack of senior technicians and the lack of compound management talents with international vision. The shortage of high-end talents has become a deep-seated reason restricting the rapid and sustainable development of my country’s CNC machine tool industry.

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