Talking about the electric spindle occupies the numerical control machine tool market industry development space is huge

    Electric spindle is the latest in the field of machine tools in the field of machine tool spindle and spindle motor integration of new technology, in the high-end CNC machine tools widely used. It with the linear motor technology, high-speed tool technology together, will be high-speed processing to a new era. But unfortunately, as an important part of CNC machine tool components, the localization rate of the spindle is very low, the current CNC machine tools used by the need for imports of 60% of the spindle. In this regard, the experts pointed out that the localization of the spindle is technically not difficult, so it is necessary to increase its development. If you do not improve the localization rate of the spindle, blindly rely on imports, not only will waste more foreign exchange, and will restrict China's CNC machine tool self-satisfaction rate.

    The spindle is specifically a set of components, including the motor spindle itself and its accessories: electric spindle, high frequency frequency conversion device, oil mist lubricator, cooling device, built-in encoder, tool changer and so on. The level of technical level of the spindle, the performance of the pros and cons as well as the overall level of social support, are directly determine and affect the CNC machine tool technology and performance, but also restricts the development speed of the host. International high-performance, high-speed, high-precision CNC machine tools commonly used spindle unit. In the multi-workpiece composite processing machine, multi-axis linkage polyhedron machine, parallel machine tool and flexible processing unit, the spindle is more irreversible mechanical spindle superiority.

    The price of the spindle from tens of thousands of dollars to several hundred thousand dollars, in the machine tool cost constitute a certain proportion. The quality, performance and level of the spindle are largely determined by the quality, performance and level of the machine. To this end, the Japanese scholar will include the main component industry, including the spindle, as the "midfield" industry, The implication of the term "midfield" is that it is in the "midfield" position in the industrial chain from raw material to machine, and the other is the key to winning whether it can control "midfielder".

    The role of the spindle in the CNC machine tool is more and more important, mainly because the current machining process requires the spindle speed is getting higher and higher, so the high speed is becoming a measure of a product level. Who used a higher speed of the spindle, who in the fierce competition has a hard card. Therefore, the development trend of the spindle is: professional manufacturers to produce high-quality electric spindle to replace the machine tool manufacturers to produce their own traditional spindle, thereby improving the speed of CNC machine tools to enhance the competitiveness of CNC machine tools.

Domestic spindle greatly dependent on imports

    China's machine tool industry for the larger demand for spindle, and there are increasing trend year by year. This is mainly determined by 2 points. First, the demand for electric spindle on the domestic machine tool in more than 6000 root a year or so. According to preliminary statistics, in 2003 China's various types of spindle annual demand of about 6000, of which only about 1,000 CNC machine tool spindle, and about 60% of the imported spindle. According to the spindle function of the professional committee of the Secretary-General Zhong Hong introduced the current domestic production capacity of about 2500 sets of spindle, while the domestic demand in 8000 sets, so the supply and demand gap of nearly 6,000 sets. To an average price of 80,000 yuan per unit, the amount of imports reached more than 400 million yuan. Second, according to the machine tool industry "fifteen" development plan, by 2005 China's CNC machine tool production will reach 60,000 units, CNC machine tools using the proportion of spindle will also be increased from 2% to 10%. It is expected that by 2005, the CNC machine tool spindle will surge to 6000, accounting for about 50% of the total demand for the spindle, replace the grinding spindle market position, becoming the main force of the spindle market.

    Faced with such a large demand for electric spindle market, domestic production of the spindle did not keep up with, this is not because of China's power spindle research and development slow. In fact, as early as the 20th century, 50 years, China's bearing industry has begun to study the production of spindle. At present, the production of domestic spindle to Luoyang Bearing Institute of the most famous, it produces the hole grinding electric spindle has more than 40 years of history. In recent years, it developed the processing center, high-speed milling machine and lathe power spindle, with domestic high-speed machine tools and domestic parallel machine tools, put into use. So far has developed to 15 series, more than 100 varieties, power from 0.2 ~ 75kW, the maximum speed of 150000r / min.

    Domestic spindle imports a large number of reasons, in addition to the output did not keep up with the domestic quality of the spindle does not guarantee, but also one of the reasons. At present, China has developed a spindle power of 2.5kW ~ 29kW, torque of 4 ~ 86N.m, can be used in CNC machine tools and machining center of the spindle, and has been equipped with some domestic CNC machine tools. However, in general, the domestic spindle and foreign products compared to both the performance, variety and quality have a wide gap, so the current domestic high-speed, high-precision CNC machine tools and machining center used in the spindle, Imported from abroad.

    Is there a technical bottleneck in the production of spindle

    Low spindle localization rate is due to technical reasons? Before answering this question, you might want to hear how the experts need to analyze what technology is needed to produce the spindle. China Machine Tool Association Honorary Chairman Liangxuan Xuan will be the production of the spindle technology needs briefly summarized as "three and a half technology": precision manufacturing technology, bearing technology, motor speed control technology, motor technology. The spindle for the first three technical requirements are higher, and for the fourth technology, because the spindle for the motor technology requirements are not very high, only ordinary motor technology can be, therefore, Liang Xunxun image to its Called half a technology.

    So, the production of electric spindle technology is difficult? In this regard, the answer to the experts is no. Electric spindle expert Zhou Yanyou pointed out that the production of the spindle is a combination of several technologies, so only a single technology companies can not produce this product, such as the general bearing factory or the motor factory does not have the production of spindle ability. But this does not mean that the production of electric spindle technology required by the high, the domestic manufacturers can not achieve the scale of production. Zhou Yanyou's view is: "Spindle domesticization rate is low, a large number of products imported from abroad, there is such a situation, from the technical point of view is no reason." Zhou Yanyou analysis, the spindle does need to be integrated technology , But as long as a company has one of the technology, you can produce this product spindle. Because with other technology corresponding to the product, can be purchased. Such as bearing factory can be purchased outside the motor, and the motor factory can also be purchased bearings, which is some of the world's spindle manufacturers practice common practice. Is the world's top spindle manufacturers do not have a full set of technology, they also purchased products or technology. Electric spindle production from the technical level, in fact, is the need for accurate assembly, processing capacity. That is, all parts are purchased, the final product of the profits are not low. Especially in the domestic labor force has a low price advantage, even if the parts imported, assembled after the completion of the production of the spindle should also be lower than the import price of similar spindle at least one-third of the price.

How to improve the localization of electric spindle

    As the production of the spindle is a cross-industry process, the need for multi-type, multi-technical cooperation, so the establishment of a type of enterprise to meet these needs, experts are discussing the problem.

    At present, there are four types of manufacturers in China: "Institute type", by the Institute, colleges and universities to support the development of enterprises from the technical support; "main plant type" by the main plant gradually separated to produce some kind Functional units mainly developed enterprises; "private enterprises", in Jiangsu and Zhejiang area a large number of private enterprises, to labor-intensive, single species; "foreign joint venture or wholly-owned", the production part of the higher level of functional components , But the volume is small, there is no independent development capability.

    For the first three kinds of enterprises, experts have their own views. In the "hospital type" manufacturers, because of their strong technical force, engaged in the industry for a long time, once the transition, technical problems can be resolved, the only need to change the system. As long as the system for market demand, such enterprises will be very competitive products. For example, Luoyang Bearing Research Institute, experts have repeatedly suggested that companies separated from the Institute, using their expertise in the spindle technology to produce such products. As for the "main plant" enterprises, Zhong Hong analysis, said the production of foreign spindle is generally divided into two ways, one is supporting manufacturers, and the other is a professional manufacturer of spindle manufacturers. Foreign OEMs generally do not produce electric spindles, so from this point, in the country from the main plant to separate the production of electric spindle business, is a trend. The "private enterprise" type of business, the experts view is that because of their market keen vision, flexible mechanism, especially in Jiangsu and Zhejiang area machine users gradually increased, for their production of machine function components to provide an opportunity, but also with customers to communicate with the geographical aspects Of the advantages of these so that they have the advantage in the production of electric spindle.

    The localization of the spindle, not only the experts are concerned about the issue, but also by the industry associations attach great importance. Although according to the domestic spindle development unit estimates, according to the current production capacity development speed, by 2005 our country can only develop a maximum of 2000 sets of spindle unit. But the Machine Tool Industry Association in accordance with the needs of the domestic CNC machine tools, functional components of the production units to strengthen the development requirements: electric spindle requirements for CNC machine tools in 2005 to achieve the total output of 3000 sets of spindle units to 2010 to reach 10,000 Sets. They said they would rationally organize human, material and financial resources to develop both good and functional parts.