Abstract After the outbreak of the financial crisis in 2008, the overall decline of the electric machine tool industry in 2009, with the promotion of 4 trillion yuan, the industry as a whole rebounded in 2010, but did not reach the highest value at the peak of the industry development, and began again in 2011. Sliding until 2...
There are two reasons for this. One is the macroeconomic reasons, and the other is the lack of high-end technology.
During the period of 2011-2014, although the environment is not good, there is still a large room for the market demand for high-end electric machine tools. Due to the serious lack of high-end technology in domestic electric processing enterprises, the high-end market can only be handed over to foreign counterparts. However, since the second half of 2014, the demand for high-end machine tools has also begun to decline, thus further exacerbating the harsh environment in the electrical processing industry.
China's electric processing industry main product development status 1, CNC fast wire (reciprocating wire) EDM wire cutting machine
This type of machine tool is unique to China and has a large volume. During the "Twelfth Five-Year Plan" period, through the comprehensive improvement of the pulse power supply, the host precision, the numerical control system and other technologies of the machine tool, the cutting technology was implemented, the processing performance was obviously improved, the cutting precision was able to reach ±0.008mm, and the surface was rough. The degree of Ra is 0.8μm, and the maximum cutting efficiency is 150~200mm2/min, which makes up for the defects of low efficiency, poor precision and poor surface quality of such machine tools, and better meets the requirements of users, but the stability of processing indexes of such machine tools Still to be further improved. This kind of machine tool is now commonly known as “Middle Wireâ€, which is an important symbol for the successful transformation and upgrading of the main products of China's electric processing industry. It has been widely recognized by users, and the electric processing enterprises that produce such products have also gained new vitality.
2, slow wire (one-way wire) CNC EDM cutting machine
The one-way wire EDM wire cutting machine has been able to provide users with four-axis linkage, cutting accuracy of ±0.004mm, machined surface roughness Ra0.4μm, and first cutting efficiency of 150mm2/min. This type of machine tool has the function of automatic threading. It can use the A-axis and other axes to process complex parts. It can partially meet the processing requirements of precision and complex parts in aerospace and precision mold manufacturing. However, there is a significant gap between such products in terms of processing accuracy, surface quality, cutting efficiency and filament cutting compared with advanced foreign standards.
3. CNC EDM machine tool
With the support of relevant national projects and policies, EDM machines have made great progress. China has been able to develop and produce five-axis linkage CNC EDM machine tools for the overall leaf disc processing of aerospace engines, breaking through the technological blockade of Western countries against China. The machine tool realizes five-axis full-closed control, linear axis positioning accuracy ≤0.005mm, repeat positioning accuracy ≤0.002mm, rotary axis positioning accuracy ≤15′′, optimal surface roughness Ra0.08μm, titanium alloy processing efficiency 829mm3/min, It has reached the international advanced level. The overall domestic progress of such products is indeed large, the gap with foreign countries is much shorter, and the high-end market share has improved a lot, and the effect is very good.
For the development of the industry, we must not only see the progress side, but also pay attention to the shortcomings. Objective analysis of the reasons for restricting the rapid development of the electrical processing industry, in addition to the limited conditions of the enterprise itself, the state support is not enough and has no impact. After all, the technical content of electric machine tools is quite high, and it requires long-term unremitting efforts.
Electric machine tool development trend
As an important processing and manufacturing method, electrical processing can solve the manufacturing and manufacturing problems that are difficult to solve by traditional processing methods. Therefore, in aerospace, aviation, navigation, military, automotive, high-speed rail, electronic information, precision instruments, medical equipment, bioengineering, energy Important manufacturing fields such as equipment, CNC machine tools, precision molds, etc. play an increasingly important and indispensable role, and have played in some areas and will further play the role of mainstream manufacturing equipment. With the new technological industry changes, electrical processing will surely achieve greater development and wider application. In the 15 years from the 13th Five-Year Plan to the 15th Five-Year Plan, the electro-processing technology and equipment are driven by innovation, and it is expected to present five major development trends: “unique, intelligent, integrated, green and high-qualityâ€.
1. Unique: Electrical processing will continue to deepen the study of the use of physical and chemical effects and multi-energy field composite effects, explore new processing methods, and innovate and develop its unique and special processing and manufacturing performance to solve a new round of technological industry transformation. The ever-increasing processing and manufacturing problems that are difficult to solve in the traditional processing methods have more prominently played an irreplaceable role in electrical processing and continuously enhanced its unique competitive advantages.
2. Intelligence: For the electric machine tool, the intelligent control has actually appeared since the moment of its birth. Because there is no intelligence, there is no electric machining, and it is inseparable. Of course, at present, it is only in the middle and early stage of intelligence. The road ahead is still very long. It needs to be firmly along this path of intelligentization. This is the inevitable choice for electric processing technology to move to the high end and occupy the high point of competition.
3. Green: Green has two meanings for electric machine tools. One is its own green development, and the damage to the environment is as small as possible. The second is to provide equipment for green manufacturing.
4, fusion: one is the fusion of electrical processing technology; another is the integration with other technologies, such as the integration of laser, gold cutting and other technologies.
5, high quality: electric processing in the future to go to the high end, we must ensure that it has a stable quality. It can be said that the pursuit of high quality and high quality is the eternal theme of any product at any time. Throughout the development of the enterprise, it is also the foundation and foundation of enterprise development.
Of course, to strengthen our country's electric processing dreams depends on the continuous innovation and continuous efforts of the whole industry to achieve, and there is a long way to go.
(Author Xiao Xiaoyan; this article is the original work of the China Machine Tool Industry Association website, please indicate the source and author's name.)
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