2.2. The necessity of macroscopic transformation From a macro perspective, military and civilian machinery industries in industrialized countries have begun to apply CNC machine tools on a large scale in the late 1970s and early 1980s. Its essence is to use information technology to carry out technological transformation of traditional industries (including military and civilian machinery industries). In addition to the use of CNC machine tools, FMC, FMS in the manufacturing process, it also includes the implementation of CAD, CAE, CAM, virtual manufacturing in product development and the implementation of MIS (Management Information System), CIMS and so on in production management. And increase the content of information technology, including artificial intelligence, in the products it produces. Due to the in-depth transformation of foreign military and civilian machinery industries (called informationization) by using information technology, their products have finally become more competitive in the international military and civilian products market. And we are about 20 years behind the developed countries in information technology transformation of traditional industries. For example, in China's machine tool ownership, the proportion of CNC machine tools (digital control rate) was only 1.9% in 1995, while Japan had reached 20.8% in 1994. Therefore, a large number of mechanical and electrical products are imported every year. This also explains the necessity of numerical control transformation of machine tools from a macro perspective. Previous page next page Pipe Clamp,Hose Connector,Pipe Fitting Jiekelong Precision Manufacturing Co., Ltd. , http://www.nbcoupling.com
Third, the machine tool and production line CNC transformation market 3.1, machine tool numerical control transformation market China's current total of machine tools more than 380 million units, and the total number of CNC machine tools is only 113,400 units, that is, China's machine tool numerical control rate is less than 3%. In the past 10 years, the annual output of CNC machine tools in China is about 0.6-0.8 million units, and the annual output value is about 1.8 billion yuan. The annual output of the machine tool is 6%. More than 60% of China's machine tools have been in service for more than 10 years; less than 20% of automatic/semi-automatic machines are available for machines under 10 years, and there are only a handful of automated production lines such as FMC/FMS (60% for automatic and semi-automatic machines in the US and Japan). the above). It can be seen that most of the manufacturing and processing equipment of most of our manufacturing industries and enterprises are traditional machine tools, and more than half of them are old machine tools with a service age of more than 10 years. The products processed with this equipment generally have poor quality, low variety, low grade, high cost and long delivery period, so they lack competitiveness in the international and domestic markets, directly affecting a company's products, markets, benefits, and influence. The survival and development of enterprises. Therefore, it is necessary to greatly improve the numerical control rate of the machine tool.
3.2. Numerical control transformation market of imported equipment and production lines Since the reform and opening up in China, many enterprises have introduced technology, equipment and production lines from abroad to carry out technological transformation. According to incomplete statistics, from 1979 to 1988, there were 18,446 technical transformation projects introduced nationwide, about 16.58 billion US dollars.
Most of these projects have played their due role in China's economic construction. However, due to various reasons, some of the imported projects are not functioning properly or even paralyzed, which has affected the efficiency of the enterprise and seriously caused the enterprise to be in trouble. After some equipments and production lines were introduced from abroad, some of them were not well absorbed and absorbed, spare parts were incomplete, improperly maintained, and the results were not working properly. Some introduced only attention to the introduction of equipment, instruments, production lines, neglecting software, technology, management, etc., resulting in projects not Complete, the potential of the equipment can not be played; some can not even start the operation, did not play its due role; some products of the production line sell well, but because the equipment failure can not reach the standard; some because of high energy consumption, low product qualification rate It has caused losses; some have been introduced for a long time and require technical updates. For various reasons, some equipment not only does not create wealth, but consumes wealth.
These unusable equipment and production lines are a burden, and they are also a large stock of assets. If they are repaired, they are wealth. As long as we identify the main technical difficulties and solve the key technical problems, we can minimize the investment and revitalize the largest stock assets, and strive for the greatest economic and social benefits. This is also a huge transformation market.
Fourth, the content and advantages and disadvantages of CNC transformation 4.1, the rise of foreign transformation industry In the United States, Japan and Germany and other developed countries, their machine tool transformation as a new economic growth industry, business is full, is in the golden age. Due to the continuous advancement of machine tools and technology, machine tool transformation is an "eternal" subject. China's machine tool transformation industry has also entered the new industry dominated by numerical control technology from the old industry. In the United States, Japan, and Germany, the use of numerical control technology to transform machine tools and production lines has a broad market, and has formed a new industry for machine tool and production line CNC transformation. In the United States, the machine tool transformation industry is called the machine tool regeneration (Remanufacturing) industry. Well-known companies engaged in the recycling industry are: Bertsche Engineering, Ayton Machine Tool, Devlieg-Bullavd (Dabao) Service Group, US Equipment Company, etc. American Depot has opened a company in China. In Japan, the machine tool transformation industry is called the Retrofitting industry. Well-known companies engaged in the conversion industry include: Otsuka Engineering Group, Gangsan Machinery Co., Chiyoda Machinery Co., Ltd., Nozaki Engineering Co., Hamada Engineering Co., Ltd., Yamamoto Engineering Co., Ltd., etc.
4.2. The content of numerical control transformation The main contents of the numerical control transformation of machine tools and production lines are as follows:
The first is to restore the original function, diagnose and recover the faulty parts of the machine tool and the production line;
The second is NC, adding a digital display device to an ordinary machine tool, or adding a numerical control system, and transforming it into an NC machine tool and a CNC machine tool;
The third is refurbishment. In order to improve the accuracy, efficiency and automation, the mechanical and electrical parts are refurbished, the mechanical parts are reassembled and processed, and the original precision is restored. The CNC system that does not meet the production requirements is updated with the latest CNC;
The fourth is technical upgrading or technological innovation. In order to improve performance or grade, or to use new technologies and technologies, large-scale technical upgrading or technological innovation will be carried out on the original basis, and the level and grade of upgrading will be greatly improved. .
4.3. Advantages and disadvantages of numerical control transformation 4.3.1 Reduced investment amount and short delivery time Compared with the purchase of new machine tools, generally 60% to 80% of the cost can be saved, and the transformation cost is low. Especially for large and special machines, it is especially obvious. Generally, large-scale machine tools are rebuilt, only 1/3 of the cost of new machine tools is purchased, and the delivery time is short. However, in some special cases, such as the production and installation of high-speed spindles and pallet automatic exchange devices, it is too laborious and costly. The cost of retrofitting is often increased by 2 to 3 times. Compared with the purchase of new machine tools, it can only save about 50% of investment.
4.3.2 The mechanical properties are stable and reliable, and the basic parts such as the bed and column used by the structure are heavy and strong casting components, not the welded components. The modified machine tool has high performance and good quality, which can be used as new The device continues to be used for many years. However, due to the limitations of the original mechanical structure, it is not advisable to make a breakthrough transformation.
4.3.3 Familiar with the equipment, easy to operate and repair When purchasing new equipment, do not know whether the new equipment can meet its processing requirements. The transformation is not the case, the machining capacity of the machine tool can be accurately calculated; in addition, due to the use of the machine for many years, the operator has already understood the characteristics of the machine tool, and the training time is short and effective in operation and maintenance. Once the modified machine tool is installed, it can be fully loaded.
4.3.4 Existing conditions can be fully utilized to make full use of existing foundations without having to rebuild the foundation as when purchasing new equipment.
4.3.5 The latest control technology can be used to improve the automation level and efficiency of production equipment, improve the quality and grade of equipment, and change the old machine tool into the current level of machine tools according to the development speed of technological innovation.