In the more than eight years of entering the 21st century, China's national economy has maintained a healthy, sustained and rapid development momentum, creating a good environment for the rapid development of China's heavy machinery industry. In the market operation, heavy machine tool enterprises have achieved historical growth of more than 40% in terms of total industrial output value, product sales revenue, total profit, and order quantity, which is higher than the average growth rate of the national machine tool industry. Among them, the output value of CNC machine tools accounts for more than 85% of the total output value. It can be seen that the demand situation and market capacity of heavy-duty machine tools provide a very good development environment and rising space for the organization and production of heavy machinery in China.
1. The concept of heavy-duty machine tools in China and the main manufacturers according to the regulations of the former Ministry of Machinery Industry Machine Tool Bureau, the machine tools with their own weights in the range of 10-30t are large machine tools; 30-100t are heavy-duty machine tools, more than 100t are ultra-heavy machine tools . There is no new definition given by the authority.
During the “First Five-Year Plan†period, the state began to establish the first professional manufacturer of heavy-duty machine tools in China, namely Wuhan Heavy-duty Machine Tool Plant (referred to as Wuzhong) in the construction of 156 key projects. Wuzhong's products include comprehensive products such as lathes, milling machines, boring machines and grinding machines with more than 30 tons. Wuzhong produced the first heavy-duty 6.3m vertical lathe in China, and Jinan No.2 machine tool produced a heavy-duty planer with a processing width of 6.3m for Deyang. The main manufacturers that can provide heavy-duty machine tools in the planned economy era are: Wuhan Heavy Machine Tool Plant, Qiqihar First Machine Tool Plant, Qiqihar Second Machine Tool Plant, Jinan No. 2 Machine Tool Plant, Beijing Yi Machine Tool, Qinghai Heavy Machine Tool Plant, Shanghai Heavy Machine Tool Plant, A number of national backbone enterprises such as the Xianfeng Machine Tool Plant. These companies are responsible for the manufacturing of key heavy-duty processing equipment required for the construction of key national projects.
After the reform and opening up, China's national economy has entered a stage of rapid development, especially in the more than eight years since the beginning of the 21st century, providing unprecedented strategic opportunities for the development of heavy-duty machine tool products. Strong market demand has driven and promoted the emergence of China's heavy-duty machine tool industry. The situation of both production and sales is booming. Nowadays, China's own development and manufacture of heavy-duty machine tools and ultra-heavy-duty machine tools have basically met the needs of national key projects, and have created the world with the most extreme specifications. For example, China has already produced ultra-heavy CNC vertical milling with a diameter of 25m. Lathes, Φ320mm diameter floor-type milling and boring machine, CNC gantry boring and milling machine with a processing width of 5m or more, CNC heavy-duty horizontal lathe with a diameter of Φ5000mm or more, etc., have autonomous intellectual property rights and the technical level is close to the world advanced level. Heavy duty machine series.
Since entering the market economy, the tradition has been broken and the division of labor has been abolished. The production of heavy-duty machine tools in China has far exceeded the scope of the original heavy-duty machine tool factory. In the past eight years, many manufacturers that did not produce heavy-duty machine tools have expanded their reproduction and started to develop heavy-duty machine tools, and they have become bigger and bigger. At the same time, some enterprises that originally produced a single type of heavy-duty machine tools also invested a large amount of money in technological transformation, and began to develop and produce integrated products such as vertical lathes, horizontal lathes, floor milling and boring machines, and gantry milling machines. The market demand has cultivated the development and technical level of China's heavy-duty machine tool products, and has also led to the continuous expansion of China's heavy machine tool manufacturers. Under the rapid development of the national economy, under the cultivation of user demand market, the level of heavy-duty machine tools in China will continue to develop to a higher level, and the heavy-duty machine tool manufacturing team will continue to be updated and expanded.
2. Main products of China's heavy-duty machine tool manufacturing industry Under the cultivation of the market, the technical level and manufacturing capacity of China's heavy-duty machine tool products have been greatly improved. Some have reached or approached the world's advanced level, and some product technology levels have entered the world's advanced ranks. For example, vertical milling lathes, China has developed and manufactured the world's largest processing diameter 25m CNC milling and turning composite machining center, which is currently being developed and processed. Ultra-heavy vertical milling lathe with a diameter of 29m and five-axis linkage.
Heavy-duty CNC vertical lathe series products have fully met domestic needs, and some products are exported; CNC heavy-duty horizontal lathes have developed ultra-heavy-duty CNC sleepers with a diameter of 5m, a processing length of 20m and a load-bearing capacity of 500t. The world's largest load capacity, China can now produce and process CNC horizontal lathes with a maximum diameter of 6.4m. The floor-type CNC milling and boring machine series has developed the world's largest heavy-duty CNC floor-mounted milling and boring machine with a diameter of Φ320mm. In the milling and boring machine series, five-axis linkage development was completed and a batch product was formed.
The gantry type boring and milling machine is the fastest growing machine tool product with the fastest development in China. In order to meet the needs of different types of users, gantry fixed, gantry mobile, double gantry mobile, beam fixed, beam moving, gantry beam mobile, viaduct and other multi-spec products are available. In terms of specifications, China has been able to mass-produce heavy-duty CNC gantry milling machines with a processing width of more than 5m and a processing length of more than 20m.
At present, some manufacturers are developing gantry mobile CNC boring and milling machines with a processing width of 9.6m, a processing height of 8m, a processing length of 58m and a circular rotary table. In the gantry milling machine series, high-speed machining, forming processing, and five-axis linkage processing technology have been widely used. CNC Roller Grinding Machine China has developed a CNC heavy-duty roll grinder with a grinding diameter of Φ2500mm, a grinding length of 15000mm and a load-bearing capacity of 250t.
China can manufacture heavy-duty gear processing machines with a diameter of Φ12500mm. CNC machine tools such as heavy-duty crankshaft machining, deep hole machining, railway vehicles, and guide rail grinding machines have formed a series of products to meet the processing needs of various users.
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