The first domestic double-gantry mobile mechanical five-axis linkage CNC boring and milling machine developed by Jinan Second Machine Tool Group Co., Ltd. has passed the national acceptance. The China National Machinery Industry Federation and the State Council Three Gorges Project Construction Committee Phase III project major equipment manufacturing inspection team jointly hosted the appraisal meeting and demonstration meeting of the five-axis linkage CNC boring and milling machine products in Liaoning Province at the end of last month.
The XKV2745×200 CNC boring and milling machine successfully developed by Jiji Machine broke the monopoly of foreign technology and solved the problem of large-scale turbine blade processing equipment urgently needed by the national power generation industry.
In the past, the five-axis linkage CNC machine tool produced in China uses the electric spindle as the spindle head, and the output torque is small, which is mainly applied to the processing of small parts of non-ferrous metals. Large-scale water pump blades, ship propellers, aircraft propellers, turbine rotor blades, high-precision stamping dies and other machining parts, large diameter, large processing area, and large machining allowance, must use high-power, high-torque mechanical transmission five-axis linkage Milling head. However, the core technology of this mechanical transmission five-axis linkage is only available to a few developed countries such as Germany, France and Italy.
At present, China's large-scale hydropower equipment, water conservancy transportation equipment, ship propellers, automobile molds and other complex surfaces of high-precision, heavy-cutting processing, key projects for the national key investment projects South-to-North Water Transfer, Three Gorges Water Conservancy, West-East Gas Transmission, and basic equipment processing This type of machine tool is urgently needed. In particular, the processing of large turbine blades relies entirely on imported equipment, and the domestic market demand is quite large.
Therefore, the development of mechanical transmission five-axis linkage CNC boring and milling machine equipment with completely independent intellectual property rights has become a top priority.
In 2006, commissioned by the National Three Gorges Construction Committee, Jinan No. 2 Machine Tool undertook the responsibility of developing this first major project. They carried out technical research in many aspects, and after several efforts, finally made a breakthrough. The product was delivered to the customer Angang Heavy Machinery Corporation in less than a year. This product uses advanced five-axis linkage heavy cutting characteristics to complete the precise cutting of complex three-dimensional surfaces, improve the precision and smoothness of the workpiece surface, reduce or eliminate the manual grinding of the subsequent order, thus solving the need to improve Production efficiency must raise the difficulty of the precision of the machined parts, meet the needs of China's Three Gorges Project and major power generation, shipbuilding, and military industries, and get rid of dependence on foreign technology.
Lu Yanwei, Special Advisor of China Machinery Industry Federation, recalled that this project started in May 2006 and lasted for 3 years, and the effect was very good. Jinan No. 2 Machine Tool dared to undertake this arduous task and Angang Heavy Machinery Co., Ltd. dared to be the first to eat crabs is the two key to the success of this major project.
Bi Zhichao, chairman of Anshan Heavy Machinery Co., Ltd., believes that the machine has been used for more than one year, and its performance has completely exceeded all the blade processing machines in the past. It has played an important role in breaking through the bottleneck of hydropower blade processing and for the development of China's hydropower industry.
Zhang Tiande, executive deputy general manager of Dongfang Motor Co., Ltd. said that the mechanical CNC milling head has a high torque and a high technical content, which is a very big improvement. He believes that this move will play an important role in China's hydropower manufacturing, shipbuilding industry, and even the construction of the defense industry.
Lu Yanwei, Special Adviser of China Machinery Industry Federation, Huang Ling, Deputy Director of Technology and Equipment Department of the State Council Three Gorges Construction Committee, Li Dongru, Director of Science and Technology Work Department of China Machinery Industry Federation, and experts and users from research institutes and key industries such as electric power and heavy machinery A total of more than 80 people attended the presentation.