The thick rectangular steel plate is processed into a special shape such as "saddle shape" and "sailing shape" to create a streamlined outer body of the ship. For a long time, the key program of this shipbuilding industry has not been able to get rid of the "manual operation" method, its efficiency and low precision have become a problem that plagues the world shipbuilding industry.
"This is truly independent intellectual property rights." Recently, the academician Wu Yousheng, an academician in the structural mechanics of domestic ships, and the academician of the mechanical engineering, Mr. Duan Zhengcheng, and other experts expressed their affirmation of an independent innovation product in China's shipbuilding industry. This kind of equipment, called "skwb-800 ship 3D CNC bending machine", revolutionized the problem of the world shipbuilding industry. For the first time, it introduced "automation" into the entire hull plate processing, using special calculations. And the control software automatically performs the ship plate forming process, which abandons the traditional manual experience and increases the overall shipbuilding efficiency several times. The expert group believes that the aircraft has reached the international leading technology level in general.
China is a big shipbuilding country. According to statistics, in 2011, China's shipbuilding completion volume, new orders, and hand-held orders ranked first in the world, but China's shipbuilding technology level is about 10 years behind the world's advanced level. As a key process in hull processing, for a long time, the three-dimensional curved surface of the hull resembling "saddle" and "surfboard" can only be manufactured by manual machining or water-fire forming. The former relies on experience, and the latter easily changes the internal structure of the steel plate.
In 2008, Shandong Shuoli Machinery Manufacturing Co., Ltd. spent more than 20 million yuan with Wuhan University of Technology to start research and development of the project, which lasted for 4 years. Jiao Hetong, chairman of the company, told the reporter that the outer plate processing is plastic deformation, the bending process will produce rebound, and it is easy to produce wrinkle deformation, which is especially difficult for automatic molding. The equipment solves the above problems by using three-dimensional numerical control cold bending technology of metal plate parts with independent intellectual property rights and "fast stepwise approximation bending forming method" and "non-uniform rational b-spline surface reconstruction method". The technical equipment can be widely used in other sheet metal forming needs in various fields of the national economy, and large-size products are being assembled. The project has obtained a number of domestic and foreign patents, including an international patent pct involving the United States, Japan, South Korea, Europe and so on.
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