To create the "powers", and "made in Luoyang" building! The day before, Luoyang xinqianglian slewing bearing Limited by Share Ltd, a wholly owned subsidiary of Luoyang Shengjiu Forging Co. Ltd. for super large forging joint bearing line development of Shantou Josue channel project of 15 meters in diameter made of the shield machine, the weight of 88 tons also set a major domestic precision rolling forging ring record.
The forging diameter 8.13 meters, diameter of 7.47 meters, 1.39 meters high, weighing 88 tons, equivalent to the weight of about 70 cars, the future further processed into a joint bearing, will be applied to the Shantou su'ai channel project.
The channel tunnel project is the first domestic located in the eight degree earthquake zone, with 15 meters of super large diameter shield machine through complicated geological construction, the construction difficulty and risk in the country's leading industry of subsea tunnel.
"Joint bearing is the key component of shield machine. Because of its large volume, heavy weight and high precision, forging has become an industry difficult problem." Luoyang xinqianglian company chief engineer Hao Wenlu said that in the construction site, once caused by the failure of bearing shield machine downtime, will bring huge economic losses to the project, so the quality is very strict, must strive for forging.
According to experts, the shield machine bearing forging forging process, like dumplings when the Ramen ring, through repeated raw materials heating, rolling ring forming. The Luoyang new strong corporation applies the precision rolling ring forging technology. Through repeated research, the ratio of axial force, radial force and temperature and speed control scheme are determined. The scheme has solved the problems of poor metal flow line, poor mechanical performance, large processing allowance and complicated processing, resulting in forging error of less than 10 mm, which is far below the average level of 30 mm.
Hao Wenlu, not just the weight to create the most domestic, forging ring Luoyang xinqianglian company before the date for automatic unloading turnover machine track project Huadian heavy equipment Co. Ltd. Caofeidian forging 11 meters in diameter, the diameter of the ring forgings has created the world record.
In addition, 3.65 meters in diameter shield machine main bearing to build the company has been successfully applied to the world's first AP1000 nuclear power group Zhejiang three nuclear power station cross sea water tunnel project, the project to help overcome the complex conditions of Ayama Xuantakeiwa, the successful completion of construction. The day before, the nuclear power unit project successfully entered the final testing stage.
In recent years, the Luoyang new strong joint company in the domestic large slewing supporting areas outshine others, has 55 related national patents, including 4 invention patents. The company has developed the main bearing of shield machine and 2 Mb magnetic Ohayon DPMG three row roller bearing and other innovative products, to break the shield machine main bearing and fan spindle bearing entirely dependent on foreign imports, two scientific research achievements respectively won the two prize Chinese machinery industry science and Technology Award and three prize.