Large-scale marine crankshaft made a breakthrough in localization

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Recently, China's first large-scale marine crankshaft machined by domestic machine tools was successfully launched in Qingdao Haixi Heavy Industry Co., Ltd. This marks a major breakthrough in the localization of large-scale marine crankshafts, which has changed the long-term dependence of imported large-scale machine tools for manufacturing and processing crankshafts in China, making China the third country in the world to independently produce large-scale marine crankshafts after Germany and Japan. .

In terms of processing equipment, China has only localized on hot-processing equipment such as crankshaft blank smelting equipment, vacuum casting equipment, forging and heat treatment equipment. In cold-processing equipment, special equipment such as crankshaft lathes and crank-turning vehicles are basically imported. . The “CNC Heavy Duty Crankshaft Rotary Machining Center” independently developed by Qizhong CNC Equipment Co., Ltd. has filled the gap in China and further promoted the localization of large-scale marine crankshafts, thus bringing the overall construction level of China's large marine crankshafts to a new level. .

This domestically produced machine tool is mainly used for the overall processing of the half-combined crankshaft of the marine diesel engine with a capacity of more than 10,000 horsepower. The journal, flange and crankshaft can be finished on one machine. The total weight is about 400 tons and the maximum turning diameter is Up to 4.1 meters, the maximum length of the workpiece is 14.5 meters. According to reports, the crankshaft of this off-line is 5.495 meters long and weighs 5.831 tons, and all of them are processed from domestic blanks.

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