船用曲轴是大型船用发动机的重要部件，而曲拐是曲轴的关键部分。
Crankshaft is a very important component of large Marine engine and its key part is crank.
通过模拟分析曲轴成形的塑性流动规律，找出了大型船用曲轴曲拐成形过程中的典型缺陷连杆颈和曲柄臂外侧折叠的成因。
Based on the analysis of plastic flow law in crankshaft forming, the cause of typical forming defects, i. e. the folding existing in the crankshaft pin and crank arm was found out.
曲拐是大型船用发动机曲轴的重要部件。
Crank is a very important component of crankshaft in large Marine engine.
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