This paper discusses the reliability estimating method of fatigue lifespan. Reliability estimating of metallurgy crane is introduced.

讨论了疲劳寿命的可靠性评估方法，并对冶金起重机的疲劳寿命进行了可靠性评估。

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Failure analysis of side rail box imitating chief beam of metallurgy crane was studied. Cause of fatigue failure and improving method were given.

介绍了冶金起重机金属结构偏轨箱形模拟主梁的疲劳失效分析研究结果，提出疲劳失效的原因及改进措施。

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In order to improve the power of function of metallurgy stock crane, the system of transducer drive based SIEMENS PLC was given in this paper.

为了提高冶金原料吊车的运行能力，本文给出了基于西门子PLC的变频器驱动系统。

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