摘要 无缝钢管具有中空截面，大量用作输送流体的管道，如输送石油、天然气、煤气、水及某些固体物料的管道等。无缝钢管的生产在西方国家里占管类钢材比例的50%，而在我国的生产还和西方有一定的差距，不过对它的生产进行了大量的投入，有望在本世纪赶上，不仅在数量上还需要在质量上有所超越。 本设计主要内容为：三辊定径机的设计。在原先只采用两辊式定径机存在的弊端做一改造采用三辊定径机。其两者的区别主要是：前者可调但定径精度低，工具备件少；后者定径精度高但不可调，机架备件多。其实现在已经出现了新型可调式三辊定径机，因此这种新型三辊定径机的出现将给我国无缝钢管的发展提供一个新台阶。 今后，我国无缝管材的生产反将转到采用先进制造技术，扩大品种，提高质量，降低消耗方面来。因此，我们应该努力学好本专用知识，争取进一步有所改进有所创新。 关键词：三辊定径机；无缝钢管；传动装置；设计计算 Abstract The productio
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n 目录 1绪论5 1.1概述5 1.2无缝管生产简介5 1.3本章小结8 2三辊定径机系统设计9 2.1总体方案9 2.1.1轧辊机架的确定9 2.1.2传动装置的确定10 2.2参数计算12 2.2.1性能参数13 2.2.2机架的确定13 2.2.3轧制总压力的确定13 2.2.4轧制力矩的确定15 2.3总功率的验算及电机的选择16 2.3.1与轧辊轴相联接的减速器的确定16 2.3.2附加力矩的确定17 2.3.3主电机的选择17 2.4本章小结18 3齿轮及轴系设计19 3.1齿轮传动设计19 3.1.1选取材料，定许用应力19 3.1.2按齿根弯曲疲劳强度设计19 3.2主传动轴的设计22 3.2.1最小轴颈的估算22 3.2.2联轴器部位花键的设计23 3.2.3鼓型齿的设计23 3.2.4轧辊的设计24 3.2.5轴承段轴的设计24 3.2.6自由轴段的设计26 3.2.7环的设计27 3.2.8轧辊右侧轴段的设计29 3.2.9右端盖的设计30 3.2.10轴承套的设计31 3.3从动轴的设计32 3.4本章小结33 4轴的校核34 4.1主传动轴的校核34 4.2键的校核38 4.3从动轴的校核38 4.4校核齿面接触疲劳强度38 4.4.1确定齿面接触疲劳许用应力38 4.4.2校核齿面接触疲劳强度39 4.5轴承寿命计算39 4.6本章小结40 5参考文献41