四辊方管定径机架的设计 摘要 方管，顾名思义，它是种方形体的管型，很多种材质的物质都可以形成方管体，大多数方管以钢管为多数，多为结构方管，装饰方管，建筑方管等。方管，是方形管材的一种称呼，也就是边长相等的的钢管。是带钢经过工艺处理卷制而成。一般是把带钢经过拆包，平整，卷曲，焊接形成圆管，再由圆管轧制成方形管然后剪切成需要长度。一般是50根每包。 用于大直径热轧无缝钢管生产的二辊式定径机虽然技术成熟，但由于受孔型半径差大、孔型侧壁对轧件有效高、外径尺寸精度较低；由于内传动三辊式定径机的每个几家都需要两对规格较大的螺旋锥形齿轮，但国内加工该试论困难，而外传动三辊定径机则需要在底下布置电机，基建投资较大。 为了克服二辊式定径机生产钢管尺寸精度低的弱点，基于目前的条件，在借鉴热轧方矩形管和焊管生产定径技术的基础上，设计出用于无缝钢管生产的四辊式定径机。 关键词：定径机；方管；无缝钢管；设计计算 Abstract Tubes, as the
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n 目录 摘要1 Abstract 2 1引言3 1.1概述3 1.1.1我国无缝钢管生产和装备的发展历程3 1.1.2方管4 1.1.3四辊方孔型机架特点7 2四辊定径机系统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11 2.2.1性能参数12 2.2轧制力辊的设计计算12 2.2.1辊子的布置方案设计12 2.2.2轧制力的计算12 2.2.3轧辊的几何参数及材质选用13 2.2.4轧辊结构设计14 2.2.5轧制总压力的确定14 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附加力矩错误！嵌入对象无效。的确定16 2.3.3主电机的选择16 2.4齿轮传动设计17 2.4.1选取材料，定许用应力17 2.4.2按齿根弯曲疲劳强度设计17 2.4.3校核齿面接触疲劳强度20 2.5主传动轴的设计20 2.5.1最小轴颈的估算20 2.5.2联轴器部位花键的设计21 2.5.3鼓型齿的设计21 2.5.4轴承段轴的设计22 2.5.5环的设计23 2.5.6轴承套的设计24 2.6轴承寿命计算27 3液压调速系统设计28 3.1系统的工况分析28 3.2执行元件的负载计算28 3.3拟定液压系统图29 3.4液压系统工作压力的计算29 3.5选取液压马达30 3.6选取液压泵30 3.7选择控制阀30 3.8管件的选择31 3.9液压系统的验算31 4定径机的润滑和冷却32 4.1定径机的润滑系统32 4.1.1润滑的特点和作用32 参考文献34