学 号： 200606040217
HEBEI POLYTECHNIC UNIVERSITY
课程设计
论文题目: 1250热轧板带轧制规程设计
学生姓名：杨亮飞 专业班级：06成型2班 学 院：冶金与能源学院 指导教师：郑申白 教授
2010年03月12日
河北理工大学06级成型课程设计 目录
目 录
1 产品特点和轧制特点 1 2原料及产品介绍 2 3 轧机的选择 3
3.1 轧机布置 ································································································································· 3 3.2 立辊选择 ································································································································· 4 3.3 粗轧机的选择 ························································································································· 5 3.4 精轧机的选择 ························································································································· 5 4 压下规程设计 7
4.1 压下规程设计 ························································································································· 7 4.2 道次选择确定 ························································································································· 7 4.3 粗轧机组压下量分配 ············································································································· 7 4.4 精轧机组的压下量分配 ········································································································· 8 4.5 校核咬入能力 ························································································································· 9 4.6 确定速度制度 ························································································································· 9 4.7 轧制温度的确定 ··················································································································· 12 4.8 轧制压力的计算 ··················································································································· 13 4.9 辊缝计算 ······························································································································· 16 4.10 精轧轧辊转速计算 ············································································································· 16 4.11 传动力矩 ····························································································································· 17 5 轧辊强度校核与电机能力验算 19
5.1 轧辊的强度校核 ··················································································································· 19
5.1.1 支撑辊弯曲强度校核·································································································· 19 5.1.2 工作辊的扭转强度校核······························································································ 21 5.2 电机的校核 ··························································································································· 22
5.2.1 静负荷图······················································································································ 22 5.2.2 主电动机的功率计算·································································································· 23 5.2.3 等效力矩计算及电动机的校核·················································································· 23 5.2.4 电动机功率的计算······································································································ 24
6 板凸度和弯辊 25
6.1 板型比例凸度计算 ··············································································································· 25 6.2 板型控制策略 ······················································································································· 26 6.3 凸度控制模型 ······················································································································· 27 6.4 影响辊缝形状的因素 ··········································································································· 28
6.4.1 轧辊挠度计算·············································································································· 28 6.4.2 轧辊热膨胀对辊缝的影响·························································································· 29 6.4.3 轧辊的磨损对辊缝的影响·························································································· 31 6.4.4 原始辊型对辊缝的影响······························································································ 31 6.4.5 入口板凸度对辊缝的影响·························································································· 32 6.5 弯辊装置 ······························································································································· 32
6.5.1 弯曲工作辊·················································································································· 32 6.5.2 弯曲支撑辊·················································································································· 32
I
河北理工大学06级成型课程设计 目录
6.6 CVC轧机的抽动量计算 ········································································································ 33 参考文献 ······································································································································ 36
II
河北理工大学06级成型课程设计 1产品特点和轧制特点
1 产品特点和轧制特点
不同宽度的热带有不同的用途，也需采用不同工艺技术。热带300mm以下是窄带，多用来生产焊管。300~600mm为中窄带，常用来生产五金或焊接结构梁。600~1000mm为中宽带，薄带卷可以冷轧用于家电。这些产品的轧机一般不安装昂贵的液压压下、弯辊、板型控制设备，只能依靠坯料加热温度控制轧制力，调节板型。
1100~1500mm为宽带，最宽为2000mm，它们的轧机都安装液压压下、在线弯辊、板型控制。2000mm超宽热卷多是用于冷轧镀锌汽车板，由于宽带质量优良，国外主张取消中窄带，用超宽带进行纵剪分切，得到不同宽度卷材，提高成材率。
轧辊越窄，板型凸度控制越容易，且市场对于1m以下冷轧板材，如家电板、家具板或汽车辅助板有较大需求，故按照设计任务书要求，设计典型产品为1m板材，生产厚度精度高、板型优良、表面光洁度高的高档次多品种、宽范围多规格热轧带卷。
1250热带轧机适合轧制带宽为600~1000mm左右的板材。本设计要求既可以生产冷轧需要的2.2mm薄卷，也可生产25mm结构用厚带。
连轧生产具有时间短、温降少、占地少、产量高的特点。1926年，自从美国第一台带钢热连轧机投产以来，连轧带钢得到很大的发展。从手动调节到PID设定，从简单计算机控制到计算机系统多层分布式控制，加上液压压下，液压弯辊，CVC辊型控制等新技术的使用，热连轧机的产量、精度、板型质量得到很大提高。热轧带钢生产线主要包括粗轧和精轧。粗轧轧件短，一般为可逆轧制，精轧为6~7架连轧，成为1/2连轧或3/4连轧。目前，粗轧轧机控制能力越来越强，中间坯凸度命中率大大提高，从粗轧就检测凸度和厚度，为精轧提供优质中间坯料，保证精轧稳定轧出符合技术要求的带卷。粗轧采用大压下，可以减少道次，提高中间坯温度。近来坯料厚度也恢复到原来220mm以上，为多品种、高档次产品生产奠定基础。
课程设计是指定原料厚度的压下规程设计，故热连轧压下规程设计任务包括辊缝、轧辊转速、板凸度、轧辊加工凸度、弯辊力和辊型控制量（CVC抽辊量）的现场轧机工作参数确定。
1
河北理工大学06级成型课程设计 2 原料及产品介绍
2原料及产品介绍
依据任务要求典型产品所用原料：
原料规格：
板坯厚度：250mm 钢 种：Q195 最大宽度：1050mm 长 度：8.5m
产品规格：
厚 度：2.6mm 板凸度：0~6
坯料单重：18吨
因为所给坯料宽度较小，并且在粗轧机前部安装有大立辊，所以侧压较为有效，可以少量控制成品宽度。
坯料选用250mm厚需要较多道次，但对保证压缩比，生产优质板材具有重要意义，生产普板时可以降低原料厚度，以减少道次，增加产量。
坯料长度限定8.5m，加热炉内宽度9.2m，有利于设计高温（1350℃）步进炉，以便为今后生产高牌号硅钢、低合金管线钢储留设备能力。
2