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毕 业 设 计
题 目： 4辊轧机轧制系统设计及有限元分析
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专业： 班级： 学号： 学生姓名： 导师姓名： 完成日期：
目 录
摘要………………………………………………………………………………………… Ⅰ Abstract…………………………………………………………………………………… Ⅱ 第1章 绪论............................................................... 1
1.1 引言.......................................................................................................................... 1 1.2 研发背景及意义...................................................................................................... 1 1.3 4辊轧机轧制系统基本设计思路........................................................................... 2
1.3.1 4辊轧机的功能 ............................................. 2 1.3.2 4辊轧机轧制系统结构的基本设计思路 ......................... 2 1.4 课题的研究内容...................................................................................................... 3 第2章 轧制系统结构设计................................................... 4
2.1 引言............................................................. 4 2.2 轧辊环的设计计算................................................. 4
2.2.1 轧辊环材料的选择........................................... 4 2.2.2 轧辊环基本参数的确定....................................... 4 2.3 电动机的选择..................................................... 6
2.3.1 选择电动机的类型及结构形式................................. 6 2.3.2 轧制压力的计算............................................. 7 2.3.3 轧制总力矩的计算........................................... 8 2.3.4 电机转速的确定............................................ 11 2.3.5 电机功率的确定............................................ 11 2.3.6 电动机型号的确定.......................................... 12 2.3.7 传动各级轴的基本参数确定.................................. 12 2.4 轧辊轴的计算.................................................... 13
2.4.1 估算轴的最小直径.......................................... 13 2.4.2 确定轴的各段直径.......................................... 14 2.4.3 轴的校核.................................................. 15 2.5 轧辊轴上轴承的确定.............................................. 15 2.6 带传动的设计计算................................................ 15
2.6.1 确定计算功率.............................................. 16
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2.6.2 选择带型.................................................. 17 2.6.3 确定带轮的基准直径........................................ 17 2.6.4 确定中心距和带的基准长度.................................. 17 2.6.5 验算主动轮上的包角........................................ 18 2.6.6 确定带的根数.............................................. 18 2.6.7 确定带的预紧力............................................ 19 2.6.8 计算作用在带轮的压轴力.................................... 19 2.6.9 带轮的材料................................................ 19 2.6.10 带轮的结构形式及主要尺寸.................................. 19 2.7 减速器的设计计算................................................................................................ 20
2.7.1 减速器类型的选择.......................................... 20 2.7.2 减速器基本参数............................................ 21 2.7.3 标准斜齿圆柱齿轮的设计计算................................ 22 2.7.4 齿轮的轴的设计............................................ 25
第3章 三维建模.......................................................... 29
3.1 引言........................................................................................................................ 29 3.2 基本零件建模........................................................................................................ 29 3.3 轧制系统的装配.................................................. 31
3.3.1 轧辊轴的装配.............................................................................................. 32 3.3.2 轧制部分装配.............................................................................................. 33 3.3.3 轧制系统装配.............................................................................................. 34 3.3.4 总装配.......................................................................................................... 36
第4章 轧制系统有限元分析................................................ 37
4.1 引言........................................................................................................................ 37 4.2 轧辊轴的有限元分析............................................................................................ 37 4.3 轧辊环的有限元分析............................................................................................ 39 4.4 龙门架的有限元分析............................................................................................ 40 4.5 轧辊缺陷的种类和原因........................................................................................ 42 结论..................................................................... 43 参考文献................................................................. 44 致 谢.................................................................... 45
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4辊轧机轧制系统设计及有限元分析
摘要：本次设计的4辊轧机轧制系统是借助旋转轧辊与其接触摩擦的作用，将被轧制的金属体（轧件）拽入轧辊的缝隙间，在轧辊压力作用下，使轧件主要在厚度方向上完成塑性成型。本研究的4辊轧机工作辊直径较小,传递轧制力矩,轧延压力由轧辊承受。这种轧机的优点是相对刚度高、压下量大、轧延力小，可轧制较薄的钢带。本次设计的设计主要包括：轧辊的设计，轴系统部件的设计，电动机的选取，传动部分的设计，箱体的设计，机架的设计以及轧辊的有限元分析。设计过程按照国家标准和机械设计标准来设计的。
轧制系统的设计和轧辊的有限元分析是本次设计的重点，设计中参照了机械设计手册进行了精确的设计，并进行了强度校核。4辊轧机轧制系统结构简单、使用价格低，，主要针对将细小线材轧制成钢带而设计的。可保证加工后的产品性能良好，表面光洁度高，能够达到所需的要求。
关键词：轧制系统；轴系部件；电动机；有限元分析
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4 roller mill system design and finite
element analysis
Abstract：The design of the 4 roller rolling mill system is by means of rotating roller contact with the role, will be rolling the metal body ( workpiece ) dragged into the roll gap between the roll under pressure, mainly in the work piece thickness direction, so that the complete plastic molding. In this study of four roller mill work roll diameter smaller, pass rolling torque, rolling pressure by a roller bearing. This mill has the advantages of relatively high rigidity, compressive quantity big, rolling force, rolling thin strip.The design of the design include: the design of roller, shaft system parts of the design, the selection of motor, transmission part of the design, the box design, frame design and finite element analysis of the roll. The design process in accordance with the national standards and mechanical design criteria for design.
Rolling system design and finite element analysis of the roller is the focus of this design, the design of the mechanical design reference manual for the precise design, and carried on the intensity examination.The 4 roller mill system has the advantages of simple structure, low price, small, mainly for steel bar rolling into strip design. Can be processed to ensure good product performance, high surface smoothness, and to meet the requirements.
Key words: Rolling system; Shaft components; Motor; Finite element analysis
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