【毕业设计论文】AWC机架现场扩孔机设计说明书

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毕业设计论文AWC机架现场扩孔机设计说明书

摘 要
解决攀钢热轧板厂三期技改工程（立辊轧机宽度自动控制系统（AWC））改造后，需对现有的立辊轧机机架进行扩孔，以便安装长行程伺服油缸。立辊轧机
机架扩孔如果送入设备制造厂进行加工，质量保证可靠，但机架还原难于保证安装质量、精度。为了降低技改工程费用，决定在立辊轧机现场对机架进行扩孔加工。经过潜心研究，结合现场实际情况设计专用扩孔设备--专用镗床。再结合专用设备的扩孔工艺，提出了切实可行的解决方案，该方案具有经济、实用、可行等特点。
设计的特色：解决了现巢装及镗杆的刚度问题；满足了扩较大孔的要求；
此专用设备镗刀系统采用卧式镗床的平旋盘结构，可方便调整刀具切削深度；导轨采用组合式导轨，使运动平稳，安装便捷；支撑采用组合机床型式支撑，便于拆卸安装，可大大提高生产率。

关键词 专用设备，专用镗床，加工效率，工艺实验

目 录

摘 要································ ································ ································ ································ ································ ········ I
ABSTRACT································ ································ ································ ································ ···················· III

1 绪 论································ ································ ································ ································ ································ 1
1.1 设计目的和意义································ ································ ································ ································ ······· 1
1.2 扩孔技术要求································ ································ ································ ································ ············· 1
1.3 应解决的问题································ ································ ································ ································ ············· 1
1.4 设计项目的发展情况································ ································ ································ ······························· 2
1.5设计原理································ ································ ································ ································ ······················· 2
2 总体设计································ ································ ································ ································ ························ 3
2.1 总体设计原则································ ································ ································ ································ ············· 3
2.2 工艺分析································ ································ ································ ································ ······················ 3
2.3 总体方案的比较································ ································ ································ ································ ········ 3
2.3.1 刀杆的安装形式································ ································ ································ ································ 3
2.3.2 进给方式································ ································ ································ ································ ·············· 4
2.3.3 升降运动形式································ ································ ································ ································ ···· 4
2.3.4 机床运动的分配································ ································ ································ ································ 4
2.3.5 选择传动形式和支撑形式································ ································ ································ ············· 4
3 力能参数计算································ ································ ································ ································ ············· 6
3.1 镗削用量的选择及转矩、功率的确定原则································ ································ ····················· 6
3.2 最佳切削用量的选择································ ································ ································ ······························· 6
3.2.1 现有镗孔工艺参数································ ································ ································ ··························· 6
3.2.2 镗削切削速度、扭矩和切削功率公式································ ································ ······················ 7
3.2.3 主要镗削参数的计算································ ································ ································ ······················ 7
3.3 选择电机································ ································ ································ ································ ······················ 9
4 扩孔机传动系统设计································ ································ ································ ··························· 10
4.1 确定总传动比································ ································ ································ ································ ··········· 10
4.2 分配传动装置的传动比································ ································ ································ ························ 10
4.3 计算总的机械效率································ ································ ································ ································ ·11
4.4 计算传动装置各轴的运动和动力参数································ ································ ···························· 11
4.5 带传动设计································ ································ ································ ································ ··············· 12

4.6 传动斜齿轮的设计计算································ ································ ································ ························ 14
4.6.1 选定齿轮类型、精度等级、材料及齿数································ ··························· 14
4.6.2 按齿面接触强度设计································ ································ ······················· 14
4.6.4 几何尺寸计算································ ································ ································ ·· 17
4.6.5 计算Ⅰ－Ⅱ轴间圆柱斜齿轮································ ································ ············· 18
4.6.6 齿轮的结构设计································ ································ ······························ 18
4.7 轴的结构设计································ ································ ································ ································ ··········· 18
4.7.1 轴设计的主要内容································ ································ ································ ························· 18
4.7.2 轴的材料································ ································ ································ ································ ············ 19
4.7.3 轴的设计计算································ ································ ································ ································ ·· 19
4.7.4 按扭转强度初步估算轴径································ ································ ································ ··········· 19
4.7.5 轴的机构设计································ ································ ································ ································ ·· 20
4.7.6求轴上的载荷································ ································ ································ ································ ··· 21
4.7.7按弯扭合成应力校核的轴的强度································ ································ ······························ 22
4.7.8 精确校核轴的疲劳强度································ ································ ································ ················ 23
4.7.9 对轴Ⅱ进行设计································ ································ ································ ······························ 25
4.8 对所有选用键进行强度校核································ ································ ································ ··············· 30
4.9 对承受较大载荷的圆锥滚子轴承进行校核································ ································ ··················· 31
4.10 镗刀系统设计································ ································ ································ ································ ········ 33
4.10.1镗刀头································ ································ ································ ································ ··············· 33
4.10.2 镗杆选择································ ································ ································ ································ ········· 33
4.11 箱体的结构设计································ ································ ································ ································ ···· 34
5 导轨设计································ ································ ································ ································ ····················· 36
6 镗刀强度及镗杆的稳定性验算································ ································ ································ ····· 38
7 工艺试验································ ································ ································ ································ ····················· 42
结 论································ ································ ································ ································ ································ ·· 43
参 考 文 献································ ································ ································ ································ ····················· 44
附录A: E1立辊轧机机架加工工序图································ ································ ····························· 45
附录B: E2立辊轧机机架加工工序图································ ································ ····························· 46
致 谢································ ································ ································ ································ ································ 47