毕业设计说明书（论文）中文摘要
本课题设计建筑上的卧式钢筋切断机的工作原理是：采用电动机经一级三角带传动和二级齿轮传动减速后,带动曲轴旋转,曲轴推动连杆使滑块和动刀片在机座的滑道中作往复直线运动,使活动刀片和固定刀片相错而切断钢筋。
根据电机的工作环境选择电动机类型，采用卧式安装，防护式电机，鼠笼式三相异步电动机。选择三级减速，先是一级带减速，再两级齿轮减速。一级带传动，它具有缓冲、吸振、运行平稳、噪声小、合过载保护等优点，并安装张紧轮。两级齿轮减速，齿轮传动可用来传递空间任意两轴间的运动和动力，并具有功率范围大，传动效率高，传动比准确，使用寿命长，工作安全可靠等特点。动力由电动机输出,通过减速系统传动,把动力输入到执行机构。由于传动系统作 的是回转运动,而钢筋切断机的执行机构需要的直线往复运动,为了实现这种转换,可以采用曲柄滑块机构,盘行凸轮移动滚子从动件机构,齿轮齿条机构。本课题采用曲柄滑块机构作为本机械的执行机构 。
关键词  切断 建筑  钢筋  齿轮  曲柄滑块
毕业设计说明书（论文）外文摘要
Title  lie type steel cutting machines’designing
Abstract
This article introduces a kind of architectural lie type steel cutting machines. Its operating principles are: It use electric motors level triangle belt transmission and secondary gear transmission to slowdown. Then, it drives the crank rotate, The crank connected to slide block and moving blades in the slippery way make the back and forth straight line sport, makes the moving blades and the fixed blade shear and cut steel.
According to the working environment choice the type of electric motors, using horizontal installation, protection of the electrical, squirrel-cage three-phase asynchronous motor. Option three slowdown,
first level belt slowdown, followed by the secondary gear deceleration. First level with the introduction of automated, because it has a buffer, absorb shock and operate smoothly, small noise, and can protect the over loading. Then introduce a secondary gear deceleration slowdown, because gear transmission can be used to transmit arbitrary space between the two axis movement and momentum, and the scope of power, transmission efficient transmission accurately, long using life, such as safe and reliable character. Power output by electric motors through slow down transmission system to import power to the executive body. As the system make rotation movement, The steel cutting machine needs the back and forth straight line sport ,in order to achieve this transformation, we can use c slider-crank  institutions or gear and rack. I decided to consider realistic conditions using slider-crank as the executing machinery.
Keywords  cutting   architectural    reinforcing steel dar   gear   slider-crank
目   录
1  引言…………………………………………………………………………………… 1
1.1概述…………………………………………………………………………………………………1
1.2题目的选取……………………………………………………………………………………… 2
1.3钢筋切断机的工作原理…………………………………………………………………………2
2  电机的选择…………………………………………………………………………2
2.1 钢筋切断机需用力计算 ………………………………………………………… 2
2.2 功率计算 ………………………………………………………………………… 3
3 传动结构设计 ………………………………………………………………… 3
3.1 基本传动设计计算…………………………………………………………………… 3
3.2带传动设计……………………………………………………………………………5
3.3齿轮传动设计 ……………………………………………………………………… 6
3.4轴的校核 ……………………………………………………………………………14
3.5 键的校核…………………………………………………………………………… 22
3.6轴承的校核 ………………………………………………………………………… 23
4  钢筋切断机的摩擦 磨损和润滑 ………………………………………………… 25
结论 ………………………………………………………………………………… 27
致谢 ………………………………………………………………………………… 28
参考文献………………………………………………………………………………29