钢筋下料机设计 毕业设计.docVIP

钢筋下料机设计 摘要 哈尔滨理工大学四年的学习生活已经接近尾声，检验这四年学习成果的时候到了，毕业设计题目为“钢筋下料机设计”本次毕业设计课题来源于生活，应用广泛，但成型难度大，模具结构较为复杂，对我来说是一次挑战，相信通过这四年来的积累和沉淀，我能共圆满的完成这次设计。 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 lie type steel cutting machines designing Abstract Harbin polytechnic university four years of study and life has been close to test the learning achievement, the time of graduation design, the topic is lie type steel cutting machine’s designing the graduation design task originates from life, widely used, but the difficulty in forming, die structure is relatively complex, for me it is a challenge, believe that through the four years of accumulation and precipitation, I can have complete this design. 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