钢筋自动折弯机的结构设计（有cad源图等）.docxVIP

本科毕业设计(论文) 题目：钢筋自动折弯机的结构设计 2013年05月 I 钢筋自动折弯机的结构设计 摘要 钢筋弯曲机是建筑工地必不可少的机械，能有效的提高生产效率，减少工人 劳动强度，提高钢筋弯曲精度。 本文所设计的钢筋弯曲机适用于弯曲φ4- φ20毫米的钢筋，其传动机构为全 封闭式，采用两级变速，工作转速满足弯曲要求，使加工效率高、加工精度高、 劳动强度小。钢筋的弯曲角度由工作盘侧面的触杆与限位开关调节，打弯钢筋后 可以自动归位，能实现弯曲角度的自动化。 本文对V 带轮和圆柱传动齿轮进行了设计计算，并对轴、键和轴承等关键 部件进行了力学分析计算和强度校核，表明该钢筋弯曲机完全符合设计要求。与 目前实际应用的各种钢筋弯曲机相比，本机操作简单，弯曲形状一致，调节方便， 性能稳定。 关键词： 钢筋弯曲机；弯曲角度；弯矩；主轴扭矩 Ⅱ Structure design of reinforced automatic bending machine Abstract Bending machine for steel bars is essential to building industry, which can effectively improve the production efficiency, reduce labor intensity and improve the accuracy of bending for the steel bars. The bending machine designed is suitable for the steel bars with various diameters from 4 to 20 millimeters, which is enclosed entirely. With two speed transmission, the bending machine has the characteristic of high efficiency, high precision and low labor intensity. The bending angle is adjusted by the bar along the working disc and the limit switch, with which the bar having been bent can return to the original position to realize the automation of bending process. Compared to the bending machines applied presently, the machine designed has some obvious advantages, such as easy operating, uniformity of bending angle, convenient adjustment and high stability. The design and calculation for the V pulley and cylindrical gear is completed, in addition, some key parts of the machine are verified, which suggests that the bending machine designed satisfy the demand of the plan. Key words: bending machine for rebar; bending angle; bending moment; twisting moment of spindle Ⅲ 目 录 1 绪 论 1 1.1综述 6 1.2折弯机的发展和研究情况 2 1.2.1折弯机的国内外发展状况 2 1.2.2折弯机发展趋势 6 1.3课题背景 7 1.4新型钢筋折弯机的特点及组成部分 7 1.5本文主要研究工作 8 2 弯矩计算及电动机选择 12 2.1 折弯方案 12 2.1.1钢筋受力情况 12 2.1.2钢筋弯曲机所需主轴扭矩及功率 12 2.2材料达到屈服极限的始弯矩 13 2.2.1按φ20螺纹钢筋公称直径计算 13 2.2.2钢筋变形硬化后的终弯矩 13 2.2.3钢筋弯曲所需距 13 2.2.4电动机功率 13 3 确定传动比及运动参数 14 3.1 分配传