分离式最大加工直径为 320mm普通车床主轴变速箱设计毕业论文.doc

1金属切削机床课程设计任务书（四）（设计时间：2周）题目：最大加工直径为320mm普通车床主轴变速箱设计给出条件：Z=18级（采用分离传动）。任务：二位同学合作进行。1、参数拟定：确定maxn、minn，公比，主电动机功率P。2、运动设计：列出结构式，绘出结构网、转速网、传动系统图，计算各传动副的传动比及齿轮的齿数。3、强度计算和结构草图设计：估算齿轮模数m和轴径d，选择和计算正反向离合器、制动器，绘制出结构草图。在结构草图的基础上，对一根轴进行强度验算（学生A），或对主轴进行刚度验算（学生B）和该轴系的轴承寿命进行验算。4、主轴变速箱装配设计：在结构草图的基础上，用计算机绘出变速箱展开图一张（0A）（学生A），或主轴箱展开图一张（0A）（学生B），并标注尺寸和配合。5、编写设计计算说明书一份（2030页，全部用计算机打印出）。内容应包括参数、运动设计的分析和拟定，轴和轴承的验算，此外，还应对重要结构的选择和分析做必要的说明。2目录第1章参数的确定·······················11.1车床的规格系列和类型···················11.2参数确定·························11.2.1极限切削速度Umax,Umin················11.2.2主轴的极限转速····················21.2.3主轴的转速极数z和公比···············21.2.4电机功率-动力参数的确定················3第2章传动设计························42.1传动结构式、结构网的选择·················42.2传动组顺序的安排·····················42.2.1传动系统扩大顺序的安排················52.2.2传动组变速范围的极限值················52.2.3最后扩大传动组的选择·················5第3章转速图的拟定······················63.1轴的转速························63.2中间传动轴的转速·····················63.3齿轮传动比的限制·····················7第4章带轮直径和齿轮齿数的确定···············94.1确定齿轮齿数·······················94.2带轮直径的确定······················11第5章传动件的估算·····················145.1传动轴的估算·······················155.2齿轮模数的估算······················17第6章展开图设计·······················186.1结构设计·························196.1.1设计的内容······················1936.1.2技术要求·······················196.1.3设计方法·······················206.2轴（输入轴）的设计···················206.3齿轮块的设计·······················216.3.1齿轮块特点······················216.3.2精度等级的选择····················216.3.3结构与加工方法的关系·················216.3.4组合齿轮·······················226.3.5齿轮的轴向定位····················236.4传动轴设计························236.4.1轴的结构·······················236.4.2轴承的选择······················246.4.3轴的轴向定位·····················246.5主轴组件设计·······················24第7章主要传动部件的校核···················277.1对轴承的校核·······················277.2对轴的校核························287.2.1轴的强度校核·····················287.2.2轴的刚度校核·····················297.2.3齿轮模数的校核····················30第8章截面图设计·······················318.1截面图的内容·······················318.2轴的空间布置·······················31鸣谢······························33参考文献····························344摘要机械制造业在整个国民经济中占有重要的地位，而作为工作母机的机床是它的一个重要的成部分，这是因为几穿担负机械制造业总工作量的40%60%，机床的质量和技术水平直接影响机械产品的质量和可进行经济加工的使用范围。为了设计和制造质量好、效率高、重量轻、体积小、结构简单、使用方便的机床，提出如下的基本要求：一、工艺范围二、生产率和自动化程度三、加工精度和表面粗糙度四、可靠性五、机床的效率和寿命六、系列化、通用化、标准化程度关键词:切削机床；机构；可靠性；标准化等。第1章参数的确定1.1车床的规格系列和类型普通机床的规格和类型有系列型谱作为设计时应该遵照的基础。因此，对这些基本知识和资料作些简要介绍。本次设计的是普通型车床主轴变速箱。车床的主参数（规格尺寸）和基本参数（GB1582-79，JB/Z143-79）最大的工件回转直径D（mm）是320；刀架上最大工件回转直径D1大于或等于160；主轴通孔直径d要大于或等于36；主轴头号（JB2521-79）是4.5；最大工件长度L是5001000；主轴转速范围是：31.51600；级数范围是：18；纵向进给量0.032mm/r；主电机功率是34kw。