较复杂零件的计算机辅助的设计与数控铣削编程.doc

徐州工业职业技术学院 毕业设计任务书 课题名称：较复杂零件的计算机辅助设计与数控铣削编程 课题性质： 设计 系 名 称： 机械工程系 专 业： 班 级： 指导老师： 学生姓名： 一、课题名称： 较复杂零件的计算机辅助设计与数控铣削编程。 二、毕业论文（设计）主要内容： 1、用CAD软件完成零件的三维造型。 2、用数控铣床完成如图所示的零件的加工，毛坯外形尺寸为?62X37mm，材料为45钢；按图样要求制定正确的工艺方案，包括零件图工艺分析、装夹方案和工艺路线； 3、选择合理的刀具和切削工艺参数。 　　4、按图样要求完成零件节点、基点计算，设定工件坐标系，编写加工程序。 三、计划进度： 第1周：查阅资料、按图样要求用CAD软件完成零件的三维造型，制定正确的工艺方案。 第2周：查阅资料，选择合理的刀具和切削工艺参数，按图样要求完成零件节点、基点计算。 第3-5周：按图样要求设定工件坐标系，编写加工程序，完成零件的加工。 第6周：撰写毕业设计说明书。 第7周：答辩 四、毕业论文（设计）结束应提交的材料： 1、零件的PRT模型。 2、毕业设计说明书1份(10000字以上)。 　 3、技术资料： 　　（1）绘制装夹方式图。 　　（2）填写数控加工工序卡片。 　　（3）编制加工程序清单。 指导教师 　　 教研室主任 　　 　　　 年 月 日 年 月 日 目录 零件的三维造型及二维造型····························1 AUTOCAD PRO/E 工艺方案得确定······································2 2.1、分析零件图········································3 2.2、装夹方案的确定····································3 2.3、夹具的选择·········································3 2.4、加工路线的确定（加工步骤）·························5 2.5、走到方式的选择····································8 2.6、铣削方式的选用·····································8 2.7、切削液的选择······································9 刀具的选择··········································10 3.1、刀具的种类········································10 3.2、刀具的特点········································12 3.3刀具的具体选择·····································13 3.3.1、选择数控刀具通常应考虑的因素··············13 3.3.2、数控铣削刀具的选择························14 3.3.3、铣刀······································14 切削用量的选择······································15 4.1、背吃刀量的确定····································15 4.2、主轴转速的确定····································15 4.3、进给量············································16 4.4、铣削深度ap········································17 4.5、铣削宽度ac········································17 4.6、切削用量参考表····································18 编写数控程序·················