数控技术落料凹模零件加工工艺编制和工装设计.doc

长沙航空职业技术学院 毕业设计（论文） 题 目 落料凹模零件的加工 工艺编制和工装设计 系 机械制造工程系 专 业 数控技术 班 级 数技0801 姓 名 指导教师 2010 年 12 月 23 日 目 录 摘要································································1 ABSTRACT·························································2 第一章 绪论························································3 第二章 零件的建模··················································5 2.1 建模前的准备···············································5 2.1.1 UG NX 3.0的安装方法简介·····························5 　　 2.1.2 UG NX 3.0操作界面简介·······························5 2.2 零件的建模·················································6 第三章 零件的工艺设计·············································16 3.1 零件的分析················································16 3.1.1 零件图·············································16 3.1.2 零件工艺分析的意义·································16 3.1.3 零件工艺分析·······································17 3.2 制定工艺过程··············································18 3.3 确定装夹方案··············································19 3.4 划分加工工步和安排加工顺序································19 3.5 选择刀具··················································21 3.5.1 铣刀类型的选择·····································21 3.5.2 铣刀参数的选择·····································21 3.6 切削用量的选择············································22 3.6.1 进给速度F的确定···································23 3.6.2 铣削速度Vc的确定··································24 3.6.3 主轴转速n的确定···································25 第四章 零件的CAM加工·············································26 4.1 毛坯及工件坐标系的建立····································26 4.2 刀具的建立················································27 4.3 LLAM的零件加工···········································28 第五章 第20号工序夹具设计说明书··································31 5.1 机床夹具简介··············································31 5.2 准备阶段········································