本书以 UG NX 12.0为基础，重点介绍了使用 UG NX 软件进行机械零件设计及产品造型的方法、步骤和技巧。全书主要内容包括 UG NX12.0简介与基础操作、UG NX 草图设计、3D 曲线设计、基准与实体建模、细节特征与工程特征、曲面设计、特征操作与同步建模、零件装配设计、工程图设计等。 本书内容丰富，选材恰当，对于重要的工具在讲解时都配有量身定制的案例，便于读者加深理解；每单元的最后都有综合应用实例，单元后还有一定量的精选习题供读者练习。另外，本书配套有丰富的素材文件和教学视频，读者可在华信教育资源网（www.hxedu.com.cn）下载。

UG NX 是 Siemens PLM Software 公司出品的一款集设计、仿真、制造等于一体的集成软 件，它为用户的产品设计及加工过程提供了数字化造型和验证手段。UG NX 针对用户的虚拟产 品设计和工艺设计的需求，提供了经过实践验证的解决方案。UG NX 包括了功能较为全面的产 品设计应用模块。UG NX 具有高性能的机械设计和制图功能，为制造设计提供了灵活性，满足 了客户设计复杂产品的需要。同时 UG NX 也是一个优秀的交互式 CAD/CAM（计算机辅助设 计与计算机辅助制造）系统，它功能强大，可以轻松实现各种复杂实体及造型的建构。它在诞 生之初主要基于工作站，但随着 PC 硬件的发展和个人用户的迅速增长，在 PC 上的应用取得了 迅猛的增长，已经成为产品设计、模具设计的一个主流工具，广泛应用于机械、电子、化工、 航空、建材等行业。 应用 CAD 技术可以提高企业的设计效率和设计质量，优化设计方案，缩短设计周期，从而 加强企业的核心竞争力。现代企业已经把 CAD 技术当成工程技术人员必须具备的一项基本技 能，为满足社会对这方面人才的需求，各高等院校相继开设了计算机辅助设计课程。 本书以 UG NX12.0 为蓝本，从介绍命令入手由浅入深介绍了 UG NX 的基本知识及进阶应 用，包括 UG NX12.0 简介与基础操作、UG NX 草图设计、3D 曲线设计、基准与实体建模、细 节特征与工程特征、曲面设计、特征操作与同步建模、零件装配设计、工程图设计共九个单元； 为避免出现学习命令时老师难讲学生难学的情况，本书将部分实例融入到命令的讲解之中，让 学生边学边练，加强对每个命令的理解与记忆。 本书由顺德职业技术学院朱慕洁老师担任主编；其中第一、七、八、九章由朱慕洁老师编 写，第二、三、四、五、六章分别由副主编杨亘老师、畅国帏老师、柯美元老师、许中明老师、 吴裕农老师编写。 说明：为了保证读者学习时书中内容同软件界面显示的一致性，本书中的零件图形统一由 UG NX 绘制并直接从界面截取而获得，图形绘制标准为 UG NX 系统标准，读者应注意该标准 与国家制图标准的区别。同时，本书配套教学资源包中除包含了教学过程中需要用到的素材文 件，还包含了精彩的教学视屏。 本书在编写过程中得到了电子工业出版社及兄弟院校的大力支持与协助，在此我表示衷心 的感谢；由于编者编写水平有限，存在疏漏和不足在所难免，恳请同行及广大读者批评指正。

单元 1 UG NX12.0 简介与基础操作 ······················································1 1.1 UG NX12.0 简介··················································································.1 1.2 UG NX12.0 主界面 ··············································································.1 1.2.1 初始界面··················································································.1 1.2.2 工作界面··················································································.3 单元 2 UG NX 草图设计 ·····································································5 2.1 UG NX 草图简介················································································.5 2.2 任务环境草图·····················································································.5 2.2.1 设置草图平面············································································.5 2.2.2 草图设置··················································································.9 2.2.3 基本图元绘图工具······································································.9 2.2.4 高级草图工具···········································································.14 2.2.5 曲线编辑·················································································.21 2.2.6 几何约束·················································································.23 2.2.7 尺寸标注·················································································.25 2.2.8 草图综合知识···········································································.28 2.3 草图综合范例····················································································.29 综合练习 2·······························································································.34 单元 3 3D 曲线设计········································································.36 3.1 3D 曲线简介······················································································.36 3.2 基本曲线命令····················································································.36 3.2.1 直线·······················································································.36 3.2.2 圆弧/圆···················································································.37 3.2.3 艺术样条·················································································.38 3.2.4 抛物线····················································································.39 3.2.5 双曲线····················································································.39 3.2.6 一般二次曲线···········································································.40 3.2.7 螺旋线····················································································.41 3.2.8 曲面上的曲线···········································································.44 3.2.9 文本·······················································································.44 3.3 高级曲线命令····················································································.47 3.3.1 偏置曲线·················································································.47 3.3.2 偏置 3D 曲线············································································.49 3.3.3 在面上偏置曲线········································································.49 3.3.4 投影曲线·················································································.51 3.3.5 组合投影·················································································.52 3.3.6 镜像曲线·················································································.53 3.3.7 相交曲线·················································································.54 3.3.8 等参数曲线··············································································.54 3.3.9 等斜度曲线··············································································.55 3.3.10 复合曲线 ···············································································.56 3.3.11 截面曲线 ···············································································.57 3.3.12 抽取虚拟曲线 ·········································································.58 3.3.13 桥接曲线 ···············································································.59 3.3.14 修剪曲线 ···············································································.60 3.3.15 分割曲线 ···············································································.61 3.3.16 调整曲线长度 ·········································································.62 3.4 曲线综合应用范例··············································································.63 单元 4 基准与实体建模 ···································································.69 4.1 基准特征··························································································.69 4.1.1 坐标系····················································································.69 4.1.2 基准点····················································································.70 4.1.3 基准轴····················································································.70 4.1.4 基准平面·················································································.71 4.2 拉伸与旋转·······················································································.71 4.2.1 拉伸·······················································································.71 4.2.2 旋转·······················································································.73 4.2.3 拉伸与旋转综合应用实例····························································.74 4.2.4 拉伸与旋转综合练习·············································错误!未定义书签。 4.3 扫掠实体与通过曲线组创建实体····························································.82 4.3.1 扫掠·······················································································.82 4.3.2 沿引导线扫掠···········································································.84 4.3.3 变化扫掠·················································································.85 4.3.4 管道扫掠·················································································.87 4.3.5 通过曲线组··············································································.88 4.3.6 扫掠与混合综合应用实例····························································.89 4.3.7 扫掠与混合综合练习································································.103 单元 5 细节特征与工程特征 ···························································.108 5.1 圆角······························································································.108 5.1.1 边倒圆··················································································.108 5.1.2 面倒圆 ·····················································································113 5.1.3 倒圆拐角·················································································117 5.2 倒斜角·····························································································119 5.3 拨模特征··························································································119 5.3.1 拨模·······················································································119 5.3.2 拨模体··················································································.123 5.4 孔工具···························································································.125 5.5 槽工具···························································································.130 5.6 筋板工具························································································.131 5.7 壳工具···························································································.133 5.8 加厚工具························································································.135 5.9 细节特征与工程特征应用实例·····························································.136 5.10 细节特征与工程特征练习 ·································································.145 单元 6 曲面设计 ··········································································.149 6.1 一般曲面························································································.149 6.1.1 四点曲面···············································································.149 6.1.2 通过点曲面············································································.149 6.1.3 从极点曲面············································································.150 6.1.4 拟合曲面···············································································.151 6.1.5 过渡曲面···············································································.153 6.1.6 有界平面···············································································.154 6.1.7 填充曲面···············································································.154 6.1.8 条带曲面···············································································.154 6.1.9 中面·····················································································.155 6.2 网格曲面························································································.156 6.2.1 通过曲线组············································································.156 6.2.2 通过曲线网格·········································································.157 6.2.3 艺术曲面···············································································.158 6.2.4 N 边曲面 ··············································································.158 6.3 扫掠曲面························································································.160 6.3.1 扫掠·····················································································.160 6.3.2 样式扫掠···············································································.160 6.3.3 截面·····················································································.161 6.3.4 变化扫掠···············································································.163 6.3.5 沿引导线扫掠·········································································.163 6.4 曲面操作························································································.163 6.4.1 曲面复制···············································································.163 6.4.2 曲面修剪···············································································.163 6.4.3 曲面延伸···············································································.164 6.4.4 修剪和延伸············································································.165 6.4.5 规律延伸···············································································.166 6.4.6 偏置曲面···············································································.167 6.4.7 偏置面··················································································.168 6.4.8 变距偏置面············································································.169 6.4.9 凸起·····················································································.170 6.5 曲面合并························································································.171 6.5.1 缝合·····················································································.171 6.5.2 组合·····················································································.172 6.6 构造实体························································································.173 6.7 分割面···························································································.173 6.8 曲面设计综合应用实例······································································.174 单元 7 特征操作与同步建模 ···························································.193 7.1 阵列······························································································.193 7.1.1 阵列特征···············································································.193 7.1.2 阵列面··················································································.197 7.1.3 阵列几何特征·········································································.198 7.2 镜像······························································································.198 7.2.1 镜像特征···············································································.198 7.2.2 镜像面··················································································.199 7.2.3 镜像几何体············································································.200 7.3 同步建模························································································.200 7.3.1 移动面··················································································.200 7.3.2 拉出面··················································································.203 7.3.3 偏置区域···············································································.203 7.3.4 替换面··················································································.204 7.3.5 删除面··················································································.205 7.3.6 重用·····················································································.206 7.3.7 相关·····················································································.206 7.3.8 尺寸·····················································································.206 7.3.9 优化·····················································································.207 7.3.10 边 ······················································································.207 7.4 体处理···························································································.208 7.4.1 修剪体··················································································.208 7.4.2 拆分体和删除体······································································.208 7.5 编辑特征························································································.209 7.5.1 特征的插入、重新排序、隐藏与显示、抑制与取消抑制 ··················.209 7.5.2 移除参数·················································································211 7.6 布尔运算··························································································211 7.6.1 合并·······················································································211 7.6.2 求差·······················································································211 7.6.3 相交·····················································································.212 7.7 特征操作与同步建模综合应用实例·······················································.212 7.8 特征操作与同步建模综合练习·····························································.227 单元 8 零件装配设计 ····································································.229 8.1 新建装配文件··················································································.229 8.2 引用集···························································································.229 8.3 装配约束························································································.230 8.4 装配导航器·····················································································.232 8.5 装配基本操作··················································································.233 8.6 爆炸图···························································································.237 8.6.1 创建爆炸图············································································.237 8.6.2 删除爆炸图············································································.238 8.7 显示自由度·····················································································.238 8.8 自顶向下的装配设计·········································································.239 8.8.1 新建层··················································································.239 8.8.2 产品接口与 WAVE 接口链接器···················································.240 8.8.3 WAVE 几何链接器···································································.241 8.9 零件装配设计综合应用实例································································.242 8.10 零件装配设计综合练习 ····································································.257 单元 9 工程图设计 ·······································································.260 9.1 工程图的基本操作············································································.260 9.2 插入视图························································································.263 9.2.1 基本视图···············································································.263 9.2.2 投影视图···············································································.266 9.2.3 局部放大图············································································.267 9.2.4 断开视图···············································································.268 9.2.5 剖视图··················································································.269 9.2.6 展开的点与角度剖视图·····························································.274 9.2.7 轴侧剖视图············································································.275 9.2.8 半轴侧剖视图·········································································.277 9.2.9 局部剖视图············································································.278 9.3 编辑视图························································································.279 9.3.1 修改视图···············································································.279 9.3.2 移动/复制视图········································································.280 9.3.3 视图对齐···············································································.281 9.3.4 视图边界···············································································.281 9.3.5 更新视图···············································································.283 9.3.6 隐藏视图中的组件···································································.284 9.3.7 显示视图中的组件···································································.284 9.3.8 视图相关编辑·········································································.284 9.4 图样标注························································································.287 9.4.1 尺寸标注···············································································.287 9.4.2 创建文本注释·········································································.294 9.4.3 基准的创建与形位公差的标注····················································.296 9.4.4 表面粗糙度的标注···································································.298 9.4.5 中心线··················································································.299 9.5 工程图设计综合应用实例···································································.301 9.6 工程图设计综合练习·········································································.305