CATIA V5R20曲面设计教程（修订版）.pdf

88 4.3 草图约束 ··································· 91 4.3.1 几何约束 ································ 91 4.3.2 尺寸约束 ································ 95 4.4 草图参数设置 ··························· 98 4.4.1 草图样式设置 ························· 99 4.4.2 会话设置 ································ 99 4.5 摇臂草图绘制范例 ·················· 100 第 5 章 扫描特征 ······························ 107 5.1 拉伸体 ···································· 107 5.1.1 沿指定的方向和距离拉伸 ······· 107 5.1.2 通过修剪至面/平面创建拉 伸体 ···································· 109 5.2 旋转体 ···································· 110 5.2.1 根据指定的轴线和角度创建 旋转体 ·································· 111 5.2.2 通过修剪至面创建旋转体 ········ 111 5.2.3 在两个面之间创建旋转体 ······· 112 5.3 沿引导线扫掠 ························· 113 5.4 管道 ········································ 114 5.5 扫描特征范例解析 ·················· 114 5.5.1 弯管创建范例 ······················· 114 5.5.2 箱体创建范例 ······················· 117 5.5.3 手轮创建范例 ······················· 119 第 6 章 特征操作与编辑 ·················· 123 6.1 边缘操作 ································· 123 6.1.1 边倒圆 ································· 123 6.1.2 倒斜角 ································· 125 6.2 面操作 ···································· 126 6.2.1 拔模 ···································· 126 6.2.2 抽壳 ···································· 129 6.2.3 偏置面 ································· 131 6.3 阵列特征 ································· 133 6.3.1 线性阵列特征 ······················· 133 6.3.2 圆形阵列特征 ······················· 135 6.4 镜像几何体或特征 ·················· 136 6.4.1 镜像几何体 ··························· 136 6.4.2 镜像特征 ······························ 136 6.5 修剪操作 ································· 137 6.5.1 修剪体 ································· 137 6.5.2 分割面 ································· 138 6.6 特殊操作 ································· 139 6.6.1 螺纹 ···································· 139 6.6.2 比例体 ································· 141 6.7 特征编辑 ································· 142 6.7.1 部件导航器 ··························· 142 6.7.2 编辑特征参数 ······················· 143 6.7.3 编辑位置 ······························ 145 6.7.4 移动特征 ······························ 146 6.7.5 抑制特征 ······························ 147 6.7.6 取消抑制特征 ······················· 148 6.8 表达式及其应用 ····················· 148 6.8.1 表达式的基本概念 ················· 148 6.8.2 表达式对话框 ······················· 150 6.9 特征操作与编辑范例解析 ······ 151 6.9.1 端盖创建范例 ······················· 151 6.9.2 阀体创建范例 ······················· 154 6.9.3 端盖特征编辑范例 ················· 160 第 7 章 实体建模综合范例解析 ······· 162 7.1 特征建模综合应用 ·················· 162 7.1.1 支架创建范例 ······················· 162 7.1.2 涡轮减速器箱体创建范例 ······· 167 7.1.3 阀体创建范例 ······················· 175 7.1.4 机盖创建范例 ······················· 183 7.2 表达式建模综合应用 ·············· 191 7.2.1 渐开线圆柱齿轮创建范例 ······· 191 7.2.2 条件表达式应用范例 ·············· 196 第 8 章 装配 ····································· 199 8.1 装配模块概述 ························· 199 8.1.1 UG NX 装配的概念及常用 术语 ···································· 200 8.1.2 UG NX 装配的主要特点 ········· 201 8.2 创建装配模型 ························· 201 8.2.1 添加已存在组件 ···················· 201 8.2.2 配对组件 ······························ 202 VII 8.2.3 引用集 ································· 204 8.3 组件阵列 ································· 205 8.3.1 以阵列特征为参考阵列组件 ···· 206 8.3.2 线性阵列 ······························ 206 8.3.3 圆周阵列 ······························ 207 8.4 装配导航器 ····························· 207 8.5 装配爆炸图 ····························· 208 8.5.1 创建爆炸图 ··························· 208 8.5.2 编辑爆炸图 ··························· 209 8.5.3 自动爆炸组件 ······················· 209 8.5.4 取消爆炸组件 ······················· 210 8.5.5 删除爆炸图 ··························· 210 8.5.6 隐藏和显示爆炸图 ················· 210 8.6 装配范例解析 ························· 211 8.6.1 球阀装配建模范例 ················· 211 8.6.2 球阀装配爆炸图创建范例 ······· 219 第 9 章 高级参数化建模技术 ··········· 222 9.1 部件间关联表达式 ·················· 222 9.1.1 部件间关联表达式的创建 ······· 222 9.1.2 部件间表达式的编辑 ·············&#