Method 1 --- Parameters参数
Bend Edges
• All edges must be from the same solid or sheet body. • They must be G1 continuous. • The faces that own the edges must be G1 continuous
参数定义 Total Width
Inset Flange(嵌入式直边折弯)
参数定义 Inset
Use Expression
Outer Tangent Line
Inner Tangent Line
Inset Flange(嵌入式直边折弯)
参数定义 Inset
Outer Mold Line
Exercise
Activity 1-1 Reviewing Preferences and Standards
P.33 ~ P.39
Activity 2-1 Flange Creation P.56 ~ P.76 Activity 2-3 Working with Miters P.107 ~ P.119
Lesson 1
Flange(直边折弯)
在实体直边上折弯
Placement Face允许是曲面，但折弯边必须是直线
Flange(直边折弯)
参数定义
常用
Flange(直边折弯)
左、右边参数 如何定义左、右边 把弯头放在上面，人由 外往里看
锥度 简单斜角缝 封闭斜角缝 对接接头
Flange(直边折弯)
• Flange • Inset Flange • General Flange 不同的材料有不同的标准，具体 来自文件ugsmd_def.std 环境变量UGII_UGSMD_STDS_LIBRARY
• Sheet Metal Hole • Sheet Metal Slot
Sheet Metal Bracket
Class Schedule
Day 1 Morning Introduction Lesson 1 Lesson 2 Flange (直边折弯) Preferences and Standards
Lesson 3
Afternoon Lesson 4
Inset Flange (嵌入式直边折弯)
Sheet Metal Bend (直接折弯)
Contour Lines 0< Bend Angle <=135
Mold Lines Bend Angle >90
Form Block Lines 0< Bend Angle <=135
Lesson 2
Preferences and Standards
Preferences and Standards
参数设置
r值是指成形材料的平均应变比或各向异性属性，r值越高，则材料受拉
变薄或受压变厚时受到的阻力越大。r值的大小影响到通用弯边特征转 换到其他状态时的形状。 打开Area Preserve（保留面积）开关项相当于给r指定了一个无穷大的 值，均匀材料的默认r值为1.0。 边缘轮廓总是沿着折弯边保持固定不变的，而外轮廓边的变形可以用 Along Section (沿截面)或Bi-direction (双向)变形选项来控制（见图519）。 Along Section (沿截面)：这个选项是按照法向垂直于控制脊线的截面来 计算变形的(注意没有选择脊线时折弯边作为默认的脊线)。此时，弯 边的底边仍垂直于控制脊线，而远边会变形。 Bi-direction (双向)：这个选项允许通用弯边在展开时弯边在三个外轮廓 边上同时变形。
Miter Phase =135
Flange(直边折弯)
左、右边参数 Miter Full (封闭斜角缝)
Flange(直边折弯)
左、右边参数 Butt Joint (对接接头) 必须大于0
Flange(直边折弯)
Reference Line 便于以后其它特征(如Hole、 Slot) 参考这些线进行定位
Sheet Metal Bend
4、Contour Line
同Flange
5、Mold Line
同Flange
Exercise
Activity 4-1 Creating Sheet Metal Bends
P.154 ~ P.159
Lesson 5 General Flange (通用折弯)
General Flange用来对曲面上 的曲边进行折弯，可生成实体 或曲面
Activity 2-2 Create a Butt Joint
P.77 ~ P.99 ---- 选做
Lesson 3 Inset Flange(嵌入式直边折弯)
与Flange相似
不同点： 1、嵌入Base Body 2、Placement Face必须是平面

Inset
Inset Flange(嵌入式直边折弯)
Exercise
Activity 2-1 Inset Flange Creation Techniques
P.131 ~ P.140 ---- 选做
Profile Flange
Profile Flange allows you to create a set of bends that attach to existing geometry and wrap around existing geometry. You will need to define a section profile (side view) using the sketcher. Once the section Profile is defined, you can also redefine/edit the default Web Profile (Top/Flat Pattern View). Width can be defined using a combination of Width, Start Offset and End Offset values. You have an option to add/edit/delete bends to the flange that are not in the plane of the Section Profile. Accomplish this by using the Multibend Bracket dialog that is accessible from the Profile Flange dialog. This feature is controlled by two sketches, i.e., one section view sketch and the other a web view or the Top/Flat Pattern view sketch. The Section Profile can be used to define the number of bends and the location of each and the Web Profile can be used to define the final shape (outline) of the solid.
左、右边参数 Taper (锥度)
Flange(直边折弯)
左、右边参数 Miter Simple (简单斜角缝)
父弯头折弯角之和
Flange1: Bend Angle=90
Miter Phase =0
Flange2: Bend Angle=45 3 2 1 Miter Phase =90
Flange3: Bend Angle=45
Lesson 22UG零件建模思路
Q&A
Introduction
钣金零件主要有两种类型: １、折弯成型零件
特点：形状比较规则，可以完全由 Sheet Metal Feature来造型。
展开：其变形主要是单向材料流动， 可以利用中性层系数来精确展开。
２、拉深成型零件
特点：形状比较复杂，有许多自由 曲面，通常用实体与曲面相结合的 方法来造型，然后通过抽壳来生成 最后零件。 展开：由于零件以塑性变形为主， 需考虑材料的机械属性，因此须用 有限元的方法才能精确展开。
Spine String
Exercise
Activity 5-1 General Flange Creation Method
P.186 ~ P.193
General Flange (通用折弯)
Method 2 --- Build to Sections构造到截面 线 • Each section must consist of an arbitrary number of curves and edges that comprise an open, G1 string. • Each section must lie in a plane that is normal to the spine. • One end of each section must touch the bend edge. The section must be tangent to the target face at this point.
Lesson 5 General Flange (通用折弯)
Lesson 6 Sheet Metal Punch (钣金冲压) Lesson 7 Sheet Metal Hole (钣金冲孔)
Lesson 8 Sheet Metal Slot (钣金冲槽)
Class Schedule
Day 2 Morning Lesson 9 Lesson 11 Sheet Metal Cutout (钣金剪切) Sheet Metal Bridge(钣金桥接) Sheet Metal Bracket(钣金支架) Lesson 10 Sheet Metal Bead (钣金筋槽)