超详细的UG钣金设计教程 (1)

Inset Flange (嵌入式直边折弯)
Sheet Metal Bend (直接折弯)
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)
• 当Bend Angle <=90， 同Out Mold Line • 当Bend Angle > 90， 保持不变
DIN Mold Line
Inset Flange(嵌入式直边折弯)
参数定义 Inset
Inner Mold Line
Inset Flange(嵌入式直边折弯)
参数定义 Bend Relief
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
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.
General Flange (通用折弯)
4种生成方式：
Parameters
Built to Sections
Built to Faces
Punch Vector
General Flange (通用折弯)
所有的Plus、Bends、Webs都由参数定义，它 们可以是常量，也可以是变量，在一个General Flange Feature里可连续定义12步折弯
• 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
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
Afternoon
Lesson 12 Lesson 13Multibend Bracket (多次折弯钣金支架) V18
Lesson 14Sheet Metal Routed Relief
Lesson 15Sheet Metal Corner(钣金拐角) Lesson 16 Sheet Metal Strain
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)
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)
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.
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
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
wenku.baidu.com
Inner Tangent Line
Inset Flange(嵌入式直边折弯)
参数定义 Inset
Outer Mold Line
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
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
General Flange (通用折弯)
Method 3 --- Build to Faces构造到面
Exercise
Activity 5-2 Other General Flange Creation Method
P.194~ P.202
General Flange (通用折弯)
Method 4 --- Punch Vector冲压矢量
Sheet Metal Design
yanyifei
Class Schedule
Day 1 Morning Introduction Lesson 1 Lesson 2 Flange (直边折弯) Preferences and Standards
Lesson 3
Afternoon Lesson 4
Lesson 4 Sheet Metal Bend
二维线框展开图
三维实体零件
Sheet Metal Bend
1、Bend Centerline
Curve 把弯头一分为二(等面积)
2、Bend Axis
Curve不能在Face上，两者之间的 距离确定半径
3、Bend Tangent Line
弯头完全在Curve的一侧
Preferences and Standards
作用：为整个零件设置全局参数 使用范围(成型钣金特征)：
• Flange • Inset Flange • General Flange • Bend • Bridge
Note:
当修改Global Parameters以后， 那些引用Global Parameters的 特征都会自动更新。这点与其它 的Preferences是不同的。
Lesson 17 Part in Process (钣金零件加工过程)
Class Schedule
Day 3 Morning Lesson 18 Lesson 19 Flat Pattern(二维展开) MetaForm (有限元法展开) V18
Afternoon
Lesson 20General Pocket/General Pad(通用槽腔/凸台) Lesson 21拉深成型零件建模方法
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
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 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。