Sheet Metal DesignyanyifeiDay 1MorningIntroductionLesson 1 Flange (直边折弯)Lesson 2 Preferences and Standards Lesson 3 Inset Flange (嵌入式直边折弯) AfternoonLesson 4 Sheet Metal Bend (直接折弯)Lesson 5General Flange (通用折弯)Lesson 6Sheet Metal Punch (钣金冲压) Lesson 7Sheet Metal Hole (钣金冲孔) Lesson 8Sheet Metal Slot (钣金冲槽)Day 2MorningLesson 9 Sheet Metal Cutout (钣金剪切)Lesson 10 Sheet Metal Bead (钣金筋槽)Lesson 11 Sheet Metal Bridge(钣金桥接)AfternoonLesson 12 Sheet Metal Bracket(钣金支架)Lesson 13Multibend Bracket (多次折弯钣金支架) V18 Lesson 14Sheet Metal Routed ReliefLesson 15Sheet Metal Corner(钣金拐角)Lesson 16 Sheet Metal StrainLesson 17 Part in Process (钣金零件加工过程)Day 3MorningLesson 18 Flat Pattern(二维展开)Lesson 19 MetaForm (有限元法展开)V18AfternoonLesson 20General Pocket/General Pad(通用槽腔/凸台) Lesson 21拉深成型零件建模方法Lesson 22UG零件建模思路Q & AIntroduction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。
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参数定义常用如何定义左、右边 把弯头放在上面，人由外往里看左、右边参数锥度简单斜角缝封闭斜角缝对接接头左、右边参数 Taper (锥度)左、右边参数 Miter Simple (简单斜角缝)父弯头折弯角之和123Flange1: Bend Angle=90Miter Phase =0Flange2: Bend Angle=45Miter Phase =90Flange3: Bend Angle=45Miter Phase =135左、右边参数 Miter Full (封闭斜角缝)左、右边参数 Butt Joint (对接接头)必须大于0ReferenceLineContour Lines0< Bend Angle <=135Mold LinesBend Angle >90Form Block Lines0< Bend Angle <=135便于以后其它特征(如Hole、Slot) 参考这些线进行定位Lesson 2 Preferences and Standards•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 SlotSheet Metal Bracket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•BridgeNote: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。
ExerciseActivity 1-1 Reviewing Preferences and StandardsP.33 ~ P.39Activity 2-1 Flange CreationP.56 ~ P.76Activity 2-3 Working with MitersP.107 ~ P.119Activity 2-2 Create a Butt JointP.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 Body2、Placement Face必须是平面Inset参数定义 Total Width参数定义 InsetUse Expression Outer Tangent LineInner Tangent Line参数定义 Inset•当Bend Angle <=90，同Out Mold Line•当Bend Angle > 90，保持不变Outer Mold LineDIN Mold LineInner Mold Line参数定义Inset参数定义 Bend ReliefExerciseActivity 2-1 Inset Flange Creation TechniquesP.131 ~ P.140----选做Profile FlangeProfile 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.Lesson 4 Sheet Metal Bend二维线框展开图三维实体零件1、Bend CenterlineCurve 把弯头一分为二(等面积)2、Bend AxisCurve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4、Contour Line同Flange5、Mold Line同FlangeExerciseActivity 4-1 Creating Sheet Metal BendsP.154 ~ P.159Lesson 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4种生成方式：Parameters Built to SectionsBuilt to Faces Punch VectorMethod 1 ---Parameters 参数所有的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GeneralFlange Feature里可连续定义12步折弯•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 Bend EdgesSpine StringExerciseActivity 5-1 General Flange Creation MethodP.186 ~ P.193Method 2 ---Build to Sections构造到截面线•Each section must consist of anarbitrary number of curves and edgesthat comprise an open, G1 string.•Each section must lie in a plane thatis normal to the spine.•One end of each section must touchthe bend edge. The section must betangent to the target face at this point.Method 3 ---Build to Faces构造到面ExerciseActivity 5-2 Other General Flange Creation MethodP.194~ P.202General Flange (通用折弯) Method 4 ---Punch Vector冲压矢量参数设置▪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。