Class Schedule,Day 1 Morning Introduction Lesson 1 Flange (直边折弯) Lesson 2 Preferences and Standards Lesson 3 Inset Flange (嵌入式直边折弯) Afternoon Lesson 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 2 Morning Lesson 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) Afternoon Lesson 12 Sheet Metal Bracket(钣金支架) 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 17 Part in Process (钣金零件加工过程),Class Schedule,Day 3 Morning Lesson 18 Flat Pattern(二维展开) Lesson 19 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 Lesson 22UG零件建模思路 Q 它们可以是参数化模型，也可以是非参数化模型。二维展开线与三维钣金零件保持单向相关。,Flat Pattern (二维展开),当第一次进入Flat Pattern菜单时，系统提示应选择starting face，一旦选择了starting face，系统就会自动地在材料的同侧选中所有face，这时就可以开始生成展开图。 如果零件是sheet body，那么材料的厚度就被设置为0，而且Flat Pattern菜单中的BAF也不起作用。 如果零件由sheet metal feature生成，BAF用特征自己的，如果零件不是由sheet metal feature生成， BAF用Flat Pattern菜单里的设置。,Name and Layer 二维展开图为一个Group。可用Preferences来设置着二项参数 Traverse Body 当前零件已存在Flat Pattern时，它才起作用。当Auto Update被关闭，而且 零件已被修改，此时Traverse Body可以自动找到那些新增加的face。 Form/Unform Sheet Metal Feature 只有处于Form/Unform状态，才能生产精确的Flat Pattern。如果零件包含有 General Flange Feature，最好先Unform，然后再生成Flat Pattern。 Change Body 当一个Part文件中有超过二个Body时，需用到此命令。 Bend Allowance Formula 当零件不是由sheet metal feature生成时，用此设置BAF。 Location Start Position：展开图置于过Start Point且与Start Face相切的平面 WCS：展开图置于WCS的XY平面，且Start Point与原点重合,Flat Pattern (二维展开),Flat Pattern (二维展开),Traverse Control Algorithm Sheet Metal - Select the Sheet Metal traversal algorithm for parts that reflect a formable manufacturing process, and typically exhibit a uniform thickness. The algorithm identifies pairs of faces that are separated by a uniform thickness. Generic - When flat representations are required for parts where the concept of thickness does not apply, better results are obtained with the Generic algorithm Woven Material(编织材料) - Use this option when you want to flatten a part made of woven materials such as composites. With this option only the selected start face is flattened. Addition faces cannot be selected. You may select additional curves and/or points to project to the flat pattern in Layout Options. None - Select None when you want to flatten only the start face or a subset of faces of the body. You may then select additional faces to flatten in Layout Options. You must insure that the additional faces you select are connected somehow to the start face. Setting the Traversal Control to None will also prevent traversal of the part during automatic update.,Flat Pattern (二维展开),Layout Options,Flat Pattern (二维展开),Area Preserving Faces - Most of the faces in the flat pattern are of this type. Distortion Faces - You may not want some faces to be flattened as area-preserving. Instead the face may need to distort when formed, and not preserve its area. A case where you may want a distortion face, is when the face must stretch, compress, or buckle when the part is formed.,Face 7,8,9 - Starting Face Face 2,5 - Distortion Face,Face 1,2,3 - Starting Face Face 5,8 - Distortion Face,Layout Options,Projection Faces - This solver is used to project its assigned face onto the flat pattern plane without distorting adjacent faces. Bead faces are examples of projection-typed faces.,Layout Options,Flat Pattern (二维展开),Cutting Edges - In some cases, adjacent faces in the body are not intended to be adjacent in the flat pattern. To separate the faces, you may select edges where the flat pattern is to be cut.,Flat Pattern (二维展开),Layout Options,Additional Curves - In addition to the normal curves that are created for the flat pattern, you may select additional curves, edges, or points to appear in the flat pattern. The objects that are selected are projected to the body if necessary and flattened. The resulting curve or point then appears in the flat pattern at the location where the faces were flattened. Show Features - This option, when selected, will highlight all sheet metal features identified during part traversal of the part. Start Position - If the Location is set to Start Position, the flat pattern is created at the starting position. If the Location is set to WCS the starting position is mapped to the origin of the WCS. Orientation Vector -,Flat Pattern (二维展开) - Woven Materials,针对复杂的曲面，如果需要精确展开，必须考虑材料流动，因此须用有限元的方法。但Woven Materials(编织材料)的原理可用来比较精确地展开复杂曲面，而且使用方便，效率高。,Exercise,Activity 14-2 Creating a Flat Pattern Drawing Assembly P.415 P.424 Activity 14-3 Flat Patterns for Non-sheet Metal Parts P.425 P.431,Lesson 19 MetaForm(有限元法展开),用有限元法来展开复杂零件，填补了设计与分析之间空白,Lesson 20 General Pocket/ Pad(通用槽腔/凸台),用来生成复杂的槽腔/凸台。它是一个特征，但相当于常规造型的许多步操作，因此在钣金零件的造型中非常实用，但往往被许多工程师所忽略。,Lesson 20 General Pocket/ Pad(通