UG高级教程之六.pdf

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1、五、成形特征五、成形特征 Form Features 五、成形特征五、成形特征 Form Features Modeling _假定在部件文件中已存在一个实体假定在部件文件中已存在一个实体. 1. 考虑定位到其上的可选择对象(体边缘、参考特征等，如果需要首先建立它们 ）考虑定位到其上的可选择对象(体边缘、参考特征等，如果需要首先建立它们 ） 2. 选择选择成形特征的型成形特征的型 3. 选择安放表面（一般要求选择平表面，选择安放表面（一般要求选择平表面，General Pocket、General Pad除外）除外） 4. 如果需要为孔和键槽选择通过表面（可以使用基准面 ）如果需要为孔和键槽选

2、择通过表面（可以使用基准面 ） 5. 选择水平或垂直参考方向（对键槽，矩形腔选择水平或垂直参考方向（对键槽，矩形腔 /矩形凸垫）矩形凸垫） 6. 加入尺寸和加入尺寸和 /或角度（实数，代数短语，表达式名 ）或角度（实数，代数短语，表达式名 ） 五、成形特征五、成形特征 Form Features 5.1 相对定位相对定位Relative Positioning 5.2 凸台凸台Boss5.3 凸垫凸垫Pad Fmf_boss.prt fmf_pad_rectangular.prt 5.4 孔孔Hole Fmf_hole_simple.prt 5.5 腔腔Pocket fmf_pocket_re

3、ctangular.prt 5.6 键槽键槽Slot fmf_slot_rectangular.prt 5.7 沟槽沟槽Groove 矩 形球 形矩 形球 形U 形形 fmf_groove.prt 5.8 编缉编缉: Edit FeaturesParameters 通用凸垫通用凸垫General Pad 外 在任意表面上安放任意外形凸垫在任意表面上安放任意外形凸垫 通用腔通用腔General Pocket 在任意表面上安放任意外形凹腔在任意表面上安放任意外形凹腔 通用凸垫与凹腔通用凸垫与凹腔通用凸垫与凹腔通用凸垫与凹腔 允许选择多个面为安放表面。 1 2 3 cdt_gen_pad.prt 通

4、用凸垫与凹腔通用凸垫与凹腔通用凸垫与凹腔通用凸垫与凹腔 Insert Form Feature Pad General Insert Form Feature Pocket General _ 允许建立开口的凸垫与凹腔。 六、参考特征六、参考特征 Reference Features 六、参考特征六、参考特征 Reference Features Modeling 6.1 设计应用设计应用: 安放成形特征和草图安放成形特征和草图 修剪平面修剪平面 通过平面通过平面 定位参考定位参考 旋转轴旋转轴 配对平面配对平面 等等等等 6.2 基准面Datum Plane6.2 基准面Datum Plan

5、e 固定基准平面 在空间的位置是固定的，不能编辑 使用方法同基本体素 相对基准平面 单约束 双约束 三约束：不共线的3点决定一个平面 6.3 基准轴基准轴Datum Axes 6.4 基准坐标系6.4 基准坐标系 6.5编缉：编缉：Edit Features Parameters _当可能时使它们为相对参考当可能时使它们为相对参考 1.为了建立相关性，识别选择的对象为了建立相关性，识别选择的对象 2.改变工作层（改变工作层（Layer:6180） 3.选择 一个点、曲线、边缘、表面、基准面、基准轴或它们的组合按需加入参 数 选择 一个点、曲线、边缘、表面、基准面、基准轴或它们的组合按需加入参

6、数 4.在对象选择之后，选择在对象选择之后，选择 OK或或 APPLY。如果在对象选择之前，选择。如果在对象选择之前，选择 OK或或 APPLY将建立非相关的固定参考特征将建立非相关的固定参考特征 5.基准面基准面 : 如果希望与一条边缘关联，小 心不要选择它的控制点如果希望与一条边缘关联，小 心不要选择它的控制点 当选择表面时 ：平的表面建立角度或偏置关系 ；圆柱表面建立轴关系 或四个相切位置之一 当选择表面时 ：平的表面建立角度或偏置关系 ；圆柱表面建立轴关系 或四个相切位置之一 6.基准轴：提供比显式点和矢量定义更多的可编缉性，如一个圆形阵列是相关 到一基准轴而不是一个点、曲线或边缘 基

7、准轴：提供比显式点和矢量定义更多的可编缉性，如一个圆形阵列是相关 到一基准轴而不是一个点、曲线或边缘 7.考虑安放成形特征、草图等的需要在一分离的层上建立参考特征，并对那个 层建立一个目录或描述以识别它们是必须要的特征 考虑安放成形特征、草图等的需要在一分离的层上建立参考特征，并对那个 层建立一个目录或描述以识别它们是必须要的特征 . 基准增强基准增强基准增强基准增强 支持无对话框的交互:约束与构造方法从选择的几何体推断。 基于约束的基准通过利用标准约束 (重合、平行、相切等) 或通过由系统推断，或通过用 户显式定义建立基准。 基准增强基准面基准增强基准面基准增强基准增强基准增强基准增强基准面

8、基准面基准面基准面 推断推断 点与方向点与方向 三点三点 曲线上点曲线上点 固定基准固定基准 cdt_dat_1.prt 基准增强 基准坐标系基准增强 基准坐标系基准增强基准增强基准增强基准增强 基准坐标系基准坐标系基准坐标系基准坐标系 建立三个基准面和三个基准轴 建立一巳存点在它的原点上，(相关的)。 基准增强基准轴基准增强基准轴基准增强基准增强基准增强基准增强基准轴基准轴基准轴基准轴 七、特征操作七、特征操作 Features operation七、特征操作七、特征操作 Features operation Modeling 七、特征操作七、特征操作 Features operation

9、7.1 边缘倒圆边缘倒圆Edge Blending 边缘倒圆利用动态图形输入域边缘倒圆利用动态图形输入域边缘倒圆利用动态图形输入域边缘倒圆利用动态图形输入域 选择此边缘 MB3 cdt_edge_blend_1.prt _提供对边缘与面倒圆操作的预览。 Insert Feature Operation Edge Blend Insert Feature Operation Face Blend 改进的倒圆图形反馈改进的倒圆图形反馈改进的倒圆图形反馈改进的倒圆图形反馈 改进的边缘倒圆用户介面改进的边缘倒圆用户介面改进的边缘倒圆用户介面改进的边缘倒圆用户介面 _默认利用GWIF 7.2 边缘倒角边

10、缘倒角Chamfer 1 2 3 3 2 1 4 54 5 7.3 面倒圆Face Bland7.3 面倒圆Face Bland 7.4 拔锥拔锥Taper 1 423 7.5 挖空挖空Hollow 1 1 2 2 1 4 2 3 7.6 面偏置 7.7 面缝合7.7 面缝合 7.8 阵列阵列 Instance 矩 形 阵 列矩 形 阵 列 圆 形 阵 列圆 形 阵 列 镜 象 特 征镜 象 特 征 镜 象 体镜 象 体 7.9 修剪体修剪体Trim Body 7.10 螺纹螺纹Thread 细 节 螺 纹细 节 螺 纹 符 号 螺 纹符 号 螺 纹 7.11 比例7.11 比例 八、表达式八

11、、表达式八、表达式八、表达式 Modeling 八、表达式八、表达式 表达式是可以用于控制一个部件特性的算术或条件语句。表达式是可以用于控制一个部件特性的算术或条件语句。 表达式可以定义和控制一个模型的许多尺寸。表达式可以定义和控制一个模型的许多尺寸。 8.1 表达式语言表达式语言 A = b + c 变量名变量名表达式字符串表达式字符串 赋值赋值 运算符运算符算术运算符：、算术运算符：、*、/ 其他函数：其他函数：、=、 5/16” dia. 7 to 9 mm dia. waterlines ?1/4-18 NPT 7/16” dia. 9 to 11 mm dia. waterlines

12、 ?3/8-18 NPT 9/16” dia. 11 to 15 mm dia. waterlines ?1/2-14 NPT 11/16” dia. 15 to 17 mm dia. waterlines Cooling Channels (Water Lines) ?Remember on the Core side to avoid ejector pin holes and be aware of screw locations in the blocks ?As a general rule you cannot have too much water flowing through

13、 the blocks How do I. ? ?How do I put multiple parts in a single Core/Cavity Block? ?Same parts same cavity/core block ?How do I create a Family Mold? ?Unique Parts in Unique Blocks ?Specific workflow ?Parting Line must be at the same plane (adjust the part location) ?How do I create Slide Molds? ?R

14、eason? ?Workflow? ?How do I create Inserts? ?Reason? ?Workflow? How do I put multiple parts in a single Core/Cavity Block? ?The part must have a planer parting surface no steps ?Typically Multi cavity tools are for small parts ?Typically Open/Shut molds no slides How do I put multiple parts in a sin

15、gle Core/Cavity Block? ?The part cannot contain any through holes or cutouts ?This would be a feature that requires a shut-off on the interior of the part This part CANNOT be placed in a multi- cavity tool due to through hole Planer Parting surface How do I put multiple parts in a single Core/Cavity

16、 Block? ?To place multiple parts in one block in SE Mold Tooling: ?Start a new MT project and add the part ?Move the part from the center of the mold using the Orientation Step in the ribbon bar In this case the part was moved 20mm off center in the X direction How do I put multiple parts in a singl

17、e Core/Cavity Block? ?Use the Select Part icon to place another copy of the SAME part into the project ?Again, move the part with the Orientation Step ?Opposite direction of first part (negative value) Mold Centerline How do I put multiple parts in a single Core/Cavity Block? ?Duplicate this process

18、 until you have the number of parts you want in a single cavity/core block ?Remember you must be able to create a BALANCED runner when completed ?Next create a parting zone ?Core/Cavity Insert Mold ?Select ALL the parts How do I put multiple parts in a single Core/Cavity Block? ?Finish the parting z

19、one as you would for a single part cavity tool by sizing the block for the mold base ?If the Parting Zone fails, be sure that the part has a planer parting surface and that there are no through holes in the part How do I put multiple parts in a single Core/Cavity Block? ?EXAMPLE is included on the M

20、T demo CD MOLD TOOLING DEMOSetup05-CompletedOTHER MoldDesigns How do I create a Family Mold? ?Add and orient the first part “A” as you would a single part mold ?Create the Core/Cavity block Parting Zone for part “A” ?Pattern the instance in just X or just Y direction for the desired number of “A” pa

21、rts set opposite direction to 1 ?Rotate the parts only as needed to keep gate location toward the center of the mold ?Use Auto Center option How do I create a Family Mold? ?Expand the PartingZone1Pattern1 and PartingZone1_1 ?RMB click on the Plastic Part and select Show Only ?Add another part B ?Rot

22、ate the part as needed depending on where the part is to be placed in the mold Part “A” Part “B” How do I create a Family Mold? ?You must now move the parting surface for the second part to the exact same plane as the first part ?In the lower pane of the assembly pathfinder, DELETE the x-y planer al

23、ignment How do I create a Family Mold? ?Create a new relationship to move the 2ndpart to the same parting plane as the 1st Part “A” Part “B” How do I create a Family Mold? ?HIDE Part “A” ?Create the parting zone for Part “B” ?Change to Core/Cavity Insert Mold and select Part “B” ?Remember to reselec

24、t the opening point to match the parting plane of Part “A” How do I create a Family Mold? ?Pattern the instance in just X or just Y direction for the desired number of “B” set opposite direction to 1 ?Rotate the parts only as needed to keep gate location toward the center of the mold ?Use Auto Cente

25、r option How do I create a Family Mold? ?Now both sets of Core/Cavity Blocks are in the same position ?Use the Move command in Solid Edge Assembly to offset each set of Core/Cavity blocks from the center of the mold ?Select the sets from the assembly pathfinder in Edgebar ?Remember that is important

26、 to use similar parts in a family mold to achieve a balanced mold How do I create a Family Mold? ?Type in the offset distance in the ribbon bar How do I create a Family Mold? ?Continue by creating the Core/Cavity plates with the PartingZone command ?Select the Integer Plate Mold option ?Select BOTH

27、sets of Core/Cavity Blocks How do I create a Family Mold? ?Finish the mold in the same way as a single part, multi-cavity mold How do I create a Family Mold? ?EXAMPLE MOLD TOOLING DEMOSetup05-CompletedOTHER MoldDesigns How do I create Slide Molds? ?What is a slide mold? ?Mechanical (or pneumatic or

28、hydraulic) components used for creating internal and/or side features ?Sometimes used for creating undercuts in the part How do I create Slide Molds? - Workflow ?First, create 3 new construction parts from the original plastic part model ?Insert Part Copy ?MUST APPLY THE SAME SHRINK FACTOR TO ALL 3

29、INTERPART COPIES (A, B, and C) Original Part Mold Part (B) Part w/Shrink (A) Slide Insert (C) copy as construction How do I create Slide Molds? - Workflow ?In the Mold Part (B) fill in the area requiring a slide by creating surfaces ?Stitch surfaces and use Boolean to create a solid model with slide

30、 area filled Create patching surfaces Boolean-Unite Mold Part (B) Mold Part (B) modified How do I create Slide Molds? - Workflow ?This part will be used in the Mold Tooling session ?DO NOT apply a shrink factor in Mold Tooling using this workflow (make 0% -or- scale = 1) ?Plate thickness will need t

31、o be thicker than normal to allow for slide components ?Position and pattern the core/cavity blocks to allow space for slides and other slide components How do I create Slide Molds? - Workflow ?Finish the Mold Tooling project as you would an open/shut mold ?Add runner, ejector pins, support pillars,

32、 mounting screws, etc. ?Insert the Part w/Shrink (A) into the PartingZone1_1 assembly ?Edit the core/cavity blocks to include a cutout for the slide insert ?User can create Assembly- Driven part feature ?Include edges from Part w/Shrink (A) Part w/Shrink (A) How do I create Slide Molds? - Workflow ?

33、The Slide Insert (C) part requires the included part copy to be inserted as construction ?Model the slide insert using standard modeling techniques ?Use a Boolean operation to create the slide insert “face” Part copy - construction How do I create Slide Molds? - Workflow ?Model slide components ?Sli

34、de Body; Gibs; Wear plates; Cam pins; Heel blocks; etc. ?Use top down method to design slide in context of the assembly How do I create Slide Molds? - Workflow ?Add Slide Insert Slide Face (Insert) Cam Pin Slide Body Heel Block Wear Plate Gib How do I create Slide Molds? - Workflow ?An assembly sket

35、ch can be used to help design the slide components to ensure Cam Pin stroke and slide movement Cam Pin Molding area How do I create Slide Molds? - Workflow ?Edit the Core/Cavity Plates to create cutouts for Mold components using standard modeling techniques included offset edges from slide component

36、s How do I create Slide Molds? - Workflow ?REMEMBER! Any changes made to the shrink factor will have to be manually updated in each part that includes an interpart copy Mold Part (B)Part w/Shrink (A) Slide Insert (C) copy as construction How do I create Slide Molds? - Workflow ?EXAMPLE is included o

37、n the MT demo CD MOLD TOOLING DEMOSetup05-CompletedOTHER MoldDesigns How do I create Inserts? ?What is an Insert? ?Core/Cavity blocks are often divided up into smaller pieces (Inserts) for manufacturability ?Grinding, milling, and machining is cheaper than EDM burning the steel for the blocks How do

38、 I create Inserts? ?Create a construction part from the original Core/Cavity Block for each insert you wish to create ?Insert Part Copy of block check Copy as construction How do I create Inserts? ?Create a protrusion that extends through the block and envelops the core area ?Use Boolean Intersect t

39、o create the insert How do I create Inserts? ?Add a “foot” onto the insert to retain it in the Core/Cavity block Using a protrusion with nested profiles in this case ?Save new file How do I create Inserts? ?Create a new part file and insert a part copy of the Core/Cavity block as was done to create

40、the insert ?DO NOT make this part copy construction ?Create cutouts for insert including clearance for the “Foot” ?Save as a NEW Core block How do I create Inserts? ?Create a subassembly of the NEW Core Block and Inserts ?CTL + Drag while adding the insert will put it in the same relative position i

41、n the block as when it was created ?In this case, there are 4 exact cores and so an assembly pattern sketch was created and the inserts patterned How do I create Inserts? ?Add the new subassembly at the same position as the original Core Block part ?IPA into PartingZone1_1 to place the new subassemb

42、ly ?Change the original block occurrence properties so that it will not be included in the parts or display in the Draft sheet How do I create Inserts? ?EXAMPLE MOLD TOOLING DEMOSetup05-CompletedOTHER MoldDesigns Things to Look For When MT Fails to Create Core/Cavity Blocks ?MT may not have created

43、a valid parting surface ?may require removing surfaces, creating new loops, creating new surfaces to add to parting surface, etc. ?Internal stitchable edges may exist in the parting zone surfaces ?MT may not have calculated the correct face sorting with respect to core/cavity sides ?There may be sup

44、pressed features ?Core/Cavity blocks may be larger than the parting zone surfaces It is important to realize that every plastic part will be different; therefore, one must take general techniques shown and apply them to individual problems in order to solve them. What to do when Mold Tooling fails t

45、o create core and cavity ?On complex parts, Solid Edge Mold Tooling application may fail to create a corecavity from the specified plastic part ?A common cause is when the fill surfaces/parting surfaces can not be automatically created ?The following slides will outline some techniques that will all

46、ow the Mold Tooling App. to create the core/cavity insert blocks Techniques to Create Healthy Fill Surfaces ?RMB on the Parting Zone entry in Pathfinder Edit Definition ?Notice the fill surfaces that were created based off of the loops created and the fill type set in the preferences See how they lo

47、op back on each other (invalid surface) Techniques to Create Healthy Parting Zone Surfaces ?Remove the BAD surface if it exists ?Click on the Loops Step on the ribbon bar ?Click on the OUTER loop as shown ?Set the surface fill type to NONE You will get a message dialog saying a “build” is recommende

48、d. ?Click OK and Preview to “build”. This will remove the BAD surface from the parting zone. Techniques to Create Healthy Parting Zone Surfaces ?General order for attempting to create the Parting Zone ?Try to get outer loop modified such that a fill surface can be automatically generated ?Add/Modify

49、 Inner loops such that a fill surface can be generated automatically ?Manually create surfaces as needed to complete the parting zone surface if required. Then, add the manually created surface(s) to the Mold Tooling (MT) Injection and Ejection “print” surfaces. NOTE: The steps required will be different for every plastic model due to different geometry being involved. This example covered in detail will only show the available techniques that can be applie