钣金设计理论和方法CATIA培训重点教程

1、1钣金设计理论和方法CATIA培训重点教程2课程介绍先修课程:Catia V5基础Catia V5零件设计Catia V5装配设计Catia V5工程图设计: 课程目的本课程研究利用CATIA V5建立和编辑修改钣金特征和零件的方法。学员对象从事Catia V5钣金设计的用户3目錄鈑金設計基礎1鈑金設計概述工作臺介紹:使用者介面、術語、一般過程2 鈑金參數3 鈑金壁板（Walls）4 鈑金彎曲（Bends)和凸緣(Flanges)5 鈑金沖孔（Cut Outs），平面陣列模式及特徵6 生成2D鈑金展開視圖7 修改鈑金零件沈飞工学院4进入工作台用户接口术语 了解一般过程介绍钣金设计工作台钣金设计

2、概述5进入工作台 可以从1-开始菜单 2-档菜单 3-工作台工具 进入钣金设计工作台，建立一个包含几何元素的 Part Body1-2-3-6文件扩展名.CATPart (与普通零件设计相同)钣金设计工具.钣金参数零件树标准工具栏特征.钣金设计用户接口:进入草图器.钣金参数7Insert菜单或工具栏 钣金设计用户接口:钣金设计工具扫掠壁板（Walls）冲压（Stampings）展开（Unfold）钣金工具弯曲（Bend）数组（Patterns）增强复制（Power Copy）8术语 零件 由一个或多个壁板、弯曲和特征组成参数 通常是指设计零件的壁板厚度、弯曲半径和起伏类型的值起始壁板 用草图（

3、轮廓）生成，可以是一个或一组拉伸壁板特征 施加在零件上的形态，如：冲孔、数组和冲压等9General ProcessFrom Assembly create a new part(Top-down approach)orCreate a new part insert in assembly(Bottom-up approach)Assign Material ParametersCreate different types of wallsAdd冲孔and 3D FeaturesAdd different types of弯曲Modify Wall Thickness and Wall Si

4、zesCreating a Flat View of the part10钣金ParametersIn this lesson, you will see how to start a钣金part by assigning the basic parameter needed to create the part. Defining钣金Parameters11Before starting to create any钣金part, define the钣金Parameters of the part. These are common characteristics that when def

5、ined will make creation easier and thus limit your need to supply data during creation of the part.Defining ParametersParameters TabBend Extremities Tab12Parameters are the common characteristic used in the creation of the part. They are as simple as stating the dimensional requirement of the materi

6、al and bend radiusWhat are Parameters ?It is important to note here that only one set of parameters can be assigned in a CATPart, therefore you are limited to one part per document.13In order to start there are three basic parameters that need to be assigned: Material Thickness Bend Radius Bend Reli

7、ef TypeWhat Parameters need to be defined ?Bend RadiusTypes of different Bend ReliefsSquare ReliefMinimum withno reliefRound ReliefLinearTangentMaximumMaterial ThicknessRemember, the Bend Radius assigned here is the standard Bend Radius to be used on the part. This will be used to create all Bend Ra

8、dii unless specified otherwise during the creation.14Defining Material ThicknessSelect the钣金Parameter Icon1Activate the Parameters tab in the钣金Parameters window2With the Thickness field active, key in the new value3If the Material Thickness is all you are changing, select OK to end the modification4

9、Create parts15Defining Material Bend RadiusSelect the钣金Parameter Icon1Activate the Parameters Tab in the钣金Parameters window2Key in the new Bend RadiusBend radii can be as small as 0.01 mm. 0 Radius is not available yet.34Select OKCreate parts16Selecting the Bend Relief TypeSelect the钣金Parameter Icon

10、1Select the Bend Extremities Tab in the钣金Parameters window2Select the type of Bend Relief displayed in the window3The relief with its dimensions are displayed4If the Bend Radius is all you are changing, select OK to end the modification5Where possible bend relief values, L1 and L2 can be modified to

11、 suit your special needsCreate parts17In this lesson, you will see how to start a钣金part and different ways to define walls钣金Walls Defining Walls from Scratch Defining Walls on Existing Parts 钣金Walls recap exercise18You will learn how to create the 5 basic types of walls offered in the钣金workbenchDefi

12、ning Walls from ScratchProfilewallWall on EdgeExtruded WallRolled WallPierced Wall19To start a钣金part, create some type of wall first to start from. It can be as little as one line that you can extrude a wall from or a complex pro create many walls from or a pro make an individual wall.What are walls

13、 ?Be aware that where you select edges, top vs bottom will drive a different proposal for your wall. For example, a top selection may force your wall to go in an upward direction while a bottom selection may force your wall in a downward direction.An example of how different ways could be used to cr

14、eate this part is as follows:Wall 1 could have been created first as a flat pro and then walls 2, 3, and 4 could have been done as walls on edgeWall 1, 2, and 3 could have been created with an extrude and then wall 4 could have been done as a wall on edge123420The Pro is used to create a wall of a s

15、pecific shape. Often used as a first wall of a partWhen to use the various types of walls ?The Extruded walls are used to create a group of walls using a specific profile. Here it is used to build a simple “U” shaped chassis or a hat section used to strengthen other parts.The Wall on Edge is used to

16、 create a wall on an edge of an existing wall.You can also select an edge, click on the wall icon and draw the sketch you want21ProEnter the Sketcheron xy planeand select the proDraw the SketchExit Sketcher and select the pro iconGrowth arrow defaults upward. If needed, invert button3124Select OK to

17、 create the wall5Remember, the direction of growth effects how the wall will be modified if you change the Material thickness later growth arrow22Pro (with冲孔)Enter the Sketcheron xy planeand select the proDraw the SketchExit Sketcher and select the pro iconGrowth arrow defaults upward. If needed, in

18、vert button3124Select OK to create the wall5Remember, the direction of growth effects how the wall will be modified if you change the Material thickness later23Walls on an EdgeSelect the wall on edge iconSelect OK to create the wall512Key in the new values and select a dimension options3To reverse s

19、ketch pro, select this button4Select the edge to attach the wall too6Select the “With Bend” option to automatically create the bend24Walls on an Edge (with clearance)Note: thereference wall is not impacted by the new wallSelect the wall on edge iconSelect OK to create the wall12Key in the new values

20、 and select a dimension options3Select the clearance option. The value is by default driven by bend radius4Select the edge to attach the wall to6Select the “With Bend” option to automatically create the bend525Extruded WallsNote: in the tree, each wall is created separately under the extrusion. No s

21、ketches for the walls are created; the sketch for the original pro kept.Key or select theextrusion parameters.Enter the Sketcheron xy planeand select the proSketch the profile12Exit Sketcher and select the Extrusion wall icon3Select OK45The walls can be created on one or both sides of the sketch (Se

22、cond Limit). Also, the material thickness can be in either directionor symmetrically around the profile(symmetrical thickness checkbox)26IsolateWallsMB3 on Extrusion or Edge Wall and select item object and Isolate1If an Extrusion, Select a wall25 local axis, 6 sketches and some coincidence constrain

23、ts are automatically created for this extrusion.Can be performed on: extrusion walls wall on edgeYou cannot undo anIsolate action after having modified the wall. Isolating a Wall on Edge erases all updating data.27Rolled WallsEnter the Sketcheron xy planeand select the proDraw the SketchExit Sketche

24、r and select the Extrude iconKey or select theextrusion parameters.3124Select OK to create the wall5Remember the direction of growth effects how the wall will be modified if you change the Material thickness later28Defining Walls on Existing PartsYou will learn how to define walls on existing solid

25、parts29Another way to start creating钣金walls is to take an existing solid and recognize (= change) the solid walls into钣金walls.What is Wall Recognition?Be aware that any cut outs in the part, when it is recognized, can only be modified in the Part Design workbench.Reference Wall30Walls Recognition De

26、finition dialog box 2 Wall creation modes:Part body recognition: the whole solid is processed and walls are created wherever possible.Only selected faces: only explicitly selected faces of the solid are processed and the corresponding walls are created.Compulsory walls - are faces from which the wal

27、ls are to be generated when there might be an ambiguity. For example, if the initial part is a box, you will need to select two opposite inner faces and outer faces on the other two sides of the box, in order to avoid overlapping when generating the walls.Internal profiles recognition mode: As cut o

28、ut wall: generates walls with inner contours (no cutout feature is generated)One cut out by wall: regardless of how many pockets there are on a face of the solid, only one cutout feature is generated per wallOne cut out by profile: for each inner contour on the sketch-based solid, a cutout feature i

29、s generatedNone: whether there are pockets on the solid faces, or not, no cutout feature is created in the resulting钣金features.31RecognizingWalls on PartsChanges to Geometry will have to be done from the original creation geometry in the Part Design workbenchSelect the Recognize icon214Select the Un

30、fold iconThe Tree is updated with the New WallsSelect the Face of the Reference WallThe thickness of the shell and the radius of the Fillet are taken as the default values in the SheetMetal Parameters.53Select the Definition parameters32钣金 弯曲and凸缘In this lesson, you will see how to add弯曲to a part an

31、d also see some different type of凸缘that can be used when creating parts Defining弯曲between Walls Defining Different types of凸缘available 钣金 弯曲and凸缘recap exercise33弯曲can be created by four ways. If you choose, you can create your bend each time you create a wall on another wall or you can create a bunc

32、h of walls that show how your part will look and then use Automatic弯曲to create all of them at one time.Defining弯曲for WallsSingular BendAutomatic弯曲Conical 弯曲弯曲 from flat34A钣金part is created from one piece of metal that is cut to the shape needed and folded to create the part. These folds are what is

33、call弯曲.What are弯曲?BendBend ReliefBend Relief is the material cut out (removed) to allow the folding of the part without tearing the material or causing it deform35In V5, the new methodology is to create groups of walls which have a common bend size. Allowing a group of walls to be created all at one

34、 time and save the steps of having to confirm the direction each time.When to use Automatic弯曲?In cases where you have non-standard弯曲,you will have to use the singular bend capability and define direction. Therefore, it is important to make sure your standard bend is the most common bend size on your

35、 part.Singular Bend Created firstAll other弯曲are created with Automatic弯曲36Using the Auto Bend FunctionToday, the direction of the bend is chosen for you.Display the part you wish to have the弯曲added too.Select the Automatic Bend icon12All of the bend radii are created at the default value.37Using the

36、 Singular Bend functionBend arrows can be selected to reverse them and the direction of the bend.Select each of the walls involved in the bend2Select the Bend icon1The Bend Definition window is displayed indicating the Walls involved, radius value and angular value3The bend arrows are displayed show

37、ing the wall bend direction4The bend and reliefs are created as assigned in the original parameters window38Using theConical Bend functionBend arrows can be selected to reverse them and the direction of the bend.Select each of the walls involved in the bend2Select the Conical Bend icon1The Bend Defi

38、nition window is displayed indicating the Walls involved,radius values and angular value3The bend arrows are displayed showing the wall bend direction439Using the BendFrom FlatfunctionSketch a line on the future bend area1The BendFrom FlatDefinition window is displayed indicating theSketch involved,

39、radius values and angular value3Select OK4Select the Bend From Flat icon and the sketch240Modifying a Standard Bend RadiusThis process can also be used to create a bend by selecting the equation iconSelect each of the walls involved in the bend2Select the Bend icon1The Bend Definition window is disp

40、layed indicating the Walls involved, radius value and angular value3Key in the new value in the Bend definition window. Make sure the bend arrows are pointing in the proper directionRight-click in the Radius field and select Formula/Deactivate45The bend and reliefs are created as assigned in the ori

41、ginal parameters window41Using the Corner Relief function2You have several shapes for relieves: round, square, triangular.Select the More button and switch toBend Corner Relief Tab and activate theCorner Relief option3Double-click on the bend to edit it1Click OK to validateYou can also define the Co

42、rner Relief in the SheetMetal Parameters42Using theUserCorner Relief functionSelect the Corner Relief Icon, the sketch and the three impacted弯曲directly on the geometry3Unfold the part; The User Corner Relief must be done on the unfolded part1Sketch the desired profiles for the Corner Relief Area2Sel

43、ect OK4You can also have access to a catalog of pre-definedsketches instead of drawing your own sketch.43凸缘come in four different types: Regular Flange, Hem Bend, Teardrop and Swept Flange.Defining凸缘Regular FlangeHem BendTear DropSwept Flange44凸缘are different ways to form钣金into tabs, walls and edges

44、 that give functionality, beauty, strength and safety to the part.What are凸缘?45Regular凸缘are used to create tabs in cut outs and simple凸缘around the edges of partsWhen to use the various types of凸缘?Tear Drops can also serve to create decorative edges as well as create things like hinge pins openingsHe

45、m弯曲are used to strengthen long thin钣金parts and to also supply a smooth safe edgeSwept凸缘are used to sweep profiles around exterior edges of parts.46Simple凸缘Note: the edges selected can be one single edge, straight or curved or any number of either as long as they are connected.Select the Flange icon1

46、Select the edges2Key in an angle valueKey in the radius value3Key in the length value45Select OK to create the flange647The minimum radius accepted is .01 mmKey in a length4Select OK to create the Hem bendSelect the Hem Bend iconSelect the edgeKey in a radius valueAs with any flange, multiple edges

47、can be selected to wrap it around the part.5Hem弯曲12348Select the Tear Drop Bend iconKey the lengthSelect an edge2Key in the radius3Select OK to create Tear Drop Bend4Tear Drop凸缘15The length dimension cannot be less then the radius but it can be the same; allowing you to create a hinge pin opening.49

48、 Swept凸缘Only a single line pro to be created here. The flange key will add the thickness per the parameters characteristicsSelect the Swept Flange iconSelect the Spine the bend is to be located on.2Select OK to create the flange4Select the pro be swept13The element connecting to the edge must be tan

49、gent and coincident with the edge.50钣金Cut Outs, Flat Pattern Mode and FeaturesIn this lesson, you will see how to add Cut Outs to parts, pattern them, as well as how to make use of the 3D Features available.Defining Cut Outs in WallsGoing to Flat Pattern ModeDefining a 3D Feature钣金Cut Outs, Patterns

50、 and Features recap exercise51In the钣金workbench there are no Holes or Pocket icons as in the Part Design workbench. Openings in a钣金part are all done with a Cut Out icon.Defining Cut Outs in Walls52A Cut Out is any opening in a钣金wall. It can be anything, from as simple as circular hole to a more comp

51、lex cut out. Cut Outs can be patterned just as in the Part Design workbench.What are Cut Outs ?The Cut Out icon is very similar to the Pocket icon in the Part Design workbench and has all of the depth capabilities such as “Up to Next” and “Up to Last”A cut-out can be created with an open contour ske

52、tch.53Cut Outs are used to subtract material to create a hole, pocket, notch, slot, or any other type opening. They can be as simple as a circle or more complex by having many line, arc, spline segments.When to use Cut Outs ?After creating a wall, it is possible to add additional slots on the exteri

53、or of the wall, add notches, or chamfers with cut outs without modifying the wall sketch.Internal wall Cut OutsCutOut used to modify an existing wall54Creating a Cut OutTip: For钣金parts, the use of “Up To Next” will make modification easier.Create the pro the cutout using the sketcherSelect OK1Select

54、 the parameters of the cut outReturn to 3D and select the Cutout icon245Select the pro make it active3Tip: “Using Up to Last” allows for the cutout to go through both walls with one tree entry55CreatingCornersYou have two ways to create Corners: select each edge or select the “Select All” buttonSele

55、ct the Corners iconKey in the radius value31Select OK4Select the edge(s)2If you check the Convex Edge(s) button and you select a concave edge, a warning is issued indicating that you did not select an edge corresponding to the active type.Once you have selected an edge, you can no longer modify the

56、checkbox options, unless you cancel the selection.56CreatingChamfersYou have two ways to create Chamfers: select Sharp edge or Weld iconSelect the Chamfer iconSelect options and Key values41Select OK5Select the type:2Select the edge(s)3Sharp or Weld57The different type ofPatternsRectangular PatternC

57、ircular PatternUser PatternSeveral Parameter configurations. On each case, fill two of the three parameters.The reference direction element can be selected directly on the geometry (edges).The “Complete Crown” Parameter is very useful to instantiate a feature all around a crown.For the position, sel

58、ect a sketch containing points where the new features will be instantiated.58Patterning a Cut Out2Select the Pattern iconSelect OK to create the patternDefine the pattern parameters314Select the Cut Out to patternNote: instances of the pattern can be turned off achieve a staggered pattern59When desi

59、gning a钣金part, you may find times when you need to see the part in its Flattened state for checking or adding physical cut outs.Going to Flat Pattern ModeThe part can also be display in folded and the unfolded states in two different windows at the same time60Flat Pattern Mode is when you are viewin

60、g the钣金part in its unfolding condition. Allowing all of the cut outs, edges, bend limits and foot print stamp to be displayedWhat is Flat Pattern Mode ?Note: there are times when elements will not be displayed in Flat Pattern Mode. For example, if a wall does not have a bend assigned to it. Also, if