CATIA达索官方曲面初级培训练习.ppt

Wireframe and Surface DesignCATIA Training ExercisesVersion 5 Release 9June 2002EDU-CAT-E-WFS-FX-V5R91Copyright DASSAULT SYSTEMES 2002Table of Contents1.Master Exercise: Mobile Phonep.3Creating the wireframe geometryp.7Creating the surfaces p.12Trimming and joining the body surfaces p.15Creating the part body p.19Modifying the geometry p.212.Recap Exercise: Buttonp.23Creating the wireframe geometry p.24Creating the surfaces p.26Creating the solidp.28Modifying the geometryp.313.Exercise: Wrench Bodyp.33Creating the surface of the handlep.37Creating a lofted surface to link the partsp.39Creating the side surface of the headp.42Creating a connecting surfacep.44Completing the wrench bodyp.462Copyright DASSAULT SYSTEMES 2002Mobile Phone ExerciseMobile Phone: PresentationMobile Phone (1): Creating wireframe geometryMobile Phone (2): Creating basic surfacesMobile Phone (3): Trimming and joining the body surfacesMobile Phone (4): Creating the part bodyMobile Phone (5): Modifying the Geometry3Copyright DASSAULT SYSTEMES 2002And now practice in the context of the Mobile phoneEnter the Wireframe and Surface Design workbenchCreate the surfaces2Trim and join the body surfaces3Create the part body4Enter the Part Design workbenchModify the geometry5Create the wireframe geometry14Copyright DASSAULT SYSTEMES 2002ExerciseMobile Phone : PresentationIn this exercise you will see how to create a mobile phone body using the Wireframe and Surface Design and Part Design workbenches:m Creating wireframe elements (Points, splines, combine curves, circles, lines)m Creating surfaces (swept, extruded, revolved surfaces)m Manipulating surfaces (trim, symmetry, join)m Creating solid from surface (Close, fillet, shell)m Modifying the geometry35 min.5Copyright DASSAULT SYSTEMES 2002Design Intent : Mobile Phone• Creation of guide and center curves by using combine, lines, sketcher, and splines.• Creation of surfaces using Sweep, Extrude and Revolution• Operations on surfaces using Trim and Join • Creation of solid from surfaces using Close, Fillet and Shell• Modification of the geometry by changing parameters of the surface definition6Copyright DASSAULT SYSTEMES 2002Create the guide curves and profiles.ExerciseMobile Phone: Creating the wireframe geometry10 min.7Copyright DASSAULT SYSTEMES 20021- Create these points : (0,0,9), (40,0,7.5), (60,0,6), (80,0,5.8) and (90,0,5.8).2- Draw a spline passing through these points imposing a tangency condition with the X axis at the two extremities.3- Create these points : (0,17,0), (20,20,0), (40,19,0), (60,18,0) and (90,18,0).4- Draw a spline passing through these points imposing a tangency condition with the X axis at the last extremity.5- Create a combine curve using the two previous spline curves. Rename it “Guide curve 1”6- Create these points : (0,0,-3), (70,0,-4) and (90,0,-4).7- Draw a spline passing through these points imposing a tangency condition with the X axis at the last extremity.8- Create a combine curve using the last created spline curve and the second spline curve. Rename it “Guide curve 2”.Do It Yourself (1/4)Guide curve 1Guide curve 2Part used: Mobile_phone_step1-1.CATPart8Copyright DASSAULT SYSTEMES 20027- Create this sketch in the YZ plane :Rename it “Profile 1”.8- Create this circle centered on the point (70,0,0):9- Create the circle centered on the point (20,0,0): Do It Yourself (2/4)9Copyright DASSAULT SYSTEMES 2002Do It Yourself (3/4)7- Create a combine curve using the first created spline and the second circle. Rename it “Guide curve 3”.8- Create a combine curve using the third created spline and the second circle.Rename it “Guide curve 4”.9- Create a combine curve using the first created spline and the first circle.Rename it “Guide curve 5”.10- Create a combine curve using the third created spline and the first circle.Rename it “Guide curve 6”.11- Create a line starting from the point (0,0,-300) and X directed (whatever it’s length, it will be used as an axis).10Copyright DASSAULT SYSTEMES 2002Create this sketch in the YZ plane and rename it “Profile 2”.Do It Yourself (4/4)11Copyright DASSAULT SYSTEMES 2002ExerciseMobile Phone: Creating the surfacesCreate swept, extruded and revolved surfaces.10 min.12Copyright DASSAULT SYSTEMES 2002Do It Yourself (1/2)P1 users have to load the next CATIA Part to go on.1- Create a swept surface using “Guide curve 1” and “Guide curve 2” as guide curves, the sketch “Profile 1”as profile and its two vertex points as anchor points.2- Create a circle swept surface using “Guide curve 3” and “Guide curve 4” as guide curve and “Profile 2” as profile and its two vertex points as anchor points.3- Create a circle swept surface using “Guide curve 5” and “Guide curve 6” as guide curve and “Profile 2” as profile and its two vertex points as anchor points.Note : switch on the option “Position Profile” for the two previous swept surfaces. Part used: Mobile_phone_step2-1.CATPart13Copyright DASSAULT SYSTEMES 2002Do It Yourself (2/2)4- Extrude the spline 3 using the ZX plane as direction (Length=25mm).5- Create a revolution surface using Spline 1 as profile and Line 1 as axis (Angle 1=0deg and angle 2=5deg).14Copyright DASSAULT SYSTEMES 2002ExerciseMobile Phone: Trimming and joining the body surfacesTrim the surfaces by selecting the surface area you want to keep.5 min.15Copyright DASSAULT SYSTEMES 2002Do It Yourself (1/3)1- Trim the first created swept surface with the revolution surface.2- Trim the previous trim surface with the extruded surface.Part used: Mobile_phone_step3-1.CATPart16Copyright DASSAULT SYSTEMES 2002Do It Yourself (2/3)3- Trim the previous trim surface with the first circle swept surface.4- Trim the last trim surface with the second circle swept surface.17Copyright DASSAULT SYSTEMES 2002Do It Yourself (3/3)5- Symmetrize the resulting surface using the XZ plane as reference and join it with the last trim surface.18Copyright DASSAULT SYSTEMES 2002ExerciseMobile Phone: Creating the part bodyClose the body surface into a solid, then fillet and shell the solid.5 min.19Copyright DASSAULT SYSTEMES 2002Do It YourselfAccess the Part Design workbench and define in work object the “Solid” body.1- Close the surface Body surface.2- Add variable fillets on the two side top edges (from 4mm to 2mm)3- Add 1mm edge fillets on these four edges :Part used: Mobile_phone_step4-1.CATPart20Copyright DASSAULT SYSTEMES 2002ExerciseMobile Phone: Modifying the geometryModify the geometry by modifying a construction element.5 min.21Copyright DASSAULT SYSTEMES 2002Do It Yourself1- Display the second spline and its points.2- Double-click on Point.6 to change its Y component value to 16mm.You will modify the overall shape of the part by changing the parameters of a construction element.Part used: Mobile_phone_step5-1.CATPart22Copyright DASSAULT SYSTEMES 2002Recap ExerciseIn this exercise you will see how to create a button body using the Wireframe and Surface Design and Part Design workbenches:m Creating the profilesm Extruding the profilem Creating the solid partm Modifying the geometry25 min.23Copyright DASSAULT SYSTEMES 2002ExerciseButton (Step 1) : Creating the wireframe geometryIn this step you will:m Create the pointsm Create the profile curvesm Create the direction lines5 min.24Copyright DASSAULT SYSTEMES 2002Do It Yourself1- Create 5 points : Pt1(0,0,5), Pt2(0,10,9), Pt3(0,23,7), Pt4(0,30,8), Pt5(-20,30,7)2- Create a spline passing through Pt1 to Pt43- Create a line passing through Pt4 and Pt54- Draw a sketch on XY plane with two coincidences and a radius of 20mm5- Draw a vertical line on YZ planePt1 Pt2 Pt3 Pt4 Pt5 Spline.1 Line.1Pt5 Pt1 Sketch on XY plane (4-)Line on YZ plane (5-)Points, Spline, Line (1-, 2-, 3-)Create the wireframe geometry:Button_step1.CATPart25Copyright DASSAULT SYSTEMES 2002ExerciseButton (Step 2) : Creating the surfacesIn this step you will:m Create extruded surfaces5 min.26Copyright DASSAULT SYSTEMES 2002Do It Yourself1- Create the first extruded surface : select profile Sketch.1 and direction Sketch.22- Create the second extruded surface : select profile Spline.1 and direction Line.1Spline.1 Line.1 Sketch.1 Sketch.2 Surface Extrude. 1 (1-)Surface Extrude. 2 ( 2-)Create the basic surfaces:Button_step2-3.CATPart27Copyright DASSAULT SYSTEMES 2002ExerciseButton (Step 3): Creating the solidIn this step you will:m Create a pad using the existing surfaces as limitsm Add fillets on edgesm Shell the part10 min.28Copyright DASSAULT SYSTEMES 2002Sketch.3 on XY plane (1-)Sketch.4 YZ plane (2-)1- Create a sketch (rectangular contour) on the XY plane 2- Create a sketch (trapezoidal contour) on the YZ plane Do It Yourself (1/2)Button_step4.CATPart29Copyright DASSAULT SYSTEMES 2002Pad up to surface (3-) Split of pad (4-)Fillets (6-)3- Create a pad on Sketch.3, up to the Extrude.2 surface4- Split Pad.1 with Extrude.1 as splitting surface5- Create a pad on Sketch.4 up to the Extrude.1 surface6- Make 1.5 mm fillets on the 6 horizontal and vertical edges7- Shell the bottom faces with 1mm (5 faces)Do It Yourself (2/2)Pad up to surface (5-) Shell (7-)30Copyright DASSAULT SYSTEMES 2002ExerciseButton (Step 4): Modifying the geometryIn this step you will:m Modify the geometry by moving the definition points of the spline and changing parameters in the Sketcher5 min.31Copyright DASSAULT SYSTEMES 20021- Double click on Pt3 and change the Z value to 5mm to modify the shape of the spline2- Open Sketch.1 to change the radius value to 25mmPt3 Sketch.1 (2-)Point on spline (1-)Do It YourselfButton_step5.CATPart32Copyright DASSAULT SYSTEMES 2002Wrench Body ExerciseWrench Body: PresentationWrench Body (1): Creating the Surface of the HandleWrench Body (2): Creating a Lofted Surface to Link the PartsWrench Body (3): Creating the Side Surface of the HeadWrench Body (4): Creating a Connecting SurfaceWrench Body (5): Completing the Wrench Body33Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : PresentationIn this exercise you will learn how to create a wrench body using the Wireframe and Surface Design and Part Design workbenches :m Creating wireframe elements (point, line, spline)m Creating surfaces (revolution, loft, sweep)m Manipulating surfaces (symmetry, join)m Creating solid from surface (close, extrude)35 min.34Copyright DASSAULT SYSTEMES 2002Design Intent : Wrench Body• Creation of guide, section and spine curves using spline, sketcher, project and split• Creation of revolution, loft and sweep surfaces• Creation of solid from surfaces using close and thick35Copyright DASSAULT SYSTEMES 2002And now practice in the context of the Wrench BodyEnter the Wireframe and Surface Design workbenchEnter the Part Design workbenchCreate the surface of the handle1Create a lofted surface to link the parts2Create the side surface of the head3Create a connecting surface4Complete the wrench body536Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : Creating the Surface of the HandleCreate the surface of the handle by revolving a spline defined in 3D.10 min.37Copyright DASSAULT SYSTEMES 2002Do It Yourself1- In the WIREFRAME Open Body create three points : (115,7,0), (122,6,0) and (127,5,0). Rename them Point A, Point B and Point C.2- Create a spline selecting Vertex 1 then points A to C and finally Vertex 2.3- Impose horizontal tangency at the end points of the spline.4- In the SURFACES Open Body create a surface, revolving the spline 360 degrees around the horizontal line of the sketch. (360-degree revolution is needed for the downstream close operation to create a solid in Part Design).Revolving surface (4-)Points, Spline (1-, 2-, 3-)Spline 1Vertex 2Vertex 1ABCPart used: Wrench_body_step1.CATPart38Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : Creating a Lofted Surface to Link the PartsCreate a lofted surface to associate the head with the link.10 min.39Copyright DASSAULT SYSTEMES 2002Do It Yourself (1/2)Plane and Sketch.3 (1-, 2-)Middle points (4-)Sketch.4 (3-)1- In the WIREFRAME Open Body create a plane with a 7.2mm distance from the end face of the link.2- On the created plane create an arc of a circle (radius =7.2). Define three coincidences, two between the end points of the arc and the H-axis of the Sketcher and one between the center point of the arc and the V-axis of the Sketcher.3- On the bottom face of the head, create an arc passing through the two vertices of the face (radius =24). Define four coincidences, two between the arc and the vertices of the bottom face and two between the end points of the arc and the H-axis of the Sketcher.4- Create the middle points of Sketch.3, Sketch.4 and of the edge curve of the link end face.Offset planeLink end faceSketch.3Sketch.4Head bottom faceMiddle pointsPart used: Wrench_body_step2.CATPart40Copyright DASSAULT SYSTEMES 2002Do It Yourself (2/2)P1 users should create the three sections loft in two times.Splines and line (5-, 6-)Symmetry and join (8-, 9-)Lofted surface (7-)5- Create three splines, two passing through the two sets of end points of the three arcs and one passing through the set of middle points created on the three arcs. The three arcs are Sketch.3, Sketch.4 and the edge curve of the link end face. Impose an horizontal tangency to each spline on the link end.6- Create a line normal to the end face to the link (length=20) from Point.1.7- In the SURFACES Open Body create a lofted surface by selecting three sections (Sketch.4, Sketch.3 and the edge curve of the link end face), three guide curves (Spline.2, Spline.3 and Spline.4) and a spine (Line.1).8- Apply a symmetry to the lofted surface with respect to the XY plane. 9- Join the lofted surface and the symmetry. Spline.2Spline.3Spline.4Line.1S1S2S3G1G2G3Spine41Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : Creating the Side Surface of the HeadCreate the side surface of the head by a sweeping a profile.The profile and guide curves are created from the existing curves by projection and re-limited.10 min.42Copyright DASSAULT SYSTEMES 2002Do It Yourself1- In the WIREFRAME Open Body extract with tangency continuity the upper and lower edges of the head..2- Split sketch.4 with the side face of the head.3- In the SURFACES Open Body define the side surface: create a sweep with a profile (Split.1=sketch.4 split) and two guide curves (Extract.1 and Extract.2).Part used: Wrench_body_step3.CATPartExtracted edgesSide face of the headSplit of Sketch.4Side surface43Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : Creating a Connecting SurfaceCreate a connect surface at a junction by sketching the profile and revolving it.10 min.44Copyright DASSAULT SYSTEMES 2002Do It Yourself1- In the WIREFRAME Open Body sketch the fillet profile on XY plane. - activate the option Construction elements. - create lines on the bottom and top horizontal edges and on the vertical edge of the link by intersecting the 3D elements. - define two coincidences between the profile and the bottom horizontal edge and between the profile and the vertical edge, two horizontal tangencies at the ends of the profile and two radius constraints (18mm and 5 mm).2- In the SURFACES Open Body create the surface by revolving Sketch. 5 around the horizontal axis of Sketch.1 (360deg).Sketch. 5Sketch.5 (1-)Surface of revolution (2-)Part used: Wrench_body_step4.CATPart45Copyright DASSAULT SYSTEMES 2002ExerciseWrench body : Completing the Wrench BodyCreate solids by extruding and closing the surfaces.Remove the exceeding solid by pocketing.5 min.46Copyright DASSAULT SYSTEMES 2002Do It Yourself (1/2)Sweep.1PartBody1Thick / Mirror / Close (2-, 3-, 4-)Revolute.1Revolute.2Join.11- Exit the Wireframe and Surface Design workbench and enter the Part Design workbench.2- Thick the surface Sweep.1 by 1.5 mm inwards.3- Mirror the PartBody.4- Close the surfaces Revolute.1, Revolute.2 and Join. 1.Initial PartPart used: Wrench_body_step5.CATPart47Copyright DASSAULT SYSTEMES 2002Do It Yourself (2/2)5- Sketch two rectangular contours on the XY plane and build four coincidences, two between the contours and the V-axis of the Sketcher and two between the contours and the corresponding horizontal edge of the head.6- Remove the exceeding solid by pocketing (depth=20mm, Mirrored extent).Sketch.6 (5-)Pocket (6-)48Copyright DASSAULT SYSTEMES 2002。