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PSU METBD 110 - Pictorial Sketching

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Chapter 6 – Pictorial SketchingSlide 2Projection SystemsMultiview vs Axonometric ProjectionOverviewExploded Isometric AssemblyAxonometric ProjectionsIsometric Projection vs. SketchStep by Step: Isometric SketchingAxis, Views and DimensionsSlide 11Slide 12Hidden LinesAxis: 1st Position VS 2nd PositionSolid Modeling DemoExampleLocating FeaturesPlotting PointsSlide 19Slide 20Slide 21Slide 22Slide 23Slide 24Slide 25Inclined Surfaces in IsometricLocating on a Non-isometric PlaneComplete the IsometricSlide 29Sketching1Chapter 6 – Pictorial Sketching Print handoutsSelect File, PrintEdit the following selections to read:Select the OK button2Chapter 6 – Pictorial SketchingProjection Systems Page 1694Multiview vs Axonometric Projection Page 170, Figure 6.25OverviewPrevious discussion centered on multiview drawings -2D orthographic projections (Chap 5)Focus now on pictorial drawings which look more like pictures than a multiview drawing (3D).–Easier to visualize design–Sometimes added to multiview drawing for clarification–Good for marketing, shows assembly, inspect fits, conceptual ideas–Not good for dimensioning/manufacturing (can’t show detail)Exploded Isometric AssemblyIsometric drawings are frequently used to show how parts assemble as in this automobile power module.7Axonometric ProjectionsWe will focus on isometric sketching.–Note, all angles are equal, and all line segments are equal (cube)Page 154Isometric Projection vs. SketchIsometric projections are foreshortened because the object is tipped with respect to the viewing plane. Isometric sketches, or drawings, are not usually foreshortened because they still appear proportionate when showing the dimensions full size along isometric axis lines. It is easier just to sketch the full dimension.Page 155Step by Step: Isometric SketchingPage 15610Axis, Views and DimensionsViews?TopTopFrontFrontR SideR SideAxis?3D - Isometric2D - Orthographic11Axis, Views and DimensionsViews?TopTopFrontFrontR SideR SideAxis?3D - Isometric2D - Orthographic12Axis, Views and DimensionsViews?TopTopFrontFrontR SideR SideAxis?Dimensions?WidthHeightDepthWDH3D - Isometric2D - OrthographicIsometric LineIsometric PlaneHidden LinesHidden lines are not usually shown in isometric sketches unless they are needed to show a feature that would be unclear.Usually the orientation for the isometric drawing should be chosen so that hidden lines aren’t needed.Holes are assumed to go completely through the object unless their depth is indicated with a note or with hidden lines.14Axis: 1st Position VS 2nd Position1st Position2nd PositionWHDWHD1. Box in overall dimensions.2. Which view is most descriptive? Sketch as much of it as you can.Isometric LinesNon-isometric LineNon-isometric PlaneIsometric Plane15Solid Modeling DemoPro/ENGINEER (planes)16Example¼” GRIDLocating FeaturesTo locate a feature such as the upper block, make measurements from an existing corner as shown here.Page 15818Plotting Points3 42 1 2, 3, 1,41, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1: 0, 0, 0W, H, D0, 0, 00, 0, 01.5, 1.5, .519Plotting Points3 42 1 2, 3, 4, 11, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1:0, 0, 00, 0, 00, 0, 02Point 2:1 .5, 1.5, .51.5, 1.5, .520Plotting Points3 42 1 2, 3, 4, 11, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1:0, 0, 00, 0, 00, 0, 02Point 2:143Point 3: .5, 1.5, .51.5, 1.5, .51.5, 1.5, 1Point 4: .5, 1.5, 121Plotting Points3 42 1 2, 3, 1,41, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1:0, 0, 00, 0, 00, 0, 02Point 2:143Point 1’: .5, 1.5, .51.5, 1.5, .5 .5, 2, .5Point 4’: .5, 2, 11’, , 1’, 4’1’4’ 4’22Plotting Points3 42 1 2, 3, 4, 11, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1:0, 0, 00, 0, 00, 0, 02Point 2:143Point 2’: .5, 1.5, .51.5, 1.5, .5 1.5, 2, .5Point 3’: 1.5, 2, 11’, 4’, 1’, 4’1’4’3’2’, 2’, 3’2’, 3’23Plotting Points3 42 1 2, 3, 4, 11, 2 4, 31. Number the plane you want to locate.2. Number the plane in the other views.3. Locate the plane in the isometric view point by point.Point 1:0, 0, 00, 0, 00, 0, 02Point 2:14Point 2’: .5, 1.5, .51.5, 1.5, .5 1.5, 2, .5Point 3’: 1.5, 2, 11’, 4’, 1’, 4’1’4’3’2’, 2’, 3’2’, 3’24Plotting Points1. Number points.2. Locate axis (0,0,0) (W,H,D)3. Locate each point.13 23’2’ 1’3, 3’12, 2’1, 1’233’2’1’4. Connect points.Point 1?.75, 2, 0Point 2?Point 3?1.5, 1.25, 01.5, 2, 0Points 1,’, 2’, & 3’?5. Darken appropriate lines.25Plotting Points1. Number points.2. Locate axis (0,0,0) (W,H,D)3. Locate each point.13 23’2’ 1’3, 3’12, 2’1, 1’233’2’1’4. Connect points.Point 1?.75, 2, 0Point 2?Point 3?1.5, 1.25, 02.25, 2, 0Points 1,’, 2’, & 3’?5. Darken appropriate lines.Inclined Surfaces in IsometricInclined surfaces can not be measured along inclined lines in an isometric sketch. To locate inclined surfaces you must make measurements along the isometric axis lines.Page 15727Locating on a Non-isometric Plane1111Locate the center of the circle.Point 1 coordinates?.5, 1.0625, .7528Complete the Isometric2 31 42, 31, 43 42 12134Point 1:0, 0, .625Point 2:.625, .5, 1.375Point 3:.625, ..5, 625Point 4:0, 0, .1.37529Complete the Isometric2 3• 42, 31, 43 42 12134Point 1:0, 0, .625Point 2:.625, .5, 1.375Point 3:.625, .5, 625Point 4:0, 0, .1.37530SketchingLightly show all construction lines (or you will loose


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