5MultiviewDrawings5MultiviewDrawings Explain the relationship between an orthographicprojection and a multiview drawing. Explain three visualization principles for multiviewdrawings. Identify and define the three dimensions of anobject. Define the three regular views.Permission granted to reproduce for educational use only. Explain the relationship between an orthographicprojection and a multiview drawing. Explain three visualization principles for multiviewdrawings. Identify and define the three dimensions of anobject. Define the three regular views. Identify three principal planes of projection. Identify the three types of flat surfaces. Explain characteristics of cylindrical surfaces. Explain characteristics of fillets, rounds, andrunouts. Identify differences between third-angle and first-angle projection.Permission granted to reproduce for educational use only. Identify three principal planes of projection. Identify the three types of flat surfaces. Explain characteristics of cylindrical surfaces. Explain characteristics of fillets, rounds, andrunouts. Identify differences between third-angle and first-angle projection.Orthographic Projection Created by projecting the points of a three-dimensional object onto a two-dimensional planePermission granted to reproduce for educational use only.Multiview Projection Orthographic projection consistingofsystematically arranged views to describe anobjectPermission granted to reproduce for educational use only.Definition Summary Orthographic projection, multiview projection, andmultiview drawing are interchangeable terms Represents the main type of drawing views usedin industrial printsPermission granted to reproduce for educational use only.Selection of Views Six normal views: Front Back Top Bottom Right side Left sidePermission granted to reproduce for educational use only. Six normal views: Front Back Top Bottom Right side Left sideSelection of Views Three regular views commonly used ineducation: Front Top Right sidePermission granted to reproduce for educational use only. Three regular views commonly used ineducation: Front Top Right sideSelection of ViewsPermission granted to reproduce for educational use only.Dimensions of an Object Height is how tall the object is, as measured onthe front view Width is how wide the object is, as measured onthe front view Depth is how deep the object is from front to back Each dimension appears twice in the three regularviews Length and breadth are terms not usedPermission granted to reproduce for educational use only. Height is how tall the object is, as measured onthe front view Width is how wide the object is, as measured onthe front view Depth is how deep the object is from front to back Each dimension appears twice in the three regularviews Length and breadth are terms not usedDimensions of an ObjectPermission granted to reproduce for educational use only.Three Orientation Possibilities Perpendicular Parallel InclinedPermission granted to reproduce for educational use only.Three Projection Possibilities Edge view True size and shape Foreshortened shapePermission granted to reproduce for educational use only.Three Principal Planes of Projection Frontal plane Horizontal plane Profile planePermission granted to reproduce for educational use only.Three Types of Flat Surfaces NormalPermission granted to reproduce for educational use only.Three Types of Flat Surfaces InclinedPermission granted to reproduce for educational use only.Three Types of Flat Surfaces ObliquePermission granted to reproduce for educational use only.Cylindrical and Curved SurfacesPermission granted to reproduce for educational use only.Meanings of a Multiview Line AEdge view of a flator curved surface BIntersection of twosurfaces (just an edge) CMaximum contourof a curved surfacePermission granted to reproduce for educational use only. AEdge view of a flator curved surface BIntersection of twosurfaces (just an edge) CMaximum contourof a curved surfaceFirst-Angle and Third-AngleProjection Dividing space into quadrants Historical development of projection theory used twoplanes to divide space After projections, the two planes are revolved into one,with quadrants two and four collapsedPermission granted to reproduce for educational use only. Dividing space into quadrants Historical development of projection theory used twoplanes to divide space After projections, the two planes are revolved into one,with quadrants two and four collapsedFirst-Angle and Third-AngleProjectionPermission granted to reproduce for educational use only.Third-Angle Projection Used in the United StatesPermission granted to reproduce for educational use only.First-Angle Projection Used in EuropePermission granted to reproduce for educational use only.Permission granted to reproduce for educational use only. What is the relationship between orthographicprojection and a multiview drawing?Each view in a multiview drawing is based onorthographic projectionPermission granted to reproduce for educational use only.Each view in a multiview drawing is based onorthographic projection What are the three basic dimensions of anyobject?Height, width, and depthPermission granted to reproduce for educational use only.Height, width, and depth What are the three regular views on a multiviewdrawing?Front, top, and right sidePermission granted to reproduce for educational use only.Front, top, and right side What are the three principal planes of projection?Frontal, horizontal, and profilePermission granted to reproduce for educational use only.Frontal, horizontal, and profile Briefly describe the three visualization principlesfor multiview drawings.Principle One: A flat surface is orientedperpendicular, parallel, or inclined to a plane ofprojection.Principle Two: All flat surfaces appear as eithera line, true size and shape, or foreshortened.Principle Three: All surfaces appear in everyview.Permission granted to reproduce for educational use only.Principle One: A flat surface is orientedperpendicular, parallel, or inclined to a plane ofprojection.Principle Two: All flat surfaces appear as eithera line, true size and shape, or foreshortened.Principle Three: All surfaces appear in everyview. What are the three types of flat surfaces?Normal, inclined, and obliquePermission granted to reproduce for educational use only.Normal, inclined, and oblique Briefly explain the characteristics of cylindricalsurfaces in multiview drawings.Cylindrical surfaces are made up of thousandsof elements. If a flat surface is tangent to thecylindrical surface, no line appears at theelement of tangency.Permission granted to reproduce for educational use only.Cylindrical surfaces are made up of thousandsof elements. If a flat surface is tangent to thecylindrical surface, no line appears at theelement of tangency. Explain characteristics of fillets, rounds, andrunouts.Fillets are interior rounded edges. Rounds areexterior rounded edges. A line may be shownin projection for fillets and rounds if neededfor clarity. Runouts occur when a roundedcorner intersects a curved surface and theedge tails out. Runouts are usuallyrepresented in projection.Permission granted to reproduce for educational use only.Fillets are interior rounded edges. Rounds areexterior rounded edges. A line may be shownin projection for fillets and rounds if neededfor clarity. Runouts occur when a roundedcorner intersects a curved surface and theedge tails out. Runouts are usuallyrepresented in projection. What is the difference between third-angle andfirst-angle projection?In third-angle projection, the object resides inthe third angle of space, resulting in the topview being located above the front view. Infirst-angle projection, the object resides in thefirst angle of space, resulting in the top viewbeing located below the front view.Permission granted to reproduce for educational use only.In third-angle projection, the object resides inthe third angle of space, resulting in the topview being located above the front view. Infirst-angle projection, the object resides in thefirst angle of space, resulting in the top viewbeing located below the front view.