Forging new generations of engineers Sketching Multiview Drawings Multiview Drawing A multiview drawing is one that shows two or more two-dimensional views of a three-dimensional object.
Multiview drawings provide the shape description of an object. When combined with dimensions, multiview drawings serve as the main form of communication between designers and manufacturers. Multiview Drawing Width, Depth, and Height
All three-dimensional objects have width, height, and depth. Width is associated with an objects sideto-side dimension. Height is the measure of an object from top-to-bottom. Depth is associated with front-to-back distance. Width, Depth, and Height
Width, Depth, and Height 45 Orthographic Projection Orthographic projection is a technique that is used to create multiview drawings.
Orthographic projection is any projection of the features of an object onto an imaginary plane of projection. The projection of the features of the object is made by lines of sight that are perpendicular to the plane of projection. Orthographic Projection The best way to
understand orthographic projection is to imagine an object contained inside a glass box. Orthographic Projection There is a total of
six glass walls surrounding the object. Each wall represents a projection plane onto which a twodimensional object view will be created. Projection Plane
A projection plane, also referred to as a plane of projection or picture plane, is an imaginary surface that exists between the viewer and the object. The projection plane is the surface onto which a two-dimensional view of a threedimensional object is projected and created. Orthographic Projection
Start by focusing only on the front projection plane. A person standing in front of the object would see only the five corners identified in black.
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e lin 90 a ction at proje to ne pla 4 5
Orthographic Projection Projection lines are used to project each corner outward until they reach the projection plane. Projection Lines A projection line is an imaginary line that
is used to locate or project the corners, edges, and features of a three-dimensional object onto an imaginary two-dimensional surface. Orthographic Projection The visible edges of the object are then identified on
the projection plane by connecting the projected corners with object lines. Orthographic Projection The orthographic projection
process is then repeated on the other projection planes. Sketching a Multiview Drawing Given the overall dimensions of the object, a pencil, and a
sheet of graph paper, a sketching multiview drawing can be easily done using points, construction lines, and object lines. Sketching a Multiview Drawing Step #1: Calculate the amount of space that
the views will take up. Calculating Required Space 12 space s 18
Sketching a Multiview Drawing Step #1: Calculate the amount of space that the views will take up. Step #2: Layout the boxes within which the individual views will occur using points and construction lines. Construction Line Layout
Sketching a Multiview Drawing Step #1: Calculate the amount of space that the views will take up. Step #2: Layout the boxes within which the individual views will occur using points and construction lines. Step #3: Identify the visible edges by drawing object lines on top of the construction lines.
Object Line Layout A Question Each of the blocks at right has the same overall dimensions and
color. What else do they have in common? A Question Each of the blocks at right has the all
same They have overall identical top dimensions and views! color. What else do they have in
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