Engineering Drawing ME 250:Design Manufacturing I School of Mechanical Engineering Shanghai Jiao Tong University 1
Shanghai Jiao Tong University 1 Engineering Drawing ME 250: Design & Manufacturing I School of Mechanical Engineering
Course Outline Descriptive Geometry Spatial Visualization Orthographic Projection -Auxiliary Views Engineering Drawing Shanghai Jiao Tong University 2
Shanghai Jiao Tong University 2 Course Outline n Descriptive Geometry n Spatial Visualization n Orthographic Projection n Auxiliary Views n Engineering Drawing
Descriptive Geometry What is Descriptive Geometry Descriptive geometry is the use of orthographic projections in order to solve for advanced technical data involving the spatial relationships of points,lines,planes and solid shapes. Shanghai Jiao Tong University 3
Shanghai Jiao Tong University 3 Descriptive Geometry n What is Descriptive Geometry ? n Descriptive geometry is the use of orthographic projections in order to solve for advanced technical data involving the spatial relationships of points, lines, planes and solid shapes
Descriptive Geometry Why do I need to understand it With the advent of CAD software,computers are routinely being used to design and illustrate many projects which were formerly hand drawn.This (relatively)new technology eliminates the need for hand completed drawings but still requires the engineer(or artist)to be well versed in the theory and practice of multiview(or orthographic projection) 3-D Spatial visualization is a very powerful tool Shanghai Jiao Tong University 4
Shanghai Jiao Tong University 4 Descriptive Geometry n Why do I need to understand it ? n With the advent of CAD software, computers are routinely being used to design and illustrate many projects which were formerly hand drawn. This (relatively) new technology eliminates the need for hand completed drawings but still requires the engineer (or artist) to be well versed in the theory and practice of multiview (or orthographic projection) n 3-D Spatial visualization is a very powerful tool
Descriptive Geometry Engineers (and others)often use two- dimensional pictures to communicate three-dimensional shapes.The most common way to represent a three- dimensional object in a two-dimensional plane is by orthogonal projection. Shanghai Jiao Tong University 5
Shanghai Jiao Tong University 5 Descriptive Geometry n Engineers (and others) often use two- dimensional pictures to communicate three-dimensional shapes. The most common way to represent a three- dimensional object in a two-dimensional plane is by orthogonal projection