autocad tutor solidmodel

1 AutoCAD Tutorial Learning Objectives: - To refresh your memories in operating AutoCAD - To practice on constructing solid model www.siit.tu.ac.th/karndee/course/autocad.html 2 3D Modeling Basics  Wireframe models  Surface models  Solid models 3 Wireframe Model  Represents edge of actual object  Surfaces of object are not defined  Transparency and no volume  2D objects in 3D space  Use Line, Circle, Arc 4 Surface Model  Edges and surfaces are defined  Object has volume but no mass  Each surface is constructed individually  Each surface is created / move to the correct orientation w.r.t other surfaces  Easier to visualize than wireframe  Can be displayed in wireframe or hidden view   Draw / Surfaces…  Command: _hide 5 Solid Model  A complete computerized replica of the actual object  Complete surfaces, edges, interior features of the object  Object has volume and mass  Can be displayed in wireframe or hidden view  Constructing primitive shapes Using Boolean operations to create composite solid 6 Constructive Solid Geometry (CSG) Techniques Primitive Solids  Draw / Solids…  Box  Cone  Cylinder  Extrude  Revolve  Sphere  Torus  Wedge Boolean Operations  Modify / Solid Editing …  Union  Joins selected solids  Subtract  Subtract one set of solids from another  Intersect  Create a solid of intersection (common volume) from the selected solids + 7 Part Sample (to be used in CAM section) SW Isometric View 8 Part Sample (to be used in CAM section) Top View 9 Common Operations Drawing Environments  Metric unit orientation  Set the drawing limit  Set isometric viewpoint Primitive Solids and 2D Object  Solid boxes  Cylinders  Rectangular Object Modification  Fillet  Extrude  Subtract  Union  Move Dimensioning 10 Step 0: Setup the environment  Set the environment at start up  Metric setting  Viewing in 3D  View / 3D Views / SW Isometric  Select common operations from Toolbar  View / Toolbars …  Select Solid Editing, View Point, Object Snap, Modify, . 1 AutoCAD Tutorial Learning Objectives: - To refresh your memories in operating AutoCAD - To practice on constructing solid model www.siit.tu.ac.th/karndee/course /autocad. html 2 3D