3D CAD What you need to know…

Main areas of CAD Modelling Techniques Modelling Edits Assembly Materials &Environment Use of Models File Types Basic Terms

Modelling Techniques NationalHigherAdv Higher Extrude –Subtract Revolve Extrude –Subtract, Add, Intersect Revolve Loft Extrude Along a Path Helix Extrude –Subtract, Add, Intersect Revolve Loft Extrude Along a Path Helix

Modelling Techniques Challenge All of the modelling techniques required of an Adv Higher student have been used to create this Spaceship. Identify where they have been used.

Modelling Techniques Challenge

Modelling Techniques Challenge Answers Extrude Union Revolve Loft Extrude Subtract Helix

Modelling Edits NationalHigherAdv Higher Fillet Chamfer Shell Fillet Chamfer Shell Radial Array Linear Array Irregular Fillet Irregular Chamfer Fillet Chamfer Shell Radial Array Linear Array Irregular Fillet Irregular Chamfer

Modelling Edits Challenge Use Modelling to create the following objects in Inventor.

Assembly NationalHigherAdv Higher Assembly Component Align Centre Axis Mate Assembly Component Align Centre Axis Mate Bottom Up Top Down Sub-Assembly Assembly Component Align Centre Axis Mate Bottom Up Top Down Sub-Assembly STEP/IGES

Assembly Challenge Using the components in the file. Assemble the shelving unit and provide a detailed modelling story board using the correct constraining methods. Shared > Design & Tech > Adv Higher > Assembly Modelling Exercises Start with the Top. Remember you can use other tools to support you in completing the model.

Assembly Challenge Answer I used centre align to line up the dowels and then mate to position it them the correct depth in the hole. To position the side I used align and mate. I used align the faces to line up the front edge and side with the top and then mate to join them together. To position the dowels for the shelf I had to change their orientation using by aligning the centre axis and then used mate to join the flat of the dowel with the depth of the hole. I had to change the orientation of the shelf and I used mate and align to position the shelf. I used mate to join the side surface of the shelf to the side surface of the side and align to bring it into alignment with the front of the side. Extra command I used to help me complete the project more efficiently were: Rectangular pattern and mirror.

Materials & Environment NationalHigherAdv Higher Materials Reflection Light Source Sited Environment Materials Reflection Texture Mapping Bump Mapping Specularity Image Based Lighting High Dynamic Range Imagery Volumetrics Virtual Reality Modelling Language

Models NationalHigherAdv Higher Solid Model Wireframe Solid Model Wireframe CFD FEA

File Types NationalHigherAdv Higher STL – Standard Tessellation Language DXF – Direct Exchange Format DWG – Drawing Format VRML – Virtual Reality Modelling Language 3DS – 3D Studio STP - Step

Basic Terms NationalHigherAdv Higher CAD Library Sketch Profile CAD Library Sketch Profile Work Plane Fixed Vertices Edge Faces Axis Datum Modelling Tree Suppress CAM CAD Library Sketch Profile Work Plane Fixed Vertices Edge Faces Axis Datum Modelling Tree Suppress CAM Tool Path Generator