Lesson Title:
Introduction to CAD 3
Week
2 /

National Education Standards

Math: ratios
Day
6 / Science: simple machines: Levers
Technology: Visualization and CAD

Introduction:

In this lesson, students will learn to assemble individual components into an assembly of multiple parts.

This will be accomplished in two phases:

1.)  CAD assembly skills will be developed by following the tutorials on pages 1-41 through 1-64 of SolidWorks CAD tutorial.

2.)  Students will then use these skills to assemble the “See Saw” lever system used in the trebuchet throwing arm.

This lesson provides an excellent opportunity for the introduction of the physics of simple machines and the operation of levers.

Objective:

Students who complete this lesson will:

1.)  Complete the Linkage Assembly Solid Works CAD Tutorial

2.)  Create See Saw Tutorial Assembly

3.)  Explain and demonstrate the effect of balanced and unbalanced forces acting on a lever system.

Terms:

Theoretical Mechanical Advantage / Actual Mechanical advantage / Fulcrum

Materials:

SolidWorks CAD tutorial. / Lever Slide Show / Area Power Point Show
Perimeter and Area Work Sheet

Lesson Text:

The step by step CAD tutorials for the creation of the shaft collar are covered in tutorials on pages 1-41 through 1-64 of SolidWorks CAD tutorial.

A LEVERS Slide Shows describing lever types and mechanical advantage is available here.

Lever slide show

Activities:

Suggested Activities

Create a 2D Orthographic of the shaft collar with dimensions

Using a 3D Solid Modeling Program, sketch and extrude a shaft collar.

Calculate the volume of the shaft collar

Calculate the surface area of the shaft collar

Use the CAD program to calculate the Mass Properties (Volume and density) of the object.

Worksheets:

Resources:

Solid Works Step by Step Introductory Manual

Free Solid Works CAD Tutorial by David and Marie Planchard

Coordinates Fact Sheet

Graph Paper Generator makes ISO grid paper for sketching 2D and Isometric

Graph Paper Download

Assessment:

Based on the successful completion of worksheets, and CAD assignments. Note: Be certain to preserve all your worksheets, assignments etc in chronological order in your notebook.