This lesson plan teaches students how to use parametric constraints within Autodesk Inventor to design scalable models. The model provided here is a sample for students see.
Overview and Background
In my course students learn how to use Autodesk Inventor to create models. In most of the lessons students use exclusively numeric or geometric constraints. In this lesson they learn how to use parametric constraints in order to create models that are easily scalable.
Lesson Plan and Activity
Class with start with a discussion of the various type of constraints we’ve used so far
Assembly: Mate, Flush, Tangent, Insert, Angle
Numeric: Static numbers assigned to a dimension
Geometric: Parallel, Concentric, Equal, etc.
Teacher will present the students with a question. For an object they previously created...what happens if you need to create the same object only smaller (or bigger)? We’ll discuss examples of things that come in multiple sizes (child’s version of a chair, clothing, etc.). This will lead the students to the idea, that there needs to be a simple way to create something scalable. This will introduce students to the concept of parametric constraints: That is using mathematical relationships to control the size and location of geometry.
Teacher will give a demonstration on how to use parametric equations in Autodesk Inventor, building something basic (like a block with a hole in it). Instructor will demonstrate how to scale an object and show common errors that can occur if careful planning is not done.
Students will be given an object to create in Autodesk Inventor and the class will walk through the relationship between the various dimensions of the object. They will then need to recreate the object in Autodesk Inventor and use the “Manage Parameters” table to scale the object up and down.
Day 3 - 4
Students will be tasked with creating their own scalable object, the example will be this set of small stacking baskets. Their completed projects will be printed out.
**** See attached Word Document for screen shots from the lesson and handouts
Students should be extremely comfortable with using the Autodesk Inventor software and familiar with 3D modeling techniques