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Mechanical Engineering Technology

MEC 1012

MEC 1012 - Design Communication II, Challenge 3
SkillsUSA 2005 Practical Exam

Each student must earn a passing grade on all challenges to earn a passing grade in the course.


        Reference the Vermont SkillsUSA Mechanical CADD Competition 2005 Practical Exam handout.

1.      On the BASE do not presume that the conical wall is a constant thickness, but note that the height of 13 counts for both an internal shelf and an outside crease.

2.      On cast parts (1 and 2) note that all cast radii are R1. Also, ignore draft and multistage documentation.

        Item 4 was a bonus for the competitors, but it’s required for you.

1.      Model all 20 BASIC sizes at 20 mm. On your drawing use general dimensions on these 20 mm sizes, then right mouse/Tolerance… and choose ‘Limits/Fits – Show size limits’ (second to last in list). Next, choose the appropriate tolerance for hole or shaft (where uppercase letters designate holes and lowercase designate shafts).

2.      Where dimensions are shown with a specific tolerance you should do the same (as in Part 4’s O.D. and Part 5’s I. D.).

3.      All other sizes may be toleranced with a general note.

        Your documentation must adhere to the standards of completeness and quality outlined in Priorities 1 and 2 of the MEC 1011 Final Project


        Produce a complete set of working drawings using Autodesk Inventor. Set up and use an Inventor project file in V:\MEC\1012\Spring_05\Challenge3\TXA\username. Use A-size portrait or B-size landscape sheets.

        Turn in a paper package (stapled top left) consisting of:

a.      The handout

b.      Set of working drawings (printed 1:1 with drawing scale of your choice. Fold B-size pages accordion style).