MIME 3300 Design Project 2 11/30/2012

Due 12/7/2012, 5 PM

Please put your project in an envelop,and write your name on it. You can submit it in class or leave it in the box next to my office door (4006D NI).

This project counts as 2 homework assignments.

Study the class notes and the review on gear design posted on the course web page before trying to do this project.

Design a gear set consisting of a pinion and a gear following the AGMA standards. You are given the following information. The angle of action is =200, the diametral pitch is 5, the number of teeth of the gear is 30 and the pitch diameter of the pinion is 3 in.

Specifically follow the steps below and find the requested information:

  1. Find the pitch diameters of the gear and pinion and draw the pitch circles.
  2. Determine and draw the base circles.
  3. Draw the line of action.
  4. Draw the involute curve for each gear. Do not use the template that will be distributed in class or the one posted on the course web page. Draw the involute by considering a cord that is unwrapped from the base circles of the gears.
  5. Calculate the circular pitch.
  6. Determine and draw the addendum and dedendum circles of the pinion and the gear and divide them into N equal segments where N is the number of teeth.
  7. Make a template of a gear using cardboard or plastic. Compare the template with the template of gears in the template distributed in class.
  8. Using the template draw 5-10 teeth of each gear around the pitch point.

Your report should include the following information:

  • Drawings of the gear and pinion, including the base, pitch, addendum and dedendum circles, and the teeth.
  • A detailed description of all the steps you followed, your calculations and the final results for each of the above 8 steps. The equations used in each step should be provided.
  • A detailed description of how you drew the involute profiles of the tooth is required.
  • The template of the tooth.
  • You should submit the above information in a 912 envelop with your name and the submission date on it.

You are encouraged to use a CAD program such as IDEAS, or AutoCAD, or Smart Sketch to draw the various circles. Or you can use a compass, a ruler and a protractor instead.