ME 363

PRINCIPLES AND PRACTICE OF COMPUTER AIDED DESIGN

Fall 2014

INSTRUCTOR:

Dr. Ming C. Leu, Keith and Pat Bailey Distinguished Professor

Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla MO

Office: 321 Engineering Research Lab

Phone: 573-341-4482, e-mail:

Office Hours: TBD

LECTURES:

M & W: 11:00AM-11:50AM, 260 Toomey Hall

LAB SESSIONS:

Lab A: M 1:00PM-1:50PM, 213 Butler-Carlton Hall

2:00PM-2:50PM, 200 Toomey Hall

Lab B: W 1:00PM-2:50PM, 200 Toomey Hall

PREREQUISITES:

Math 22, Cmp Sc 53 or 73 or 74, Mc Eng 161

REFERENCE BOOK:

Mastering CAD/CAM, by Ibrahim Zeid, McGraw Hill, 2005.

SUPPLEMENTAL MATERIALS:

PowerPoint slides used in the presentation will be provided. Lab handouts will include an NX9 for Engineering Design Manual, a SolidWorks Tutorial, and a MATLAB Guide. These materials will be made available electronically.

COURSE DESCRIPTION:

This course covers the principles and practice of computer-aided design with emphasis on geometric modeling of curves, surfaces and solids, including the underlying mathematical representations. The lectures include introduction to digital design and manufacturing; representation of curves; representation of surfaces; representation of solids; CAD/CAM data exchange, and computer graphics. In the lab session, the commercial CAD/CAM packages of NX9 and SolidWorks will be used to provide students with practical experiences through exercises on features creation, sketching, drafting, solid modeling, freeform modeling, assembly modeling, and finite element analysis. These exercises will also help students grasp the fundamental materials taught in the lectures. The students will also write programs in Matlab to create freeform curves and surfaces using the mathematical representations taught in the class.

GRADING:

Problem Sets 15%

Lab Projects 20%

Final Project 15%

Mid-term Exam 20%

Final Exam 30%

NOTES:

1. On-campus students are required to attend every class, and class attendance will be recorded from time to time. Distance students are not required to attend the class in real time; they will have access to archival lectures and lab instructions, which will be accessible on the web via Missouri S&T’s Video Communications Center.

2. For on-campus students, completed homework assignments must be submitted to Dr. Leu at the beginning of the class on the due date and completed project assignments must be submitted to the mailbox of the teaching assistant by 4:00 PM on the due date. Distance students should have their completed homework and project assignments scanned into PDF files and submit them electronically by the due dates & times set for on-campus students.

3. All the homework and lab project assignments must be submitted in time. Late turn-in of these assignments will not be accepted unless you have special events (e.g., a distance student on an assignment abroad for two weeks) that prevent you from submitting them in time, which must be communicated beforehand, or you have a documented emergency (e.g., from a medical doctor to prove your illness).

4. There are CLC machines available for distant students to access software remotely for their classes. The instructions are provided online:http://vcc.mst.edu/stus/itinfo/.The students can click on vmware instructions for PC or mac link to know how to access the software.

LECTURE COVERAGE

1.  Introduction to Digital Design and Manufacturing

·  The engineering design process

·  CAD/CAM concept and applications

·  Virtual reality (ideas, devices, applications)

·  Rapid prototyping and manufacturing

·  From CAX to digital enterprise

2.  Representation of Curves

·  Analytic curves (line, circle, ellipse, parabola, hyperbola)

·  Synthetic curves (cubic spline, Bezier, B-spline)

·  Manipulation of curves (segmentation, trimming, blending)

3.  Representation of Surfaces

·  Analytic surfaces (plane, cylinder, sphere)

·  Synthetic surfaces (ruled, revolute, bicubic spline, Bezier, B-spline, Coons)

·  Manipulation of surfaces (segmentation, trimming, blending, offsetting)

4.  Representation of Solids

·  Set operations

·  Constructed solid geometry

·  Boundary representation

·  Other solid modeling methods (sweep, dexel, voxel, parametric solid, etc.)

5.  CAD/CAM Data Exchange

·  Data types and exchange methods (direct, indirect)

·  Neutral data exchange formats: IGES, PDES, STL

6.  Computer Graphics

·  Projections (parallel, perspective, orthographic, oblique, isometric, etc.)

·  Coordinate transformations (translation, rotation, scaling, reflection)

·  Mathematics of projections

·  Shading and smoothing

LAB SESSION WEEKLY SCHEDULE

Note: This schedule is flexible and may be modified during the semester as needed.

WEEK / LAB / SELF EXERCISE / DUE DATES
AUGUST 25 / NX - Introduction, Form Features, Feature operations / Block, Cylinder, Cone, Hole, Slot, Pocket, Pad, Boss, Extrude, Revolve, Sweep, Blend, Boolean Operations
SEPTEMBER 1 – LABOR DAY WEEK (No Lab Sessions)
SEPTEMBER 8 / NX – Sketching and Drafting / Sketching and Drafting/Part Practice for Project 1 / PROJECT 1 (Basic) (Sep. 12th)
SEPTEMBER 15 / MATLAB I / Basics and 2D Plots
SEPTEMBER 22 / MATLAB II / 3D Plots and Debugging/ Part Practice for Project 2
SEPTEMBER 29 / NX - Assembly Modeling / Part Practice for Project 2 / PROJECT 2 (Assembly) (Oct. 3rd)
OCTOBER 6 / NX - Freeform Modeling / Modeling of Conics/Splines/Surfaces / FINAL PROJECT PROPOSAL (Oct. 10th)
OCTOBER 13 / NX - Motion Simulation / Motion Simulation/Part Practice for Project 3 / PROJECT 3 (Freeform) (Oct. 17th)
OCTOBER 20 / NX - Finite Element Analysis / Mesh Generation/Analysis for Structural Applications
OCTOBER 27 / SolidWorks / Feature Operations/Sketching/ Drafting and Practice for Project 4 / PROJECT 4 (FEA) (Oct. 31st)
NOVEMBER 3 / SolidWorks / Assembly Modeling
NOVEMBER 10 / SolidWorks / Freeform Modeling and Part Practice for Project 5 / PROJECT 5 (SolidWorks)
(Nov. 14th)
NOVEMBER 17 / CAM in NX / CAM Demo and Completion of Final project
NOVEMBER 24 – THANKSGIVING WEEK (No Lab Sessions)
DECEMBER 1 / VR and AM Lab Demos / Completion of Final project / FINAL PROJECT
(Dec. 5th)
DECEMBER 8 / FINAL PROJECT PRESENTATION (Dec. 8th and Dec. 10th)