STATE UNIVERSITY OF NEW YORK AT BUFFALO
DEPARTMENT OF MECHANICAL & AEROSPACE ENGINEERING
INTRODUCTION TO ENGINEERING DRAWING
I. COURSE DESCRIPTION:
EAS 150 “Introduction To Engineering Drawing” will provide the student the opportunity to study the following topics: Fundamental principles of orthographic projection theory to provide graphical solutions of Descriptive geometry problems dealing with the spatial relationship of points, lines and planes; Techniques of Technical Sketching; Auxiliary Views; Sectional Views; Dihedral Angles; Design Concepts; A study of Manufacturing Processes, Calculation of Tolerances, Limits and Fits and selected technical terminology required to produce production drawings; Standards and Conventions of size and shape description and Fastener and Thread representation.
II: MAJOR GOALS:
A. To provide the student with a fundamental background in technical drawing and graphics which will enable him/her to work more effectively in the various fields of engineering, where knowledge of sketching, technical drawing and print reading is essential.
B. To create an awareness of, and to provide an understanding of the role that technical drawing and graphics has in our technological society.
C. To develop the students understanding of the principles and concepts of Computer Aided Drawing.
I. MAJOR OBJECTIVES AND EXPECTED OUTCOMES:
A. The student will be able to read, understand and produce Engineering Drawings. To produce these drawing, he/she will be able draw or sketch manually & on a CAD system, a complete Engineering Drawing such that the objects drawn can be manufactured or constructed. In doing so, the student will be able to:
1. Draw an object using orthographic projection.
2. Draw objects using a variety of Sectional Views.
3. Draw objects using Auxiliary Views.
4. Calculate Tolerances including Limits and Fits of mating parts.
5. Prepare a Bill of materials.
6. Dimension a drawing.
7. Prepare an Isometric drawing.
8. Be proficient in the use of reference material.
9. Draw a variety of Threads and Fasteners.
10. Prepare a Unit Type Assembly drawing.
B. On the Computer Aided Drafting System, the student will be able to create an Engineering Drawing quickly and efficiently by performing the following functions and commands:
1. Begin a new drawing and produce a drawing involving straight lines, circles and rectangles.
2. Control the drawing window.
3. Use the Undo and Save commands.
4. Change the Grid and Snap settings and spacing.
5. Understand and use the erase feature.
6. Print or Plot a drawing.
7. Create, Change and assign colors and Line Types to Layers.
8. Understand and use the Fillet, Chamfer, Pan and Zoom commands.
9. Change the shape of a Grid.
10. Create a Template drawing.
11. Move and Copy an object.
12. Create a rectangular & polar Array and change the plot configuration.
13. Draw Arcs in eight different ways.
14. Create Mirror images.
15. Select points with Object Snap, ASNAP and use object snap tracking.
16. Break, shorten and extend objects
17. Understand how to enter, and change text.
18. Understand and use dimensioning features and commands.
19. Be able to use Crosshatch patterns.
IV. EVALUATION CRITERIA:
A. Type of test:
1. Periodic written test (completion, multiple choice and drawing)
2. CAD Lab and assignments. (See CAD lab requirements attached)
3. Final project. (Three phases)
B. See Grading Policy and Procedures attached.
V. COURSE OUTLINE:
1. Course outline
2. Class schedule, exams, projects and due dates. (Attached)
3. Grading policy and procedures
4. Attendance policy
5. Required instruments, supplies and textbooks.
B. A Survey of the Classification of Projections
1. Parallel Projection
2. Inclined Surfaces
C. Fundamental Principles of Orthographic Projection Theory
2. Four dihedral angles of projection
3. Principle planes of projection
4. Folding line notation
5. Axis of motion
7. Principles of orthographic projection
8. Spatial relationships
a. Isometric projection theory
b. Locating a point in space
c. Locating a line in space
d. Locating a plane in space
D. Technical Sketching Unit
1. Techniques of freehand sketching
2. Selected problems to locate points, lines and planes
a. Space diagram
b. Multi-view relationship
E. Instruments and media
1. Basic drawing instruments
2. Media types and sizes
3. Alphabet of lines
5. Drawing reproduction
F. Geometric Constructions
A selection of geometric constructions when graphically describing an object
1. Lettering guides
2. Importance of good lettering
H. Definitions of lines
Terminology defining lines in a two-dimensional space form.
2. Free curve
K. Surfaces of Solids
2. Single curve
3. Double curve
L. Application of the Fundamental Principles of Orthographic Projection
1. Points in space
a. Principle views of a point
b. A point on a line
c. A point on a plane
2. Lines in space
a. Intersecting lines
b. Skew lines
c. Parallel lines
d. Perpendicular lines
e. Line in a plane
f. Plane determination
g. Plane Construction
3. Multi-view projection of solids
a. Basic geometric forms
b. Analysis of the object
c. Selection of views
d. Position of views
e. Basic dimensioning practices
f. Visibility of lines
4. Primary Auxiliary Views (Application)
a. Find the true length of a line
b. Find the point view of a line
c. Find the edge view of a line
d. Find the true size and shape of a plane
e. Find the slope of a line
5. Working Drawings
a. Detail drawings
b. Working Assembly drawings
c. Assembly drawings (Sub-assemblies)
d. Revision of Detail drawings
e. Drawing numbers
g. General notes
6. Basic Machine Processes
a. Types of machined holes
b. Common stock forms
c. Fillets and rounds
d. Manufacturing processes
7. Basic Dimensioning Standards
a. Dimensioning Techniques
b. Contour Dimensioning
c. Location dimensions
d. Superfluous dimensions
e. General and local notes
f. Dimension Standards
a. Definition of terms
b. Basic Hole and Shaft System
c. Calculation of Limits and Fits
d. Use of tables and reference material
e. Tolerance Dimensioning
9. Standards and Conventions of Sectioning
a. Lines in Section
b. Cutting Plane Line
c. Line of Sight
e. Full, Half, Broken Out, Revolved, Removed, Offset, Aligned and
10. Threads / Fastener Representation
a. Definition of Terms
b. Screw Thread Forms
c. Thread Symbols
d. Thread Notes
e. Bolts, Studs, Screws
f. Machine Screws, Cap Screws
11. CAD “Computer Aided Design”
a. Lab Requirements
c. Detailed Tutorial Instructions
d. Coordinate System, Limits, Units – Drawing Set-up
e. Basic Drawing Commands
CAD LAB REQUIREMENTS
TO RECEIVE CREDIT FOR THIS COURSE, IN ADDITION TO THE DRAWING, SKETCHING AND EXAM REQUIREMENTS, YOU MUST BE REGISTERED IN A CAD LAB. YOU ARE EXPECTED TO PARTICIPATE IN THE LAB FOR TWO HOURS PER WEEK AND COMPLETE THE FIVE CAD LAB ASSIGNMENTS.
THE STUDENT LAB MANUAL MAY BE PURCHASED AT THE UNIVERSITY BOOKSTORE. I SUGGEST YOU DO NOT BORROW A USED MANUAL. THEY ARE REVISED EACH SEMESTER TO MAKE SUBTLE CHANGES AND UPDATE THE ASSIGNMENTS.
DUE DATES: SEE CLASS SCHEDULE HANDOUT FOR CAD LAB DUE DATES.
CAD ASSIGNMENTS ARE TO BE TURNED IN TO ME DURING THE LECTURE CLASS OF THAT DATE, OR SOONER. IN ADDITION, YOUR ACCOUNT “ID” MUST BE AT THE BOTTOM LEFT HAND SIDE OF YOUR DRAWING AND APPEAR SOMETHING LIKE THIS; /eng/home/dipirro/eas150/project2.feb.14, 2001 12:59:37.
I WILL NOT ACCEPT A CAD DRAWING WITHOUT YOUR “ID” .
THERE IS NO ACCEPTABLE EXCUSE FOR A LATE CAD LAB ASSIGNMENT. ENGINEERS REALIZE THAT THEY MUST PLAN AHEAD AND NOT WAIT UNTIL THE LAST MINUTE TO GET A TASK ACCOMPLISHED. EXAMPLE: IF YOU PLAN ON RUNNING YOUR PLOT ON THE DATE THE DRAWING IS DUE, THE PLOTTER/PRINTER WILL PROBABLY BREAK DOWN. THIS IS NOT A VALID EXCUSE AND THE DRAWING WILL BE GRADED AS LATE.
GRADING POLICY AND PROCEDURES
Plus/minus grades with corresponding quality point values will be assigned on all drawing and sketching assignments where applicable.
A = 4.0
A- = 3.67
B+ = 3.33
B = 3.00
B- = 2.67
C+ = 2.33
C = 2.00
C- = 1.67
D+ = 1.33
D = 1.00
F = 0.00
I = -1.00 (Incomplete)
Final Grade will be calculated as follows:
10% CAD Lab requirements, participation and assignments
30% Final exam/project
There will be four examinations given. I will drop the lowest grade and calculate the final grade using the highest three. Therefore, there will be no make-up exams for any reason, so please do not ask.
It is expected that all assignments will be completed, although all will not be collected. Every assignment will be reviewed at the beginning of the next class. Assignments that are to be collected and graded are expected to be turned in by the due date announced in class. Assignments turned in late will have one letter grade deducted for each class day it is late.