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DFTG-2302 – Machine Drafting
Houston Community College
Spring 2013
Semester Credit Hours (SCH): 96
Credit Hours: 3
Format: Lecture: 1/3 Lab and/or Web: 2/3
Weekly: 6 hrs. (include Web Enhanced class)
(8 hrs. for 2nd Start term, 9.6 hrs. for Summer term)
For Web-enhanced (WE) class, please see your instructor.
Drafting & Design
Engineering Technology
Northwest College
Syllabus
Instructor:
Prof. Ken Nguyen, BS
Office: Spring Branch campus
Email: ken.nguyen1@hccs.edu
Kenqn1998@sbcglobal.net
DFTG-2302
Machine Drafting
Classes:
 Saturday 8:00-12:00PM
CRN #33164
Revised
Jan24.12
PREREQUISITE: DFTG 1305, DFTG-1333
COURSE DESCRIPTION: Production of detail and assembly drawings of machines, threads, gears, cams, tolerances and limit
dimensioning, surface finishes, and precision drawings.
TEXTBOOK:
“Technical Drawing” by Frederick E. Giesecke, [required]
published by Prentice Hall, Perason Education Inc.
Check with your instructor for the latest Edition
MATERIALS: USB Thump Drive.
COURSE OBJECTIVES: Interpretation of terms used in tolerancing; determine dimensions of two mating parts; draw spur and
bevel gears; and draw set of detail and assembly drawings; define terms used in tolerancing; determine interference and clearances;
specify types of threads forms; interpret thread notes; draw spur, bevel, cam profile; and draw a set of detail and assembly drawings.
1. KNOWLEDGE:
2. SKILLS:
a.
b.
c.
d.
e.
f.
g.
a. understand the requirements of detailed assembly drawings
b. understand the purposes and application of tolerances and tolerance dimensioning
c. understand mechanical components and manufacturing processes
applying tolerance dimensions according to accepted drafting standards
produce detailed drawing sets for complex machine parts
calculate tolerances from Appendix data
convert a cast part into a welded part and apply welding symbols to the part drawing
research and acquire information from vendor catalogs
create an assembly drawing and a BOM (Bill of Materials)
create detailed cam and gear drawings with tolerance notations.
3. ATTITUDES/BEHAVIORS: a. must follow instructions as presented in the classroom
b. must participate as a team member in a machine design process
c. the student must exhibit patience.
LAB REQUIREMENTS: Student can use computer at the labs or at home of his/her choice. The labs to be opened if there is a
class in session. If the lab is being used by other class, student is encouraged to ask the instructor before using the available
computer. Lab assistants, if any, are also available for technical help.
COURSE EVALUATION PROCEDURE: The student will be evaluated and receive a final grade based upon the following
criteria:
 Laboratory work consisting of assigned technical drawing problems.
 A minimum of two tests: (a mid-term and a final examination):
NOTE: Individual instructors may schedule more tests if desired.
 Class and laboratory attendance, active participation in class, professional attitude and growth in terms of
technical skill development and teamwork within the laboratory environment shall be taken into consideration.
Note: Students are required to initial his/her name on the provided form (Green Form) upon showing up to the class.
Revised 6/30/2016
DFTG-2302 – Machine Drafting
GRADING PROCEDURE:
A = 90 –100
B = 80 – 89
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C = 70 – 79
D = 60 – 69
F = below 59
The drawing portion of the above evaluation criteria shall be based on the layout, dimensional accuracy, neatness, and timely
completion.
LATE ASSIGNMENT POLICY: Students are encouraged to turn assignments in on time if at all possible. This allows the
instructor to grade the work, return it to the student and the student use the feedback as a learning tool. Reduction of points could be
applied to late submissions. In general, a minus 5% would be applied to every late week.
MAKE-UP TEST/PROJECT POLICY: The student must request a make-up test and it should be scheduled at the earliest possible
date following the quiz (or mid-term) missed. NO make-up test are given for the final examination.
EXTRA CREDIT: Extra credit work is offered only to assist students that that have a grade range of “D” or “F” at the mid-term
break. This work cannot be substituted for regular assignments and can only raise the final grade to a maximum of a “C”.
PROGRAM ACCESSIBILITY (ADA): The Houston Community College, Drafting and Design Technology Program is
committed to making all aspects of the program accessible to individuals with disabilities. Students with disabilities, as defined by
the American with Disabilities Act (ADA), are required to obtain certification of their impairment through the College ADA
Certification Office. For information contact the front office of the campus.
CLASS ATTENDANCE: You are expected to attend all lecture classes and labs. You are also responsible for all materials
covered in either lecture or lab. In the case of your absence, you must contact the instructor to obtain make-up assignments or
arrange make-up testing, either of which can be distributed at the instructor’s discretion. Class attendance is checked daily.
The instructor has the authority to drop you from the class for excessive absences, that is, you may be dropped from a course after
accumulating absences in excess of 12.5 percent of the total hours of instruction (lecture and lab).
For example: - A 3 credit hour lecture/lab class meeting 6 hours per week – 2 absences (12 hrs.) is 12.5% of the class.
- A 3 credit hour lecture/lab class meeting 3 hours x2 times per week – 4 absences (12 hrs.) is 12.5% of the class.
Administrative drops are at the discretion of the instructor. It is your responsibility to drop a course, should you choose not to
complete it. Failure to withdraw officially will result in you receiving a grade of “F” in the course.
Note: Although it is your responsibility to officially withdraw from a course, it is always a good idea to discuss any attendance problems with your
instructor first. Class attendance is very important, but your instructor may be able to help you catch up. If you become ill or know you are going to
miss class for some reason, tell your instructor as soon as possible.
Departments and programs governed by accreditation or certification standards may have different attendance policies.
RELIGIOUS HOLIDAYS: If you observe a religious holiday and miss class, you must notify your instructor in writing two weeks
in advance to arrange to take a test or make up an assignment. A religious holiday is "a holy day observed by a religion whose place
of worship is exempt from property taxation under Section 11.20, Tax Code."
SCHOLASTIC DISHONESTY: Students are responsible for conducting themselves with honor and integrity in fulfilling course
requirements. College System Officials may initiate penalties and/or disciplinary proceedings against a student accused of scholastic
dishonesty. "Scholastic dishonesty" includes, but is not limited to, cheating on a test, plagiarism, and collusion.
"Cheating" on a test includes:
 Copying from another student's test paper;
 Using materials during a test that are not authorized by the person giving the test;
 Collaborating with another student during a test without authority;
 Knowingly using, buying, selling, stealing, transporting, or soliciting in whole or part the contents of an un-administered
test;
 Bribing another person to obtain a test that is to be administered.
"Plagiarism" means the misuse of another's work and the deliberate incorporation of that work into work you offer for credit.
"Collusion" means the unauthorized collaboration with another person in preparing work offered for credit.
Determination of scholastic dishonesty will be at the discretion of the instructor.
Reference the following web link for additional information: http://northwest.hccs.edu
*The Final Examination Date & Time:
Will be notified by the instructor.
“Notice: Students who repeat a course three or more times may soon face significant tuition/fee increases at HCC and other Texas
public colleges and universities. If you are considering course withdrawal because you are not earning passing grades, confer with
your instructor/counselor as early as possible about your study habits, reading and writing homework, test-taking skills, attendance,
course participation, and opportunities for tutoring or other assistance that might be available.”
EGLS3 -- Evaluation for Greater Learning Student Survey System (since Fall.2011)
At Houston Community College, professors believe that thoughtful student feedback is necessary to improve teaching and learning.
During a designated time, you will be asked to answer a short online survey of research-based questions related to instruction. The
anonymous results of the survey will be made available to your professors and division chairs for continual improvement of
instruction
Revised 6/30/2016
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DFTG-2302 – Machine Drafting
Course Content
Machine Drafting
DFTG 2302
Unit 1: Design & Working Drawings.
At the end of this unit the student should be able to:
1. Understand the various steps in the design and
manufacture of a product.
2. Identify the different types of engineering
drawings used in each phase of the design
and manufacture process.
3. Correctly fill out a standard company title
block for a drawing.
4. Identify and use the various standards and
reference books found in a typical drafting
room.
Unit 2: Dimensioning
At the end of this unit the student should be able to:
1. Draw the necessary views of a part for
manufacture.
2. Apply dimensions according to accepted
drafting standards.
Unit 3: Tolerancing
At the end of this unit the student should be able to:
1. Understanding tolerancing as applied for part
manufacture and assembly.
2. Define the different types of tolerances.
3. Apply tolerances to a machine drawing.
Unit 4: Threads & Fasteners
At the end of this unit the student should be able to:
1. Define terms relating to screw threads.
2. Apply thread notations to drawings according to
ANSI standards.
Unit 5: Assembly Drawings
At the end of this unit the student should be able to:
1. Create an assembly drawing of a machine part.
2. Create a bill of material list.
Unit 6: Gears & Cams
At the end of this unit the student should be able to:
1. Define the different types of gears used.
2. Understand the basic working principle of
gears.
3. Produce a gear drawing.
Unit 7: Manufacturing Processes
At the end of this unit the student should be able to:
1. Understand the different types of manufacturing
process.
2. Define terms relating to manufacturing
processes.
3. Apply welding symbols to a drawing.
4. Understand material specifications and notation
Unit 8: Vendor Data Research
At the end of this unit the student should be able to:
1. Identify the various composite vendor catalogs
for engineering construction materials.
2. Look up information in the catalogs.
Unit 9: Drafting Mathematics
At the end of this unit the student should be able to:
1. Perform basic mathematic calculations typically
used in machine drafting.
Revised 6/30/2016
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DFTG-2302 – Machine Drafting
COURSE SCHEDULE AND ASSIGNMENTS
(16-Week Semester)
WEEK
MATERIAL COVERED
Day 1 Lecture: Introduction
Course Introduction. Discussion of course syllabus, materials
required for course, sources of supplies, class attendance, and
grading system.
ASSIGNMENT
Purchase textbook.
14th Read Chapter 17: Gears and Cams
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Day 1: Midterm
Lecture: Gears & Cams
1. Types of Gears
2. Gear Terminology
2
How to create a Gear Drawing
Lab : Create working drawing of a spur gear from gear data sheet.
Day 1 Lecture: Cams:
14th Read Chapter 17: Cams
1.
Cam Profile Drawing
Day 1 Lecture: Welding,
Welding film strip
3
Read Chapter Summary
Read Key Words
Answer review questions
1.
2.
3.
Types of processes
Welding symbols
Welding Application
Create CAM profile drawing
14th Read Chapter 22: Welding Representation
Read Chapter Summary
Read Key Words
Answer review questions
Work handout sheets in class
Lab : Create welding drawing.
Day 1 Lecture: Application of Weld Symbols
Work on weld problem
Day 1 Lecture – Drafting Mathematics
Work on handout assignment
4
5
1.
2.
Math constants
Use of Trigonometry to solve machine drafting
problems.
Day 1 Lecture – Use of Auxiliary views
6
1.
1.
Review use of auxiliary views
How to calculate the weight of a part
Lecture: Design & Working Drawings
7
1. Design process
2. Sheet sizes
3. Design Layout
4. Production Drawings
Title Block Layout
Discuss the grade lab assignment
Locator handout problem
Work on locator problem
14th edition - Read Chapter 13: Design and Working drawings
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Work on Belt Tightener Assembly
Review for Midterm
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Midterm
14th Read Chapter 11: Tolerancing
Day 1 Lecture: - Tolerancing
Read Chapter Summary
Read Key Words
Answer review questions
1.
2.
3.
Purpose
Definitions used
Fits between mating parts
Lab : Work on details of Belt Tightener
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DFTG-2302 – Machine Drafting
Day 1 Lecture – Geometric Tolerancing
Geometric Tolerancing Filmstrip
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14th Read Chapter 11: Geometric Tolerancing
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Work on details of Belt Tightener
Day 1 Lecture - Threads & Fasteners
1.
2.
3.
Definitions of screw threads
Thread Notation
How to drawing machine threads
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14th Read Chapter 12: Threads & Fasteners
Read Chapter Summary
Read Key Words
Answer review questions
Work on handout sheet on threads.
Lab : Work on details of Belt Tightener.
Day 1 Lecture – Assembly Drawings
11
1.
2.
3.
Types of Assembly Drawings
How to Drawing Assembly Drawings
How to create a Bill of Materials
Day 1 Lecture: Manufacturing Design and Process
12
1.
2.
3.
4.
Dimensioning Production Drawings
Production Process
Engineer Materials and Properties
Measuring Devices
Day 1 Lecture – Reproduction & Control of Drawings.
Current trends in Mechanical Technology.
13
1.
The use of computers in drafting.
Review for Midterm
2.
Day 1 Lecture – Vendor Data Research
14
1.
2.
3.
Create Belt Tightener Drawing
14th Read Chapter 9: Manufacturing Processes
Read Chapter Summary
Read Key Words
Answer review questions
14th Read Chapter 14: Drawing Management
Read Chapter Summary
Read Key Words
Answer review questions
Lab : Work on Belt Tightener Assembly
Use internet to find technical Product Data
Vendor Product Catalogs
Engineering Specifications Catalogs
Library use
Evaluate your Instructor: EGLS3 Evaluation for Greater
Learning Student Survey System.
All outstanding work must be turned in this week
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Turn in: Final Project
16
Take Final Exam
(2 hrs maximum)
Final Exam
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DFTG-2302 – Machine Drafting
Houston Community College System Drafting & Design Technology
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DFTG-2302 –Machine Drafting
ADDITIONAL INFO & RULES
1. TEXTBOOK:
• Textbook is available at Town & Country Campus Bookstore (713) 468-5300.
• Materials on specific topics prepared by the instructor might be handed out, if needed. It is student’s
responsibility for making copies of hand-outs from classmates should he/she missed a class meeting.
2. MATERIALS REQUIRED
• Drafting instruments (See list)
3. CLASS RULES
a. All cellulars and pagers must be turned off during the class meeting.
b. Sign in on the Blue Form for every class meeting (not available until the second week)
c. Email or call your instructor at least 24 hours if you can not make the class.
d. SCHOLASTIC DISHONESTY:
Students are responsible for conducting themselves with honor and integrity in fulfilling course requirements.
College System Officials may initiate penalties and/or disciplinary proceedings against a student accused of
scholastic dishonesty.
"Scholastic dishonesty" includes, but is not limited to, cheating on a test, plagiarism, and collusion.
Please reference the following web link for additional information: http://northwest.hccs.edu
4.
COURSE EVALUATION PROCEDURES:
a. Assignments: Unless otherwise specified, each assignment must be completed and turned in
within the following week for an up-to-full credit.
b. Quizzes: In-class exams will be given during the semester.
c. Final Project & Examination: Students will be given a final project and a final exam.
5.
STUDENT EVALUATION:
Attendance (Lecture session)
Drawing assignments
Midterm Exam
Final Exam
Final Project
Total:
10%
20%
20%
20%
30%
100%
6. GRADE PROCEDURE:
A = 90-100
C = 70-79
F = 59 and below.
B = 80-89
D = 60-69
I = Incomplete (*)
(*) Fail to submit Final project or not show up at the Final Exam
7.
WITHDRAWAL
It is student’s responsibility to withdraw from the class. Check calendar for the official last day to withdraw.
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