Course Number and Title:
MET 245 Machine Design
Prerequisites
Prerequisite: (MET 242 or CET 270) and MET 243 and MET 264 or concurrent
Course Credits and Hours
3 credit(s)
3 lecture hours/week
0 lab hours/week
Course Description
This course covers design principles and calculations appropriate to various machine elements, including, bearings, drive shafts, drive shaft couplings, power screw drives, belt drives, chain drives, gear drives, brakes, clutches, and fastened and welded connections.
Core Course Performance Objectives (CCPOs)
- Analyze various types of friction applications, including friction requirements and selection of appropriate materials and lubricants. (CCC 2, 6; PGC 3)
- Differentiate among and specify various types of bearings for specific applications. (CCC 1, 2, 5, 6; PGC 3)
- Calculate correct machine drive components such as shafts, couplings, power screws, gears, belt and chain drive systems. (CCC 2, 6; PGC 2, 3)
- Differentiate between various types of mechanical fasteners and specify appropriate types and sizes for specific uses. (CCC 2, 5, 6; PGC 2, 3)
- Calculate and size of welded connections and define the welded connection on a mechanical engineering drawing IAW AWS A2.4 (. (CCC 2, 5, 6; PGC 2, 3)
- Differentiate between various types of brake and clutch systems and size for specific uses. (CCC 2, 5, 6; PGC 2, 3)
See Core Curriculum Competencies and Program Graduate Competencies at the end of the syllabus. CCPOs are linked to every competency they develop.
Measurable Performance Objectives (MPOs)
Upon completion of this course, the student will:
- Analyze various types of friction applications, including friction requirements and selection of appropriate materials and lubricants.
- Analyze the following types of friction applications solving for applicable parameters such as rubbing velocity, frictional force, horsepower (HP) lost, rolling resistance, pivot friction, sleeve bearings, and collar friction.
- Determine various friction requirements, and select the proper materials and lubricants as required for specific applications.
- Differentiate among and specify various types of bearings for specific applications.
- Using appropriate manufacturers' data, specify proper roller bearings for specific applications by determining design load, life factor, speed factor.
- Calculate the correct size for bushing for an application involving the following parameters: projected area, allowable pressure, bearing length, and length-to-diameter (L/D) ratio.
- Calculate correct machine drive components such as shafts, couplings, power screws, gears, belt and chain drive systems.
- Calculate shaft sizes for both solid and hollow circular shafts under the following loading systems: pure torsion, torsional deflection, torsion and bending, torsion tension, and compression.
- Determine critical speeds of rotating shafts under various load conditions.
- Apply stress-concentration factors for various stress risers to shaft design calculations.
- Determine the correct size for flange, spline, and keyed couplings.
- Identify the differences between different types of articulated couplings.
- Perform calculations to determine the loads applied to power screw drive systems.
- Calculate ratios, RPM, torque values for gear, belt drive and chain drive systems.
- Identify and size different types of gears for a drive application.
- Identify and size different chain drive systems for an application.
- Identify and size different belt drive systems for an application.
- Differentiate between various types of mechanical fasteners and specify appropriate types and sizes for specific uses.
- Identify typical fasteners using head markings.
- Design bolted connections by specifying:
- Fastener type (Head style, washers and nut)
- Diameter
- Grade
- Bolt head and nut clearances with other fasteners and structures
- Calculate and size of welded connections and define the welded connection on a mechanical engineering drawing IAW AWS A2.4
- Perform calculations on welded connections to determine the correct size weld.
- Identify and apply the welding symbols to a mechanical engineering to communicate the desired.
- Differentiate between various types of brake and clutch systems and size for specific uses.
- Identify the purpose and different types of brake and clutch systems for specific uses.
- Size brakes and clutches based on the forces in a drive system.
Evaluation Criteria/Policies
The grade will be determined using the Delaware Tech grading system:
| 90-100 |
= |
A |
| 80-89 |
= |
B |
| 70-79 |
= |
C |
| 0-69 |
= |
F |
Students should refer to the
Catalog/Student Handbook for information on the Academic Standing Policy, the Academic Integrity Policy, Student Rights and Responsibilities, and other policies relevant to their academic progress.
Final Course Grade
Calculated using the following weighted average
Evaluation Measure | Percentage of final grade |
Summative Assessments |
Written Exams (Equally Weighted) | 85% |
Formative Assessments |
Quizzes | 10% |
Resume | 5% |
TOTAL | 100% |
Program Graduate Competencies (PGCs are the competencies every graduate will develop specific to his or her major)
- Safely utilize typical machine shop equipment and manufacturing techniques to accurately manufacture projects.
- Perform calculations of forces to size and select structural components and appropriate materials.
- Perform calculations of all parameters to size components related to various mechanical system designs.
- Interpret and produce good mechanical engineering drawings and effectively create solid models of parts and assemblies.
- Exhibit professional traits, including the ability to work with minimal supervision independently while contributing to team project, using effective problem-solving skills and make appropriate decisions relative to the technical field.
Core Curriculum Competencies (CCCs are the competencies every graduate will develop)
- Apply clear and effective communication skills.
- Use critical thinking to solve problems.
- Collaborate to achieve a common goal.
- Demonstrate professional and ethical conduct.
- Use information literacy for effective vocational and/or academic research.
- Apply quantitative reasoning and/or scientific inquiry to solve practical problems.
Students in Need of Accommodations Due to a Disability
We value all individuals and provide an inclusive environment that fosters equity and student success. The College is committed to providing reasonable accommodations for students with disabilities. Students are encouraged to schedule an appointment with the campus Disabilities Support Counselor to request an accommodation needed due to a disability. The College's policy on accommodations for persons with disabilities can be found in the College's Guide to Requesting Academic Accommodations and/or Auxiliary Aids Students may also access the Guide and contact information for Disabilities Support Counselors through the Student Resources web page under Disabilities Support Services, or visit the campus Advising Center.