PCC/ CCOG / DRF

Course Content and Outcome Guide for DRF 251

Course Number:
DRF 251
Course Title:
Kinematics Drafting
Credit Hours:
3
Lecture Hours:
10
Lecture/Lab Hours:
0
Lab Hours:
60
Special Fee:
 

Course Description

Introduces mechanisms that translate motion and force, including cams, gears, belts/pulleys and chains/sprockets. Introduces components such as pawls ratchets, linkages and levers. Includes drawings of stock (shelf) items and custom designs. Prerequisite: DRF 135, DRF 136 Audit available.

Intended Outcomes for the course

Upon successful completion of this course, the student will have satisfactorily accomplished the goals and objectives listed in this course content guide. The course content guides are developed by college-wide subject area faculty and approved by management.

  • Develop knowledge and skill in selecting belt and gear mechanisms. The student shall be able to find the component size required relative to power requirements.
  • Develop knowledge and skill in selecting a gear design and the size required relative to power and application requirements.
  • Develop knowledge and skill in mechanisms of direct contact for motion control in position and timing. These reliable mechanisms are found in all scales of machines including machines that manufacture components. The student shall select a type for a specified motion, design; calculate and diagram the motion result.
  • Develop knowledge and skill in mechanisms of motion using linkages and levers. The student will work with some linkages that work in combination with other types of mechanisms.
  • Develop knowledge and skill in the execution by drafting layouts of motion study and manufacturing drawings.

Outcome Assessment Strategies

  • Individual assignments from the required textbook, or additional appropriate sources
  • Group projects working together to solve problems.
  • Quizzes
  • Midterm and final exam

Course Content (Themes, Concepts, Issues and Skills)

1 Belts and Chains
  • Identify and explain a difference between types of standard design belts and types of standard design chain drives.
  • Identify and explain the devices on which the different types of belts and chains ride.
  • Identify and explain the selection processes required for belt and chain drives by power and application specifications.
2 Gears
  • Identify and explain different types of rotating gear drives.
  • Identify and explain different types of linear or interrupted motion gear drives.
  • Identify and explain the selection processes required for the gear drives by power and application specification.
3 Cams
  • Identify and explain types of cam designs and their advantages/limitations.
  • Identify and explain cam nomenclature.
  • Identify and draw cam motions.
  • Identify and explain cam follower types and design.
  • Identify and explain the selection processes required for cam design by motion and power application.
4 Linkages and Levers

  • Identify and explain terms and nomenclature of linkages, levers, cranks and pawls. Identify and explain motion nomenclature and displacement diagrams.
  • Identify and demonstrate motions involving ratchets and other motion selectors.

5 Working Drawings
  • Identify and demonstrate motion of linkages, levers and cranks, and pawls.
  • Identify and demonstrate working drawings including dimensioning/tolerancing with ASME Y14.5M-1994 Geometric Dimensioning and Tolerancing where applicable.
  • Identify and demonstrate displacement diagrams on drawings where applicable.
  • Identify and specify on drawings, a material selection and related notations and specifications.