Harrisburg Area Community College s1

Division: Business, Engineering, and Technologies Division Subject Code: MWT Course #: 214 Course Title: Metrology

HARRISBURG AREA COMMUNITY COLLEGE

FORM 335

Course Form 335 must be updated at least every five years to qualify for state reimbursement.

1. Digital Description [§335.2]:

Credit hours: 2.00 Lecture hours: 1.00 Lab hours: 3.00

2. Catalog Description [§335.2]:

The use of precision instruments for measurement and inspection of manufactured parts. The course includes the use of comparators, micrometers, surface plates and accessories, microscopes, hardness testing instruments, and other related equipment. Students gather and analyze quality assurance data and inspect parts using non-destructive testing techniques (NDT). Students are prepared to take the National Institute of Metalworking Skills (NIMS) Level I certification in measurement, materials and safety. A laboratory fee is required.

Minimum Grade Required 3. Prerequisites: MATH 174 D

Corequisites:

Other: Permission of Coordinator

4. Learning Outcomes [§335.2] [These outcomes are necessary to enable students to attain the essential knowledge and skills embodied in the program’s educational objectives.]

Through this course, students will:

a. interpret shapes, dimensions, and tolerances from blueprints of mechanical objects and devices; b. recognize lines, symbols, and notes commonly used on blueprints; c. determine shapes of hidden features from blueprints of sectioned objects; d. read geometric dimensions and tolerances on blueprints; e. describe the evolution of measurement as a standardized technology; f. identify and define standard units of measurement in the English System; g. identify and define standard units of measurement in the Metric system; h. convert measurements from the English System to the Metric System and vice versa;

1 Division: Business, Engineering, and Technologies Division Subject Code: MWT Course #: 214 Course Title: Metrology

i. explain the five main sources of error in measuring unknown values, including systematic errors, instrument errors, calibration errors, environmental errors, and human errors; j. explain how the following characteristics influence the selection and use of measuring instruments: accuracy, hysteria; sensitivity/resolution, precision, amplification, range, parallax, discrimination, and calibration; k. identify, cite the applications of, and correctly use the following as described in the classroom and text: 1. Basic graduated instruments: steel rule, inside and outside calipers, depth gage, combination squares. 2. Fixed gages and screw thread gages: plug, taper, ring, screw thread, radius, thickness, small hole gage, telescoping gage. 3. Dial and test indicators: dial indicator equipment, test indicators, surface gages. 4. Micrometers and vernier measuring instruments: outside micrometer, depth micrometers, inside micrometer, vernier calipers, vernier height gages. 5. Precision gage blocks: work grade, inspection grade, master grade. 6. Surface plates and accessories: surface plates, parallels, v-blocks, squares, straight edges. 7. Angular measurement: sine bars, levels, protractors, angle gage heads, rotary heads. 8. Comparison and optical instruments: reed comparator, optical comparator. 9. Measuring machines: coordinate measuring machine (CMM). 10. Surface roughness: tactile surface measurement, profilometer. 1. Hardness testing: Rockwell tester. 12. Non-destructive testing: ultrasonic testing equipment, liquid dye penetrant test equipment. 13. Advanced inspection equipment. 14. Inspection application. l. inspect parts for quality according to a set of blueprints, (NSS-2); m. measure linear dimensions using the Metric System; n. develop an inspection plan and inspect simple parts using precision tools and techniques (NSS-1); o. set up and perform the inspection of profiles in shadow and reflection (NSS-2); p. use a Coordinate Measuring Machine (CMM) to inspect a part (NSS-2, NSS-3); q. define traceability as it applies to the calibration of inspection equipment; r. check the calibration of inspection tools and equipment using acceptable procedures as defined in the classroom and text. Recalibrate as required; s. outline a schedule and discuss considerations for maintaining the calibration of inspection tools and equipment in a manufacturing environment; t. explain how the National Institute for Standards and Technology (NIST) influences the calibration of inspection tools and equipment in the local manufacturing company; u. explain the reason for a calibration tag on a micrometer found at the worksite and describe the impact if its absence is discovered by an ISO9000 auditor;

v. use electronic equipment to inspect parts and gather dimensional data; w. describe a plan to select samples for inspection from a lot of manufactured parts; x. follow a sampling plan and graphically display the results of the data (NSS-1); y. determine the mode, mean, median, range, and standard deviation from a set of data; z. prepare a process control chart for gathered data and statistically analyze the results based upon acceptable tolerances of quality; aa. gather data, conduct the statistical analysis, and perform a capability study (NSS-2); bb. keep the inspection laboratory clean and safe for work (NSS-2); cc. demonstrate proper maintenance and care of precision measuring tools and equipment.

5. Planned Sequence of Learning Activities [§335.2] [These must be designed to help students achieve the learning outcomes.]

Schedule of activities and content:

Week # Week 1 Introduction, overview of course, blueprint reading

Week 2 Blueprint reading, history of measurement, Metric vs. English measurement

Week 3 Blueprint reading, basic principles of measurement, basic graduated instruments, use and care of tools

Week 4 Angular measuring instruments, fixed gages, dial gages, Test #1

Week 5 Test review, dial indicators, precision gage blocks

Week 6 Height measuring instruments, surface plates and accessories, sine bar and shop trig

Week 7 Metrology-calibration and traceability, mechanical comparators

Week 8 Measuring flatness, roundness, straightness, perpendicularity, Test #2

Week 9 Test review, optical comparators, measuring microscopes. Lab group select report

Week 10 Surface texture measurement, hardness testing, screw threads and measurement

Week 11 Gears and measurement

Week 12 Non-contact measurement instruments, measuring machines (MM and Vision), Test #3

Week 13 Test review, quality control (insp and sampling), statistical process control. Lab group draft report due

Week 14 Non-destructive testing

Week 15 Lab group presentations

Week 16 Lab group presentations, final exam. Lab group final report due

6. List of Texts, References, Selected Library Resources or other Learning Materials (code each item based on instructional use: C-lecture/lab, A-lecture, B-lab, I-internet, and V-videocourse) [§335.2] [These resources must be easily accessible to students.]

Measuring and Gaging in the Machine Shop, 1995 Edition, Ft. Washington, MD, NTMA (800-7753) - NTMA

7. Prepared by Faculty Member: William R. Thompson Date: 11/06/03

8. Approved by Dean: Ronald R. Young Date: 11/06/03

This course meets all reimbursement requirements of Chapter 335, subchapters A / B.

This course was developed, approved, and offered in accordance with the policies, standards, guidelines, and practices established by the College. It is consistent with the college mission.

If the course described here is a transfer course, it is comparable to similar courses generally accepted for transfer to accredited four-year colleges and universities.

Whether transfer or career, this course is articulated with other courses so that it is an elective or a requirement of one of the college programs and it does not require students to have more than 30 credit hours of post secondary study prior to enrolling in the program.

9. VP, Instruction and Educational Services: John J. Ford Date: 11/06/03

10. Original Date of course approval by the college: 11/19/98

11. Date(s) of subsequent reviews:

05/26/99 12/01/01 11/03/03