Course code MašZ3032

Credit points 3

Measuring Technigue

Total Hours in Course81

Number of hours for lectures8

Number of hours for seminars and practical classes8

Number of hours for laboratory classes16

Independent study hours49

Date of course confirmation17.02.2015

Responsible UnitInstitute of Engineering and Energetics

Course developer

author Inženiertehnikas un enerģētikas institūts

Daina Kanaška

Dr. sc. ing.

Course abstract

The aim of the course is to get knowledge in history of development of technical measuring, classification and characteristic of measuring methods as well as measuring instruments, their classification and usage; obtain skills in metrological parameters of measuring instruments, measuring errors and the possibilities to eliminate them, basics of measuring instrument choice. Students get acquainted with the fundamental conceptions according to international standards and terminology, with the quality theoretical characteristic, with the quality of surface. They obtain knowledge about the united structural conception of fits and tolerances system, principal terms of mating machine members, calculation and selection of fits. Students acquire the tolerances for bearing, for angular and conical dimensions, the tolerances and fits for machine parts mated gears, worm - gears, keys, slots etc.

Learning outcomes and their assessment

Knowledge’s: the fundamentals of metrology, the regularities of precision of gauges as well as measuring results and determination factors, the fundamentals of measuring methods as well as working principles of gauges – Test 1; on the importance of interchangeability, its basic concepts and definitions - Test 2.
Skills: to make engineering metrology, to make calibration of gauges as well as evaluation of errors, make the analyses of measuring results – laboratory works; use the acquired knowledge in assembly and parts drawings – practical works.
Competence: Selection and justification of appropriate measuring equipment and method, analysis of errors of gauges and measuring as well as, evaluation of geometric parameters, eligibility and choice solutions; use the acquired knowledge and skills in innovation, design and manufacture of any machine-building industry – Practical work.

Course Content(Calendar)

1. History of technical measurement development. Length measure at different times and countries. 1h – lect.
2. Basic concepts of Engineering Metrology in mechanical engineering. 1h – lect.
3. Basic types of gages. Classification of measurement methods. 1h – lect.
4. Main metrological characteristics of measuring instruments. 1h – lect.
5. Classification and characterization of measurement errors. 1h – lect.
6. Choice of Universal Measuring Instruments. Ensuring of uniform of measurements. 1h – lect. 2h – practical work.
7. Ensuring of accuracy of measurement. 2h – practical work.
8. Length standards in industry. 4h – lab. practice.
Test 1: Engineering metrology.
9. Vernier Calipers. Reference devices. Caliper construction. 1h lect. 2h lab. pract.
10. Depth measuring caliper. Height caliper. Vernier Calipers errors. 2h lab. pract.
11. Micrometric tools. Micrometric tools reference devices. 4 h lab. pract.
12. Mechanical measuring tools. Clock type indicators with gear transmission. 1h lect.
13. Measuring equipment with bore gauges. Indicator clamp. Lever micrometer. 2 h lab. pract.
14. Methods and means of measuring angles and cones. Angle gauges. Corners, 2 h lab. pract.
15. Accuracy of machines and apparatus. Statistical analysis of measurements. Product accuracy. 2h practical work.
16. Principles of creating of virtual measuring instruments. 2h practical work.

Test 2: Interchangeability and system of fits.

Requirements for awarding credit points

Test with a mark.
Test task consists of:
- test on theoretical subject acquired in the course;

- all tests, laboratory work, practice work must be credited, the company visit report submitted.

Description of the organization and tasks of students’ independent work

To prepare for laboratory work by studying literature and Internet resources. To prepare reports after the visit of the companies of the industry in connection with the organization of metrological processes in the company.

Criteria for Evaluating Learning Outcomes

The assessment of the study course test mark depends on the assessment of the final test mark and the cumulative assessment of the study course tests.
The student can successfully pass final test if at least 50% of the test questions are answered correctly.
Students who have rating at least 7 may skip the theoretical test and equate the arithmetic mean of the test scores in the course with the assessment of the theoretical test. The final grade is calculated as the arithmetic mean of the mark of the final test tasks and the average grade of the semester, which is calculated as the arithmetic mean of the semester tests.

Compulsory reading

1. Šīrons E. Detaļu ģeometrisko parametru mērīšana. Rīga: RTU, 2007. 344 lpp.
2. Šīrons E. Vispārīgās metroloģijas pamatkurss. – Rīga: RTU, 2008. 242 lpp.
3. Šīrons E. Sarežģītu profilu parametru mērīšana. Rīga: RTU, 2011. 224 lpp. 4.
4. Raghavendra N.V.Engineering metrology and Measurements.Oxford University Press, 2013. 546 pp.

5. Mechanical and Metal Trades Handbook, 2nd edition, 2010, Media Print Informationstechnologie, Paderborn, Germany, 420 pp.

Further reading

Measuring instruments Catalog. Mitutoyo, 2018/2019/2020

Periodicals and other sources

1. Journal of Quality Technology.

2. Quality Engineerig (Journal).

Notes

Compulsory Course in Professional Bachelor study programme Machine design and Manufacturing.