VILNIUS GEDIMINAS TECHNICAL UNIVERSITY
Ieva ŠVAGŽDYTĖ
Oleksandr KAPUSTYNSKYI
Andrius GEDVILA
Theory and practice of measurements
Laboratory tests
Vilnius, 2022
The Study book has been recommended for publishing by the Study committee of the Faculty of Mechanics, Vilnius Gediminas Technical University
Reviewers: Assoc. Prof. S. Petkevičius, Department of Mechatronics, Robotics & Digital Manufacturing, Vilnius Gediminas Technical University
Dr D. Vainorius, Department of Mechanical and Materials Engineering, Vilnius Gediminas Technical University
The bibliographic information of this book is available in the National Bibliographic Databank of the Martynas Mažvydas National Library of Lithuania (NBDB)
Vilnius Gediminas Technical University book No. 2022-042-S
ISBN 978-609-476-309-0
eISBN 978-609-476-310-6
doi:10.20334/2022-042-S
This publication is subject to the condition that it shall not be reproduced, publicised or made publically available through computer networks of libraries, libraries of education and science institutions, museums or archives, to which this piece of work is made available. Permissions can be requested by e-mail: eleidyba@vilniustech.lt
© Vilnius Gediminas Technical University, 2022
3 TABLE
Introduction ................................................................ 4 Laboratory work 1 Measurement of dimensions and geometric shape of cylindrical parts (shafts) ................................................. 5 Laboratory work 2 Measuring of radial circular and axial circular run-out ........................ 16 Laboratory work 3 Measuring of cylindrical holes with bore gauges (indicator and digital) .................................................... 23 Laboratory work 4 Measuring of angles and cones............................................. 29 Laboratory work 5 Measuring of surface roughness with a double microscope and profilometer 36 Laboratory work 6 Measuring of cylindrical samples with a vertical optimeter. Determination of limit and real dimensions of go-no-go plug gauges ........... 45 Laboratory work 7 Measuring with altimeter 59 Laboratory work 8 Measuring of a screw thread with an instrumental microscope ................. 71 Laboratory work 9 Measuring with Coordinate Measuring Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 Laboratory work 10 Measurement with a video-measuring microscope 96 References 103
OF CONTENT
INTRODUCTION
Measurements are one of the most important parts of mechanical engineering. Details should be measured during the manufacturing process, perform final measurements after production, process the obtained results statistically. The connecting dimensions are controlled during assembly. It is necessary to evaluate the accuracy of the control device, possible errors. Constructors and designers specify product requirements in drawings, which must be read properly by both manufacturers and quality controllers. The specific concepts learned in this discipline allow mechanical and manufacturing engineers to communicate and collaborate with each other around the world.
It is important to acquaint students with various measurement methods and tools, to give them the opportunity to try them in practice. During these laboratory works, students learn to evaluate the applicability and accuracy of the measuring device, use it to measure the desired parameters, and analyze the results obtained.
Until a few decades ago, measuring instruments were mostly mechanical, with a lot of work to be done by a human being. With the development of various technologies, measuring and control devices are made more and more accurate, and additional electronics expand their possibilities of use. This booklet is a supplemented edition of “Measurement Theory and Practice: Laboratory Work”, published in 2006. It contains three updated and two new job descriptions. They are developed by supplementing the laboratory with new equipment and in order to acquaint students with modern measurement technologies. Five more laboratory works from an older edition of the booklet can also be found here.
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