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Opracowanie metody badania błędów dynamicznych w pomiarach skaningowych na maszynach współrzędnościowych

Grzegorz Krajewski

Abstract

Through the last decades, the coordinate metrology become the powerful and essential part inspection technique in a wide range of industries. The Coordinate Measuring Machine (CMM) is the main tool of this technique. It allows simple and easy measurement of even complicated three dimensional components, by gathering numbers of geometrical points. This results in the huge popularity of the CMM machine parts inspections. Scanning probes CMM are currently treated as a standard in coordinate metrology. Not only because of gathering high quantity of data in short time of probing but also significantly decreasing the inspection time. More efficiency in coordinate metrology equals faster measurement cycles with acceptable accuracy. But in fact, the scanning speed significantly influences the error budget. The hereby thesis is theoretical and experimental study of the CMM’s dynamic properties. Based on the proposed model, the method of testing CMM’s dynamic properties has been developed. The new method of investigating CMM’s dynamic properties consist of the scanning measurement of the simple shape master artefact. The assembly of two flat reference plates has been used as a shape standard. The proposed method for testing the dynamic properties of a coordinate measuring machine is a reliable test for machine dynamics. Application of an angle artefact enables testing of the dynamic properties of the machine and checking it’s ability to execute the measurement with a speed that guaranties the required accuracy. Based on this measurement, applying spectrum analysis CMM errors has been evaluated and assigned to the error sources. The experimental study has been extensively presented. Measurements have been carried out on two CMMs equipped with two types of probes (active and passive). The influence of a scanning speed, type of probe, artefact location and stylus length are taken into consideration. The effects of frictional interaction between the stylus tip and the part surface are also considered and mathematically explained. The whole thesis has been analyzed using statistical tests confirming dependence between compared factors. Developed method for testing dynamic errors of CMM have also been confirmed by another original measuring method. Detailed analysis of scanning process has been extensively presented and preceded by deep literature overview. This conforms original input into developing the knowledge of scanning measurements effects. The developed method is also a source of unique knowledge of optimizing scanning CMM measurements.
Record ID
WUTbe778e8435324d9c8d709615b8e79bba
Diploma type
Doctor of Philosophy
Author
Grzegorz Krajewski Grzegorz Krajewski,, The Institute of Metrology and Biomedical Engineering (FM/IMBE)Faculty of Mechatronics (FM)
Title in Polish
Opracowanie metody badania błędów dynamicznych w pomiarach skaningowych na maszynach współrzędnościowych
Language
(pl) Polish
Certifying Unit
Faculty of Mechatronics (FM)
Discipline
mechanical engineering / (technology domain) / (technological sciences)
Status
Finished
Defense Date
03-12-2014
Title date
17-12-2014
Supervisor
Internal reviewers
Eugeniusz Ratajczyk Eugeniusz Ratajczyk,, Faculty of Mechatronics (FM)
External reviewers
Małgorzata Poniatowska, prof. Politechnika Białostocka Małgorzata Poniatowska, prof. Politechnika Białostocka,, Undefined Affiliation
Pages
138
Keywords in English
Through the last decades
Abstract in English
Through the last decades, the coordinate metrology become the powerful and essential part inspection technique in a wide range of industries. The Coordinate Measuring Machine (CMM) is the main tool of this technique. It allows simple and easy measurement of even complicated three dimensional components, by gathering numbers of geometrical points. This results in the huge popularity of the CMM machine parts inspections. Scanning probes CMM are currently treated as a standard in coordinate metrology. Not only because of gathering high quantity of data in short time of probing but also significantly decreasing the inspection time. More efficiency in coordinate metrology equals faster measurement cycles with acceptable accuracy. But in fact, the scanning speed significantly influences the error budget. The hereby thesis is theoretical and experimental study of the CMM’s dynamic properties. Based on the proposed model, the method of testing CMM’s dynamic properties has been developed. The new method of investigating CMM’s dynamic properties consist of the scanning measurement of the simple shape master artefact. The assembly of two flat reference plates has been used as a shape standard. The proposed method for testing the dynamic properties of a coordinate measuring machine is a reliable test for machine dynamics. Application of an angle artefact enables testing of the dynamic properties of the machine and checking it’s ability to execute the measurement with a speed that guaranties the required accuracy. Based on this measurement, applying spectrum analysis CMM errors has been evaluated and assigned to the error sources. The experimental study has been extensively presented. Measurements have been carried out on two CMMs equipped with two types of probes (active and passive). The influence of a scanning speed, type of probe, artefact location and stylus length are taken into consideration. The effects of frictional interaction between the stylus tip and the part surface are also considered and mathematically explained. The whole thesis has been analyzed using statistical tests confirming dependence between compared factors. Developed method for testing dynamic errors of CMM have also been confirmed by another original measuring method. Detailed analysis of scanning process has been extensively presented and preceded by deep literature overview. This conforms original input into developing the knowledge of scanning measurements effects. The developed method is also a source of unique knowledge of optimizing scanning CMM measurements.
Thesis file
  • File: 1
    Praca Doktorska_Grzegorz Krajewski.pdf
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Citation count
2

Uniform Resource Identifier
https://repo.pw.edu.pl/info/phd/WUTbe778e8435324d9c8d709615b8e79bba/
URN
urn:pw-repo:WUTbe778e8435324d9c8d709615b8e79bba

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