Anglicky v odborných předmětech "Support of teaching technical subjects in English “

1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineeringmetrology Topic:Measuringarm FARO Preparedby:Ing. Pavel Rožek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. Measuring arm FARO

3. Mobile measuring arm • Measuring arms are sectional axis measuring machines whose basic component is a mechanical arm with several joints (links).

4. Mobile measuring arms • Monitored elements (e.g. sizes) are scanned by contact sensors. • Thanks to ball & joint principle, it is possible to measure by sensor at hard to access places of measured object (e.g. In cavities). • Measuring extent of these systems is from 1,2 m to 3,8 m. • Due to its small weight and high mobility, measuring arm can move easily towards measured object or it can be placed exactly on the machine tool.

5. Faro Arm Fusion • FARO Arm Fusion is the lowest type in line. Its advantage is measuring accuracy, ergonomics and reliability in workshop setting conditions. Type(measuring extent) – number of axis Accuracy – repeatibility of one point measuring in space Lengtht accuracy Weight

6. Basic components of measuring machine Measuring machine with own balance and temperature compensation PC and software POLYWORKS V11 Mobile tripod

7. Accessories Fixed fixture: used toplace measuring arm directly to tableor to mobile truck. Clamp is bolt to table tightly. Magneticfixture: used to place measuring arm to magnetic surface e.g. exactly on monitored component Vacuum fixture: used to place measuring arm to non-metallic or non-magnetic surface of measured component

8. Accessories Contact probe: Selected in accordance to shape and measured component complexity. They are divided up to probe diameter (ball), up to length or shank shape. Shifting cone: used to measuring large sized components, larger than measuring arm extent.

9. Usage in practice • Aircraft production: components´ measuring, balancing tools and forms setting • Car industry: components´ measuring, balancing tools and forms setting • Metalworking: inspection of the 1st component, measuring in piece and series production • Forms´ and tools´ inspection, scanning and making prototypes, machining control

10. Contact probe calibration • It is necessary to make contact probe and scanner calibration before measuring or in case of contact probe change. • It is necessary to use calibration table, set measuring machine accuracy is checked by this way.

11. Scanner calibration • At first, we calibrate calibration plate surface and then we calibrate scanner. • When the calibration is successful, we can start measuring inspection or components´ scanning

12. Measuringpossibilities 3D scanning • Used to component checking by comparing with CAD model and engineering reverse. • The result is graphic report, chart or graphic detail with selected values presentation. Inspection measuring • Used to measured component inspection by contact method. • Result is measuring report or graphic comparison of measured component with model.

13. Measuring report • Scan and CAD model comparing - 3D scene

14. Question 1 Describe measuring arm and its measuring ways Question 2 Explain measuring arm usage in practice

15. Literature • NENÁHLO, Čeněk. Měření geometrických veličin. 1. Praha : ČMS, 2005. 207 s. • ČECH, Jaroslav; PERNIKÁŘ, Jiří; PODANÝ, Kamil. Strojírenská metrologie : skripta. druhé. VUT- FSI Brno : AKADEMICKÉ NAKLADATELSTVÍ CERM, 2005. 176 s. • Manuál POLYWORKS 11 • FARO NEWS - magazín FARO Translation: • www.seznam.cz • www.slovnik.cz • JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, 2000. ISBN 80-7238-075-3 • Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický. 2010.