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

Anglicky v odborných předmětech "Support of teaching technical subjects in English “. Tutorial: Engineering technology Topic : Welding with MAG system Prepared by: Ing. Josef Martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002

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

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering technology Topic: Weldingwith MAG system Prepared by: Ing. Josef Martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Welding with MAG system

  3. Welding machine Mig/Mag

  4. Tables

  5. Assembly of welding machines Universal instrument • • Wire is moved by shifting • • Work place is mobile Booth instrument • • Wire is moved by shifting • • Work place is non movable

  6. Welding machines arrangements Apparatus with small coil • • Wire is moved by pulling • • Longer distances Type Push-Pull • • Wire move is by push & pull • • Longer distances

  7. Welding torch

  8. Wire feeder • Drives coil with wire. For a smooth course of welding process a constant and continuous speed of wire feeding is important. As a feed drive are used DC derivation drives, drives with permanent magnets or high quality motors with disc rotor. These have a very long service life.

  9. Burner setting Perpendicular Pushed • flat penetration • wide weld • Welding direction to the left • depth of penetration medium • width of weld medium • welding direction to the left Pulled • Deep penetration • narrow weld • Weld direction to the left

  10. Protective gas • Protects melted medium again surrounded air • Influence shape of weld • Protective gases are tasteless, colorless, odorless • Protective gasses are poisonless

  11. Fault of welded connections • Fault: • Draft (especially at construction sites) influences protective gas coverage • Result: • Insufficient gas protection creates weld air bubbles

  12. Insufficient root penetration Too small angle of opening – correct value is 40o to 60 o Too blunt edge - big edge offset Welding on cambered bottom layer Correct procedure: Grinding off bottom layer before welding Too big edge overlap

  13. Questions and rehearsal • Name Welding machines arrangements

  14. Used literature • DILLINGER, Josef. A KOL. Moderní strojírenství pro školu i praxi. 1. Praha: Europa-Sobotáles, 2007. ISBN 978-80-86706-19-1. • M. HLUCHÝ, J. KOLOUCH, R. PAŇÁK. Strojírenská technologie II

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