Tutorial: Engineering technology Topic: Welds´testing Prepared by: Ing. Josef Martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002.

Prezentace na téma: "Tutorial: Engineering technology Topic: Welds´testing Prepared by: Ing. Josef Martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002."— Transkript prezentace:

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2 Tutorial: Engineering technology Topic: Welds´testing 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.

3  Weld’s quality depends on the type of used technology  Depends on prescribed conditions  Steel construction welding, piping welding, vessels of nuclear reactors  Quality of welds are important – it is necessary to test them

4 Testing plate Mandrel Weld deposit Testing plate Mandrel Carry rollers Weld cladding bending test Weld fracture testing

5  Weld root is checked at bending  Bend angle is to120°  Damaged weld is fractured

6  Root run of filler  Weld testing is done by fracturing  At fractures are visible sand inclusions of coated electrode

7  Weak current  Normal current  Heavy current

8  Spraying by red colour - weld  Weld washing – to remove red colour from surface  White colour spraying, red colour rises from weld by capillary action and if it is there – crack is shown.

9  Longitudinal defect detection– cavities, fissures etc.  Resistance and induction welding of steel pipe Screen Defects Tested product Contact medium Probe Limit echo of back wall Failure echo sounds Input sound Measuring instrument

10  Weld macrostructure  X-ray picture – processed by TV chain  Deffects - lighter parts  Control steel up to width of 80 mm, aluminium 800 mm X-ray lamp Material defects Picture amplifier Video camera Product X-ray radiation Product picture Testing chamber

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12  Describe capillary testing  Describe X-ray testing  What does the weld resistance to bend depend on?

13  DILLINGER. KOLEKTIV. Moderní strojírenství pro školu i praxi. ISBN 9788086706191. pro konkurenceschopnost, ESF 2007 – 2013. Translation:  www.seznam.cz www.seznam.cz  www.slovnik.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.