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Anglicky v odborných předmětech "Support of teaching technical subjects in English “. Tutorial : Engineering technology Topic : Plasma cutting 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 odborn ch p edm tech support of teaching technical subjects in english

Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“

Tutorial: Engineering technology

Topic: Plasma cutting

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.

plasma burner cutting
Plasma burnercutting

Water cooling

Gas for plasma

electrode

Cutting burner nozzle

material

Pilot electric arc

Cutting joint

Plasma ray

Picture

Plasma burner cutting

slide3

Chart: Plasma burner cutting

Usage

Alloyed steels, non-iron metal, non-metals

Material thickness

to

At separation(cutting)

To

Cutting speed

At high-quality cutting

Used gases

Argon, nitrogen or their mixtures, helium, compressed air

Advantages

All metals high-speed cutting with high quality cutting

Disadvantages

Necessary precautions against noise, dust, gases and UV radiation

slide4

Ways of material cutting

Plate gauge number in mm

Oxygen flame cutting

Plasma ray cutting

Laser ray cutting

Picture

Cutting shapes at different cutting ways

slide5

By plasma ray at temperature30 000°C

  • It melts and immediately evaporates material at the place of ray incidence
  • Cutting is quick, cutting surroundings is not effected
  • Cutting width near burner is bigger
plasma prof 55 machine section
Plasma Prof 55 – Machine section

Controls and supervisory components are placed on front and back board(panel)

plasma prof 55 machine section1
Plasma Prof 55 – Machine section
  • A……Incoming cord.
  • B……Connection G1/4 entrance of compressed cutting air.
  • C……Mains switch to connect machine to el. current.
  • E……Setting controller of working pressure.
  • F……Pressure gauge which shows set working pressure.
  • G……Multifunctional indicator – primarily indicates generator overheating.
  • H……Connection of cutting burner CEBORA. Burner can not be changed.
  • I……..Digester - (purging vessel). Moisture and medium impurities gather there.
  • L……Indicator of insufficient pressure of cutting media.
  • M……Pilot light indicates connection to mains by C switch.
practical machine usage cutting
Practical machine usage - cutting

This is the way of materials´ penetration over 4 mm thickness

Shifting speed cannot be too high

problems with plasma cut ting
Problems with plasma cutting
  • Ground cable is connected to material
  • High cutting speed
  • Worn out of electrode
arc switches off burning is unsettled
Arc switches off – burning is unsettled
  • There is not one phase in mains
  • There is too high air pressure
  • Cutting medium is dirty
  • Purging vessel I is choked
precautions
Precautions
  • Any flammable materials or objects should not be near
  • Don’t cut vessels contaminated by combustibles
  • Not to weld near gas welding set
questions and revision
Questions and revision
  • What precautions to take while flame cutting?
  • What materials are cut by plasma flame?
  • What gases are used?
literature
Literature
  • DILLINGER. KOLEKTIV. Moderní strojírenství pro školu i praxi. ISBN 9788086706191. pro konkurenceschopnost, ESF 2007 – 2013.
  • Metodika svařování – Odborný výcvik ve 3. tisíciletí

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.