Tutorial: Engineering technology Topic: Plasma cutting Prepared by: Ing. Josef martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
Water cooling electrode Gas for plasma Cutting burner nozzle Pilot electric arc Plasma ray Cutting joint material Picture Plasma burner cutting
Chart: Plasma burner cutting Usage Material thickness Cutting speed Used gases Advantages Disadvantages Alloyed steels, non-iron metal, non-metals to To At separation(cutting) At high-quality cutting Argon, nitrogen or their mixtures, helium, compressed air All metals high-speed cutting with high quality cutting Necessary precautions against noise, dust, gases and UV radiation
Picture Cutting shapes at different cutting ways Plate gauge number in mm Oxygen flame cutting Plasma ray cutting Laser ray cutting Ways of material cutting
By plasma ray at temperature °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
Controls and supervisory components are placed on front and back board(panel)
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.
This is the way of materials´ penetration over 4 mm thickness Shifting speed cannot be too high
Ground cable is connected to material High cutting speed Worn out of electrode
There is not one phase in mains There is too high air pressure Cutting medium is dirty Purging vessel I is choked
Any flammable materials or objects should not be near Don’t cut vessels contaminated by combustibles Not to weld near gas welding set
What precautions to take while flame cutting? What materials are cut by plasma flame? What gases are used?
DILLINGER. KOLEKTIV. Moderní strojírenství pro školu i praxi. ISBN pro konkurenceschopnost, ESF 2007 – Metodika svařování – Odborný výcvik ve 3. tisíciletí Translation: JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, ISBN Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický