Slide 2 Tutorial: Engineering technology Topic: Water jet
cutting Prepared by: Ing. Josef Martink st. Projekt Anglicky v
odbornch pedmtech, CZ.1.07/1.3.09/04.0002 je spolufinancovn
Evropskm socilnm fondem a sttnm rozpotem esk republiky. Slide 3 For
treatment of soft materials is used Clean Water Jet WJM Suitable
abrasive is e.g. natural garnet, olivine and other materials
selected to suit the hardness of cut material (e.g. salt, cocoa in
food processing industry) Standard accuracy is 0,1 mm/m. Cut
material is not strained. Cutting edge is not affected by heat, it
is always cold cutting. Slide 4 WJM Water Jet Machining pure water
jet or so called hydrodynamic machining AWJ Abrasive Water Jet
Machining machinery by abrasive water jet Slide 5 Abrasive
reservoir High pressure water High pressure piping Water jet Mixing
chamber Abrasive jet Cutting material Picture Principle scheme AWJ
technology WJM technology Slide 6 Picture 2.14. Abrasive input
systems for AWJ technology a)Jet with radial abrasive input to
water jet b)Jet with axial abrasive input Slide 7 Picture 2.3
Cutting machine description and its components Material for energy
absorption Scrap water Scrap arrester Abrasive reservoir water Oil
Transport system (high pressure pipes) High pressure pump Transport
system and measuring equipment High pressure valve Supporting grate
Work piece Output jet Across rail Water jet Mixing chamber Cutting
nipple Slide 8 Accumulator High pressure piping with pressurised
water Abrasive Cutting nipple Multiplicator Abrasive input Water
jet Oil pump Water input Electric engine Principle AWJ technology
scheme Slide 9 Output jet Abrasive input High pressure liquid input
High pressure pipe High pressure water jet Mixing space Mixing jet
Abrasive water ray Picture 2.12 Cutting nipple scheme Slide 10
Slide 11 Slide 12 Flame cutting examples - glass Flame cutting
examples different kinds of plastics Flame cutting examples -
aluminium Flame cutting examples glass hardened fibres Slide 13
Water is compressed by pump to pressure of 400 MPa (4 000 bars)
Jets diameter is 0,003 mm to 0,4 mm If we want to reach smooth and
accurate cutting, we use smaller travel speed ( about 25%). Cutting
is very noisy, it is possible to turn it down by cutting under
water. Jets speed is 3 times higher than speed of sound. Slide 14
Describe basic techniques WMJ - AWJ What material thickness can we
cut? Slide 15 DILLINGER. KOLEKTIV. Modern strojrenstv pro kolu 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 slovnk technick anglicko-esk a
esko-anglick. Plze: Nakladatelstv Fraus, 2000. ISBN 80-7238-075-3
Lingea LEXIKON 5, Technick slovnk anglicko-esk a esko-anglick.
2010.