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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.