Abrading – Abrading process – Utilizing fluent abradant
Reexamination Certificate
2000-08-03
2001-11-13
Banks, Derris H. (Department: 3723)
Abrading
Abrading process
Utilizing fluent abradant
C451S039000
Reexamination Certificate
active
06315640
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a method of cutting bodies made of metal or metal alloys by using a high-pressure water jet.
BACKGROUND OF THE INVENTION
As is already known from the DE 25 44 129 A1, the use liquid jets as a means for cutting or grinding various materials has been long known. The first publication about this topic deals with cutting rock formations and coal deposits. In addition to cutting with a continuous jet, cutting with a pulsed jet has proven itself useful because of the possibility to reach higher cutting and separating pressures. The speed at which the water jet leaves the nozzles amounts to at least 30 m/s. The pressures of the liquid are mostly in the order of magnitude of 3×10
8
Pa. Basically the cutting of metal bodies up to thickness of about 200 mm is also possible and has already been practiced. In order to enhance the cutting effect, it has been proposed to add to the liquid, mostly a water jet, a chemical additive or abrasive agent, e.g. garnet sand (see DE 44 22 769 A1). The disadvantage here is the relatively long cutting process. For this reason a cutting torch is used for cutting slabs.
OBJECT OF THE INVENTION
It is the object of the present invention to provide a cutting method using a high-pressure water jet, whereby the cutting speed in the case of metal or metal alloy pieces can be increased.
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“Trennen Durch Schneiden” by H. Benninghoff (Technische Rundschau No. 35/36 1997).
“Technische Textilien Mit Wasser Geschnitten” (Chemiefasern/Textilindustrie, 40/92, Year Mar. 1990.
EIN Comeback Für Die “Wasserlanze” by F.H. Kruse (Bekleidung+Wäsche 15/1985).
Evertz Egon
Seybold Rolf
Banks Derris H.
Dubno Herbert
Egon Evertz KG (GmbH & Co.)
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