Abrasive jet stream cutting

B - Operations – Transporting – 24 – C

Patent

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Details

B24C 1/00 (2006.01) B24C 1/04 (2006.01) B24C 5/04 (2006.01) B24C 9/00 (2006.01) B24C 11/00 (2006.01)

Patent

CA 2170351

Abrasive jet stream cutting, wherein an abrasive is suspended in a flowable jet medium (64) and projected at high velocity and pressure (75) at a workpiece (76) is substantially improved by forming the medium of a polymer having reformable sacrificial chemical bonds which are preferentially broken under high shear conditions. Projecting the medium and suspended abrasive breaks the reformable sacrificial chemical bonds while cutting. The chemical bonds will reform, permitting recycling of the medium and abrasive for reuse in the method. The jet is effective at pressures of about 14 to 80 MPa.

Procédé de coupe par jet abrasif consistant à mettre en suspension des particules abrasives dans un jet d'un milieu coulant (64) et à projeter ce jet de particules abrasives à haute vitesse et pression (75) sur une pièce à découper (76), ce procédé étant sensiblement amélioré en utilisant pour le jet coulant un polymère ayant des liaisons chimiques sacrificielles reformables qui sont, de préférence, cassées dans des conditions de cisaillement intense. La projection du milieu coulant et des particules abrasives en suspension dans celui-ci casse les liaisons chimiques reformables sacrificielles pendant que le processus de coupe a lieu. Les liaisons chimiques se reforment ensuite, ce qui permet de recycler le milieu coulant et les particules abrasives et de les réutiliser dans ce procédé. Le jet est efficace à des pressions de l'ordre de 14 à 80 MPa.

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