초록 ▼

An abrasivejet system for cutting brittle materials is disclosed. One feature of the disclosed system is a jet-producing nozzle assembly which includes means for inducing turbulence in the jet-forming liquid during the period in which the jet initially impacts on the brittle material so that impact

An abrasivejet system for cutting brittle materials is disclosed. One feature of the disclosed system is a jet-producing nozzle assembly which includes means for inducing turbulence in the jet-forming liquid during the period in which the jet initially impacts on the brittle material so that impact stress on the material is reduced. A second disclosed feature is a supplementary suction device, preferable in the form of a second nozzle dimensioned for maximum suction, which maintains a generally constant feed rate of abrasive into the cutting nozzle assembly during the turbulence-inducing phase of operation.

대표청구항 ▼

An abrasivejet cutting system for producing an abrasive-laden jet and directing said jet against a workpiece, the cutting system comprising: (a) nozzle housing means having a fluid-conducting, generally axially-extending passage extending from an upstream end region to a downstream end region, the n

An abrasivejet cutting system for producing an abrasive-laden jet and directing said jet against a workpiece, the cutting system comprising: (a) nozzle housing means having a fluid-conducting, generally axially-extending passage extending from an upstream end region to a downstream end region, the nozzle housing means including an inlet port communicating with the upstream end region for permitting the ingress of high pressure liquid into the passage; (b) orifice-defining means positioned in the downstream end region of the passageway to produce a highly coherent, high velocity cutting jet from the high pressure fluid passing through the orifice; (c) means for conducting abrasive particles from an abrasive source external to the nozzle housing means to a mixing region within the nozzle housing means adjacent the high velocity jet so that the abrasive becomes entrained with the jet by the low pressure region which surrounds a moving fluid; (d) discharge means for discharging the abrasive-laden jet from the nozzle means at a downstream end; and (e) auxiliary conduit means communicating with the mixing region and providing an alternative discharge path for abrasive material from the nozzle housing means; (f) means for selectively reducing the impact stress of the abrasive-laden jet on the workpiece while piercing at least the upper surface thereof, the stress reducing means including means for at least partially degrading the coherency of the cutting jet, and (g) means for selectively compelling abrasive from the external source to travel through the mixing region and exit from the nozzle housing means via the auxiliary conduit means.