ABRASIVE WATER JET NOZZLE, AND ABRASIVE WATER JET MACHINE

摘要

PROBLEM TO BE SOLVED: To improve processing precision by restricting clogging of abrasives inside a nozzle.SOLUTION: There is provided: a mixing chamber 3 formed of an air chamber, into which abrasives G are introduced from a supply port 31; a mixing nozzle 5 disposed on a downstream side against the water nozzle 4 to mix the abrasives G with a water jet WJ jetted out of the water nozzle 4 and to jet it into the mixing chamber 3 through a through hole 51; and an abrasive nozzle 6 disposed on a downstream side against the mixing nozzle 5 so as to introduce the water jet AW thereinto and so as to jet an abrasive water jet AWJ. A hole diameter D3 of the through hole 51 of the mixing nozzle 5 is formed larger than the hole diameter D1 of the water nozzle 4 so that the abrasives G inside the mixing chamber 3 are sucked together with air into a clearance δ1 formed between the water jet WJ passing through the through hole 51 and an inner peripheral surface of the through hole 51 to mix with the water jet WJ inside the through hole 51.