WATER JET DEVICE FOR CUTTING

摘要

PROBLEM TO BE SOLVED: To couple an inner nozzle onto an outer nozzle at an ideal position while preventing generation of wear to a nozzle hole and attaining easy assembling. SOLUTION: A water jet device is provided with a water jet nozzle 1 formed out of the inner nozzle 2 having a supplying hole 5 for jetting out abrasives opened at the center and the outer nozzle 3 having the nozzle hole 6 for jetting out the abrasives, with high-pressure water, injected from the inner nozzle 2. The outer nozzle 3 has a cornical tapered inner surface 3A narrowing to the nozzle hole 6, the inner nozzle 2 has a conical tapered outer surface 2A brought closer to the tapered inner surface 3A, and a spacer protruding streak 9 is formed between the tapered outer surface 2A and the tapered inner surface 3A so as to serve as a high-pressure water channel 4.