| 摘要 |
<p>PURPOSE:To perform a peening process while holding a distance between a processing objective connection part and a liquid injection nozzle to a fixed value. CONSTITUTION:In a connection part 3 formed by connecting a curved surface- shaped metal member 1 to a cylindrical metal member 14 at a fixed angle, high pressure liquid 13 is jetted from a nozzle 12 into liquid, to apply peening to a surface of the connection part 3 by generated cavitation bubbles. Here is adjusted the nozzle 12 for its position and attitude by a control unit 8 through nozzle driving gears 15, 16, 25, 26, 27, 28, 29, 30. In the control unit 8, based on a distance from the nozzle 12 to a surface of the metal member 1 measured by an axial directional distance sensor 20 and based on a distance from the nozzle 12 to a surface of the metal member 14 measured by an axial diametric directional distance sensor 19, a distance L reaching a surface of the connection part 3 from the nozzle 12 is obtained by calculation. The distance L is controlled so as to hold a fixed value, and an effective peening process is applied by holding a position of generating vortex filament cavitation of the highest water hammering pressure in the objective processing connection part 3.</p> |
