Abstract: Provided is a wet atomizer capable of stably increasing a pressure in a pressurizing chamber and performing highly reproducible raw material process. A wet atomizer includes a motor; a power transmission device that converts a rotational motion of the motor into a reciprocating motion; a high-pressure cylinder; a plunger that reciprocates inside the high-pressure cylinder by the power transmission device to pressurize raw materials; a drive controller that controls the reciprocating motion of the plunger; a nozzle that atomizes pressurized raw material; a first check valve disposed downstream of the nozzle; and a first elastic member that presses the first check valve.

Abstract: A laser machining apparatus that allows efficient machining of a workpiece includes a nozzle for jetting a jet liquid column, a rectifying chamber attenuating disturbances in flow of liquid, a liquid oscillating chamber guiding the liquid flowing from the rectifying chamber to a nozzle inlet opening, a laser oscillator generating a laser beam, a focusing optical system focusing the laser beam generated by the laser oscillator above the nozzle inlet opening so that the laser beam is guided by the jet liquid column, and a window opposed to the nozzle inlet opening so that the laser beam transmitting from the focusing optical system enters the liquid oscillating chamber. The liquid oscillating chamber increases a surface wave on an outer surface of the jet liquid column so that the jet liquid column jetted from the nozzle onto a workpiece is easily atomized at a machining point.

Abstract: A laser machining method, including: liquid supplying into a rectifying chamber; the rectifying chamber attenuating disturbances in flow of the liquid supplied; a liquid injecting into a liquid oscillating chamber exclusively from one direction from a liquid inlet port arranged on only one portion of a sidewall of the liquid oscillating chamber; the liquid jetting as a jet liquid column into air from a nozzle; a laser beam focusing on the axis of the nozzle and guiding to a machining point by the jet liquid column; a surface wave of the jet liquid column generating and gradually increasing in amplitude in the direction away from the nozzle; a body of the jet liquid column atomizing when the jet liquid column strikes the workpiece on the machining point.

Abstract: A laser machining method, including: liquid supplying into a rectifying chamber; the rectifying chamber attenuating disturbances in flow of the liquid supplied; a liquid injecting into a liquid oscillating chamber exclusively from one direction from a liquid inlet port arranged on only one portion of a sidewall of the liquid oscillating chamber; the liquid jetting as a jet liquid column into air from a nozzle; a laser beam focusing on the axis of the nozzle and guiding to a machining point by the jet liquid column; a surface wave of the jet liquid column generating and gradually increasing in amplitude in the direction away from the nozzle; a body of the jet liquid column atomizing when the jet liquid column strikes the workpiece on the machining point.

Abstract: Laser machining method, including: liquid supplying into rectifying chamber; rectifying chamber attenuating disturbances in flow of liquid supplied; liquid injecting into liquid oscillating chamber exclusively from one direction from liquid inlet port arranged on only one portion of sidewall of liquid oscillating chamber; liquid jetting as jet liquid column into air from nozzle; laser beam focusing on axis of nozzle and guiding to machining point by jet liquid column; surface wave of jet liquid column generating and gradually increasing in amplitude in direction away from nozzle; a body of jet liquid column atomizing when jet liquid column strikes workpiece on machining point. Liquid flows from oscillating chamber inlet path for guiding liquid from rectifying chamber to oscillating chamber inlet port, oscillating chamber inlet path guiding liquid along window from one direction of liquid oscillating chamber to oscillating chamber inlet port.

Abstract: To provide an abrasive water jet machining apparatus in which the machining accuracy and machining efficiency is improved by improving the flowability of an abrasive through a nozzle. An abrasive water jet machining apparatus performs machining by directing an abrasive water jet at a workpiece, the abrasive water jet being composed of a mixture of a high-pressure processing fluid with an abrasive. The machining apparatus includes: a nozzle that directs the abrasive water jet; a high-pressure water supply device that supplies the processing fluid to the nozzle; and an abrasive supply device that supplies the abrasive to the processing fluid. The abrasive is composed of a coated abrasive, the coated abrasive being produced by coating a surface of an abrasive material composed of abrasive grains with a water-repellent material or flow promoting material. The abrasive supply device 8 supplies the coated abrasive to the nozzle.

Abstract: Provided is an abrasive water jet nozzle comprising a mixing chamber for absorbing the abrasives with air through a supply port; a water nozzle; a mixing nozzle disposed on the downstream side against the water nozzle, to mix the abrasives in a water jet jetted out of the water nozzle, and to jet the water jet into the mixing chamber out of a through hole of the mixing nozzle; and an abrasive nozzle disposed on the downstream side against the mixing nozzle, to introduce the water jet thereinto to jet an abrasive water jet. A diameter of the through hole is larger than that of the water nozzle so that the abrasives in the mixing chamber are absorbed with air in a clearance between the through hole and the water jet passing through the through hole to mix the abrasives in the water jet.

Abstract: A laser machining apparatus that allows efficient machining of a workpiece includes a nozzle for jetting a jet liquid column, a rectifying chamber attenuating disturbances in flow of liquid, a liquid oscillating chamber guiding the liquid flowing from the rectifying chamber to a nozzle inlet opening, a laser oscillator generating a laser beam, a focusing optical system focusing the laser beam generated by the laser oscillator above the nozzle inlet opening so that the laser beam is guided by the jet liquid column, and a window opposed to the nozzle inlet opening so that the laser beam transmitting from the focusing optical system enters the liquid oscillating chamber. The liquid oscillating chamber increases a surface wave on an outer surface of the jet liquid column so that the jet liquid column jetted from the nozzle onto a workpiece is easily atomized at a machining point.