Wet blasting treatment device and wet blasting treatment method

A wet blasting treatment device comprising:

• a first nozzle unit configured to discharge, toward a target treatment region, slurry in which a first liquid and abrasive grains are mixed;
• a second nozzle unit configured to discharge a second liquid toward an adjacent region adjacent to the target treatment region such that a liquid film is formed in the target treatment region;
• and
• a control unit configured to control a discharge amount of the second liquid discharged by the second nozzle unit such that the liquid film has a predetermined thickness,
• wherein the control unit controls the discharge speed of the second liquid such that a collision direction when the abrasive grains collide with the target treatment region is inclined by a predetermined angle with respect to a discharge direction of the slurry discharged from the first nozzle unit, and
• the predetermined angle is 10 degrees or greater and 30 degrees or less.

A wet blasting treatment device comprising:

• a first nozzle unit configured to discharge, toward a target treatment region, slurry in which a first liquid and abrasive grains are mixed;
• a second nozzle unit configured to discharge a second liquid toward an adjacent region adjacent to the target treatment region such that a liquid film is formed in the target treatment region;
• and
• a control unit configured to control a discharge amount of the second liquid discharged by the second nozzle unit such that the liquid film has a predetermined thickness,
• further comprising a calculation unit configured to acquire an image including the target treatment region and calculate a machining depth of the target treatment region machined by the abrasive grains.

A wet blasting treatment method comprising:

• first discharging of discharging, from a first nozzle unit toward a target treatment region of a surface of a target, slurry in which a first liquid and abrasive grains are mixed to perform machining that cuts the target treatment region;
• second discharging of discharging a second liquid from a second nozzle unit toward an untreated region of the surface of the target adjacent to the target treatment region such that a liquid film of the second liquid is formed in the target treatment region, the untreated region being a region not machined by the slurry, the liquid film decelerating the abrasive grains in the slurry discharged from the first nozzle;
• and
• controlling a discharge amount of the second liquid discharged in the second discharging such that the liquid film has a predetermined thickness, the predetermined thickness being set according to a target value of a machining depth of the target treatment region.

A wet blasting treatment method comprising:

• first discharging of discharging, from a first nozzle unit toward a target treatment region, slurry in which a first liquid and abrasive grains are mixed;
• second discharging of discharging a second liquid from a second nozzle unit toward an adjacent region adjacent to the target treatment region such that a liquid film is formed in the target treatment region;
• and
• controlling a discharge amount of the second liquid discharged in the second discharging such that the liquid film has a predetermined thickness,
• wherein in the controlling, a discharge speed of the second liquid is controlled such that a second speed of the second liquid when the second nozzle unit discharges the second liquid is higher than a first speed of the slurry when the first nozzle unit discharges the slurry,
• wherein in the controlling, the discharge speed of the second liquid is controlled such that a collision direction when the abrasive grains collide with the target treatment region is inclined by a predetermined angle with respect to a discharge direction of the slurry discharged from the first nozzle unit, and the predetermined angle is 10 degrees or greater and 30 degrees or less.

A wet blasting treatment method comprising:

• first discharging of discharging, from a first nozzle unit toward a target treatment region, slurry in which a first liquid and abrasive grains are mixed;
• second discharging of discharging a second liquid from a second nozzle unit toward an adjacent region adjacent to the target treatment region such that a liquid film is formed in the target treatment region;
• and
• controlling a discharge amount of the second liquid discharged in the second discharging such that the liquid film has a predetermined thickness,
• further comprising acquiring an image including the target treatment region and calculating a machining depth of the target treatment region machined by the abrasive grains.