Machining head for a water jet cutting machine and aiming device intended to equip such head

Machining head for a water jet cutting machine, including:

• a casing (2) adapted to be fixedly mounted on the cutting machine (D),
• admission means (28) adapted to be coupled to a feed source (A) of water under pressure,
• an acceleration nozzle (22) fixed to the casing (2) and connected to the admission means (28), said nozzle (22) being intended to form a jet (J) of water at high velocity, suitable to effect cutting of a material,
• a cutting pipe (60) arranged to receive the water jet (J) emitted by the acceleration nozzle (22), and
• a pipe carrier (62) maintaining the cutting pipe (60) in position relative to the casing (2),
• regulating means (120a, 120b, 112, 94a, 94b) which permit regulation of the position of the pipe carrier (62) relative to the casing (2) in order to adjust the orientation of the cutting pipe (60) in a manner coaxial to the jet (J) emitted by the nozzle (22),
• characterized in that said regulating means comprise an aiming device 120a, 120b) including a target (128a, 128b) mounted to a support (122) arranged so as to be able to be mounted in said pipe carrier (62).