Cutting head for fluid jet machine with indexing focusing device

A cutting head for a waterjet cutting machine, the cutting head comprising:

• a base with a bore and a central axis extending through the bore;
• an orifice member coupled with the base and having an inlet, an outlet, and a passage extending between the inlet and outlet, the passage being configured to increase velocity of fluid flowing through the passage so as to form a fluid jet discharged through the orifice member outlet and generally toward the base bore;
• and
• a fluid focusing device including a generally tubular body with a central passage having an inlet port and a discharge port, the tubular body being at least partially disposeable within the base bore such that the body inlet port is fluidly coupleable with the orifice member outlet, at least one of the tubular body and the base being configured such that the tubular body is separately positionable at one of a finite number of discrete, predetermined angular positions about the base bore axis, the body inlet port being at least generally aligned with the orifice member outlet at each one of the finite number of positions of the body about the axis such that the fluid jet flows from the orifice member outlet through the inlet port and into the central passage.

A cutting head for a water jet cutting machine, the cutting head comprising:

• a base with a bore;
• a fluid focusing device including a generally tubular body with a central passage having an inlet port and a discharge port, the tubular body being at least partially disposeable within the base bore;
• an orifice member having a passage with an outlet, the passage being configured to increase velocity of fluid flowing through the passage so as to form a fluid jet discharged through the outlet;
• and
• a wear insert with a generally cylindrical body with a first end and a second end, a passage extending between the first end and the second, and a body outlet at the second end, the second end being connectable with the base such that the body outlet is disposed generally proximal to the tubular body inlet and the first end being configured to support the orifice member such that the fluid jet from orifice member outlet flows through the insert body passage and the body outlet and into the focusing device inlet port.