Combined processing head capable of emitting laser and liquid jet to produce abrasive flow and working method thereof

A combined processing head capable of emitting a laser and a liquid jet to produce an abrasive flow, comprising:

• a jetting mechanism comprising a connection portion, wherein the connection portion includes a passage in communication with a nozzle and inner space of a lens cylinder, one end of the connection portion is connected to the lens cylinder, the other end of the connection portion is connected to the nozzle and extends into the nozzle, the part of the connection portion extending into the nozzle includes a flange in close contact with a side wall of the nozzle, the part of the connection portion extending into the nozzle and the side wall of the nozzle form an annular cavity, the flange includes a plurality of through holes, the through holes are in communication with the annular cavity and inner space of the nozzle, a liquid injection port configured to inject a saturated salt solution at a set pressure into the annular cavity is at a position on the side wall of the nozzle at which the annular cavity is located, after the annular cavity is filled with the saturated salt solution, the saturated salt solution flows through the through holes and is ejected from the nozzle, preventing the solution from forming turbulence to affect irradiation and propagation of a laser beam, wherein
• the connection portion comprises a first connecting section, a second connecting section, and an extension section,
• the first connecting section is threadedly connected to the lens cylinder,
• the second connecting section is threadedly connected to the nozzle,
• the extension section extends into the nozzle,
• an outer diameter of the extension section is less than an inner diameter of the side wall of the nozzle, and
• the extension section and the side wall of the nozzle form the annular cavity;
• and
• a cooling mechanism comprising a cooling cylinder having openings at two ends, and a cooling tube in the cooling cylinder that is configured to cool the saturated salt solution ejected from the nozzle and flowing through the cooling cylinder, wherein
• the lens cylinder is fixedly connected to a first connecting plate,
• the cooling mechanism is connected to the first connecting plate by a second connecting plate,
• the second connecting plate includes an adjustment slot,
• an adjustment bolt passes through the adjustment slot, and
• the second connecting plate is fixedly connected to the first connecting plate by the adjustment bolt to allow cooling of the saturated salt solution at different positions so that fine grains are precipitated from the saturated salt solution.