Method and apparatus for nanocrystallizing a metal surface by shock wave-accelerated nanoparticles

An apparatus for nanocrystallizing a metal surface by shock wave-accelerated nanoparticles comprises:

• a control system, a light guiding system, a workbench control system,. and an auxiliary system;
• wherein the control system comprises an industrial controller, a digital controller, a laser controller and a pressure controller, the digital controller being connected to the laser controller and the industrial controller, the laser controller being connected to a high-power pulse laser device, the industrial controller controlling the laser controller, a spot regulator device and a five-axis linkage workbench via the digital controller, respectively, the laser controller controlling the high-power pulse laser device, the a pressure apparatus controlling pressure of air output from an air tank;
• wherein the light guiding system comprises a light guiding pipe, a pounding head and a spot regulator device, the spot regulator device being located between the high-power pulse laser device and the pounding head and connected to the digital controller, the high-power pulse laser device being located above the spot regulator device while the pounding head is located below the spot regulator device, a focusing lens being located inside the pounding head, the high-power pulse laser device being connected to the spot regulator device through the light guiding pipe, the spot regulator device being connected to the pounding head through the light guiding pipe;
• wherein the workbench control system comprises a digital controller, a workpiece and a five-axis linkage workbench, the workpiece being located above the five-axis linkage workbench, the digital controller regulating the relative position of the workpiece and a nanoparticle nozzle by controlling the five-axis linkage workbench;
• wherein the auxiliary system comprises an air compressor, a paint feeder device, a nanoparticle nozzle, powder feeder device, an exhaust, a sealed working chamber and a metal nanoparticle recycler device, the nanoparticle nozzle being located in the upper part of the sealed working chamber, the nanoparticle nozzle being a hollow cylinder with a ring-shaped inner chamber and a ring-shaped outer chamber, a first spacer being located on a flange of an outer wall on the inside of the inner chamber, a piece of high pressure resistant K9 glass being located between the first spacer and a second spacer and fixed by a top cover, two tapered holes symmetrically distributed along an axis being disposed on the bottom of the inner chamber, a black paint input port in the upper left part of the inner chamber being connected to the paint feeder device, a first nanoparticle input port and a second nanoparticle input port located in the upper part of the outer chamber and symmetrically distributed along an axis being connected to the powder feeder device via an air guiding pipe, respectively, the powder feeder device being connected to the pressure controller via the air guiding pipe, the pressure controller being connected to the air tank via the air guiding pipe, the exhaust and the metal nanoparticle recycler device being respectively connected to the sealed working chamber, the exhaust being located at the left side of the sealed working chamber with the exhaust pipe of the exhaust located in the lower part of the five-axis linkage workbench, the metal nanoparticle recycler device being located on the right side of the sealed working chamber, the exhaust being configured to exhaust air from the sealed working chamber while the metal nanoparticle recycler device being configured to recycle the excess metal nanoparticles.