Continuous laser and ultrasonic composite surface micromachining system and method

Abstract

The invention discloses a continuous laser and ultrasonic composite surface micromachining system and method. The system comprise a lens for focusing a laser beam of a continuous laser on a target material, a laser action time adjusting device and a target material up-down vibration amplitude adjusting device; the target material up-down vibration amplitude adjusting device comprises an ultrasonicamplitude transformer controlled by an ultrasonic generator, the amplitude transformer is mounted on a CNC numerical control platform through a fixing clamp, and the target material is mounted on theamplitude transformer; and the laser action time adjusting device comprises a light blocking turntable which controls the rotating speed of a speed regulator, light transmission ports for adjusting the laser passing ratio are uniformly distributed on the upper circumference of the light blocking turntable, and the position of the light blocking turntable between the lens and the target material is adjusted by a lifting mechanism and a left-right moving mechanism. According to the continuous laser and ultrasonic composite surface micromachining system and method, the surface performance of thetarget material is improved by utilizing the laser melting quenching principle, the target material is fixed on the ultrasonic amplitude transformer, the convection heat exchange of the surface of the target material is accelerated, the cooling effect is enhanced, the molten slag is thrown out, the processing area is homogenized, and grains are refined.

Description

technical field [0001] The invention relates to laser processing technology, in particular to a continuous laser and ultrasonic composite surface micromachining system and method. Background technique [0002] Due to its continuous and stable laser energy output, continuous laser is often used to complete laser cutting, laser welding and laser cladding. It has higher processing efficiency than pulsed laser, but continuous drilling with continuous laser (such as regular array Pits) and surface treatment (such as groove texture) are relatively difficult, because continuous laser is not conducive to continuous drilling operations, and the effect of continuous laser will affect the processing dimensional accuracy and substrate structure due to excessive heat input. [0003] Laser melting and hardening technology uses laser beams to heat the surface of the substrate above the melting temperature. Due to the internal heat conduction cooling of the substrate, the surface of the mol...

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Problems solved by technology

Laser surface texturing technology uses laser rapid melting to process a certain shape and distribution of micro-topography on the surface of the workpiece. This technology has fast processing speed, no pollution to the environment and good shape and size controllability. It is mainly used to optimize surface tribology. characteristics, improve the performance and service life of parts, laser texture is often processed by pulsed laser, but there is a certain inhomogeneity in the processing area during the processing, mainly because of the accumulation of some slag

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