Method for improving quality of water-jet-guided laser machined hole through heat treatment

Abstract

The invention discloses a method for improving the quality of a water-jet-guided laser machined hole through heat treatment, and relates to the field of water-jet-guided laser machining. A material to be machined, an electric heating furnace and a water-jet-guided laser machining device are involved in the method for improving the quality of the water-jet-guided laser machined hole through heat treatment. The method comprises the following step: step 1: the material to be machined is placed in the electric heating furnace. The method is easy to operate, equipment is simple and convenient, the method is suitable for being applied to actual water-jet guided laser machining production, after heating treatment of the electric heating furnace, the interstructure grain boundary effect of the material is weakened, and the material is separated more easily through laser energy in water-jet guided laser, so that the roundness and the taper of the top and the bottom of the machined hole are small, and the machining precision and the machining efficiency of water-jet guided laser are greatly improved; and on the other hand, the machinability of the material is improved through heating of the electric heating furnace, the material is easier to machined, and compared with machining after-treatment such as trimming, grinding and polishing, the method has the advantage of being more economical.

Description

technical field [0001] The invention relates to the field of water conduction laser processing, in particular to a method for heat treatment to improve the quality of water conduction laser processing holes. Background technique [0002] With the continuous development of precision and ultra-precision processing technology, the combination of laser and other processing technologies has gradually become the mainstream technology in the field of processing and manufacturing. Water and laser coupling processing technology is a new type of composite processing technology. Using the propagation difference of water and air optical characteristics, the laser beam is totally reflected in the water column and will not be separated, so as to guide the laser beam to propagate in a broken line in the water beam. , forming a water beam optical fiber, and then processing the workpiece. [0003] In the process of machining holes by water-conducting laser, the processed holes should have t...

AI Technical Summary

Problems solved by technology

For example, in the invention patent application titled a water-guiding laser processing method and system with the publication number CN108581223A, a water beam guiding the laser does not need to be produced by an expensive nozzle with a large aspect ratio, and the coupling of the laser and the water beam is designed. The process does not have the problem of nozzle ablation, and does not require the complex chamber structure in the traditional water-guided laser device. The equipment cost and maintenance cost are significantly reduced. The diameter of the water beam is not limited by the nozzle diameter of the traditional water-guided laser device. The finer water beam further improves the processing accuracy. The laser focus does not need to be precisely positioned at the specific position of the nozzle that produces the water beam. It only needs to be coincident with the deflected water beam that flows vertically downward, reducing the cost of laser focus accuracy. Requirements, reduce the coupling difficulty of the laser beam and the water beam, there is no problem that the liquid droplets gathered around the nozzle pull the water beam, and the laser and water beam deviate from the processing path, so that the quality of water-guided laser processing is stable, but due to the difficult processing of materials , the energy of the existing water-conducting laser processing device is not enough to process the hole features with low roundness at the bottom of the material, which will lead to the addition of subsequent processes to obtain holes with small roundness on the bottom surface, increase processing costs and processing time, and reduce The production efficiency of the water-conducting laser, on the other hand, the method of improving the processing quality by increasing the laser power and other methods requires more investment, which limits its practical application

Images