Optical fiber laser cutting blade type hole energy regulation method for sheet metal

Abstract

The invention belongs to the technical field of efficient, high-precision and high-quality laser cutting forming of metal plates, and relates to an optical fiber laser cutting blade type hole energy regulation method for sheet metal. The method comprises the following steps that firstly, a machining graph is reasonably segmented, so that the whole machining graph is divided into four sections, theregion with the larger arc radius difference is divided into an individual line segment, then a method for combining four-section variable-speed and variable-power energy compensation is adopted to reduce erosion and slag adhering of a small arc section in the machining process in a mode of energy regulation and control on separate lines of the sheet metal in the laser cutting process, the energycaused by heat dissipation and heat accumulation is balanced by reducing the laser energy density at a small arc radius part of the sheet metal, the cutting precision is improved, erosion and slag adhering are reduced, and the large arc profile error meets the technical requirements.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency, high-precision, and high-quality laser cutting and forming of metal plates, and relates to a method for regulating the energy of leaf-shaped holes in optical fiber laser cutting of metal sheets. Background technique [0002] Laser cutting is the process of removing and separating materials by irradiating high-power-density laser beams on the surface of materials to melt or gasify them. Modern laser cutting technology is a high-tech combination of lasers, computers, numerical control systems and precision machine tools. Laser cutting With high precision, high efficiency, low damage and easy control, it has become the most widely used technology in laser processing. The aviation turbofan engine has a large number of airfoil holes. After the blades are inserted into the airfoil holes, they are fixed by brazing. In order to generate capillary action during brazing without causing the solder t...

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Problems solved by technology

[0004] Aiming at the problem of uneven energy distribution on the cutting line in the process of fiber laser cutting leaf-shaped holes on metal sheets, resulting in corner ablation of the upper surface and serious slag hanging on the lower surface, the present invention proposes an energy control method for leaf-shaped holes cut by fiber laser laser cutting of metal sheets , is a laser cutting method that uses fiber laser to process leaf-shaped holes in thin metal plates, and uses energy regulation and balance heat accumulation and heat dissipation for lasers with visualized processing graphics. Reasonable segmentation of processing lines can reduce burnout. corrosion and slag

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