Laser Cutting Fast Zoom Perforation Method

Abstract

The invention discloses a laser cutting rapid zooming mechanism and a rapid zooming punching method in the technical field of laser cutting. The mechanism comprises a cutting head and a reflecting mirror, the reflecting mirror comprises a reflecting lens made of elastic material, the reflecting lens is installed on a sealed cavity, the cavity is connected with a pressure control mechanism, and the surface curvature radius of the reflecting lens is changed along with changes of pressure inside the cavity. When punching is performed, first a nozzle is 5-6 mm away from the surface of a workpiece, internal pressure of the cavity is changed, laser is focused 0.9-1.1 mm above the surface of the workpiece, a pit is formed; the focus moves downwards to 4-5 mm in the workpiece to continue the punching, finally the nozzle moves downwards to 0.9-1.1 mm above the surface of the workpiece, and the reflecting lens is a plane mirror until the laser cutting penetrates the workpiece. According to the mechanism and the method, the workpiece is cut more easily, splashed objects can be prevented from adhering to a focusing lens, punching efficiency is improved, hole exposure is avoided, the punching is stable, and cutting quality is high.

Description

technical field [0001] The invention relates to a plate processing method. Background technique [0002] Laser cutting is to use laser as a processing method to cut metal or non-metal plates. It can process straight lines and curves of any shape on flat plates. It is widely used in electrical manufacturing, automobiles, instrument switches, textile machinery, transportation machinery, Home appliance manufacturing, elevator equipment manufacturing, food industry, decoration and advertising, and laser processing stations, etc. [0003] The process of laser cutting is to irradiate the processing material with a focused high-power-density laser first, so that the irradiated material is rapidly melted and vaporized, and at the same time, the molten material is blown off by the high-speed airflow coaxial with the beam, and a hole is first formed on the workpiece. , and then the motion system drives the cutting device or the workpiece to move, and the laser melts and vaporizes the...

AI Technical Summary

Problems solved by technology

But in fact, adopting this method leads to complex structure of the cutting head, low reliability and high cost. In addition, as the distance between the focusing lens and the surface of the plate decreases, spatters are more likely to adhere to the focusing lens

Therefore, the traditional perforation method will lead to low processing efficiency of machine tools, easy scrapping of cutting parts, and high loss of focusing lenses

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