Thin steel plate laser cutting method

Abstract

The invention relates to a thin steel plate laser cutting method. The method comprises the following steps that (1) a layer of oil is brushed on the surface of a to-be-cut thin steel plate; (2) a laser cutting machine is started up for trial operation, the laser cutting machine enters the next step of operation if the operation result is normal, overhauling is carried out if the operation result is abnormal, and then trial operation is repeated; (3) the oil-brushed to-be-cut thin steel plate is conveyed onto a cutting table; (4) a laser tool bit is subjected to focus fixing to be between the position 5 mm below the surface of a workpiece and the position 2 mm above the surface of the workpiece; (5) after the advancing direction and the distance of the cutting tool bit are adjusted, cuttingis started to be completed in the cutting direction, and the cutting speed of the cutting tool bit is adjusted to be 600-1,000 cm / min; and (6) after cutting is finished, the laser cutting machine isshut down. The layer of oil is firstly brushed on the surface of the thin steel plate before cutting, rapid dissipation of the temperature is accelerated, the power of a laser device is increased, thecutting speed is increased, the temperature difference of different areas near a cutting area of the thin steel plate is reduced as much as possible, the pattern warping phenomenon in the cutting process is prevented, and the machining precision and the machining efficiency are improved.

Description

technical field

[0001] The invention relates to the field of steel plate cutting structures, in particular to a thin steel plate laser cutting method. Background technique

[0002] The application of laser cutting machine in metal plate cutting is very popular. Compared with traditional processing methods, laser cutting has the advantages of high precision, smooth cutting section and flexible cutting shape. Its principle is to use electro-optic conversion lasers to convert electrical energy into high-energy light energy and irradiate the steel surface to gasify or melt the steel in the irradiated area.

[0003] Then, when the thin steel plate is cut in the prior art, it often occurs that the cut thin steel plate is warped. Contents of the invention

[0004] The technical problem to be solved by the present invention is to provide a thin steel plate laser cutting method, which solves the problem that in the prior art, when cutting thin steel plates, the warping phenomenon ...