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How To Solve The Problem Of Laser Cutting And Burning Edge?

- Jan 18, 2019 -

The laser cutting machine will burn edge and slag when processing sheet metal, which not only affects the precision and appearance of the product but also reduces the product quality and brings great economic losses to the enterprise. So how do you effectively avoid and deal with this problem?

Reasons for processing the edge of the metal laser cutting machine:

The metal laser cutting machine generates a large amount of heat when processing the sheet metal. Under normal circumstances, the heat generated by the cutting is diffused along the slit into the processed sheet metal to be sufficiently cooled. In the processing of the small hole of the metal laser cutting machine, the outside of the hole can be sufficiently cooled, and the small hole portion inside the single hole is small in space due to heat diffusion, and the heat energy is too concentrated to cause overburning and drossing. In addition, in the slab cutting, the molten metal accumulated on the surface of the material and the accumulation of heat generated during the perforation may cause the auxiliary airflow to be turbulent and the heat input to be excessive, thereby causing over-burning.

Solution:

1. Metal laser cutting machine produces a method of over-burning in the cutting of carbon steel holes: In the cutting of carbon steel with oxygen as the auxiliary gas, the key to solving the problem is how to suppress the heat of oxidation reaction. A method of assisting oxygen during perforation and switching to auxiliary air or nitrogen for lag can be used. This method can process up to 1/6 thick plate holes. The pulse cutting conditions of low frequency and high peak output power have the characteristics of reducing heat output and contributing to the optimization of cutting conditions. The condition is set to a single pulsed laser beam, a high peak output with high energy intensity, and a low frequency condition, which can effectively reduce the accumulation of molten metal on the surface of the material during the perforation process, and effectively suppress the heat output.

2. Solution of metal laser cutting machine in aluminum alloy and stainless steel cutting: In the processing of such materials, the auxiliary gas used is nitrogen, and no burning occurs during cutting, but the temperature of the material inside the small hole Very high, the internal slag phenomenon will be more frequent. An effective solution is to increase the pressure of the auxiliary gas and set the condition to a high peak output, low frequency pulse condition. The auxiliary gas uses air as well as when nitrogen is used. It does not burn too much, but it is easy to slag at the bottom. It is necessary to set the conditions to high auxiliary gas pressure, high peak output, and low frequency pulse conditions.