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Views: 36 Author: Amber Publish Time: 05-08-2021 Origin: Site
The metal laser cutting machine will generate a large amount of heat when processing sheet metal. Under normal circumstances, the heat generated by cutting will diffuse along the cutting seam into the processed sheet metal and be sufficiently cooled. In the processing of small holes in the metal laser cutting machine, the outside of the hole can be sufficiently cooled, but the small hole inside the single hole is likely to cause over-burning, slagging, etc. As a consequence of the small space for heat diffusion and excessive heat energy. What’s more, in the cutting of thick sheets, the molten metal accumulated on the surface of the material and the accumulation of heat generated during the piercing will cause the auxiliary airflow to be turbulent and excessive heat input,resulting in overburning.
1. Add cooling point at the corner
When cutting sharp-angled metal sheets, the location where overburning easily occurs is frequently at the sharp corners. Overburning will cut the sharp corners into rounds. At this time, add a cooling point at the sharp corners and stop at the sharp corners. Click, blow.
2. Use high-power lasers
When cutting carbon steel, a higher power laser can be used, and a bright surface cutting process can be used to effectively avoid overburning, and this cutting process can cut finished products without burrs and bright cut surfaces.
3. Cutting with nitrogen
In sheet metal cutting with oxygen as the auxiliary gas, it can be switched to use nitrogen for cutting. When nitrogen cutting, the material completely relies on laser energy to melt, and nitrogen blows out the slit and avoids inappropriate chemical reactions. The melting point region temperature is relatively low, coupled with the cooling and protection of nitrogen, the reaction is stable and uniform, and the cutting quality is high. The cross section is fine and smooth, the surface roughness is low, and there is no oxide layer.
4. Increase air pressure
When using a fiber laser cutting machine to process aluminum alloy and stainless steel, nitrogen or air is used to be auxiliary gas for cutting, and there’s no edge burning occurring during the cutting process. However, due to the high temperature of the material inside the small hole, the phenomenon of slag hanging inside will be more frequent. In this case, burrs and dross can be reduced by increasing the pressure of the auxiliary gas.
Contact Person: Amber Li
WeChat/WhatsApp: +86 155 5314 9503
Email: amber@lepaion.com
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