Solutions for Overburning in Metal Laser Cutting Machines

Metal laser cutting machines generate significant heat during sheet metal processing. Under normal conditions, the heat produced by cutting diffuses along the cut seam into the processed sheet metal, achieving adequate cooling. However, when cutting small holes, while the outer perimeter receives sufficient cooling, the inner portion of the hole suffers from excessive heat concentration due to limited diffusion space. This leads to overburning, slag adhesion, and other issues. Additionally, during thick plate cutting, molten metal accumulation on the surface and heat buildup during piercing can disrupt the auxiliary gas flow and cause excessive heat input, triggering overburning.

1. Solution for burn-through in small-hole cutting of carbon steel with metal laser cutting machines: When cutting carbon steel using oxygen as the auxiliary gas, the key to resolving this issue lies in suppressing the generation of heat from oxidation reactions. A method involves using auxiliary oxygen during piercing, followed by a delayed switch to auxiliary air or nitrogen for cutting. This approach can process small holes in plates up to 1/6 inch thick. Pulse cutting conditions featuring low frequency and high peak power output reduce heat input, aiding in process optimization. Setting parameters for a single-pulse laser beam with high peak energy intensity and low frequency effectively minimizes molten metal accumulation on the material surface during piercing, thereby suppressing heat input.

2. Solutions for Metal Laser Cutting Machines in Aluminum Alloy and Stainless Steel Cutting: When processing these materials, nitrogen is used as the auxiliary gas. While edge burning does not occur during cutting, high temperatures inside the keyhole frequently cause slag buildup on the inner surface. An effective solution is to increase the auxiliary gas pressure and set conditions to high peak power output with low pulse frequency. When using air as the auxiliary gas, overburning does not occur, similar to nitrogen. However, slag buildup at the bottom becomes common. Conditions should be set to high auxiliary gas pressure, high peak power output, and low-frequency pulse settings.

For more information on laser marking machines, laser welding machines, and laser cutting machines, please visit the official website of Wuxi Top Optics Laser Technology Co., Ltd.: http://www.tollaser.com