The principle of laser cutting: laser cutting involves directing a controlled laser beam onto a metal sheet, causing melting and the formation of a molten pool. The molten metal absorbs more energy, accelerating the melting process. High-pressure gas is used to blow away the molten material, creating a hole. The laser beam moves the hole along the material, forming a cutting seam. Laser perforation methods include pulse perforation (smaller holes, less thermal impact) and blast perforation (larger holes, more splattering, unsuitable for precision cutting).Refrigeration principle of laser chiller for laser cutting machine: the laser chiller's refrigeration system cools the water, and the water pump delivers the low-temperature cooling water to the laser cutting machine. As the cooling water takes away the heat, it heats up and returns to the laser chiller, where it's cooled again and transported back to the laser cutting machine.