At present, the laser cutting machine on the market generally has two kinds of aluminum beams and iron beams, the contrast of the two beams, aluminum beams have many advantages: Aluminum beams are generally die-cast aluminum, no bubbles, good strength, the importance of generally within 100 kg, and Tieliang weight is generally about 170 kg, in contrast, aluminum beams light weight, fast speed, 500w-1000w acceleration up to 1.5g, small inertia, can reduce the impact on the gear rack, reduce wear. In cost, the cost of aluminum beams in 25 yuan/kg, while the cost of Tieliang in 7 yuan/kg.