New Technology of Laser Cutting Silicon Steel Controlled by Rotating Gas Flow

Abstract

In order to avoid the demerits of currently main laser cutting technology,a novel method of laser cutting silicon steel by using a cyclone slag separator put under the workpiece that will form rotating gas flow to control the direction of the flowing slag gas is presented.Laser cutting of 0.5 mm silicon steel sheet with CO_2 laser is experimentally studied.The experiments prove that glossy and dross-free cutting kerfs can be obtained under lower laser cutting power when the gas flow is laminar flow in the tube controlled by rotating gas flow.The gas flow acting under the workpiece is simulated by finite element method(FEM).The operating law of the rotating gas flow is verified by ANSYS,which provide academic basis for controlling the flowing direction of the slag gas reasonably.