How to do the cutting work of SS400 heavy plate

In the cutting of SS400 heavy plate, the temperature decreases from the upper surface downward. At the beginning of cutting, the oxygen pressure gradually increased, and finally reached consistency in the thickness direction of the SS400 steel plate. This results in inconsistent combustion in the thickness direction of the SS400 steel plate at the starting position of cutting, and defects in the starting end of the workpiece. To avoid defects, SS400 steel plate manufacturers can use the following methods:

1. Use circular arc feed to increase the lead-in length and avoid direct cut-in points. This method has a better effect and is widely used in production. Its disadvantage is that it wastes materials.

2.Use ignition rod. The method is to add a piece of steel plate to the thickness of the SS400 heavy plate at the cut-in point. There should be no gap at the close position. The cutting knife should be cut from the ignition rod. The ignition rod will guide the cutting moment flame to the bottom of the SS400 steel plate, making the burning speed of SS400 steel plate up and down consistent, and the best cutting section surface is obtained. The ignition rod can be replaced with cut off scraps. This method reduces the distance between the workpiece and the edge of the plate, reduces the generation of leftover materials, and effectively improves the utilization rate of the plate. The ignition rod is more practical in cutting SS400 heavy plate.