Casting dressing for cleaning castings

Includes removing gates and risers, adding meat, lace, cutting ribs, burrs and burrs, and polishing and leveling the casting surface. Up to now, most castings mainly rely on hand tools and semi-mechanized tools such as air impact, air shovel, high-speed portable grinding wheel and hanging grinding wheel. General punching machines and sawing machines are also used for castings with less complicated shapes. When the casting batch is large, the automatic operation is realized by using special machine tools or special production lines. Most steel castings are cut by oxygen or electric welding. Electro-gas cutting is a method of melting or oxidizing metal by using the high temperature generated by the arc formed between the electrode and the casting, and at the same time blowing the melt clean with high pressure and high speed airflow to remove the flash, burr and protrusion of the casting. This method can not only be used to cut the riser, but also make the casting surface smooth. However, electro-pneumatic cutting has the disadvantages of arc, smoke and noise.