What kind of material is usually used for machine bed castings?

Most of the machine tool bed casting materials are made of gray iron cast iron, and the induction melting furnace is used to melt the cast iron. There are also a very small number of cast steel machine tool beds. The proportion of modern machine tool bed designs that are welded with structural steel is gradually increasing. The machine bed castings have good dimensional stability, and they are not suitable for deformation when used to make the machine bed, which is conducive to maintaining the accuracy of the machine tool for a long time.

Machine tool castings

1. The cast iron machine bed has good casting performance, which is convenient for casting various complex structures;

2. Although cast iron has lower tensile strength compared with steel, its compressive strength is close to that of steel. Most machine tools have low requirements for tensile strength and can fully meet the performance requirements;

3. The cast iron material has good shock absorption performance, which is beneficial to avoid vibration when the machine tool is running and reduce noise.

4. Compared with general steel, the cast iron bed casting has good corrosion resistance, which is convenient to maintain the precision of the machine tool guide.

1. The cast bed made of gray iron has good lubrication performance, the micropores in the structure can hold more lubricating oil, and the carbon element contained in it has a self-lubricating effect.