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Residual stress is inevitably generated during the cooling and solidification of machine tool gray iron castings such as machine beds, columns and worktables. Unrelieved residual stress will release slowly during long-ter...

Sand inclusion is one of the most frequent surface and internal defects for large gray iron machine tool castings including beds, columns and worktables. It arises when broken molding sand is washed into molten iron durin...

Annealing is an indispensable heat treatment process for gray iron machine tool castings including machine beds,columns and worktables.It mainly targets massive residual stress generated during casting cooling and optimiz...

Rigidity is the core performance indicator of machine tool castings including beds, columns, worktables and spindle boxes. When castings lack enough structural stiffness, a series of precision, processing and service fail...

Shrinkage cavities are hollow voids formed inside machine tool gray iron castings during solidification, mainly appearing at thick bosses, rib junctions, wall-thickness mutation areas and isolated heavy sections. They are...

Long-term service deformation of machine tool castings (bed, column, worktable cast iron castings) stems from latent internal casting stress, alternating workshop loads, thermal circulation, continuous vibration and struc...

Machine tool castings such as machine bases, columns and worktables are mostly made of gray cast iron. Subject to melting, molding, pouring and cooling processes, various internal and surface casting defects are easily fo...

Regular maintenance is essential to retain flatness accuracy,prevent rust,and extend the service life of cast iron inspection platforms.Routine maintenance can be divided into daily,weekly,monthly and annual standardized ...