What process is used to shape machine beds?

The process used to shape machine beds is milling followed by precision grinding. Milling involves removing material from a solid block to create the desired shape and dimensions of the machine bed. It allows for high precision and the ability to create complex geometries that are often required in machine components.

After milling, precision grinding is typically employed to achieve a smooth surface finish and tighter tolerances. This step is crucial because machine beds must be exceptionally flat and stable to ensure the accuracy of the machinery that operates on them. The combined use of these two processes provides the necessary strength, durability, and surface characteristics needed in a machine bed, making it suitable for supporting other components and maintaining operational precision.

The other processes listed are less suited for shaping machine beds due to their specific applications: injection molding is primarily used for plastic components, stamping is used for metal forming typically in mass production, and extrusion is used to create long shapes of material with a consistent cross-section, none of which are appropriate for the high precision required in machine beds.