What does milling refer to in machining?

Milling in machining refers to a technique that employs rotating cutters to remove material from a workpiece. This process allows for precise shaping and dimensioning of parts, making it a versatile method used in various applications, from cutting flat surfaces to creating complex contours. The rotating cuttings tools, or mills, can move in multiple directions, enabling the creation of intricate designs and details on the material being machined.

In contrast, joining materials pertains to processes like welding or soldering, which do not involve material removal. The reshaping of metal through heating typically refers to methods like forging or casting rather than milling. Finally, polishing metal surfaces is an entirely different operation aimed at enhancing surface finish, rather than removing material to shape it, as is done in milling. The defined role of milling makes it fundamental in machining operations, emphasizing its importance in the metal fabrication field.