Which of the following processes is commonly used in precision machining?

Milling is commonly used in precision machining due to its ability to accurately cut and shape materials to very tight tolerances. This process involves the use of a rotating cutting tool that moves across the workpiece, removing material in precise amounts. Milling machines come in various configurations, such as vertical and horizontal, allowing for a wide range of machining operations, including face milling, slot milling, and contour milling.

The precision aspect of milling makes it an ideal choice for manufacturing components that require high accuracy and a good surface finish. It can work with various materials, including metals and plastics, which makes it versatile in different industries, such as aerospace, automotive, and medical.

In comparison, welding is primarily a joining process rather than a machining operation, and it doesn’t focus on shaping or forming the material in the same way milling does. Forging and casting are also methods of forming materials, but they do not typically achieve the same level of precision and surface finish that milling provides. Both processes often involve shaping materials through heating or molding, which can introduce variabilities that precision machining seeks to eliminate. Hence, milling stands out as a key process in precision machining for its accuracy and versatility.