Final answer:
The main purpose of rough machining is to quickly remove large amounts of material to shape a workpiece into a basic form that approximates the final product, before precision finishing is applied.
Step-by-step explanation:
In rough machining, the main purpose is to remove large amounts of excess material quickly and efficiently from a workpiece. This process is typically the initial stage in the manufacturing process, aiming to transform a raw material into a basic shape that is closer to the final product but does not yet require precision finishing.
Tools such as chisels or other sharp tools are utilized in these processes for carving, where a subtractive method is employed to cut away the unnecessary material. In industrial settings, machinery is often used to handle this task. A common example is the use of a lathe, where a piece of material, such as metal, is rotated on a spindle and a cutting tool is applied to its surface. During this procedure, an operator might need to knock off jagged long pieces of metal to ensure safety and the proper shaping of the object.
Additionally, chemicals or coolants might be applied to the workpiece during the rough machining process to facilitate cutting and to preserve the tool's edge. These actions combined lead to the creation of a rough but approximate shape of the final product, clearing the way for further refining and finishing operations that require more precision.