With neat diagrams explain two metal cutting operations of the lathe machine.

9.A] Explain with neat diagrams, any two metal cutting operations performed on a lathe machine.

Answer:-

1. Facing Operation:

• The operation of machining the ends of a piece of the work to produce a flat surface perpendicular with the axis.
• This is also used to cut the work to the required length.
• The operation involves feeding the tool perpendicular to the axis of rotation of the workpiece.
• A properly ground-facing tool is mounted in a tool holder in the tool post to accomplish facing operation.

2. Turning Operation:

• The process of metal removal from the cylindrical jobs is called straight or plain turning.
• Plain turning operations are generally performed in two steps – rough and finish turning.
• Rough turning is usually done for rolled, cast, or forged parts to remove the uneven or sandy, or rough surface on the jobs.
• A roughing tool does rough and is used for excess stock removal.
• For finishing a tool with a slightly round cutting edge is used.