With a neat sketch explain the below operations performed on Milling machine a. Plane Milling b. Slot Milling

1. Plane Milling (also called Slab Milling)

Plane milling is a milling operation used to produce flat horizontal surfaces on the workpiece. It’s the most basic and common milling process.

Key Features:

• Performed using a plain milling cutter.
• The cutter rotates on a horizontal axis.
• The surface produced is parallel to the axis of the rotating cutter.
• Used for machining large flat surfaces like machine bases, plates, etc.

How it works:

• The workpiece is mounted on the table and fed against the rotating cutter.
• The cutter removes material along the surface, creating a flat finish.

2. Slot Milling

Slot milling is the operation of cutting narrow, straight grooves or keyways on the surface of the workpiece.

Features:

• Performed using side and face milling cutters or end mills.
• Can create open slots or closed keyways.
• Slot widths depend on cutter size.
• Used for making keyways, T-slots, grooves in shafts or components.

How it works:

• The cutter moves along the surface of the workpiece and removes material in a straight line to form a groove or slot.
• End mills are used for closed slots, while side milling cutters are used for open slots.

Summary