MILLING MACHINES

Metal cutting operation in which the operating tool is a slow revolving cutter having teeth formed on its periphery

Multipoint cutting tool

Work piece mounted on the movable work table – fed against rotating cutter

MILLING

PRINCIPLE OF MILLING

CONVENTIONAL OR UP MILLING

Workpiece is fed in the opposite direction to the cutter

Chip that removed gets progressively thicker

When making deep cuts, the cutter tend to pull the workpiece out of the vice since the cutting force is directed upward at an angle

PRINCIPLE OF MILLING

CLIMB OR DOWN MILLING

Workpiece is fed in the same direction as that of the cutter

Chip that removed gets progressively thinner

More metal can be removed for each cut than the conventional milling

PRINCIPLE OF MILLING

1.Plain/ Horizontal Milling machines

2.Vertical

3.Universal

4.Planer type

5.Profile cutting

CLASSIFICATION OF MILLING MACHINES

1. COLUMN & BASE

2. OVERARM, ARBOR, SPINDLE & MILLING CUTTER

3. KNEE & ELEVATING MECHANISMS

4. SADDLE

5. TABLE, VICE & WORKPIECE

MAJOR PARTS OF HORIZONTAL MILLING MACHINE

1. COLUMN & BASE

2. SPINDLE HEAD, SPINDLE MOTOR, MILLING CUTTER

3. KNEE & ELEVATING MECHANISMS- OPTIONAL AS THE SADDLE & TABLE ASSEMBLY CAN BE DIRECTLY MOUNTED ON THE BASE ITSELF.

4. SADDLE

5. TABLE, VICE & WORKPIECE

MAJOR PARTS OF VERTICAL MILLING MACHINE

1.PLAIN OR SLAB MILLING

2.END MILLING

3.SLOT MILLING

4.ANGULAR MILLING

5.FORM MILLING

6.STRADDLE MILLING

7.GANG MILLING

8.SLOT MILLING

9.FACE MILLING

MILLING PROCESSES/OPERATIONS

PLAIN OR SLAB MILLING

END MILLING

SLOT MILLING

FORM MILLING

STRADDLE MILLING

FACE MILLING

FACE MILLING

GANG MILLING