FORMING
Forming is the process of turning convex, or concave or of any irregular shape. Form turning may be accomplished by the following methods:
1.using a forming tool
2.combining cross-land longitudinal feed.
3.tracing or coping a template.
DRILLING
Drilling is the operation of producing a cylindrical hole in a work piece by the rotating cutting edge of a cutter known as drill.
REAMING
Reaming is a process of finishing and sizing a hole, which has been drilled or bored. The tool used is called reamer, which has multiple cutting edges. The reamer is held on tailstock spindle, either direct or through a drill chucks and is held stationary while the work is revolved at a very low speed. The feed varies from 0.5 to 2mm per revolution.
BORING
Boring is the operation of enlarging and truing a hole produced by drilling, punching, casting or forging.
1.The work is revolved in a chuck or a faceplate and the tool, which is fitted to the tool post, is fed in to the work.
2.The work is clamped on the carriage and a boring bar holding the tool is supported between the centers and made to revolve.
fr. NTTF ( NETTUR TECHNICAL TRAINING FOUNDATION)
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