It is one of the important material removal techniques, where a collection of material-working processes are applied. Power-driven machine tools like drill presses, lathes and milling machines are used to cut metal pieces. Mechanist is the person who specializes in machining process.

Today, you'll also come across many machine shops located around your city. At these places machining is done for room, building or company. Remember that machine is not a single process but a group of processes. However, the most common part of all machining process is the use of a cutting tool to form a chip.

To perform machining process, relative motion is required between the metal tool and machine. This motion is usually achieved by means of a primary motion called cutting speed. Most of the machining processes follow a four steps procedure:

• Roughing: In this step, bulk of waste materials are quickly removed with the help of a ripper cuter.
• Semi Roughing: In this stage, a small cutter than a roughing is used.
• Semi Finishing: Then, a large nosed cutter start to form the final profile of the workpiece.
• Finishing: It is one of the longest processes of all. In this step a small nosed cutter traverse across the metal surface to produce the finished shape.

• Machining
• Photochemical machining
• Design for Manufacturability for CNC machining

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