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Milling

Milling is the process of cutting away materialby feeding a work piece past a rotating

multiple tooth cutters. The cutting action of

the many teeth around the milling cutterprovides a fast method of machining. The

machined surface may be flat, angular, or

curved. The surface may also be milled to any

combination of shapes. The machine for

holding the work piece, rotating the cutter,

and feeding it is known as the

Milling machine

http://www.mfg.mtu.edu/marc/primers/milling/millmach.htmlhttp://www.mfg.mtu.edu/marc/primers/milling/millmach.html

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METHODS OF MILLING

Up millingis also referred to as conventionalmilling. The direction of the cutter rotation

opposes the feed motion. For example, if the

cutter rotates clockwise , the work piece is fed

to the right in up milling.

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METHODS OF MILLING

Down millingis also referred to as climbmilling. The direction of cutter rotation is same

as the feed motion. For example, if the cutter

rotates counterclockwise , the workpiece is fed

to the right in down milling

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Milling cutters

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Three Important Elements for

Milling

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Cutting of Bottom Surface

http://www.nmri.go.jp/eng/khirata/metalwork/milling/endmill/step02_big.jpg

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Cutting of Side Surface

http://www.nmri.go.jp/eng/khirata/metalwork/milling/endmill/step03_big.jpg