mprocesses notes 2

7/29/2019 MProcesses Notes 2

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Metal Cutting

Manufacturing

Processes


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Outline

Metal CuttingChip Formation Processes

ControlConditions

Back rake angle

Shear angle

Chip FormationContinuous formation

Built up edge formation

Discontinuous formation

EffectsChip formationShear angle


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Machining Operations


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Machining Operations


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Machining Operations -

Sawing


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Basic Cutting Face

Cutting


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Basic Cutting Turning

Diameters


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Basic Cutting Thread

Cutting
http://www.5bears.com/gtpics/nutarb03.jpg


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Basic Cutting Surface

Grinding


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Chip Formation

ProcessesControl Feed Speed Depth of Cut

Conditions Machining Process Machine Limitations Material Tool Type Tool material

Surface Finish Tolerances


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Chip Formation

ProcessesBack rake angle, The angle that the tool makes with

respect to a vertical from theworkpiece

The chip is formed by shearingalong the shear plane

The shear plane or shear angle is measured with respect to the

horizontal

Flank of the tool is the bottom ofthe tool not in contact with thematerial (clearance angle )


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Cutting Definitions


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Continuous

Chip Formation


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Built Up Edge

(BUE) Formation


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Discontinuous

Chip Formation


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Three Types of Chips


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Resulting Finishes

of Chip Formation


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Summary

Chip formation processes aredesigned to shear off layers of

metal

Control and conditions determine

the type of chip formation

The type of formation affects the

resulting finish of theworkpiece


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The End

mprocesses notes 2

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