THEORY OF METAL MACHINING

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Why Machining is Important• Variety of work materials can be machined Most frequently applied to metals• Variety of part shapes and special geometryfeatures possible, such as: Screw threads Accurate round holes Very straight edges and surfaces• Good dimensional accuracy and surface finish©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Disadvantages with Machining•Wasteful of materialChips generated in machining are wasted material,at least in the unit operation•Time consumingA machining operation generally takes more timeto shape a given part than alternative shapingprocesses, such as casting, powder metallurgy, orforming©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Page 6 and 7: Machining in the Manufacturing Sequ
Page 8 and 9: TurningSingle point cutting tool re
Page 10 and 11: MillingRotating multiple-cutting-ed
Page 12 and 13: Figure 21.4 - (a) A single-point to
Page 14 and 15: Cutting Conditions for TurningFigur
Page 16 and 17: Machine ToolsA power-driven machine
Page 18 and 19: tr tChip Thickness Ratioocwhere r =
Page 20 and 21: Figure 21.7 - Shear strain during c
Page 22 and 23: Figure 21.8 - More realistic view o
Page 24 and 25: Segmented Chip•Brittle work mater
Page 26 and 27: Continuous with BUE•Ductile mater
Page 28 and 29: Forces Acting on Chip•Friction fo
Page 30 and 31: Coefficient of FrictionCoefficient
Page 32 and 33: Cutting Force and Thrust Force•Fo
Page 34 and 35: The Merchant Equation•Of all the
Page 36 and 37: •Higher shear plane angle means s
Page 38 and 39: Power and Energy RelationshipsIn U.
Page 40 and 41: Unit Power in Machining•Useful to
Page 42 and 43: Cutting Temperature•Approximately
Page 44: Cutting Temperature•Experimental

THEORY OF METAL MACHINING

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