Manufacturing science and technology 3-1 IP engineering K L university




UNIT I

Introduction to Metal Cutting and metal removal processes, types of cutting tools, geometry of single point cutting tool, Nomenclature of single point cutting tool according to American and orthogonal rake systems, Geometry of drill bit and Milling Cutter, types of milling cutters.

MECHANICS OF METAL CUTTING: Types of cutting – Orthogonal and oblique cutting, mechanics of orthogonal cutting – Chip formation , determination of shear angle and chip thickness ratio, forces on chip, Merchant circle diagram, force relations, stresses,

UNIT II

MECHANICS OF METAL CUTTING: Shear strain, Merchant shear plane theory, velocity relations, types of chips, builtup edge formation, chip breakers. Related simple problems

CUTTING TEMPERATURES: Thermal energy in cutting, sources of heat, Experimental techniques for measuring tool temperatures.

UNIT III

CUTTING FLUIDS: Types of cutting fluids, selection, and applications.

MACHINABILITY: Introduction, various criteria for Machinability Index.

TOOL WEAR : Wear Mechanisms ( Causes of Wear) – Adhesion wear, Abrasion wear, Diffusion wear and other wears. Types of tool failure – crater wear, flank wear.

UNIT - IV

TOOL LIFE: Tool life criteria, Variables effecting, Tool life plots – Choice of cutting speed and tool life for minimum cost and maximum production and related Problems

MEASUREMENT OF CUTTING FORCES: Forces in turning, drilling and plain milling operations, Introduction to Dynamometers, Measurements of cutting forces in Lathe, drilling and plain milling processes using dynamometers

UNIT V

CUTTING TOOL MATERIALS: Desirable properties of Tool materials, Major types of tool materials, Constituents, characteristics – Carbon steels, High speed steels, cast alloys, cemented carbides, ceramics, coated tools and diamond tools. Selection of tools for various materials to be cut, properties.



TEXT BOOKS:

1. Metal Cutting Principles – M.C.Shaw.
2. A text book of Production Engg. – P.C.Sharma.
3. Production Technology – H.M.T

REFERENCE BOOKS:

1. Fundamentals of Metal Machining & Machine Tools – G.Booth Royd.
2. Fundamentals of Metal Cutting & Machine Tools by juneja & Sekhon


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