WITH EFFECT FROM THE ACADEMIC YEAR 2012 - 2013

 

ME 352

 

METAL CUTTING & MACHINE TOOL DESIGN

 

Instruction                                             4               Periods per week

Duration of University Examination     3               Hours

University Examination                         75             Marks

Sessional                                                25             Marks

 

UNIT-I

 

Cutting Tool Materials: High carbon steel, HSS, Stellites, Carbides, Coated carbides, Diamonds. Tool material properties.

 

Tool Geometry: Nomenclature of single point cutting tool by ASA & ORS systems. Geometry of drills, milling cutters.

 

Chip Formation: Types of chips, BUE, Chip breakers.

 

Machining: Orthogonal and oblique cutting, Mechanics of metal cutting, Merchant’s analysis, Shear angle, Solutions of Merchant and Lee & Shafer.

 

UNIT-II

 

Thermal Aspects of Metal Cutting: Sources of heat and heat distribution, Various methods of measurement of temperature, Cutting fluids and applications.

 

Tool Wear, Tool Life and Machinability: Types of wear, mechanism of tool wear, Tool life & Machinability, Machinability index. Taylor’s tool life equation.

 

Economics of Machining: Tool life for maximum production, minimum cost.

 

UNIT-III

 

Machine Tools: Constructional features and specifications of machine tools, various operations on Lathe, Types of Lathes, capstan and turret Lathes, Drilling, Milling and, Boring machines. Indexing methods. Differences between shaper, planer and slotter. Tool holding and work holding devices. Quick return mechanisms.

 

UNIT-IV

 

Grinding Machines: Types of grinding, Abrasives and bonds used for grinding wheels. Specification and selection of grinding wheels. Broaching, Lapping, Honing, Polishing, Buffing and super finishing, Burnishing.

Screws and Gear Manufacturing: Tapping, Chasers, Thread rolling, Thread milling, thread grinding. Gear shaping, Gear hobbing, Gear shaving and grinding.

 

UNIT-V

 

Jigs and Fixtures: Design principles for location and clamping. Quick clamping devices. Types of Jigs and fixtures.

 

Unconventional Machining: Principles of working and applications of USM, AJM, EDM, ECM, LBM and EBM (Mechanism and Theory of MRR and Process parameters in each case).

 

Suggested Reading:

 

1. 1.B.L. JuneJa and Shekon, "Fundamentals of Metal Cutting & Machines Tools", Wiley Eastern Ltd. 1987.

 

1. 2.P.N. Rao, "Manufacturing Technology – Metal Culling & Machine Tools", Vol. 2, Tata McGraw Hill Education Pvt. Ltd, 2010.

 

1. 3.Amitab Ghosh and Mallick, "Manufacturing Science", Affiliated East West Press 1985.

 

1. 4.P.C, Pandey & Shan HS, "Modern Machining Process", Tata McGraw-Hill Education 1980.

 

1. 5.A. Bhattacraryya, “Metal Cutting Theory and Practice” New Central Book Agency (P) Ltd., Calcutta, 1996.