Basic Mechanical Engineering - II

Product: Theory Subject
Categories: Engineering
Department: Common Subjects

Features Includes:

  • 138 - 3D/2D Animation
  • 617 Pages of Content
  • 60 Lecture Hours
  • 108 Quiz
  • Suitable for All Technical University Syllabus

Course Description

This course comprises of automobile engines, the mechanism involves in machines, engineering materials and manufacturing processes.

OBJECTIVES:

  • Understand about automobile engines and power transmission devices
  • Know about the mechanisms and machines
  • Impart knowledge on engineering materials
  • Understand the basic manufacturing processes
  • To interpret about machine tools
UNIT – I AUTOMOBILE ENGINES AND POWER TRANSMISION DEVICES

Introduction - Classification of heat engines - Classification of automobile - History of automobile - Indian auto industry important milestones - Growth of automobiles - Engine basic components - Materials used for engine parts - Engine basic nomenclature. Fuels and its types - Fuel - Types of fuels - Solid fuels - Advantages and disadvantages of solid fuels - Composition and properties of good commercial solid fuel - Liquid fuels - Advantages and limitations of liquid fuels - Composition and properties of common liquids fuels - Gaseous fuels - Advantages and disadvantages of gaseous fuels - Composition and properties of gaseous fuels - Merits and demerits of liquid fuels over solid fuels - Merits and demerits of gaseous fuels over liquid fuels. Fuel system and ignition system of a petrol engine - Fuel system of a petrol engine - Fuel system of diesel engine - Fuel injector - Common Rail System - Types of injector - Multi-point fuel injection system - Control method of injectors - Hybrid engines. Belt, rope and chain - Transmission of power - Introduction to Belt drive - Belt drive - Classification of Belt drives - Types of Flat Belt Drives - Rope drive - Chain drive. Gear drive - Types of Gear - Advantages of Gear Drive over Belt Drive - Gear Nomenclature - Gear Train - Velocity Ratio - Applications of Gear drive - Advantages of Gear Drive - Types of Gear Trains. Clutch - Automobile transmission system - Why clutch is required? - Clutch - Functions of clutch - Principle of friction clutch - Types of clutches - Single plate clutch - Cone clutch. Brakes - Functions of brake - Requirement of automobile brakes - Types of brakes used in various vehicles.

UNIT – II MECHANISMS AND MACHINES

Introduction - Analysis and Synthesis - Kinematic pair - Types of kinematic pairs - Nature of contact - Nature of mechanical arrangement of links - Nature of relative motion between links - Kinematic chain - Condition to form a kinematic chain - Types of kinematic chains. Planar, Spherical, and Spatial Mechanisms - Planar Mechanism - Spherical Mechanism - Spatial Mechanism. Degrees of freedom - Mobility of a mechanism - Kutzbach criterion - Gruebler Criterion - Grashof’s Law - Crank lever mechanism - Double lever mechanism - Double crank mechanism - Mechanical Advantage. Classification of Mechanisms - Inversion of Mechanism - Types of Kinematic Chains - (I) Four Bar Chain or Quadric Cycle Chain - Inversions of Four Bar Chain - Beam engine (crank and lever mechanism) - Coupling rod of a locomotive (Double crank mechanism) - Watt’s indicator mechanism (Double lever mechanism) - (II) Single Slider Crank Chain - Inversions of Single Slider Crank Chain - Pendulum pump or Bull engine - Oscillating cylinder engine - Rotary internal combustion engine or Gnome engine - Crank and slotted lever quick return motion mechanism - Whitworth quick return motion mechanism - (III) Double Slider Crank Chain - Inversions of Double Slider Crank Chain - Elliptical trammels - Scotch yoke mechanism - Oldham’s coupling. Mechanical Engineering Design - Phases and interactions of the design process - Design considerations. Types of Design - Selection Design - Configurational Design - Parametric Design - Original Design - Redesign - Creative Design - Design by Innovation - Adaptive Design. Types of Loads - Load - Types of Loads - Factor of safety - Standards and codes. Economics of Design - Standard sizes - Large tolerances - Breakeven points -Cost estimates. Reliability - Reliability and Probability of Failure. Safety - Safety in Design - Risk Assessment - Risk Reduction.

UNIT – III ENGINEERING MATERIALS

Engineering materials - Introduction - Classification of Engineering Materials - Metals - Non-Ferrous Metals - Non Metals - Importance/Requirements of Engineering Materials - Engineering Materials - Technological Properties - Introduction to Mechanical Properties - Mechanical Properties of Metals - Malleability. Plain Carbon Steel - Alloys of Iron with Carbon - Plain Carbon Steel - Classification of Plain Carbon Steel - Alloying Steel - Effect of Alloying Elements - Effect of Alloying Elements - Alloy Steel - Classification of Alloy Steels - Plain Carbon and Alloy Steels. Powder metallurgy - Importance of powder metallurgy - Steps involved in powder metallurgy - Advantages of Powder Metallurgy - Limitations of Powder Metallurgy - Applications of Powder Metallurgy. Composites - Types of composite materials - Agglomerated materials - Reinforced materials - Types of reinforced materials - Structural composites.

UNIT – IV BASIC MANUFACTURING PROCESSES

Introduction to casting - Metal casting - Powder metallurgy - Foundry - Mould, molten metal and Patterns - Advantages of foundry(Casting) - Limitations of foundry(Casting).Press working - Press working - sheet metal - Types of presses - Press selection - Press Operations - Cutting off - Bending - Drawing - Punching - Blanking - Notching - Lancing - Piercing - Coining - Embossing - Die set components (Press working terminology). Forging - Mechanical working of metals - Hot working - Effects of hot working - Cold working - Effects of cold working - Difference between hot and cold Working - Drop forging - Upset forging - Open die forging - Closed die forging - Press forging. Rolling - Principle of Rolling - Hot Rolling - Cold Rolling. Extrusion - Principle of extrusion - Extrusion mechanism. Soldering and brazing - Fluxes used in Soldering - Soldering equipment - Brazing - Brazing principle - Advantages and applications of soldering and brazing - Comparison between soldering and brazing. Introduction to welding - Types of Welding Process - Classification of Welding - Principle of Gas Welding - Principle of arc welding - Differences between soldering, brazing and welding.

UNIT – V MACHINE TOOLS

Centre lathe - Introduction to lathe - Working principle of lathe - Engine lathe or centre lathe - Specification - Functions and parts of lathe - Headstock - Headstock mechanism - Tailstock - Carriage - Tool post - Apron - Feed and lead screw mechanism - Applications of centre lathe. Lathe operations - Facing - Turning - Grooving - Drilling. Drilling - Parts of drill - Specification of drill - Types of drilling machines. Drilling machines - Sensitive drilling machine - Working of sensitive drilling machine - Radial drilling machine - Classification of radial drilling machine - Advantages. Operations in drilling machine - Specification of drilling machine - Drilling - Reaming - Boring - Counter boring - Counter - sinking - Tapping - Spot facing - Trepanning. Shaping Machine - Classification of shapers - Shaper - working principle - Shaping Machine - Working - Main Parts of a Shaping Machine - Specifications of Shaping Machine. Operations on Shaping Machine - Machining Horizontal Surfaces - Machining Vertical Surfaces - Machining Angular Surfaces - Cutting Rack or Splines - Cutting Key Ways - Machining Irregular Surfaces - Clamping The Work on a Shaper - Cutting speed, Feed and Depth of cut - Machining time. Planer machine - Working principle - Classification of planers - Double housing planer - Open side planer - Other type of planer - Planer machine – construction details - Specifications of planer. Operations on planer machine - Planing horizontal surfaces - Planing vertical surfaces - Planing angular surfaces - Planing formed surfaces - Planing slots and grooves - Shaper and planer tools - Cutting speed, feed and depth of cut - Machining time. Slotting Machine - Slotter Operations - Working Principle - Classification of slotters - Specifications of slotter machine - Cutting speed, Feed and Depth of cut. Introduction to Milling - Working principle - Difference between shaping, turning and milling - Types of milling machine - Column and knee type milling machines - Column and knee type milling machines - Vertical milling machine - Universal milling machine - Specification. Milling operations - Plain milling - Face milling - Straddle milling - Gang milling - Form milling - Profile milling - End milling - Angular and T-slot milling - Gear milling - Cam milling - Saw milling. Introduction to Grinding - Types of grinding - Surface grinding methods. Metal cutting saws - Hacksaw - Hacksaw blades - Specification of blades - Setting of blades - Metal cutting saws - Power hacksaw - Precautions while machine sawing. NC system - Evolution of CNC machines - Need of NC machines - Features of NC system - Program of instructions (Punched tape) - Machine control unit (MCU) - Machine tool - Feedback device - Advantages of NC systems - Limitations of NC systems - Suitability of NC systems. CNC - Limitations of NC machine - Development of CNC machines - Computer numerical control machines - Functions of CNC - Advantages of CNC Machines over NC Machines - Disadvantages of CNC machines - Direct Numerical Control (DNC) - Functions of DNC system - Advantages of DNC machine - Comparison of NC, CNC and DNC system.