Machining Science and Metrology 2022 Scheme VTU Notes VTU University 4th SEM Mechanical Engineering | BME402 notes

Scheme & Syllabus Copy of Machining Science and Metrology 2022 Scheme VTU Notes

Machining Science and Metrology BME402 2022 Scheme VTU Notes Syllabus copy 

Machining Science and Metrology BME402 2022 Scheme VTU Notes 

Module 1: Introduction to Metal Cutting

• Orthogonal and Oblique Cutting:

  • Classification of cutting tools: Single and multipoint.
  • Tool signature for single-point cutting tools.
  • Mechanics of Orthogonal Cutting: Chip formation, shear angle, and its significance.
  • Merchant Circle Diagram and numerical problems.
  • Cutting tool materials and applications.

• Introduction to Basic Metal Cutting Machine Tools:

  • Lathe: Parts, accessories, and various operations.
  • Kinematics of lathe.
  • Turret and Capstan lathe.

Module 2: Milling Machines

• Milling Machines:

  • Up milling & down milling, classification, and constructional features (Column and Knee, Vertical Milling Machine).
  • Milling Cutter Nomenclature and various operations.
  • Calculation of machining time.

• Indexing:

  • Need for indexing: Simple, compound, and differential indexing calculations.
  • Simple numerical problems on indexing.

• Shaping, Slotting, and Planning Machine Tools:

  • Driving mechanisms of Shaper, Slotter, and Planer.
  • Operations done on Shaper, Planer, and Slotter.
  • Difference between shaping and planning operations.

• Drilling Machines:

  • Constructional features (Radial and Bench Drilling Machines).
  • Operations, types of drills, and drill bit nomenclature.
  • Calculation of machining time.

• Grinding:

  • Grinding operations, classification of processes: Cylindrical, Surface, and Centerless grinding.

Module 3: Thermal Aspects, Tool Wear, and Machinability

• Temperature in Metal Cutting:

  • Heat generation and temperature distribution.
  • Effect of cutting speed on temperatures.
  • Measurement of cutting temperatures.

• Tool Life and Tool Wear:

  • Progressive tool wear: Forms of wear in metal cutting (crater wear, flank wear).
  • Tool-life criteria.

• Cutting Tool Materials:

  • Basic requirements of tool materials.
  • Major classes of tool materials: High-speed steel, cemented carbide, ceramics, CBN, diamond, and tool coatings.

• Machinability:

  • The work material and its machinability.
  • Cutting Fluids: Action of coolants and applications.

Module 4: Introduction to Metrology and Measurements

• Metrology & Measurements:

  • Definition, objectives, and classification of metrology.
  • Standards of length: Wavelength standard, subdivision of standards.
  • Numerical problems on length calibration.

• Line and End Standards:

  • Slip gauges, wringing phenomena.
  • Numerical problems on slip gauges.

• Systems of Limits, Fits, and Tolerances:

  • Definition of tolerance, tolerance specification in assembly.
  • Principle of interchangeability and selective assembly.
  • Limits of size, Indian standards.
  • Concepts of limits of size and tolerances, cost vs. tolerances, compound tolerances, accumulation of tolerances.
  • Definition and types of fits, their designation.

Module 5: Gauges and Comparators

• Gauges:

  • Classification of gauges, Taylor’s principle.
  • Design of GO and NO-GO gauges, wear allowance.
  • Types of gauges: Plain plug gauges, ring gauges, snap gauge, limit gauge.
  • Simple problems on gauges.

• Comparators:

  • Introduction and classification.
  • Characteristics and systems of displacement amplification in mechanical comparators: Reed type, Sigma comparator, Zeiss ultra-optimeter, Solex air gauge, ultrasonic gauges, LVDT.

• Angular Measurements:

  • Bevel protractor, sine bar, angular gauges.
  • Numerical problems on building angles.