JIGS AND FIXTURES:-Introduction, definition and difference; usefulness of jigs and
fixtures; design considerations; materials used; principles and methods of location; clamping
elements; jig bushes; drilling jigs; fixtures for milling turning, boring and welding; assembly
fixtures; indexing devices; economics of jigs and fixtures; complete design of a jig and a
fixtures; complete design of a jig and a fixtures.
Units: II
NEW MACHINING METHODS: Types of machining methods; hot machining;
electric discharge machining (E.D.M.) ultrasonic machining (U.S.M.) ; Electron beam
machining (E.B.M.) laser beam Machining (L.B.M.); abrasive jet machining (A.J.M.) ;
plasma arc machining (PAM); economics of machining! ,
Units: III
Precision Measurement : Standards of linear measurements; linear and angular
measurements; screw thread measurement; measurement of effective diameter, pitch and
thread angles; Gear measurement, measurement of tooth profile, tooth thickness and pitch,
Measurement of surface roughness. Quantitative methods of roughness measurements,
Stylus and profilograph methods.
Precision Measuring Instruments: Comparators types; working principles applications
and limitations of various comparators; optical flat; autocollimator indicators, slip
gauges, bevel protector.
Units: IV
DESIGN OF SINGLE POINT CUTTING TOOLS: Introduction; functions of various tool
angles; design of single point turning too]; parting tool; empirical determination of force
components; optimum value of tool angles. DESIGN OF Multipoint Cutting tool:
Introduction; angle of contact; force analysis; approach through dimensional analysis; force
and power consumption; tooth forn1 and cutter design.
Units: V
Design of Machine Tool Element
Design of Lathe bed, Material and construction feature, various bed section, designing for
torsional rigidity, use of reinforcing stiffener in lathe bed. Theoretical aspect of design of
guide ways, Material and construction features, Antifriction guide ways.