JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

Nil

Course Objectives:

• Understand the BIS code fits and tolerances for geometrical dimensioning and tolerance (GD & T).
• Understand the principal application of different measuring instruments.
• Summarize the application of latest manufacturing techniques (nano).

Course Outcomes:

• Tolerance and accuracy
• Nano measurements techniques

UNIT - I

Accuracy and Alignment Tests: Accuracy and alignment tests: General concept of accuracy, spindle rotation accuracy, test methods, displacement accuracy, dimensional wear of cutting tools, accuracy of NC systems, clamping errors, setting errors, location of rectangular prism, cylinder, basic type of tests, measuring instruments used for testing machine tools, alignment tests, straightness, flatness, parallelism, squareness, circularity, cylindricity.

UNIT - II

Influence of Static Stiffness, Thermal Effects: Influence of static stiffness, thermal effects: Static stiffness, nature of deformation in a machine tool, overall stiffness of a lathe, compliance of work piece, errors due to the variation of the cutting force and total compliance, accuracies due to thermal effects, methods of decreasing thermal effects-Influence of vibration on accuracy.

UNIT - III

Precision Machining: Top down and bottom up approach, development of nanotechnology, precision and micromachining, diamond turning of parts to nanometer accuracy. Stereo microlithography, machining of micro-sized components, mirror grinding of ceramics, ultra-precision block gauges.

UNIT - IV

Nano Measuring Systems: In-process measurement of position of processing point, post process and online measurement of dimensional features, mechanical measuring systems, optical measuring systems, electron beam measuring systems, pattern recognition and inspection systems.

UNIT - V

Lithography: Nano Lithography, photolithography, nano lithography, photolithography, electron beam lithography, ion beam lithography, optical lithography, LIGA process, dip pen lithography, deep UV.

TEXT BOOKS:

• 1. Murthy R. L, ―Precision Engineering in Manufacturingǁ, New Age International, New Delhi, 2005.
• 2. Norio Taniguchi, ―Nanotechnologyǁ, Oxford university press, Cambridge, 1996.

REFERENCE BOOKS:

• 1. Lee Tong Hong, ―Precision Motion control, Design and Implementationǁ, Springer Verlag, UK, 2001.
• 2. Liangchi Zhang, ―Precision Machining of Advanced Materialsǁ, Trans Tech Publications Ltd., Switzerland, 2001.
• 3. Hiromu Nakazawa, ―Principles of precision engineeringǁ, Oxford university press, 1994.