CM4007 Precision Engineering Syllabus:
CM4007 Precision Engineering Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
• To gain knowledge of the need for precision engineering and its application.
• To familiarize the importance of materials in precision engineering.
• To Introduce latest topics in manufacturing like micro machining and MEMS in order to equip them to join core facturing industries.
• To Impart knowledge about the causes of errors and their remedies.
• To introduce the students with elements used in precision machines.
UNIT I INTRODUCTION
Accuracy and Precision– Need for high precision –concept of accuracy – tolerance and fits system – Hole and shaft system – accuracy of manufacturing processes – types of fits – Selective assembly.
UNIT II MATERIALS FOR PRECISION ENGINEERING
Diamond – types-single crystal – PCD – Natural-synthetic CBN – Ceramics – coated metals and nonmetals – High performance polymer – alloys – refractory metals: cutting tools – performance – components of instruments – Jewels – self Lubrication – smart materials – properties – testing –
applications.
UNIT III PRECISION MACHINING
Precision grinding: IC chip manufacturing- ELID process – aspherical surface generation Grinding wheel- Designer and selection of grinding wheel -High-speed grinding -High-speed milling -Micro machining – Diamond turning-MEMS – micro finishing process – surface roughness measures – concept and non-concept method – comparison of features with machining process.
UNIT IV ERRORS: CAUSES AND REMEDIES
Static stiffness – influence on machining accuracy – over all stiffness in a machine/instrument – errors due to variation of cutting forces – clamping forces – errors due to compliance while machining. Inaccuracy due to thermal effects: Heat sources and dissipation – Geometry of thermal deformation – Influence of forced is statics dimensional wear of elements – instruments; Machining tools and their influence on accuracy- error due to clamping and setting location.
UNIT V PRECISION MACHINE ELEMENTS
Introduction- guide ways- Drive systems; rolling element bearings – Principles, construction, classification, application etc., – Lubricated sliding bearings – construction – Principles etc., – Hydrostatics bearings-types – aerostatic bearings – linear drive motors – magnetic bearings – applications – limitations – advantages.
COURSE OUTCOMES:
At the end of this course, the students shall be able to:
CO1: Understand the need of precision engineering and its application.
CO2: Discuss process knowledge to use the light material / superior material as per the raising demands.
CO3: Discuss the advanced precision machining processes.
CO4: Explain the various errors, its causes and remedies to overcome these.
CO5: Describe elements used in precision machine tool.
REFERENCES:
1. James D. and Meadow, S., “Geometric Dimensioning and Tolerancing”, Marcel Dekker Inc.,1995.
2. Juliar W.Gardner, and Vijay K. Varadan, “Micro Sensors, MEMS and Smart Devices”, John Wiley and Sons, 2001.
3. Murthy R.L., “Precision Engineering in Manufacturing”, New age International Publications, New Delhi, First edition 1996; Reprint 2005.
4. Paulo Davim “Microfabrication and Precision Engineering: Research and Development”, Woodhead publishing, 2017.
5. Venkatesh V.C. and Sudin I., “Precision engineering”, Tata McGraw Hill Co., New Delhi, 2007.