CMF331 Design of JIGS and Fixtures Syllabus:
CMF331 Design of JIGS and Fixtures Syllabus – Anna University Regulation 2021
COURSE OBJECTIVES:
At the end of this course the student should be able to understand
• Understand the applications of specific jigs and fixtures
• Identify the types of locators and clamps used in jigs and fixtures.
• Apply the basic principles of work holding and clamping systems.
• Evaluate human factors involved in design of jigs and fixtures
• Understand the material and manufacturing process for jigs and fixtures
UNIT I BASICS OF JIGS AND FIXTURES
Introduction – Jigs and Fixtures – Difference between Jigs and Fixtures – Advantages of jigs and Fixtures –Economy and cost – Elements of Jigs and Fixtures – Fool Proofing – Materials used in Jigs and Fixtures – Degrees of Freedom – 12 degrees of freedom – 6point location principle – (or) 3-2-1 principle of location – Essential features of Jigs and Fixtures – General Design Principles – Design steps – Common defects in Jigs design.
UNIT II PRINCIPLES OF LOCATION
Principles of location – location point – types of locators – pins and studs – V block – cup and cone location points – adjustable locating points – special adjustable stops – location from finished holes in the work – Diamond pin locator – Cam operated ‘V’ locator – Quick action ‘V ’ locator – Six point location of a three legged object – Location of a cylinder on a v-block- Design of location systems for industrial applications
UNIT III PRINCIPLES OF CLAMPING
Principles of clamping – types of clamping – lever clamp – hinged clamp – two way clamp – swinging clamp – wedge clamp – eccentric clamping arrangement – quick action clamp – Cam operated clamp – quarter turn screw – Toggle clamp – Pneumatic and hydraulic clamps – Washers – ‘C’ washer – spherical and flat washers – Design of clamping system for industrial applications.
UNIT IV JIGS AND BUSHINGS AND DRILL JIGS
Jig Bushing: Materials for jig bushing – press fit bushing – Fixed renewable bushing – slip renewable bushing – liner bushing – screw bushing – miscellaneous type of drill bushings – bushing specifications.
Drill Jigs: Open drill jig plate drill jig – plate drill jig – template drill jig – channel drill jig – turn over drill jig – angle plate drill jig – closed box drill jig – leaf drill jig – post jig – indexing drill jig – universal drill jig – design of template and leaf jig Design of Jigs for industrial applications.
UNIT V PRINCIPLE OF FIXTURE DESIGN
Introduction – principles of fixture design – element of fixtures – design consideration of locators and clamps for fixtures – types of fixtures – design of turning fixtures – mandrels – type of mandrels – boring fixtures – milling fixtures – essentials of milling fixtures – method of locating milling fixtures with respect to cutter position – grinding fixtures – surface grinding and cylindrical grinding fixtures – broaching fixtures – internal and external broaching fixtures– welding fixtures- Design of fixtures system for industrial applications.
TOTAL : 45 PERIODS
COURSE OUTCOMES:
Upon the completion of this course the students will be able to
• Categorize and justify the requirements of Jigs and Fixtures for Manufacturing, Testing and Assembly
• Describe and implement various indexing mechanics in manufacturing.
• Analyze problems related to Jigs and fixtures in Manufacturing, Testing and Assembly.
• Select suitable material and manufacturing process
• Design and drafting various Jigs and Fixtures using appropriate software package.
TEXT BOOKS:
1. Joshi, P.H. “Jigs and Fixtures”, Second Edition, Tata McGraw Hill Publishing Co., Ltd., New Delhi, 2010.
2. Edward G. Hoffman, “Jig and Fixture Design”, Delmar, Cengage Learning, Fifth Ed., 2004 ISBN-13: 9781401811075.
REFERENCES:
1. Venkataraman. K., “Design of Jigs Fixtures & Press Tools”, Tata McGraw Hill, New Delhi, 2005.
2. ASTME Fundamentals of Tool Design Prentice Hall of India.
3. Design Data Hand Book, PSG College of Technology, Coimbatore.
4. Donaldson, Lecain and Goold “Tool Design”, 5th Edition, Tata McGraw Hill, 2017.
5. Hoffman “Jigs and Fixture Design”, Thomson Delmar Learning, Singapore, 2004.
6. Kempster, “Jigs and Fixture Design”, Third Edition, Hoddes and Stoughton, 1974.
7. William E Boyes, “Jigs. & Fixtures & Gauge”, Michigan SME 1stEd., 1986, ISBN: 0872633659
8. Kempster M. H. A, “An Introduction to Jig and Tool Design”, Butterworth-Heinemann Ltd. 3rdEd.1974, ISBN-13: 9780340182215.