Course

Unit 1

Design of Jigs: Introduction – Location Principles – Six Point Location Principle – Locators – Clamping Principles – Clamping Devices – Drill Jigs – Drill Bushes – Drill Jig Types – Design and Development of Jigs for given components.

Unit 2

Design of Fixtures: Milling Fixtures – Milling Methods – Milling Fixture Types – Turning fixtures – Broaching Fixtures – Grinding Fixtures – Assembly, Inspection and Welding Fixtures – Modular Fixtures – Design and Development of Fixtures for given components.

Unit 3

Design of Dies: Power presses types and construction details, die cutting operation, cutting action in die and punch, center of pressure, clearance and its significance, cutting forces, methods of reducing cutting forces, methods of punch support, strippers, stock stops, guide pilots, knockout, design of blanking and piercing dies. Design Concepts and description of the components of progressive dies. Design of progressive dies. Design of compound dies. Design of combination dies.

Unit 4

Drawing Dies: Metal flow and factors affecting drawing, blank size calculations, drawing force, single and double acting drawing dies, design and development of drawing dies for different components.

Unit 5

Bending and Forming Dies: Spring back, bend allowance; calculation of development length, bending force calculations types of bending dies. Curling dies. Forging process and forging dies. (Introductory Treatment)

Course Objectives

• Familiarize with location and clamping principles for design of a jig or a fixture
• Elucidate design of jigs and fixtures for any given component
• Elucidate design of a die-set for a given sheet metal component

Course Outcomes

• CO1: Select standard components, clamping and locating devices using basic principles of jigs and fixtures
• CO2: Formulate the design procedure and select the materials used for manufacture
• CO3: Design jigs and fixtures for a given component
• CO4: Identify and choose the types of presses for a given sheet metal component
• CO5: Design a die-set for a given sheet metal component using the design procedure for various sheet metal working processes.

CO – PO Mapping

Textbook(s)

• P. H. Joshi – ‘Jigs and Fixtures Design Manual’ – McGraw Hill – 2002
• Kempster M. H. A. – ‘An Introduction to Jig and Tool Design’ – Viva Books Pvt. Ltd. – 2002
• P. H. Joshi – ‘Press Tools Design and Construction’ – S. Chand and Company Ltd. – Revised edition, 2008

Reference(s)

• John G. Nee – ‘Fundamentals of Tool Design’ – Society of Manufacturing – 1998 – 4^th Edition
• E. K. Henriksen – ‘Jig and Fixture Design Manual’ – Industrial Press, New York – 1973
• Paquin and Crowley – ‘Die Design Fundamentals’ – Industrial Press, New York – 1979
• Donaldson, Lecain and Goold – ‘Tool Design’ – McGraw Hill, New York – 1976

Evaluation Pattern