JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-requisites

Machine Design, Machine Tools and Metrology, Machining Science

Course Objectives

This course is designed to:

• Implement the tool design process when designing tooling for the manufacturing of a product.
• Apply Geometric Tolerancing principles in the designs of tooling.
• Evaluate and select appropriate materials for tooling applications.
• Design, develop and evaluate cutting tools and work holders for a manufactured product.
• Design, develop and evaluate appropriate Gauging systems to define limits and specifications of a work piece during the manufacturing process.
• Design, develop, and evaluate tooling for various joining processes.
• Apply ANSI standards to tool design drawings and layouts.
• Use CAD and conventional techniques in creating tooling drawings.

Course Outcomes

At the end of the course, the student will be able to, understand basic motions

involved in a machine tool, design machine tool structures, design and analyze systems for specified speeds and feeds, select subsystems for achieving high accuracy in machining, understand control strategies for machine tool operations and apply appropriate quality tests for quality assurance.

UNIT - I

Introduction to Machine Tool Drives and Mechanisms: Introduction to the course, Working and Auxiliary Motions in Machine Tools, Kinematics of Machine Tools, Motion Transmission.

UNIT - II

Regulation of Speeds and Feeds: Aim of Speed and Feed Regulation, Stepped Regulation of Speeds, Multiple Speed Motors, Ray Diagrams and Design Considerations, Design of Speed Gear Boxes, Feed Drives, Feed Box Design.

UNIT - III

Design of Machine Tool Structures: Functions of Machine Tool Structures and their Requirements, Design for Strength, Design for Rigidity, Materials for Machine Tool Structures, Machine Tool Constructional Features, Beds and Housings, Columns and Tables, Saddles and Carriages.

UNIT - IV

Design of Guideways, Power Screws and Spindles: Functions and Types of Guideways, Design of Guideways, Design of Aerostatic Slideways, Design of Anti-Friction Guideways, Combination Guideways, Design of Power Screws. Design of Spindles and Spindle Supports: Functions of Spindles and Requirements, Effect of Machine Tool Compliance on Machining Accuracy, Design of Spindles, Antifriction Bearings.

UNIT - V

Dynamics of Machine Tools: Machine Tool Elastic System, Static and Dynamic Stiffness Acceptance Tests

TEXT BOOKS:

• 1. Tool Design/ Donaldson/ Fifth Edition, McGraw Hill
• 2. Principles of Machine Tools/ G.C. Sen and A. Bhattacharyya /New Central Book Agency R18 B.TECH MECHANICAL ENGG. III YEAR

REFERENCE BOOKS:

• 1. Design of Machine Tools / D. K Pal, S. K. Basu / Oxford
• 2. Machine Tool Design and Numerical Control/ N.K. Mehta / Mc Graw Hill
• 3. Metal Cutting and Tool Design/ Ranganath B.J./ Vikas Publishers
• 4. Fundamentals of Tool Design/ ASTME, PHI
• 5. Tooling Data/ Joshi P.H./ Wheeler Publishing R18 B.TECH MECHANICAL ENGG. III YEAR