qb_me5635-design of jigs, fixtures and press tools-jan-may.2014

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Question Bank – April/May 2014 ME5635-Design of Jigs, Fixtures And Press Tools Saveetha School of Engineering Saveetha University Chennai – 602 105 Department of Mechanical Engineering Academic Year 2012- 2013 / Even Semester QUESTION BANK Sub. Code/Name: ME5635-Design of Jigs, Fixtures and Press Tools Year/Sem: III/VI (Use of approved design data book is permitted) UNIT I – PURPOSE, TYPES AND FUNCTIONS OF JIGS AND FIXTURES Tool design objectives – Production devices – Inspection devices – Materials used in Jigs and Fixtures – Types of Jigs – Types of Fixtures–Mechanical actuation – Pneumatic and Hydraulic Actuation – Analysis of clamping force – Tolerance and Error analysis. Part A (2 Marks) 1. Define the term tool design. Ans: Tool design is the process of designing and developing the tools, methods and techniques necessary to improve manufacturing efficiency and productivity. 2. What are the types of tooling? Ans: (i) Cutting tools (single and multiple point cutting tools), (ii) press tools, (iii) dies, (iv) jigs and fixtures, and (v) gauges. 3. Define the term jig. Ans: Jig is a work holding device that holds, supports and locates the workpiece and guides cutting tool for a specific operation. 4. Define the term fixture. Ans: Fixture is a work holding device that holds, supports and locates the workpiece for a specific operation but does not guide the cutting tool. 5. Name any two materials commonly used in jigs and fixtures. Ans: 1. HSS (High Speed Steel), 2. High Tensile Steel, 3. Oil Hardening Non-shrinking tool steel, and Dept. of Mech. Engg. Page 1 of 27 SSE, Saveetha University 4. Case Hardening Steel

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