Design of Jigs, Fixtures and Press Tools

Foreword
Preface
Contents
About the Author
Part I Jigs and Fixtures
1 Introduction to Jigs and Fixtures
	1.1 Introduction to Modern Day Production
	1.2 Definition of Jigs, Fixtures and Tooling
	1.3 Fundamental Concepts in the Design of Jigs and Fixtures
2 Design of Locators
	2.1 General Principles of Degrees of Freedom and Constraints
	2.2 Foolproofing
	2.3 Other Principles in the Design of Locators
	2.4 Various Types of Locators
3 Design of Clamps
	3.1 Principles of Clamping
	3.2 Classification of Clamps
4 Drilling Jigs
	4.1 Introduction
	4.2 Types of Jigs
	4.3 Components of Jig
		4.3.1 Drill Bushes
		4.3.2 Fasteners
		4.3.3 Jig Body and Base Frame
		4.3.4 Indexing Mechanisms
5 Design of Milling Fixtures
	5.1 Salient Features of Milling Fixtures
	5.2 Classification of Milling Fixtures
		5.2.1 Plain Milling Fixture
		5.2.2 Straddle Milling Fixture
		5.2.3 Gang Milling Fixture
		5.2.4 String Milling Fixture
		5.2.5 Indexing Milling Fixture
		5.2.6 Hydraulic Fixtures
	Annexure To Milling Fixtures
	Explanatory Note On Machine Vise
6 Other Types of Fixtures
	6.1 Turning, Grinding, Broaching, Welding and Modular Fixtures
	6.2 Turning Fixtures
		6.2.1 Chuck Jaws, Collets, Special Jaws and Expanding Pegs
		6.2.2 Special Features of Turning Fixtures
	6.3 Grinding Fixtures
	6.4 Broaching Fixtures
	6.5 Welding Fixtures
	6.6 Modular Fixtures
	6.7 Advantages and Disadvantages of Modular Fixtures
		6.7.1 Advantages
		6.7.2 Disadvantages
	Annexure 1: To Other Types of Fixtures Explanatory Note on Steady Rest Used in Centre Lathe
	Annexure 2: Other Types of Fixtures
Part II Press Tools
7 Introduction to Presses and Auxiliary Equipment
	7.1 Classification of Presses
	7.2 Classification Based on Power Source
	7.3 Classification Based on Type of Press Frame
	7.4 Classification Based on Method of Actuation of Slide
	7.5 Classification Based on the Number of Slides in Action
8 Sheet Metal Forming Processes
	8.1 Classification
	8.2 Calculation of Force Requirements in Blanking and Piercing
	8.3 Die Clearances in Blanking and Piercing
	8.4 Process of Bending Through ‘V’ Die and ‘Wiping’ Die
	8.5 Forming Dies
	8.6 Drawing Dies
	8.7 Drawing of Box-Like Shells
	8.8 Direct and Reverse Redrawing
9 Introduction to Press Tools
	9.1 Standard Die Set
	9.2 Description of Press Tools
		9.2.1 The Blanking/Piercing/Bending/Drawing Punch
		9.2.2 Blanking/Piercing/Bending/Drawing Die
		9.2.3 Stripper Plates
		9.2.4 Stock Guides
		9.2.5 Shedder
		9.2.6 Stops
		9.2.7 Pilots
10 Introduction to the Design of Blanking, Piercing, Progressive and Compound Dies
	10.1 Design of Blanking, Piercing, Progressive and Compound Dies
	10.2 Guidelines for the Design of Press Tools
		10.2.1 Scrap-Strip Layout
		10.2.2 Design of Die Blank
		10.2.3 Punch Design
		10.2.4 Stripper Design
	10.3 Design of Progressive Dies
		10.3.1 Scrap-Strip Layout
		10.3.2 Press Tonnage
		10.3.3 Design of Die Plate
		10.3.4 Design of Punch
		10.3.5 Design of Strippers
		10.3.6 Design of Pilots
		10.3.7 Design of Stoppers
		10.3.8 Shut Height of Die Set
	10.4 Compound Die
	10.5 Calculation of Centre of Pressure in Unsymmetrically Profiled Components
	Annexure to Design of Progressive Dies
	Progressive Die Design
11 Bending, Drawing and Forming Dies
	11.1 Introduction
	11.2 Classification of Bending and Other Forming Dies
		11.2.1 Bending Dies
		11.2.2 Drawing Dies
		11.2.3 Other Forming Dies
	Annexure to Bending, Drawing and Forming Dies
	Computer Model—Process of Making a Tiffin Box
Worked Examples for Jigs and Fixtures
WE.1 Inclined Drilling Jig with Indexing (Chap. 4)
WE.2 Box Jig (Chap. 4)
WE.3 Indexing Milling Fixture (Chap. 5)
WE.4 String Milling Fixture (Chap. 5)
WE.5 External Broaching Fixture (Chap. 6)
WE.6 Boring Fixture (Chap. 6)
Appendix A Metal Cutting Tools
Introduction
Single-Point Cutting Tools Used in Turning and Boring Fixtures
Multi-point Cutting Tools
Drilling Tools
Reamers
Taps
Milling Cutters
Broaching Tools
Appendix B Fits and Tolerances
Introduction
Unilateral and Bilateral Tolerances
Shaft and Hole Basis of Specifying Tolerances
Appendix C Jigs and Fixtures: Suggested Questions and Answers
Design Exercises for Press Tools
Appendix D Properties of Materials
Appendix E Drawing Speeds and Lubricants
Appendix F Press Tools—Suggested
References
Index
Index