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Jig and Fixture Design Manual
Jig and Fixture Design Manual
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The book is written as a textbook and reference source, and is meant to be used by the experienced practitioner as well as the beginner, whether he is a technician in industry or a college student.
The author concentrates on three major objectives: (1) to describe the fixture components in full; (2) to present the fundamental principles for efficiently combining the components into successful fixtures; and (3) to apply basic engineering principles to the mechanical and economic analysis of the complete design. These three tasks are supported by a comprehensive description of com mercjally available fixture components, a four-point, step-by-step method and comprehensive check list for the design procedure, applicable equally to all types of fixtures, and also calculation methods for the stress and deformation analysis of the fixture body and its major components. The use of a variety of calculation methods is demonstrated by numerical examples.
The author has avoided presenting a confusion of detailed drawings of complicated fixtures. Instead, there are 15 actual cases included, ranging from the simplest drill plate to some complex and quite advanced fixtures for milling and other operations. For each category of machining operations, there is a definition of its characteristic fixture requirements and one or more typical examples. In addition, the book includes the design principles for fixtures of the most important non-machining operations, such as welding and assembly.
A number of the line drawings in the book are executed in a recently introduced drawing style in which two line thicknesses are used for edges and contours. The heavier lines indicate the contours of surfaces that are surrounded by air. With the dominant position of the metric system outside of the United States and the approaching introduction of this system within this country, metric units are used together with the English units throughout the book.
Four informative appendices with illustrations should prove to be helpful to the reader, they are "Measuring Angles in Radians," "Transfer of Tolerances from the Conventional Dimensioning System to the Coordinate System," "Dimensioning of Fixtures," and lastly, "Metric Conversion Tables of Linear Measure."
The Use of Metric Units
2 Preliminary Analysis and Fixture Planning
3 The Fixture Design Procedure
4 Locating Principles
5 Preparation for Locating
6 Design of Locating Components
7 Loading and Unloading
8 Chip Problems
10 Clamping Elements
12 Supporting Elements
13 Cutter Guides
14 Drill Bushings
15 Design of Fixture Bodies
16 Drawings, Dimensions, and Tolerances
17 Standard and Commercial Fixture Components
18 Design Studies I - Drill Jigs
19 Design Studies II - Milling Fixtures
20 Design Studies III - Miscellaneous Lathe Fixtures
21 Universal and Automatic Fixtures
Appendix 1 Measuring Angles in Radians
Appendix II Transfer of Tolerance from the Conventional Dimensioning
System to the Coordinate System
Appendix III The Dimensioning of Fixtures by Stress Analysis
Appendix IV Metric Conversion Tables for Linear Measure