http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Advancements in the fields of mechanization and automation have led to large strides forward for the entire manufacturing industry. Various products, ranging in size from cars to small circuit components, are made through automated procedures in manufacturing facilities. These processes help improve efficiency, save on labor costs, and reduce the occurrences of defective products, improving company growth and product quality. A common feature of automated processes is the need for the item being worked on to be held firmly in place while work is being done on it--"workholding." Workholders help improve the economy of production by creating smooth operational processes and helping to facilitate quick transitions from one work station to another. This simplifies and streamlines the entire mounting parts operation. Manufacturing workholders use many different methods to hold the parts securely, including hydraulic, electric, pneumatic, and mechanical holders, depending on the application. Workholding devices are regularly referred to as "jigs" and "fixtures," and are often used interchangeably. A fixture secures the workpiece and allows the tool (but does not guide it) to move relative to the workpiece, while a jig holds and locates the workpiece and actually guides the tool. Workholder Devices presents the fundamentals of workholders design for machining and welding operations with their relevant applications, so readers can clearly assess the capabilities, limitations, potentials, and competitive aspects of each of these devices. The author shows how dynamic workholders are subject to constant change, improvement, and innovation. Unique Features Contains more than 180 illustrations, numerous calculations, tables, and essential appendices. Special attention is paid to modular systems, clamping devices, and clamping force calculation. Perfect for students of manufacturing engineering, process engineers, design engineers and drafters, as well as quality control and maintenance and reliability managers and technicians.
Cover (Workholder Devices: Design and Calculations) -- Front Matter -- Title Page -- Copyright -- Dedication -- Contents -- Preface -- Acknowledgments -- About The Author -- Chapter 1 -- Introduction to Workholders -- Definition of Terms -- Workholders -- Jigs -- Fixtures -- Tool or Tooling -- Classification of Workholders -- General-Purpose Workholders -- Special Workholders -- Permanent Workholders -- Temporary Workholders -- Workholders -- Modular Workholders -- The Economic Approach to the Provision of Workholders -- How to Make Workholders More Productive -- Operation Considerations
Planning the Workholders -- Selecting Workholders for Simple Machines -- Selecting Workholders for Complex Machines -- The Future of Workholding -- Review Questions -- Chapter 2 -- Design of Workholders -- Workholder Design Fundamentals -- Design Process -- Defining Requirements -- Gathering and Analyzing Information -- Workpiece Consideration -- Manufacturing Operation Consideration -- Equipment Consideration -- Personal Consideration -- Basic Principles of Design Workholders -- Developing Several Options -- Choosing the Best Option -- Implementing the Design -- Creating Final Drawings
Creating a Bill of Materials -- Verification of Workholder Design -- Workholder Materials -- Properties of Workholder Materials -- Hardness -- Toughness -- Wear Resistance -- Machinability -- Brittleness -- Tensile Strength -- Shear Strength -- Ferrous Workholder Materials -- Nonferrous Workholder Materials -- Main alloying element (first digit) -- Special alloying conditions (second digit) -- Serialization and individual alloy identification (third and fourth digits) -- Nonmetallic Workholder Materials -- Review Questions -- Chapter 3 -- Supporting and Locating Principles
Locating-Principles and Methods -- Basic Locating Principles -- Positioning the Locators -- Accuracy and Tolerances -- Duplicate Locators -- Foolproofing -- Motion Economy -- Scheme for Determining the Location of the Workpiece in the Workholders -- Determining the Location of the Workpiece by Three Flat Surfaces -- Determining the Location of the Workpiece by Two Flat Surfaces and One Hole -- Determining the Location of the Workpiece by Two Flat Surfaces and One Cylindrical Surface -- Determining the Location of the Workpiece by a Flat Surface and Two Holes
Complete and Partial Determination of the Workpiece Location -- Locating Elements -- Elements for Locating from Machined Surfaces -- Locating Buttons -- Locating Pins -- Locating Pads -- Elements for Locating from Unmachined Surfaces -- Adjustable Locators -- Spring-Type Jack Pin Locators -- Elements for Locating from Outside Surfaces -- Locating Prisms -- V-locators -- Nesting (Cavity) Locators -- Bushing Locators -- Elements for Locating from Internal Surfaces -- Locating Pins and Locating Plugs -- Conical Locators -- Diamond Locating Pins -- Mandrel Locators -- Review Questions -- Chapter 4
Clamping Devices and Clamping Forces Calculation
CT : Industrial Press, Incorporated,c2024