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Fixtures--the component or assembly that holds a part undergoing machining--must be designed to fit the shape of that part and the type of machining being done. This book discusses the fundamentals of Computer-Aided Fixture Design (CAFD) techniques and covers fixture planning, fixture design (both modular and dedicated fixtures), fixture design verifications, and the overall integration with CAD/CAM. The book shows how CAFD may lead to a significant reduction of product and process development time and production cost, and how CAFD can increase quality assurance through simulation and science-based technical specification and cost estimation in business quoting, especially in current supplier-based manufacturing. It also provides case study examples. * This book provides a total solution of CAFD, including planning, design, and design verification* Practical and comprehensive theoretical analysis of fixturing from real industrial application projects* Introduces the integration of fixture design and analysis with CAD/CAM so that detailed geometric information can be processed and complex fixture designs can be designed and analyzed Preface......Page 6 Table of Contents......Page 9 Introduction......Page 11 References......Page 16 Setup Planning......Page 18 Current State of the Art......Page 27 Closure......Page 30 Reference......Page 31 Manufacturing Errors and Tolerance Stack-up......Page 33 Setup Planning and Tolerance Control......Page 36 Tolerance Normalization......Page 41 2.2.3.2 Location Tolerances......Page 49 2.2.3.3 Runout Tolerances......Page 50 2.2.3.4 Relative Dimensional Tolerances and the Multiple To......Page 52 SYSTEM DEVELOPMENT......Page 56 2.3.1.2 Tolerance Information Model......Page 61 Figure 2.30. Main operations in the object-oriented extend......Page 63 Generative Setup Planning Algorithm......Page 64 2.3.2.3 Setup Planning Algorithms......Page 70 Group 1......Page 72 Group 1......Page 74 ADVANCED TOPICS......Page 78 2.4.1.2 Evaluation of Geometric Tolerance Stack-up......Page 82 2.4.1.3 Multi Attribute Utility Analysis......Page 87 References......Page 98 3.1.1.1 A Historical Review......Page 104 3.1.1.2 Fixture Design......Page 106 3.4.3.1 Family Part Modeling......Page 147 3.4.3.3 Fixture Modeling......Page 149 3.4.4.1 Fixture Plan Matching Algorithm......Page 153 Summary......Page 190 3.6.1.1 Problem Description......Page 191 3.6.1.2 Fixture Location Verification......Page 193 FRAMEWORK AND MODELING......Page 223 Constrained DOF of Workpiece. In Asada’s work (1985), it is......Page 230 Locating Performance Index. The LPI measures a fixture abili......Page 231 Initial Position Generation. Theoretically, initial locating......Page 232 Position Optimization. Locating positions are optimized by s......Page 233 FIXTURING TOLERANCE ANALYSIS......Page 239 Tolerance Analysis Overview......Page 240 4.2.2.1 Surface Profile and Line Profile Deviation......Page 242 Machining Surface Accuracy Analysis......Page 243 4.2.4.1 Surface Sensitivity on Locators......Page 245 Implementation......Page 247 FIXTURING STABILITY ANALYSIS......Page 251 Kinetic Fixture Model......Page 252 Derivation of the Fixture Stiffness Matrix......Page 253 4.3.3.1 Friction Cone......Page 259 Minimum Clamping Forces......Page 260 4.3.4.1 CSI Sensitivity Matrix......Page 261 4.3.4.2 Search for Minimal Clamping Forces......Page 262 Clamping Sequence and Stability......Page 263 Implementation......Page 265 Conclusion......Page 267 References......Page 268 DEFORMATION OF FIXTURED WORKPIECE......Page 271 Element Type......Page 273 Fixture Component Model......Page 274 Optimization Analysis......Page 275 Material......Page 283 Load Case......Page 290 Design Set 3......Page 295 Clamp......Page 298 5.2.1 Introduction......Page 303 5.2.2 CAFD with Predictable Fixture Stiffness......Page 305 5.2.3.1 FEA Formulation......Page 308 5.2.3.2 Contact Conditions......Page 314 Sliding Condition. The slide motion will occur when the absolute value of is more than . The slide motion may occur in both element t and ( directions. That is, if , then......Page 315 5.2.4 Modeling Validation......Page 316 5.2.5 Conclusions......Page 322 5.3.1 Introduction......Page 323 5.3.2 Theoretical Formulation of Normal Contact Stiffness......Page 325 5.3.3 Theoretical Formulation of Tangential Contact Stiffne......Page 330 5.3.4 Experiment Identification of Contact Stiffness......Page 335 5.3.4.1 Identification of Normal Contact Stiffness......Page 336 5.4.1 A Proof of Orthogonality of the Natural Modes......Page 342 5.4.2 Static Measurement of Normal Contact Stiffness......Page 344 FIXTURE MODELING......Page 356 MODELING OF LOCATING DEVIATION......Page 360 LOCATING CHARACTERISTICS ANALYSIS......Page 365 Example 1. In a surface grinding operation, a workpiece is l......Page 373 Example 2. Figure 6.7 shows a knuckle with 3-2-1 locating. T......Page 375 Example 3. In a surface grinding operation, a workpiece is l......Page 378 LOCATOR AND CLAMP CONFIGURATION CHARACTERISTICS......Page 382 Example 4. Consider the planar locating of a polygonal workp......Page 386 Locating errors associated with workpieces are determined by......Page 395 6.5.2.1 Evaluation Index of Locator Configurations......Page 398 6.5.2.4 Fixture Planning Index......Page 402 This section first defined three performance indexes: the lo......Page 416 Index......Page 422 Fixtures--the component or assembly that holds a part undergoing machining--must be designed to fit the shape of that part and the type of machining being done. This book discusses the fundamentals of Computer-Aided Fixture Design (CAFD) techniques and covers fixture planning, fixture design (both modular and dedicated fixtures), fixture design verifications, and the overall integration with CAD/CAM. The book shows how CAFD may lead to a significant reduction of product and process development time and production cost, and how CAFD can increase quality assurance through simulation and science-based technical specification and cost estimation in business quoting, especially in current supplier-based manufacturing. It also provides case study examples.

* This book provides a total solution of CAFD, including planning, design, and design verification
* Practical and comprehensive theoretical analysis of fixturing from real industrial application projects
* Introduces the integration of fixture design and analysis with CAD/CAM so that detailed geometric information can be processed and complex fixture designs can be designed and analyzed "Advanced Computer-Aided Fixture Design discusses the fundamentals of Computer-Aided Fixture Design (CAFD) techniques and covers fixture planning, the design of both modular and dedicated fixtures, and the integration with CAD/CAM. The book uses case studies to introduce the applications of CAFD to industry, and shows how CAFD may lead to a significant reduction of product and process development time and production cost. The reader will learn how CAFD can increase quality assurance through simulation and science-based technical specification and cost estimation in business quoting, especially in current supplier-based manufacturing." "This book can be used as either a textbook for advanced engineering courses, or as a reference for engineers in manufacturing and industry. The reader will benefit from the techniques introduced in solving production problems, will gain the skills to compare fixture design alternatives, and will learn to develop applications systems for fixture design and analysis."--Jacket In a report on manufacturing technology, it was estimated that during the latter half of the 1990s the innovations in manufacturing technologies contributed nearly $1 trillion to the U.S. economy.