Advanced fixture design method and its application / / Guohua Qin

• Autore: Qin Guohua
• Pubblicazione: Gateway East, Singapore : , : Springer, , [2021]; ©2021
• Descrizione fisica: 1 online resource (344 pages)
• Disciplina: 670
• Soggetto topico: Manufacturing processes
• Nota di contenuto: Intro -- Preface -- Contents -- 1 Introduction -- 1.1 Fixturing Method -- 1.1.1 Alignment Fixturing -- 1.1.2 Fixture Fixturing -- 1.2 Fixture Structure -- 1.2.1 Types of Fixtures -- 1.2.2 Configuration of Fixtures -- 1.3 Fixture Design -- References -- 2 Analysis of Locating Determination -- 2.1 Model of Theoretical DOF -- 2.1.1 Relationship Between Machining Requirements and DOFs -- 2.1.2 Establishment of Theoretical DOF Model -- 2.1.3 Undetermined Coefficient Method -- 2.1.4 Solving Rank Method -- 2.2 DOF Level Model of Position Sizes -- 2.2.1 Position Size of Plane Relative to Plane -- 2.2.2 Position Size of Line Relative to Plane -- 2.2.3 Position Size of Plane Relative to Line -- 2.2.4 Position Size of Line Relative to Line -- 2.3 DOF Level Model of Orientations -- 2.3.1 Relation Between Parallelism Tolerance and DOFs -- 2.3.2 Relation Between Perpendicularity/Inclination Tolerance and DOFs -- 2.4 DOF Level Model of Locations -- 2.4.1 Relation Between Coaxiality Tolerance and DOFs -- 2.4.2 Relation Between Symmetry Tolerance and DOFs -- 2.4.3 Relation Between Position Tolerance and DOFs -- 2.4.4 Relation Between Runout Tolerance and DOFs -- 2.5 Model of Locating Point Layout -- 2.5.1 Establishment of Locating Point Layout Model -- 2.5.2 Solution of Locating Point Layout Model -- 2.6 Judgment Criteria of Locating Determination -- 2.6.1 Theoretical Condition -- 2.6.2 Process Condition -- 2.6.3 Corollary and Flowchart -- 2.7 Application and Analysis -- 2.7.1 Verification of Locating Point's Number -- 2.7.2 Verification of the Layout of Locating Points -- References -- 3 Analysis of Workpiece Stability -- 3.1 Modeling of Workpiece Stability -- 3.1.1 Static Equilibrium Conditions -- 3.1.2 Friction Cone Constraints -- 3.1.3 Analysis Model -- 3.2 Solution Techniques -- 3.2.1 Linear Programming Techniques. ; 3.2.2 Solution to the Model of Form-Closure -- 3.2.3 Solution to the Model of Force-Closure -- 3.3 Numerical Examples -- 3.3.1 Analysis of Force Existence -- 3.3.2 Analysis of Force Feasibility Without Friction -- 3.3.3 Analysis of Force Feasibility with Friction -- References -- 4 Analysis of Clamping Reasonability -- 4.1 Local Deformation -- 4.1.1 Contact Deformation -- 4.1.2 Fixel Deformation -- 4.1.3 Local Deformation -- 4.2 Workpiece Position Error -- 4.2.1 Static Equilibrium Equation -- 4.2.2 Friction Cone -- 4.2.3 Relationship Between Local Deformation and Contact Force -- 4.2.4 Relationship Between Workpiece Position Error and Local Deformation -- 4.2.5 Solution Method -- 4.3 Workpiece Deformation -- 4.4 Modeling of Clamping Reasonability -- 4.5 Application and Analysis -- 4.5.1 Analysis of the Clamping Error Due to the Weak Stiffness Workpiece -- 4.5.2 Evaluation of the Clamping Error of High Stiffness Workpiece -- References -- 5 Analysis of Workpiece Attachment/Detachment -- 5.1 Attachment and Detachment Model -- 5.2 Judgment Method of the Attachment and Detachment -- 5.3 Analysis Algorithm of the Attachment and Detachment Direction -- 5.3.1 Calculation Algorithm of the Generator Matrix of the Non-Positive Dual Matrix -- 5.3.2 Classification Method of Coefficient Matrix -- 5.3.3 Application of Pivot Algorithm -- 5.4 Analysis and Application of Attachment and Detachment -- 5.4.1 Three Dimensional Workpiece -- 5.4.2 Two Dimensional Workpiece -- References -- 6 Analysis of Locating Accuracy -- 6.1 Analysis Model -- 6.1.1 Locating Source Error -- 6.1.2 Workpiece Position Error -- 6.1.3 Locating Error -- 6.2 Position Error Model of Contact Point -- 6.2.1 Directional Dimension Path -- 6.2.2 Directional Dimension Chain -- 6.3 Examples and Experiments -- 6.3.1 One Vee Bloke-One Supporting Pin Locating Scheme. ; 6.3.2 Two Cylindrical Pins Locating Scheme -- 6.3.3 One Plane-Two Holes Locating Scheme -- 6.3.4 Experimental Validation -- References -- 7 Selection Algorithm of Locating Datum -- 7.1 Hierarchical Structure Model -- 7.1.1 Surface Roughness -- 7.1.2 Surface Feature -- 7.1.3 Valid Locating Domain -- 7.1.4 Dimension Error -- 7.2 Judgement Matrix -- 7.3 Layer Weight Vector -- 7.4 Combination Weight Vector -- 7.5 Reconstruction of Judgment Matrix -- 7.6 Algorithm and Application -- 7.6.1 Algorithm and Flow -- 7.6.2 Practical Example -- References -- 8 Planning Algorithm of Locating Point Layout -- 8.1 Locating Point Layout Scheme -- 8.2 Causes of Locating Non-determination -- 8.3 Generative Planning Algorithm -- 8.4 Application and Design Process -- References -- 9 Planning Algorithm of Clamping Forces for Rigid Workpieces -- 9.1 Mechanical Model of Fixturing Scheme -- 9.1.1 Workpiece Static Equilibrium Constraints -- 9.1.2 Direction Constraints -- 9.2 Analysis of Force Existence -- 9.3 Analysis of Force Feasibility -- 9.4 Planning Algorithm of 1-clamping Force -- 9.5 Planning Algorithm of n-clamping Force -- 9.6 Calculation of Clamping Forces -- 9.6.1 Single Clamping Force of 2D Workpiece -- 9.6.2 Single Clamping Force of 3D Workpiece -- 9.6.3 Double Clamping Forces of 2D Workpiece -- References -- 10 Determination Method of Clamping Point Layout for Rigid Workpieces -- 10.1 Workpiece Stability -- 10.1.1 Stability Index -- 10.1.2 Stability Measurement -- 10.2 Planning Algorithm of Application Region -- 10.3 Planning Method of Fixturing Layout -- 10.4 Numerical Tests of Application Region Planning -- 10.4.1 Planning of Application Region for One Clamping Force -- 10.4.2 Calculation of Stable Region in Dynamic Machining Process -- 10.4.3 Planning of Application Region for Multiple Clamping Forces -- 10.5 Examples of Fixturing Layout Optimization. ; 10.5.1 Fixturing Layout Optimization of 2D Workpiece -- 10.5.2 Fixturing Layout Optimization of 3D Workpiece -- References -- 11 Fixturing Layout Optimization of Thin-Walled Workpieces -- 11.1 Finite Element Analysis of Fixturing Deformation -- 11.1.1 Static Equilibrium Conditions -- 11.1.2 Friction Cone Constraints -- 11.1.3 Unilateral Contact Constraints -- 11.2 Prediction Method for Fixturing Deformation -- 11.2.1 Structure of Neural Network -- 11.2.2 Selection of Training Samples -- 11.2.3 Update of Weight Coefficients -- 11.3 Optimization Technology of Fixturing Layout -- 11.3.1 Optimal Model -- 11.3.2 Solution Technology -- 11.4 Numerical Tests and Experiments -- 11.4.1 Prediction of Workpiece Deformation -- 11.4.2 Optimization of Fixturing Layout -- References -- 12 Matching Method of Fixture Elements -- 12.1 Analytical Hierarchy Process -- 12.2 Construction of Hierarchical Structure Model -- 12.2.1 Structural Model -- 12.2.2 Selection Factor -- 12.3 Determination of Layer Weight Vector for Criterion Layer -- 12.3.1 Construction of Judgement Matrix -- 12.3.2 Check of Consistency -- 12.4 Determination of Layer Weight Vector for Scheme Layer -- 12.4.1 Construction of Judgment Matrix -- 12.4.2 Check of Consistency -- 12.4.3 Decision Index of Locators -- References -- Correction to: Advanced Fixture Design Method and Its Application -- Correction to: G. Qin, Advanced Fixture Design Method and Its Application, https://doi.org/10.1007/978-981-33-4493-8.
• Titolo autorizzato: Advanced Fixture Design Method and Its Application
• ISBN: 981-334-493-8
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9910483332603321
• Lo trovi qui: Univ. Federico II