Advanced Technology of Plasticity 1987: Proceedings of the Second International Conference on Technology of Plasticity Stuttgart, August 24/28, 1987

ISBN-13: 9783662110485 / Angielski / Miękka / 2014 / 1373 str.

Kurt Lange

Opis

This conference offers the opportunity to cover all plastic working operations from primary processes such as rolling, extrusion and drawing to secondary processes such as sheet metal forming, forging, roll forming, stretch forming, spinning, and flow turning. This "horizontal" organization of the conference is overlaid by the "vertical" organization which covers fundamentals such as material science, theory of plasticity, tribology as common scientific and technical disciplines and, furthermore, the role of computers, e.g. in process modelling, process control, process simulation, CAD/CAM/CIM/CAE etc., as well as tools and, machine tools including flexible manufacturing cells and systems.

Spis treści

Stretching, Ironing, Spinning.- Deformation and Formabi lity in Bore-Expanding Of Metal Sheets from the Aspect of Anisotropic Yield Characteristics.- Simulation of Sheared Edge Behaviour in Stretch Flanging by a Modified Fukui Test.- An Improvement in Ironing of Deep Drawn Cans.- Roller Pass Programming in Conventional Spinning by NC Spinning Machine.- A Finite Element Modelling for Deep Drawing of Thin Sheet in Automotive Industry.- Influence of Plastic Anisotropy on Deformation of Thin-Walled Tubes in Bulge Forming.- Influence of a Surface Defect on the Stretch Formability of Sheet Metals.- New Formula for Calculating the Coefficient of Limit in Hole Flanging.- A Contribution to Deep Drawing with Simultaneous Ironing of very Thin Sheet Material.- Rolling.- Mashy-State Rolling of Composite Sheets.- The Upper Bound Solution for Three-Dimensional Deformation in Roll Forging of Blank.- New Approach for Predicting Ring Rolling Procedure.- Rheological Interpretation to Prevent Faults Observed in Products on Ring Rolling Process.- Study on Bending-Rolling Combined Forming Technique.- Solid Phase Roll Cladding of Bimetallic Strip by Cross Shear Cold Rolling.- Mechanism of Polygonning Formation of Tube Bore in Stretch Reducing.- New Control System for Ringrolling.- CAD Application in Forge Rolling.- Simulation of Ring Rolling Process.- Drawing (bar, wires, tubes).- Keynote Paper: The influence of Strain Path on Wire Properties.- Finite Element Analysis of the Shear Strain in the Axisymmetric Drawing.- Simulation of Drawing-Processes by the Finite Element Method.- Wire Drawing at Elevated Temperatures: Experimental and Theoretical Comparison.- Cup-Shaped Defect in Copper Wires Drawn from Rods of Continuous Casting and Rolling.- Experimental Mechanics of Shaped Bar Drawing.- Tribology.- Keynote Paper: Friction Laws in Metal Forming Tribology.- A Model for the Characterization of Friction Resistance to Sliding as a Function of Load, Speed and Viscosity and Geometry.- The Push-Drawn-Test, a New Method for Determination of Friction Coefficient on Condition of Plastic Deformation.- Adhesion Strength of Phosphate Coatings in Cold Forming.- Effect of Tool Workpiece Contact Length on Friction Coefficient in Metal Forming.- Flattening of Rough Expanding of Plastically Deformed Bulk Loaded with a Flat and Hard Plate.- A Friction and Lubrication Test for Cold Forging.- Lubrication in Isothermal Forging with Ceramic Dies.- Press Joining of Especially Coated Steel and Aluminium Sheets.- Powder Metal Forming.- Keynote Paper: Generation of Metal Products with New Properties by Combined Powder Metallurgy and Deformation Processes.- Modelling of Aluminium Alloy Powder Hot Forging Process in View of Computer Aided Design (CAD) of Preform.- Application of the Finite Element Method to P/M Forming Processes.- New Yield Function for Forming Processes of Porous Materials.- A Modified Slip-Line Field Theory for Sintered Porous Metals.- Forging.- Keynote Paper: State of the Art and Trends in Hot Forging.- Simulation and Limit State in Metal Forming.- Numerical Method for Plastic Working Processes in Three Dimensions.- A Criterion for Ductile Fracture in Cold Forging.- Keynote Paper: Process Simulation of Hot Die Forging Processes.- An Analysis of Void Crushing during Flat Die Free Forging.- Computer-Aided Roll Forging.- Thermo-Mechanical Finite Element Calculation of Three-Dimensional Hot Forging with Remeshing.- Analysis of the Closing and Consolidation of Internal Cavities in Heavy Rotor Forgings by Finite Element Method.- Finite Element Modelling of a Radial Forging Process.- Improved Properties of Forged Superalloys — Results of a Better Modelling and Controlling of the Forging Process.- Metal Flow and Tool Stress in Cold Forging of Gear Components.- Investigation into Forming Processes of Various Spur Gears.- Simulation of Plane Strain H — Shape Forging Using Non-FEM Method.- Finite Element Simulation of Metal Flow around Round Corner of Tool.- Material Influences on Plastic Flow Localization and Instability in Metal Processing.- NC-Radial-Forging — Present State of Further Development.- Problems of Introducing FMC in Forging.- Fundamentals: Sheet Forming.- Keynote Paper: State of the Art of Sheet Metal Forming and Future Trends.- Mechanics of Drawing with Rubber Pads.- Deep-Drawing of Shells with Bi-Level Bottoms.- Deformation Mechanism in a Dual Phase Steel.- Initiation of Buckling in Anisotropic Metal Sheet.- State of Development in the Forming of Thick Sheet Metal.- Process Simulation and Adaptive Control in Sheet Metal Forming.- Production of Small Batch Quantities Employing Flexible Production Systems in Metal Forming.- Tooling Concepts for Large Transfer Presses A Quantum Leap in Production Technology of Large Automotive Body Panels.- Process-Simulation (Bulk).- Keynote-Paper: Process Design in Metal Forming by the Finite Element Method.- Physical Simulation for Metal Forming with Strain Rate Sensitive Model Material.- Multi-Level Simulation of Metal Forming Processes.- Modelling of Free Large Processes by Photo-electric Scanning Moire Method.- Materials Modelling and Intrinsic Workability for Simulation of Bulk Deformation.- Drawing (Sheet).- Keynote Paper: Interactions between Cold Rolled Sheet Steel and Forming Process.- Simulation of the Buckling Phenomenon in Sheet Metal Forming by a Test on Flat Circular Specimens.- FEM Simulation of Surface Roughening and its Effects on Forming Limit in Stretching of Aluminium Sheets.- Effect of Forming Temperature on the Deep Drawability of Aluminium Alloy Sheets.- Temperature Dependency of Mechanical Properties of Steel Sheets and its Application to Deep Drawing in Warm Condition.- Earing and Delayed Cracking of Deep-Drawn Cup of Austenitic Stainless Steel Sheets.- An Improvement in Deep Drawability of Steel/Plastic Laminate Sheets by Control of Blank Holding Force.- Blank-Holder Pressure and Blank-Holder Layout in Deep Drawing of Thin Sheet Metal.- Extrusion Augmented Drawing — A New Technique for Forming Protrusion.- Improvement of Tooth Profile Accuracy in Finish Gear Rolling of Helical Gears.- A New Cladding Process Combining Bulge Forming and Squeeze Casting.- Investigations of the “Grob” Cold Shape-Rolling Process.- Superplasticity and Grain Boundary Relaxation in High Carbon Tool Steel.- Theoretical Prediction on Non-Axisymmetric Buckling in Tube Nosing.