This state-of-the-art book highlights recent advances and discussions in tribological technologies in sheet metal forming. The contents focus on the fundamentals to the more complex topics such as micro contact and lubricant behaviors, FEM analysis in deep drawing process, usage of tribo-simulators, friction behavior in flat sliding, tribological numerical modeling, and simulation of seizure. This book is a useful reference for academicians and researchers in the field of lubrication, sheet metal forming, and tooling.

Autorentext

Dr. Akira Azushima is Professor Emeritus at Yokohama National University, Japan. He is also Emeritus Member of societies such as College International pour la Recherche en Productique (CIRP), ICFG, Japan Society for Technology of Plasticity (JSTP). His research interests include the friction law in metal forming, direct observation of interface between tool and workpiece, tribological numerical modeling, and simulator for evaluation of tribological factor. He has authored over 100 articles in journals of national and international repute.

Inhalt

1.Direct Observation of Lubrication Behavior

1.1 Direct Observation in Drawing between Flat Dies

1.2 Direct Observation in Sheet Drawing 1.3 Lubro 3D Measurement of Oil Film Thickness of Interface

2.Friction Behavior in Drawing between Flat Dies

2.1 New Tribo-Simulator Controlled by Computer 2.2 Effect of Lubricant Viscosity and Additive on Coefficient of Friction

2.3 Effect of Yield Stress on Coefficient of Friction

2.4 Effect of Bulk Deformation of Specimen on Coefficient of Friction

2.5 Effect of Back Tension on Coefficient of Friction

3. Friction Behavior in Flat Sliding

   3.1 Apparatus and Characteristic of Flat Sliding

   3.2 Effect of Surface Topography on Coefficient of Friction of Steel Sheet

   3.3 Effect of Contact Length on Coefficient of Friction of Steel Sheet

   3.4 Friction Behavior in Flat Sliding of Plated Steel Sheet

   4.Friction Behavior in Repeatedly Flat Sliding

   4.1 Apparatus and the Characteristic

   4.2 Effect of Yield Stress on Coefficient of Friction

   4.3 Friction Behavior of Repeatedly Flat Sliding of Plated Steel Sheet

   5.Friction Behavior in Tension-Bending

   5.1 Surface Behavior of Specimen with Smooth Surface in Sliding under Tension-Bending

   5.2 Surface Behavior of Specimen with Dull Surface in Sliding under Tension-Bending

   5.3 Direct Observation of Micro-Contact Behavior at Interface in Sliding under Tension-Bending

   6.Friction Behaviors in Ironing

   6.1 Coefficient of Friction by Fundamental Tribo-Simulator

   6.2 Coefficient of Friction of Commercial Oil by New Tribo-Simulator

   7.FEM Analysis in Friction Behavior in Deep Drawing

   7.1 Measurement of Punch Load in Deep Drawing

   7.2 FEM Analysis of Punch Load in Deep Drawing

   7.3 Effect of Friction Behavior on Formability in Deep Drawing

4. Tribological Numerical Modeling in Sheet Drawing

   8.1 Coefficient of Friction

   8.2 New Coefficient of Friction

   8.3 Tribological Numerical Modeling for Coefficient of Friction in Sheet Drawing

   8.4 Tribological Numerical Modeling in Sheet Drawing

   8.5 Numerical Calculation of Coefficient of Friction 9.Simulation of Seizure in Sheet Metal Forming

   9.1 Simulation of Seizure in Flat Sliding Test

   9.2 Simulation of Seizure in Repeatedly Flat Sliding Test 9.3 Simulation of Seizure in Ironing

5. Lubrication in Hot Stamping

   10.1 Development of Tribo-Simulator for Lubrication in Hot Stamping

   10.2 Lubrication in Hot Stamping of Aluminum-Coated 22MnB5 Steel 10.3 Friction Behavior in Hot Stamping of AA7075 Aluminum Alloy