Prediction of Defects in Multistage Cold Forging by Using Finite Element Method

Fabio Bassan; Paolo Ferro; Franco Bonollo

doi:10.4028/www.scientific.net/KEM.622-623.659

Paper Titles

Efficient Numerical Simulation of Steady-State Metal Forming Processes by an Iterative Surface Calculation
p.625

Finite Element Simulation of Formed Steel Components
p.632

Multiscale Modelling of Mechanical Properties of Steel Deformed in Semi-Solid State – Experimental Background
p.643

Physical and Numerical Modelling of Wire Drawing Process of Mg Alloys in Heated Dies Accounting for Recrystallization
p.651

Prediction of Defects in Multistage Cold Forging by Using Finite Element Method
p.659

Prediction of Life of Compound Die Using Artificial Neural Network (ANN)
p.664

Slab Analysis and FEM Simulation on Rotating Compression Forming of Double-Layer Clad Cylinder under Constant Shear Friction
p.672

Viscoplastic Damage Constitutive Modelling of High-Speed Railway Axle Steel 25CrMo4
p.679

FFT-Based Modelling of Transformation Plasticity in Polycrystalline Materials during Diffusive Phase Transformation
p.687

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Prediction of Defects in Multistage Cold Forging by Using Finite Element Method

Abstract:

In this work, the formation mechanisms of surface defects in multistage cold forging of axisymmetrical parts have been studied through FEM simulations. As case history, the industrial production of an heating pipe fitting by cold forging has been analyzed. Based on simulated flow behaviour of material, several types of surface defects are identified and attributed to plastic instability of the work-material, inappropriate axial/radial flow ratio, excessive forming-pressure and uncorrect tooling design. The results of the FE model are finally compared with those obtained from real forging process and good agreement is observed.