Evaluating the welding quality of longitudinal welds in a hollow profile manufactured by porthole die extrusion: Experiments and simulation

2019 ◽  
Vol 38 ◽  
pp. 502-515 ◽  
Author(s):  
Junquan Yu ◽  
Guoqun Zhao ◽  
Weichao Cui ◽  
Liang Chen ◽  
Xiaoxue Chen
Keyword(s):  
Welding Quality ◽  
Porthole Die ◽  
Die Extrusion ◽  
Longitudinal Welds ◽  
Porthole Die Extrusion

FEM simulation of welding quality in porthole die extrusion

2011 ◽  
Vol 26 (2) ◽  
pp. 292-295 ◽  
Author(s):  
Youfeng He ◽  
Shuisheng Xie ◽  
Lei Cheng ◽  
Guojie Huang ◽  
Yao Fu
Keyword(s):  
Fem Simulation ◽  
Welding Quality ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion

Simulation Analysis of Aluminum Circular Tube in a Two-Stage Porthole Dies Extrusion Process

2017 ◽  
Vol 898 ◽  
pp. 1305-1311
Author(s):  
Ning Xu ◽  
Dong Nan Huang ◽  
Zhao Xin Du ◽  
You Lai Li
Keyword(s):  
Surface Quality ◽  
Simulation Analysis ◽  
Metal Flow ◽  
Single Stage ◽  
Extrusion Force ◽  
Two Stage ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion

The single stage porthole die extrusion was largely applied in our research and industrial production. Two stage porthole die for a hollow aluminum tube, which added a pre-porthole die in front of the conventional porthole die, could slow down the metal deformation rate and control the metal flow uniformity. We performed a simulation of hollow aluminum extrusion in single stage porthole die and two stage porthole die. Through a series of numerical simulation based on Forge software, the advantage of two-stage porthole die extrusion, such as the surface quality of extruded profile, extrusion force, welding quality and die stress, was studied. The results showed that the pressure of welding and required extrusion force decreased and the surface quality of the extruded profile would be improved. Thus, we could prolong the work life of mandrel root by the means of this method.

3D FEM-NEM Material Joining Simulation in Porthole Die Extrusion

2011 ◽  
Vol 491 ◽  
pp. 151-158 ◽  
Author(s):  
Francesco Gagliardi ◽  
I. Alfaro ◽  
Luigino Filice ◽  
E. Cueto
Keyword(s):  
Finite Element ◽  
Complex Geometry ◽  
Experimental Investigations ◽  
3D Analysis ◽  
3D Fem ◽  
Positive Effects ◽  
Tube Extrusion ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion

The conventional tube extrusion process has been substituted by porthole die extrusion due to relevant advantages in terms of productivity and quality. However, the porthole die has a complex geometry to be effectively designed; consequently, several studies can be found out in the technical literature based on experimental and finite element analyses of the process. From this point of view, while the experimental investigations entail cost and time increasing, due to the die building complexity, finite element techniques present some drawbacks such as the difficulty to simulate material joining and the loss of accuracy due to the heavy mesh distortion and related remeshing. Therefore, the introduction of new numerical techniques for the analyses of this process could have positive effects. In this paper, the Natural Element Method (NEM) together to the alpha shapes and some extra numerical procedures are used in the simulation of tube extrusion, focusing the attention on the simulation of the welding line in a fully 3D analysis. The obtained results are compared with the finite element and experimental ones, measuring the accuracy of the proposed methodology.

Effects of Process Parameters on Charge Weld Length during Multi-Hole Porthole Die Extrusion

2014 ◽  
Vol 703 ◽  
pp. 141-145 ◽  
Author(s):  
Liang Chen ◽  
Guo Qun Zhao ◽  
Ting Ting Wang
Keyword(s):  
Finite Element ◽  
Process Parameters ◽  
Optimal Process ◽  
Extrusion Speed ◽  
Billet Temperature ◽  
Porthole Die ◽  
Element Simulation ◽  
Die Extrusion ◽  
Charge Weld ◽  
Porthole Die Extrusion

The evolution of charge weld during multi-hole porthole die extrusion was studied by means of finite element simulation and Taguchi’s design. Moreover, based on S/N analysis, the optimal process parameters that can reduce the charge weld length was obtained, where the billet diameter is 100 mm, extrusion speed is 2.0 mm/s, tool temperature is 430 °C and billet temperature is 465 °C. The accuracy and effectiveness of such optimal process parameters were also verified. The purpose of the present study is to provide some information about the controlling of charge weld for extrusion engineers.

Physical Simulation of Longitudinal Welding in Porthole-Die Extrusion

CIRP Annals ◽  
2006 ◽  
Vol 55 (1) ◽  
pp. 287-290 ◽  
Author(s):  
P.F. Bariani ◽  
S. Bruschi ◽  
A. Ghiotti
Keyword(s):  
Physical Simulation ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion
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