Analysis of longitudinal weld seam defects and investigation of solid-state bonding criteria in porthole die extrusion process of aluminum alloy profiles

2016 ◽  
Vol 237 ◽  
pp. 31-47 ◽  
Author(s):  
Junquan Yu ◽  
Guoqun Zhao ◽  
Liang Chen
Keyword(s):  
Aluminum Alloy ◽  
Solid State ◽  
Weld Seam ◽  
Extrusion Process ◽  
Solid State Bonding ◽  
Porthole Die ◽  
Longitudinal Weld Seam ◽  
Die Extrusion ◽  
Porthole Die Extrusion

An optimizing process of profiled cross-sectional aluminum alloy porthole die extrusion using response surface methodology

2016 ◽  
Vol 30 (08) ◽  
pp. 1650098 ◽  
Author(s):  
Fujian Zhou ◽  
Feng Li ◽  
Liansheng Shi ◽  
Hongwei Jiang
Keyword(s):  
Aluminum Alloy ◽  
Friction Factor ◽  
Cross Section ◽  
Ultimate Load ◽  
Initial Temperature ◽  
Extrusion Process ◽  
Extrusion Speed ◽  
Porthole Die ◽  
Die Extrusion ◽  
Porthole Die Extrusion

The porthole die extrusion process of profiled cross-section hollow aluminum alloy is influenced by numerous factors, which brings inconvenience to the process design. In this paper, 7075 aluminum alloy is taken as an example, the fitting model of the ultimate load is analyzed by variance and regression analysis using response surface method (RSM). The influences of extrusion speed, friction factor and initial temperature on the change of extruded ultimate load are investigated systematically, and the important influence factors (initial temperature [Formula: see text] friction factor [Formula: see text] extrusion speed) to the load are determined eventually. By comparison, the error between the ultimate load model obtained after fitting and the calculated value is only 2.4%, further verifying the reliability of this model. The optimal objective is to minimize the ultimate load, then the optimum technological parameters are obtained by optimizing the process, where the initial temperature, the extrusion speed and the friction factor are 430[Formula: see text]C, 2.28[Formula: see text]mm/s and 0.31, respectively. The results provide a theoretical basis for the scientific design of the porthole die extrusion process of profiled cross-section hollow aluminum alloy.

Effects of Multi-Step Welding Chamber on Extrusion Product Quality and Die Strength

2010 ◽  
Vol 44-47 ◽  
pp. 311-315
Author(s):  
Hao Chen ◽  
Guo Qun Zhao ◽  
Cun Sheng Zhang ◽  
Dao Sheng Wen
Keyword(s):  
Product Quality ◽  
Maximum Stress ◽  
Metal Flow ◽  
Extrusion Process ◽  
Porthole Die ◽  
Die Life ◽  
Die Extrusion ◽  
Extrusion Product ◽  
Porthole Die Extrusion ◽  
Key Parameter

The shape of welding chamber is a key parameter in flat porthole die extrusion process, which influences product quality and die life-span directly. In this paper, by means of numerical simulation of the extrusion process for an aluminum hollow profile, the effects of multi-step welding chamber on metal flow and die strength have been investigate. The numerical results revealed that the multi-step welding chamber was effective to balance metal flow in the die cavity. In addition, with an increasing step of welding chamber, the maximum stress and deflection of the lower die decreased, while the deflection of the mandrel kept almost unchanged and the maximum stress of upper die increased.

Study on solid bonding behavior of AZ31 Mg alloy during porthole die extrusion process

2017 ◽  
Vol 93 (5-8) ◽  
pp. 2791-2799 ◽  
Author(s):  
Jixiao Zhang ◽  
Liang Chen ◽  
Guoqun Zhao ◽  
Cunsheng Zhang ◽  
Jixue Zhou
Keyword(s):  
Extrusion Process ◽  
Mg Alloy ◽  
Porthole Die ◽  
Az31 Mg Alloy ◽  
Die Extrusion ◽  
Porthole Die Extrusion

Numerical Simulation Analysis on Porthole Dies Extrusion of Aluminum Mini-Thin Harmonica-Shaped Tube

2013 ◽  
Vol 457-458 ◽  
pp. 156-159
Author(s):  
Fu Li Lu ◽  
Ji Shun Song ◽  
Jian Zhang
Keyword(s):  
Simulation Analysis ◽  
Cooling System ◽  
Metal Flow ◽  
Extrusion Process ◽  
Porthole Die ◽  
Shaped Tube ◽  
Mean Pressure ◽  
The Mean ◽  
Die Extrusion ◽  
Porthole Die Extrusion

This paper describes a 3D-deform simulation of porthole die extrusion process for producing harmonica-shaped tubes used for a cooling system of automobiles. Designing the related structure of the porthole die and observing the simulation results, the study was designed to evaluate the welding effect when the length of bearing exit take different values.The mean pressure and exit velocity at the welding plane are analyzed at the same time. The welding effect is determined by the mean pressure at the welding plane .The behavior of metal flow in the container is analyzed in this paper. Through the above analysis, the best structure and size can be obtained in the process of deformation so as to obtain the better machanical properties.

Sign in / Sign up

Export Citation Format

Share Document