scholarly journals Hot gas bulging of sealed aluminium alloy tube using resistance heating

2014 ◽  
Vol 1 ◽  
pp. 5 ◽  
Author(s):  
Tomoyoshi Maeno ◽  
Ken-ichiro Mori ◽  
Kouji Fujimoto
Keyword(s):  
Aluminium Alloy ◽  
Resistance Heating ◽  
Hot Gas ◽  
Alloy Tube

Development of the Hot Gas Bulging Process for Aluminium Alloy Tube Using Resistance Heating

2009 ◽  
Vol 410-411 ◽  
pp. 315-323 ◽  
Author(s):  
Tomoyoshi Maeno ◽  
Kenichiro Mori ◽  
Kouji Fujimoto
Keyword(s):  
Thermal Conductivity ◽  
Internal Pressure ◽  
Aluminium Alloy ◽  
High Heat ◽  
Expansion Ratio ◽  
Copper Electrode ◽  
Resistance Heating ◽  
Hot Gas ◽  
Alloy Tube ◽  
Stainless Steel Ring

A hot gas bulging process of an aluminium alloy tube using resistance heating, set into a forming machine, was developed. The tube was rapidly heated by the electrifying to increase the formability and to decrease the flow stress. The tube was bulged by thermally expanding the air sealed in the tube without control of internal pressure during the forming. Hot gas bulging of an aluminium alloy tube without and with axial feeding was performed. The effects of the initial internal pressure and the current on the expansion ratio of the tube were examined. The decrease in temperature around the contact with the electrode was prevented by inserting a stainless steel ring having low thermal conductivity and high heat generation between the copper electrode and tube, and thus the bulging length was increased. It was found that the hot gas bulging is effective in heightening the formability of the aluminium alloy tubes.

Optimisation of Condition in Hot Gas Bulging of Aluminium Alloy Tube Using Resistance Heating Set into Dies

2011 ◽  
Vol 473 ◽  
pp. 69-74 ◽  
Author(s):  
Tomoyoshi Maeno ◽  
Kenichiro Mori ◽  
Chihiro Unou
Keyword(s):  
Thermal Expansion ◽  
Internal Pressure ◽  
Aluminium Alloy ◽  
Deformation Behaviour ◽  
Glass Plate ◽  
Resistance Heating ◽  
Hot Gas ◽  
Axial Feeding ◽  
Alloy Tube

A hot gas bulging process of an aluminium alloy tube using resistance heating set into a die was developed. In the developed process, the tube was heated during the forming, and thus the drop in temperature was prevented. The control of the hot gas bulging was simplified by sealing air in the tube. The tube was bulged by thermal expansion of the air sealed in the tube without control of internal pressure during the forming. Hot gas bulging of an aluminium alloy tube without and with the axial feeding was performed. The deformation behaviour of the tube in the die was observed by a heatproof glass plate inserted in the die. The timing of the axial feeding, the feeding velocity and the amount of the axial feeding were optimised.

Evolution Regularity of Temperature Filed in Hot Power Backward Spinning for 7075 Cast Aluminium Alloy Tube

2013 ◽  
Vol 774-776 ◽  
pp. 1170-1173 ◽  
Author(s):  
R.Y. Zhang ◽  
S.J. Tu ◽  
G.Y. Zhao ◽  
J. Wang ◽  
Z.H. Guo
Keyword(s):  
Aluminium Alloy ◽  
Internal Surface ◽  
Fe Model ◽  
Outer Face ◽  
Key Factors ◽  
Ring Spinning ◽  
Alloy Tube ◽  
Temperature Filed ◽  
Spinning Process ◽  
Lock Ring

The spinning temperature is one of key factors affected the uneven deformation during the hot power backward spinning for brittle material tubes, such as cast 7075 aluminium alloy tube. To analyze the evolution regularity of temperature filed in the spinning process, a 3D thermo-mechanical FE model of the process is developed under ABAQUS/Explicit environment. Then, the evolution of temperature filed during the process is analyzed based on the FE model. The results show that: The contact areas temperatures between lock ring, spinning rollers and tube decrease sharply during the initial spinning stage. The high temperature region is transferred from unformed zone of the tube to the contact area between spinning roller and tube. In the spinning zone, the temperature of internal surface of the tube is apparently higher than that of outer face.

scholarly journals Bursting Prediction of Hydroforming Aluminium Alloy Tube based on Gurson-Tvergaard-Needleman Damage Model

2014 ◽  
Vol 81 ◽  
pp. 2211-2216 ◽  
Author(s):  
Buang Teng ◽  
Weinian Wang ◽  
Yinquan Liu ◽  
Shijian Yuan
Keyword(s):  
Aluminium Alloy ◽  
Damage Model ◽  
Alloy Tube

High rate constitutive modeling of aluminium alloy tube

2006 ◽  
Vol 134 ◽  
pp. 43-48 ◽  
Author(s):  
C. P. Salisbury ◽  
M. J. Worswick ◽  
R. Mayer
Keyword(s):  
Aluminium Alloy ◽  
Constitutive Modeling ◽  
High Rate ◽  
Alloy Tube

Effect of Tubes Length and Annealing Temperature on Energy Absorption of Aluminium Alloy Tube 6061-T6 under Inversion Collapse Mode

2013 ◽  
Vol 701 ◽  
pp. 82-86 ◽  
Author(s):  
Mohd Suhairil Meon ◽  
Muhamad Fauzi Othman ◽  
Mahamad Hisyam Mahamad Basri ◽  
Hazran Husain ◽  
Juri B. Saedon
Keyword(s):  
Aluminium Alloy ◽  
Energy Absorption ◽  
Compression Test ◽  
Annealing Temperature ◽  
Standard Procedure ◽  
Tube Length ◽  
Alloy Tube ◽  
Collapse Mode

The purposes of this study are to investigate the effect on variation of the specimens tube length and annealing temperature on the amount of energy absorption of Aluminium tubes (AA 6061) towards inversion collapse mode. The tests were performed on the Aluminium tubes using compression test according to ASTM E8 standard procedure. In this study, a quasi-static inversion tests were conducted in order to obtain the energy absorbed during inversion stages. It was found that the energy absorbed by Aluminium tubes were increased by increasing the tube length but decreased with annealing temperature.

Effects of Process Parameters on Elongation during Hot Power Backward Spinning for 7075 Cast Aluminium Alloy Tube

2013 ◽  
Vol 753-755 ◽  
pp. 183-186
Author(s):  
Ran Yang Zhang ◽  
En Le Wang ◽  
Gang Yao Zhao ◽  
Shan Jun Tu ◽  
Zheng Hua Guo
Keyword(s):  
Aluminium Alloy ◽  
Process Parameters ◽  
Feed Rate ◽  
Fe Analysis ◽  
Cast Aluminium ◽  
Alloy Tube ◽  
Preheating Temperature

To obtain the effects of parameters on elongation of 7075 cast aluminium alloy tube in hot power backward spinning accurately, a method to accurately describe the elongation of the spun tube has been proposed. Combined with the FE analysis, the change regularities of elongation with the variation of process parameters were obtained. The results show that the elongation of the spun tube increases gradually with the increase of preheating temperature, and the trend becomes larger and larger. The elongation sharply decreases firstly, and then tends to a stable value with the increase of roller feed rate. With the increase of roller fillets radius, the elongation increases gradually, but the trend becomes weaker.

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