A new approach in producing metal bellows by local arc heating: a parametric study

Sedighi, M.; Shamsi, M.

doi:10.1007/s00170-017-0768-1

Cited by 12 publications

(2 citation statements)

References 18 publications

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“…Zhang et al [20] manufactured the aluminum alloy bellows, confirming that the semi-dieless metal bellow forming process is applicable to materials with high thermal conductive coefficients. Sedighi et al [21] produced metal bellows with local electric arc heating and axial compression. The influence of compression stroke and working current on the forming force, the convolution height, as well as the wall thickness, were investigated.…”

Section: Introductionmentioning

confidence: 99%

Local Buckling-Induced Forming Method to Produce Metal Bellows

Zhang

Li²,

et al. 2023

Chin. J. Mech. Eng.

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A novel buckling-induced forming method is proposed to produce metal bellows. The tube billet is firstly treated by local heating and cooling, and the axial loading is applied on both ends of the tube, then the buckling occurs at the designated position and forms a convolution. In this paper, a forming apparatus is designed and developed to produce both discontinuous and continuous bellows of 304 stainless steel, and their characteristics are discussed respectively. Furthermore, the influences of process parameters and geometric parameters on the final convolution profile are deeply studied based on FEM analysis. The results suggest that the steel bellows fabricated by the presented buckling-induced forming method have a uniform shape and no obvious reduction of wall thickness. Meanwhile, the forming force required in the process is quite small.

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Section: Introductionmentioning

confidence: 99%

Local Buckling-Induced Forming Method to Produce Metal Bellows

Zhang

Li²,

et al. 2023

Chin. J. Mech. Eng.

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show abstract

“…19 Sedighi and Shamsi proposed a process of preparing metal bellows by using local arc heating and axial compression. 20 The bellows were formed by controlling parameters such as axial displacement and current, and SUS304 stainless steel bellows were successfully obtained. Talebi-Anaraki et al studied the effect of pulsating pressure on hot tube gas forming by the method of oscillating heating.…”

Section: Introductionmentioning

confidence: 99%

Plastic wrinkling of thin-walled tubes under axial compression in non-uniform temperature field

Cui

Guo

Wen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The main purpose of this paper is to reveal the wrinkling behavior of thin-walled tubes under axial compression in a non-uniform temperature field formed by induction heating on a local position. The distribution of non-uniform temperature fields induced by induction heating and the wrinkling behavior of tubes under axial compression were studied by combining experiments and simulations. Moreover, the thickness and hardness distribution of the wrinkled tube were analyzed. The results show that the maximum temperature difference along axial direction of 5052 aluminum alloy and AZ31B magnesium alloy tubes can reach 129.1°C and 134.7°C in experiments, respectively. In the non-uniform temperature field with a maximum temperature of 250°C, axisymmetric wrinkles can be formed under axial compression on the tubes. With the increase of axial compression, the wrinkle width gradually decreases and its height gradually increases. The contour shape of wrinkles can be fitted accurately with GaussAmp function. There is an obvious thickening phenomenon on the wrinkles and the thickest point is located on the wrinkle top, where the thickness gradually increases with increasing the axial compression. In addition, the microhardness at the wrinkles is lower than that of the original tubes. It decreases with the increase in axial compression. The maximum reduction of microhardness of 5052 aluminum alloy and AZ31B magnesium alloy tubes at the wrinkles are 41.6% and 17%, respectively. This study not only can provide tube blank with useful wrinkles for hydroforming, but also can provide experimental data for establishing buckling theory of inhomogeneous tube shells.

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Flexible Tube Die-Less Forming

Tao

Guo

et al. 2022

Springer Tracts in Mechanical Engineering

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A new approach in producing metal bellows by local arc heating: a parametric study

Cited by 12 publications

References 18 publications

Local Buckling-Induced Forming Method to Produce Metal Bellows

Local Buckling-Induced Forming Method to Produce Metal Bellows

Plastic wrinkling of thin-walled tubes under axial compression in non-uniform temperature field

Flexible Tube Die-Less Forming

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