Study on Shape and Size Precision Control of Titanium Alloy in Laser Bending

Chang, 刘畅 Liu; Shunhong, 刘顺洪 Liu; Jialiang, 柳家良 Liu; Kaipeng, 胡凯鹏 Hu; Pan, 肖攀 Xiao

doi:10.3788/al20113101.0050

应用激光

2011

DOI: 10.3788/al20113101.0050

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Study on Shape and Size Precision Control of Titanium Alloy in Laser Bending

刘畅 Liu Chang¹,

刘顺洪 Liu Shunhong²,

柳家良 Liu Jialiang³

et al.

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Study of laser bending of a preloaded Titanium alloy sheet

Wang

et al. 2014

Manufacturing Rev.

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Laser bending of sheet metals with preload offers some attractive characteristics/merits, comparing to laser free bending without prestressing on the metals. The study reported in this paper was focused on a Titanium alloy which finds widespread applications in aerospace manufacturing. FE simulation of laser bending with prestressing on the Titanium alloy sheet was conducted for the analysis of the bending process and experiment carried out to verify the model and the result. It was shown that the simulation result is close to that measured in the experiment. Based on the computed result, the load-displacement curve was analysed and transmission efficiency of the elastic energy defined to evaluate the bending effect. These enhanced understanding of the mechanism of laser bending with a preload. A method for the optimization on technological parameters was further proposed. Referring to the deformation targeted, the preload value was determined through the FE simulation. The result showed that, on the premise that the specimen surface can be prevented from damaging, transmission efficiency of the elastic energy could reach to the maximum value through adjusting technological parameters of the laser system and deformation accuracy of the specimen could also be improved through this approach. The work presented in this paper may find its application in the manufacture of Titanium alloy sheets with a more cost-effective and a more precise way.

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Study of laser bending of a preloaded Titanium alloy sheet

Wang

et al. 2014

Manufacturing Rev.

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Effects of Laser Scanning Strategy on Bending Behavior and Microstructure of DP980 Steel

Dong,

Zhang,

Bao

et al. 2024

Materials

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Laser bending is a kind of cumulative forming technology and bending efficiency is one of its most important indexes. This study investigates the bending behavior and the microstructure of DP980 steel plates under different laser scanning strategies, using an IPG laser system. Two sets of experiments varied the accumulated line energy density (AED) by altering the laser scanning velocity and number of scans. The results show that, for the single laser scanning process, the bending angle of the plate increases with AED, due to a larger temperature gradient through the thickness direction; however, this relationship is nonlinear. A higher AED led to a sharper initial increase in bending angle, which then plateaued. Under the same AED conditions, the bending angle of the plate undergoing multiple laser scans increases by at least 26% compared to the single one, due to the microstructure changes. It is revealed that the bending efficiency is affected by both the AED and the resultant microstructure evolution in the DP980 steel. Higher AED values and appropriate peak temperatures facilitate better bending behavior due to the formation of uniform martensite and grain refinement. Conversely, excessive peak temperatures can hinder bending due to grain growth.

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Study on Shape and Size Precision Control of Titanium Alloy in Laser Bending

Cited by 2 publications

References 0 publications

Study of laser bending of a preloaded Titanium alloy sheet

Study of laser bending of a preloaded Titanium alloy sheet

Effects of Laser Scanning Strategy on Bending Behavior and Microstructure of DP980 Steel

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