Development of irradiation strategies for 3D-laser forming

Hennige, T.

doi:10.1016/s0924-0136(00)00392-7

Cited by 90 publications

(39 citation statements)

References 3 publications

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“…At high power, thermally altered zone can be coarse as a result of the partial melting or local overheating of the irradiated surface, which can affect the surface morphology of the workpiece. Under these process conditions, upset mechanism (UM) can take place together with buckling mechanism (BM) in agreement with the experimental findings in [8]. Concurrent forming by UM and BM can affect the accuracy and size of the fillet radii.…”

Section: Analysis Of the Bending Mechanismssupporting

confidence: 87%

Laser-Assisted Bending of Sharp Angles With Small Fillet Radius on Stainless Steel Sheets: Analysis of Experimental Set-Up and Processing Parameters

Gisario¹,

Barletta²,

Venettacci³

et al. 2015

Lasers Manuf. Mater. Process.

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Achievement of sharp bending angles with small fillet radius on stainless steel sheets by mechanical bending requires sophisticated bending device and troublesome operational procedures, which can involve expensive molds, huge presses and large loads. In addition, springback is always difficult to control, thus often leading to final parts with limited precision and accuracy. In contrast, laser-assisted bending of metals is an emerging technology, as it often allows toperform difficult and multifaceted manufacturing tasks with relatively small efforts. In the present work, laser-assisted bending of stainless steel sheets to achieve sharp angles is thus investigated. First, bending trials were performed by combining laser irradiation with an auxiliary bending device triggered by a pneumatic actuator and based on kinematic of deformable quadrilaterals. Second, laser operational parameters, that is, scanning speed, power and number of passes, were varied to identify the most suitable processing settings. Bending angles and fillet radii were measured by coordinate measurement machine. Experimental data were elaborated by combined ANalysis Of Mean (ANOM) and ANalysis Of VAriance (ANOVA). Based on experimental findings, the best strategy to achieve an aircraft prototype from a stainless steel sheet was designed and implemented

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Section: Analysis Of the Bending Mechanismssupporting

confidence: 87%

Laser-Assisted Bending of Sharp Angles With Small Fillet Radius on Stainless Steel Sheets: Analysis of Experimental Set-Up and Processing Parameters

Gisario¹,

Barletta²,

Venettacci³

et al. 2015

Lasers Manuf. Mater. Process.

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show abstract

“…Comparison of fitness function effects on GAs optimization results (fitness functions 1 and 2 are specified by Eqs. (9) and (10)). where a i and b i are the range of the ith decision variable.…”

Section: Overall Strategy Of Process Synthesis Of Laser Formingmentioning

confidence: 94%

“…It also experienced difficulty when experimental validation of the result was attempted. Hennige [9] and Magee et al [10] experimentally investigated the scanning patterns for spherical shapes. Based on prior knowledge of the laser forming process, radial and concentric scanning paths were postulated and tested.…”

Section: Introductionmentioning

confidence: 99%

Process synthesis of laser forming by genetic algorithm

Cheng

Yao

2004

International Journal of Machine Tools and Manufacture

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“…the instruction of the processor. Indeed, as evidenced in [27], the spherical cap shape can be also manufactured using an opportune superimposition of circular and radial paths. A correct definition of the irradiation strategy, to be used for the evaluation of the reference patches, results very important for the definition of an optimal process planning.…”

Section: Process Synthesismentioning

confidence: 99%

Inverse analysis of the laser forming process by computational modelling and methods

Carlone

Palazzo

Pasquino

2008

Computers & Mathematics with Applications

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This paper deals with the development of a computational procedure for the inverse analysis of the laser forming process of three-dimensional metal sheet, characterized by double curvature. The procedure is based on the minimization of a vectorial fitness function, obtained by the comparison of the considered target surface with reference deformed surfaces, represented as sixteen point bicubic patches. An FEM-based computational approach has been adopted to evaluate the reference deformed surfaces for the instruction of the processor

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Development of irradiation strategies for 3D-laser forming

Cited by 90 publications

References 3 publications

Laser-Assisted Bending of Sharp Angles With Small Fillet Radius on Stainless Steel Sheets: Analysis of Experimental Set-Up and Processing Parameters

Laser-Assisted Bending of Sharp Angles With Small Fillet Radius on Stainless Steel Sheets: Analysis of Experimental Set-Up and Processing Parameters

Process synthesis of laser forming by genetic algorithm

Inverse analysis of the laser forming process by computational modelling and methods

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