Feedback control for 2D free curve laser forming

Kim, Ji-Tae; Na, S.J.

doi:10.1016/j.optlastec.2004.03.001

Cited by 22 publications

(10 citation statements)

References 16 publications

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“…Later, they adopted recalculation methods for better accuracy. 17 Liu et al 18 presented an optimal approach to determine the laser scanning paths and heating conditions for laser forming of doubly curved shapes. Ojeda and Grez 19 worked on stepped scanning patterns to get higher degree of bend angle.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets

Kant

Joshi

2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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Laser bending is an innovative technique to obtain the required bend-angle and sheet metal curvature by means of laser beam irradiation with controlled laser parameters. In this work, a numerical investigation on curvilinear laser bending of magnesium M1A aoy sheets has been carried out. Three-dimensional sequential transient thermomechanical numerical model is developed by using finite element method. The model has been validated by comparing the predicted results with those obtained in the experiments. The curvilinear laser bending process is studied in terms of temperature distribution, stress-strain distribution, bend angle and displacement at the edges. The results showed that the bend angle increases with increase in scanning path curvature. It is observed that the displacement at various edges and final shape of the worksheet are affected by the scanning path curvature. The results will be useful in adjustment and alignment processes and the generation of complex shapes using lasers.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets

Kant

Joshi

2013

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…To produce more complex objects via laser forming, it is necessary to know which bend lines are needed to produce a given shape, a classic origami problem [1]. To this end, the inverse design of scan strategies to generate a desired laser formed structure has been a productive research topic [53,66,84,99,[148][149][150][151]. The design of irradiation paths involves more than planning where the beam needs to be applied to generate a desired shape, but also the laser power and travel speed, to produce the desired degree of bending using the appropriate forming mechanism.…”

Section: Laser Forming For Rapid Prototypingmentioning

confidence: 99%

Making Light Work of Metal Bending: Laser Forming in Rapid Prototyping

Bachmann

Dickey

Lazarus

2020

QuBS

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Lasers can be used to bend 2D metal sheets into complex 3D objects in a process called ‘laser forming.’ Laser forming bends metal sheets by locally heating the sheets to generate plastic strains and is an established metal bending technology in the shipbuilding industry. Recent studies have investigated the laser forming of thin metal parts as a complementary rapid prototyping technology to metal 3D printing. This review discusses the laser forming process, beginning with the mechanisms before covering various design considerations. Laser forming for the rapid manufacturing of metal parts is then reviewed, including the recent advances in process planning, before highlighting promising future research directions.

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“…This ''feedback-control-approach'' uses the forming result of the previous laser path to determine the process parameters for the following [16]. To minimize the data transfer, especially for large structures, the geometry of the specimen is computed from single defined points on the surface [17].…”

Section: Process Implementationmentioning

confidence: 99%

Development of a robust laser beam bending process for aluminum fuselage structures

Zaeh

Hornfeck

2008

Prod. Eng. Res. Devel.

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The aeronautic industry has to face the demand of cost reduction by its customers. These costs are divided into acquisition and operating costs. Both can be reduced by optimization and automation of production steps and by using highly integrated light weight structures. Within the EU-founded FP 6 project ECOSHAPE a laser beam forming (LBF) process for the laser beam bending of complex fuselage aluminum panels has been developed. The aim was to build up the fundamental know-how for an industrial manufacturing process performing most production steps in flat condition due to a minimum of machining costs, technological complexity and a maximum of robustness and reliability. To facilitate the cost intensive qualification of the LBF-process the metallurgical behavior of the aluminum alloys is investigated as well as the influences of the single structural elements of the fuselage panels like stingers and pockets on the forming result. For the industrial upgrade the process is integrated into a discrete control loop using the geometry of the panel as control variable.

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Feedback control for 2D free curve laser forming

Cited by 22 publications

References 16 publications

Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets

Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets

Making Light Work of Metal Bending: Laser Forming in Rapid Prototyping

Development of a robust laser beam bending process for aluminum fuselage structures

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