Laser Forming Techniques in Sheet Metal Fabrication

Laser forming is a die-free sheet metal bending process that relies on a focused laser beam to induce controlled plastic deformation. By traversing a laser over a metal surface, steep temperature gradients generate localised expansion and contraction, which in turn produces bending via mechanisms such as the temperature gradient mechanism (TGM), buckling and upsetting. Key process parameters include laser power, scanning speed, beam diameter, hatch spacing and the chosen scanning path. Numerical and analytical models, often based on coupled thermomechanical finite-element methods, predict bending angles and stress distributions, while data-driven approaches refine parameter optimisation. Laser forming can produce simple bends, tubes and complex doubly curved components without physical tooling, reducing springback and material thinning. It is employed in aerospace, automotive and shipbuilding sectors, and increasingly in rapid prototyping alongside additive manufacturing. Advances in in situ monitoring and hybrid processes—such as magnetically assisted bending—further enhance precision. Global research efforts interweave modelling, experimental validation and machine-learning prediction to extend laser forming from single-layer sheets to multilayer composites, optimise energy efficiency and open pathways to customised, low-volume production.

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Laser Forming Techniques in Sheet Metal Fabrication publication trend

The graph below shows the total number of articles in laser forming techniques in sheet metal fabrication across all publications each year (not limited to Nature Index journals).

Technical terms

Laser forming: Contactless bending of sheet metal induced by localised heating and subsequent cooling.

Temperature gradient mechanism (TGM): Plastic deformation caused by asymmetric thermal expansion across a heated track.

Scanning path: The predefined trajectory of the laser beam over the workpiece surface.

Irradiation scheme: Pattern of laser movement, such as circular, axial or spiral scans, that determines heat distribution.

Support vector regression (SVR): A supervised machine-learning method for predicting continuous outcomes from process parameters.

References

1. Recent Advances in the Laser Forming Process: A Review. Metals (2020).
2. Making Light Work of Metal Bending: Laser Forming in Rapid Prototyping. Quantum Beam Science (2020).
3. Developing a Support Vector Regression (SVR) Model for Prediction of Main and Lateral Bending Angles in Laser Tube Bending Process. Materials (2023).
4. Numerical Simulation and Experimental Validation of Sheet Laser Forming Processes Using General Scanning Paths. Materials (2018).
5. Experimental Investigation of the Effects of Irradiating Schemes in Laser Tube Bending Process. Metals (2021).
6. Laser‐assisted bending by magnetic force. The Journal of Engineering (2017).
7. In Situ Digital Image Correlation Observations of Laser Forming. Metals (2019).