Laser forming: overview of the controlling factors in the temperature gradient mechanism

Edwardson, Stuart and Griffiths, Jonathan David and Edwards, Kenneth and Dearden, Geoff and Watkins, Ken (2010) Laser forming: overview of the controlling factors in the temperature gradient mechanism. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 224 (5). pp. 1031-1040. ISSN 0954-4062

Full content URL: http://dx.doi.org/10.1243/09544062JMES1776

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Item Type:Article
Item Status:Live Archive

Abstract

Laser forming (LF) offers the industrial promise of controlled shaping of metallic and non-metallic components for prototyping, the correction of design shape or distortion, and precision adjustment applications. The potential process advantages include precise incremental adjustment, flexibility of application, and no mechanical ‘spring-back’ effect. To date, there has been a considerable amount of work carried out on two-dimensional LF, using multi-pass straight-line scan strategies to produce a reasonably controlled bend angle in a number of materials, including aerospace alloys. A key area, however, where there is a limited understanding, is the variation in the bend angle per pass during multi-pass temperature gradient mechanism-based LF along a single irradiation track, in particular, the decrease in the bend angle per pass after many irradiations for a given set of process parameters. Understanding this is essential if the process is to be fully controlled for a manufacturing environment. The research presented in this paper through empirical data and numerical simulation of the LF of sheet mild steel, Ti6Al4V and AA5251, by CO2 laser offers a novel coherent picture of the key influencing factors and at which point in the bend evolution each is dominant, which has not been presented before.

Keywords:laser forming, bending, temperature gradient mechanism
Subjects:H Engineering > H100 General Engineering
Divisions:College of Science > School of Engineering
ID Code:11248
Deposited On:16 Jul 2013 13:18

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