Iterative 3D laser forming of continuous surfaces
Iterative 3D laser forming of continuous surfaces
复制标题
连续表面的迭代 3D 激光成型
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
K. Watkins
中科院分区：
文献类型：
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作者：
S. Edwardson;A. Moore;E. Abed;R. McBride;P. French;D. Hand;G. Dearden;J. Jones;K. Watkins
在二维激光成形方面已经开展了大量的工作，使用多道次直线扫描策略在包括航空航天合金在内的许多材料中产生合理控制的弯曲角度。然而，为了进一步推动该工艺在实际成形应用中的应用以及制造业中的矫直和对准操作，有必要考虑更大规模的受控3D激光成形。本文提出了一种预测和自适应的方法来控制1.5 mm低碳钢薄板的三维激光成形成所需的连续表面。研究中考虑的表面是枕头(或圆顶)形状。控制这一过程的关键是开发预测模型，以根据所需的几何形状提供扫描策略。当几何图形未在一次扫描中形成时，增量自适应方法用于后续扫描，利用当前几何图形和所需几何图形之间的误差给出新的扫描策略，因此可以考虑材料变化引起的任何不必要的失真。成形速度和表面成形大小的分布由工艺速度控制。在二维激光成形方面已经开展了大量的工作，使用多道次直线扫描策略在包括航空航天合金在内的许多材料中产生合理控制的弯曲角。然而，为了进一步推动该工艺在实际成形应用中的应用以及制造业中的矫直和对准操作，有必要考虑更大规模的受控3D激光成形。本文提出了一种预测和自适应的方法来控制1.5 mm低碳钢薄板的三维激光成形成所需的连续表面。研究中考虑的表面是枕头(或圆顶)形状。控制这一过程的关键是开发预测模型，以根据所需的几何形状提供扫描策略。当几何图形不是在一个通道内形成时，增量自适应方法被用于后续通道，利用当前几何图形和所需几何图形之间的误差来给出新的SCA。
There has been a considerable amount of work carried out on two-dimensional laser forming, using multi-pass straight line scan strategies to produce a reasonably controlled bend angle in a number of materials, including aerospace alloys. However in order to advance the process further for realistic forming applications and for straightening and aligning operations in a manufacturing industry it is necessary to consider larger scale controlled 3D laser forming. The work presented in this paper uses a predictive and adaptive approach to control the 3D laser forming of 1.5mm Mild Steel sheet into a desired continuous surface. The surface considered in the study was the pillow (or dome) shape. Key to the control of the process was the development of a predictive model to give scan strategies based on a required geometry. When the geometry is not formed within one pass, an incremental adaptive approach is used for subsequent passes, utilising the error between the current and desired geometry to give a new scan strategy, thus any unwanted distortion due to material variability can be accounted for. The forming rate and distribution of the magnitude of forming across the surface were controlled by the process speedThere has been a considerable amount of work carried out on two-dimensional laser forming, using multi-pass straight line scan strategies to produce a reasonably controlled bend angle in a number of materials, including aerospace alloys. However in order to advance the process further for realistic forming applications and for straightening and aligning operations in a manufacturing industry it is necessary to consider larger scale controlled 3D laser forming. The work presented in this paper uses a predictive and adaptive approach to control the 3D laser forming of 1.5mm Mild Steel sheet into a desired continuous surface. The surface considered in the study was the pillow (or dome) shape. Key to the control of the process was the development of a predictive model to give scan strategies based on a required geometry. When the geometry is not formed within one pass, an incremental adaptive approach is used for subsequent passes, utilising the error between the current and desired geometry to give a new sca...