激光拼焊错边产生与预测建模方法

Misalignment production and its prediction model in tailored blank laser welding

错边是评定激光拼焊质量的一个非常重要的指标,薄板构件错边的控制是激光拼焊中一个难题。针对国内首条全自动激光拼焊设备,对错边的产生以及控制方法进行了深入研究,经过大量试验确定了影响错边大小的几个主要因素,板材自身物理变形、压紧力大小与均匀性、压紧横梁变形、支撑底板平面度误差以及焊接变形的影响。通过分析以上因素对错边的影响以及各个因素之间相互关系,建立了错边预测的数学模型。试验验证了模型的正确性,从而为确定错边产生原因,提高焊接质量提供了一个有效的理论指导。

Misalignment is an important quality evaluation standard in tailor welded blanks. The control of misalignment, especially for thinner blanks, is a difficult problem in tailored blank laser welding process. The production and control of misalignment is studied based on a tailored blank laser welding system. The influential factors of the misalignment are obtained after numbers of experiments: the deformation of the blanks before welding, the intensity of the clamping force, the uniformity of the clamping force, deformation of the clamping beam, flatness error of the based platform and the welding process. A mathematical model is established according to the analysis of misalignment. Experimental results indicate that the model provides an effective theorical guidance in improving welding quality.