【摘要】 针对如何在光滑的铝合金表面得到高质量的激光直接标记Data Matrix(DM)条码的问题,以YAG-T80C固体调Q激光器在6 061铝合金表面标刻的DM二维条码为研究对象。分析了电流强度、扫描速度这两个加工参数对条码表面粗糙度的作用机理,通过实验研究了电流强度,扫描速度对激光直接标记DM条码标记区域表面粗糙度的影响规律,发现了DM条码粗糙度会影响条码标记区域外观颜色的变化并且与条码的质量等级存在一定的对应关系。研究结果表明,增大电流强度或降低扫描速度能提高条码标记区域的表面粗糙度;随着条码标记区域表面粗糙度的增加,DM条码激光标记区域的外观颜色逐渐由白变灰再变黑;B等级DM条码表面粗糙度在14.25μm~24.32μm的范围内,C等级DM条码的表面粗糙度在4.53μm~15.15μm范围内,D等级DM条码表面粗糙度在2.98μm~6.08μm的范围内,提高条码标记区域表面粗糙度,有利于提高条码等级便于条码的识别。更多还原

【Abstract】 Aiming at obtaining high-quality laser direct marking Data Matrix( DM) barcodes on aluminum alloy surface,several single-factor experiments were carried out on 6 061 aluminum alloy sheets used a YAG-T80C laser. The action principle of processing parameters( current intensity,laser scanning speed) with the surface roughness of DM barcodes was analyzed. Based on the experimental results,the effects of current intensity and laser scanning speed on the barcodes’ surface roughness were studied,the relationship between the surface roughness and the color and final grades of the DM barcodes was discovered. The results indicate that the laser processing parameters have significant effects on the processing quality of the data matrix symbols. Larger current intensity or slower laser scanning speed can produce a higher value of surface roughness. With the increase of DM barcodes’ surface roughness,the color of barcodes appears from white to dark. In addition,there is a certain relationship between surface roughness and the final grades of the data matrix barcodes. Those barcodes with higher surface roughness get higher quality grades and be identified more easily.更多还原