中国激光, 2018, 45 (3): 0302007, 网络出版: 2018-03-20
变壁厚偏心圆环结构激光熔覆成形及闭环控制 下载: 990次
Laser Cladding Forming and Closed-Loop Control of Thickness-Variable Eccentric Ring Structure
激光技术 激光熔覆成形 变壁厚结构 偏心圆环 闭环控制 比例积分控制器 laser technique laser cladding forming thickness-variable structure eccentric ring closed-loop control proportional plus integral controller
摘要
基于光内送粉技术,激光熔覆成形了变壁厚偏心圆环结构。规划了变壁厚偏心圆环的成形扫描路径,利用基于机器视觉的层高控制软件获得了每个成形段的实际高度,并与设定的期望高度进行对比,建立了基于比例积分(PI)控制器的速度校正模型。成形的偏心圆环结构的最小壁厚为2.14 mm,最大为6.38 mm。每段总堆高与期望总堆高的误差较小,整体高度相对平整,具备较高的成形精度。成形件不同壁厚处的晶粒组织均匀致密,晶粒尺寸接近。
Abstract
Basded on the hollow laser beam internal powder feeding technology, the thickness-variable eccentric ring structure is fabricated by laser cladding forming. The scanning paths for forming the thickness-variable eccentric ring structures are planned. The layer-height control software based on machine vision is used to obtain the actual height for the each forming layer, which is compared with the desired height. The speed-correction model based on the proportion-integration (PI) controller is established. The forming eccentric ring structure has the minimum wall thickness of 2.14 mm and the maximum wall thickness of 6.38 mm. The error of actual total height with respect to the desired one of each segment is relatively small and the overall height is relatively flat, which shows the forming accuracy is high. At positions with different wall thicknesses of forming parts, the grain structure is uniform and grain size is comparable.
沈婷, 石拓, 傅戈雁, 张锐, 胡晔. 变壁厚偏心圆环结构激光熔覆成形及闭环控制[J]. 中国激光, 2018, 45(3): 0302007. Shen Ting, Shi Tuo, Fu Geyan, Zhang Rui, Hu Ye. Laser Cladding Forming and Closed-Loop Control of Thickness-Variable Eccentric Ring Structure[J]. Chinese Journal of Lasers, 2018, 45(3): 0302007.