Sensing and control system of process quality in CO2 laser deep penetration welding

被引：10

作者：

Chen, WZ ^{[1
]}

Zhang, XD ^{[1
]}

Bao, JC ^{[1
]}

Wang, Y ^{[1
]}

Li, TY ^{[1
]}

Jiang, P ^{[1
]}

Zhang, HJ ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Engn Mech, Laser Proc Res Ctr, Beijing 100084, Peoples R China

来源：

LASER PROCESSING OF MATERIALS AND INDUSTRIAL APPLICATIONS II | 1998年 / 3550卷

关键词：

laser beam welding; plasma; optimization of focal point position; closed-loop control;

D O I：

10.1117/12.317899

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A sensing and control system of process quality in CO2 laser deep penetration welding has been developed, including plasma photo sensor (PS) and plasma charge sensor (PCS), signal processing circuit, personal computer, and optimization and control software. By using the information of plasma radiation and plasma charge, the focusing lens is adjusted to the optimum focal point position (at which the maximum penetration can be achieved) and closed-loop control is realized to assure the focal point position and penetration depth constant. In laser welding of the workpiece aslant placed with larger angle, the variation of focal point position is less than 0.2mm and the fluctuation of penetration depth is less than 0.05mm. The control system has been preliminarily applied in laser precision welding of 2.5m long zircaloy fuel channel used in nuclear heat-supply reactor.

引用

页码：287 / 297

页数：11