An online surface height measurement method for GTAW-based additive manufacturing

被引：14
作者：
Wang, Xiaolong [1 ]
Wang, Aimin [1 ]
Li, Yuebo [1 ]
机构：
[1] Beijing Inst Technol, Sch Mech Engn, Beijing 100081, Peoples R China
来源：
WELDING IN THE WORLD | 2020年 / 64卷 / 01期
关键词：
Online measurement model; Additive manufacturing; GTAW; Arc length sensing; WIRE; VISION; SYSTEM; COMPONENTS; STRATEGY; MODEL;
D O I：
10.1007/s40194-019-00813-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Wire and arc additive manufacturing (WAAM) process control is critical to forming dimensional accuracy. The online surface height measurement technology is one of the key technologies to achieve closed-loop control of the WAAM surface height. Measurement equipment such as charge-coupled device (CCD) or infrared cameras have difficulties in meeting the requirements for high-frequency online layer height measurement of multi-directional complex paths. In this paper, an online surface height measurement model (OSHMM) based on welding current, voltage, arc length signal, and motion system height displacement data is proposed that can measure the height value of the surface just below the tungsten electrode. The influence of large surface height deviation and the change of wire-feed rate, corner, and inclined edge on measurement accuracy were analysed. The experimental results show that the proposed method can guarantee the accuracy of +/- 1.5 mm in the above cases.
引用
收藏
页码：11 / 20
页数：10
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