A plasma cloud charge sensor for pulse keyhole process control
A plasma cloud charge sensor for pulse keyhole process control
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DOI：
10.1088/0957-0233/12/8/352
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发表时间：
2001-08
影响因子：
2.4
通讯作者：
Yuming Zhang;S. B. Zhang;Y. C. Liu
中科院分区：
文献类型：
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作者：
Yuming Zhang;S. B. Zhang;Y. C. Liu
小孔等离子弧焊比所有其他现有的弧焊工艺实现了更深的熔深。由于其能够穿透较厚的材料，等离子弧焊中小孔的控制变得至关重要。从物理过程的分析出发，提出并开发了一种检测锁孔状态的传感器，用于锁孔过程控制。该传感器测量小孔等离子弧焊过程中产生的等离子云的电效应。研究发现，在完全穿透的钥匙孔建立后，等离子体云迅速减少到零，可用于可靠地检测钥匙孔的状态。所提出的传感器检测小孔状态的有效性已在脉冲小孔等离子弧焊过程中得到验证。
Keyhole plasma arc welding achieves much deeper penetration than do all other existing arc welding processes. Because of its ability to penetrate thicker material, the control of the keyhole in plasma arc welding becomes critical. From an analysis of the physical process, a sensor to detect the state of the keyhole for keyhole process control has been proposed and developed. This sensor measures the electrical effect of the plasma cloud generated during keyhole plasma arc welding. It is found that the plasma cloud, which rapidly decreases to zero upon establishment of the fully penetrated keyhole, can be used to detect the state of the keyhole reliably. The effectiveness of the proposed sensor for detecting the keyhole state has been verified during pulse keyhole plasma arc welding.