Progress and Trend in Intelligent Sensing and Control of Weld Pool in Arc Welding Process

2019 ◽  
pp. 27-43 ◽  
Author(s):  
Ding Fan ◽  
Gang Zhang ◽  
Yu Shi ◽  
Ming Zhu
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Welding Process ◽  
Arc Welding Process ◽  
And Control

scholarly journals Numerical simulation of weld pool formation in submerged arc welding process

2020 ◽  
Vol 38 (4) ◽  
pp. 355-362
Author(s):  
Yosuke OGINO ◽  
Masahiro IIDA ◽  
Satoru ASAI ◽  
Shohei KOZUKI ◽  
Naoya HAYAKAWA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Weld Pool ◽  
Arc Welding ◽  
Welding Process ◽  
Submerged Arc Welding ◽  
Arc Welding Process ◽  
Pool Formation ◽  
Submerged Arc

A novel electrode-arc-weld pool model for studying the keyhole formation in the keyhole plasma arc welding process

2019 ◽  
Vol 52 (16) ◽  
pp. 165203 ◽  
Author(s):  
Dongsheng Wu ◽  
Shinichi Tashiro ◽  
Xueming Hua ◽  
Manabu Tanaka
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Welding Process ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Pool Model ◽  
Arc Welding Process

Sensing and Control of Double-Sided Arc Welding Process

2002 ◽  
Vol 124 (3) ◽  
pp. 695-701 ◽  
Author(s):  
Y. M. Zhang ◽  
S. B. Zhang ◽  
M. Jiang
Keyword(s):  
Arc Welding ◽  
Current Practice ◽  
Welding Process ◽  
Butt Joint ◽  
Large Structures ◽  
Arc Welding Process ◽  
And Control ◽  
Number Of Passes ◽  
Welding Productivity ◽  
Thick Material

The welding industry is driven to improve productivity without sacrificing quality. For thick material welding, the current practice is to use backing or multiple passes. The laser welding process, capable of achieving deep narrow penetration, can significantly improve welding productivity for such applications by reducing the number of passes. However, its competitiveness in comparison with traditional arc welding is weakened by its high cost, strict fit-up requirement, and difficulty in welding large structures. In this work, a different method, referred to as double-sided arc welding (DSAW) is developed to improve the arc concentration for arc welding. A sensing and control system is developed to achieve deep narrow penetration under variations in welding conditions. Experiments verified that the pulsed keyhole DSAW system developed is capable of achieving deep narrow penetration on a 1/2 inch thick square butt joint in a single pass.

scholarly journals A Convenient Unified Model to Display the Mobile Keyhole-Mode Arc Welding Process

2020 ◽  
Vol 10 (22) ◽  
pp. 7955
Author(s):  
Yan Li ◽  
Chen Su ◽  
Ling Wang ◽  
Chuansong Wu
Keyword(s):  
Weld Pool ◽  
Electric Potential ◽  
Arc Welding ◽  
Manufacturing Industry ◽  
Welding Process ◽  
Unified Model ◽  
Computational Time ◽  
Good Prospect ◽  
Plasma Arc ◽  
Arc Welding Process

Keyhole-mode plasma arc welding (PAW) has a good prospect in the manufacturing industry. Unified models of plasma arc and workpiece help to reveal the physical mechanism in PAW for a better application. Previous unified models either deal with a constant keyhole situation or take too much computational time to display the dynamic keyhole process with a two-phase flow method. In view of the convenience for industrial application as well as good accuracy, a convenient unified model was developed to describe the mobile keyhole-mode PAW. With a simplified technique, the multiphase heat and force effect between plasma arc and workpiece was turned into a single-phase problem at each individual domain. Thus, it takes less computational time than previous unified models. The temperature field and weld pool during the mobile keyhole-mode PAW process were revealed, the arc flow and pool flow were displayed and the electric potential was predicted. The experiment was conducted on a stainless-steel plate, and the weld pool image and the measured arc pressure agree well with the calculated result. The calculated electric potential drop also coincides with the experiment. The model provides a convenient and accurate method to display the mobile keyhole-mode arc welding process.

Detection of Weld Pool Width during Strong Arc Disturbance Environment

2012 ◽  
Vol 201-202 ◽  
pp. 379-382
Author(s):  
Liang Zheng Jiang ◽  
Xiang Dong Gao
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Specular Reflection ◽  
Welding Process ◽  
Internal Edge ◽  
External Edge ◽  
Filtering Algorithm ◽  
Light Effects ◽  
Arc Welding Process ◽  
Weld Pool Width

Detecting the weld pool width is prerequisite to control the welding quality. However, in an arc welding process, it is difficult to obtain a clear image of weld pool due to strong arc disturbance. A method is proposed to lessen the arc disturbance and obtain the width of a weld pool. A camera was used to capture the weld pool images during the arc welding process. The frequency domain filter combined with spatial processing algorithms were used to depress the noises in the pool image. During arc welding, the weld pool was in a liquid state and showed specular reflection due to the arc light effects. Because of the specular reflection, edges of the weld pool exhibited different brightness from that of the internal weld pool where a camera hangs. According to this phenomenon, it was easy to recognize the outlines of the internal and external weld pool. After the image noise of the weld pool was eliminated by an image filtering algorithm, then the line scanning on the image was carried out. It was crystal-clear that the external edge and internal edge demonstrate different grey levels. Therefore the method could be utilized to identify and extract the internal weld pool width and external weld pool width.

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