Groove sidewall penetration modeling for rotating arc narrow gap MAG welding

The metal transfer process with different welding parameters in rotating arc narrow gap horizontal welding is successfully observed by the high-speed photography system. The effects of wire rotating frequency on metal transfer process in rotating arc narrow gap horizontal welding are novelly explored. The metal transfer with different wire rotating frequency presents different modes. The results indicate that the droplet transfer has stable process with the rotating frequency of 5-20 Hz. And the weld formation is quite shapely. But with the high rotating frequency of 50 Hz, the metal transfer process is not acceptable and the weld formation is very pool. Metal transfer process is one of the most important factors of effecting the weld formation in rotating arc horizontal welding process besides the molten pool behavior and welding thermal circles.

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Correlation of Arc Sound and Arc-sidewall Position in Narrow Gap MAG Welding

Journal of Mechanical Engineering ◽

10.3901/jme.2014.24.038 ◽

2014 ◽

Vol 50 (24) ◽

pp. 38 ◽

Cited By ~ 2

Author(s):

Hu LAN

Keyword(s):

Mag Welding ◽

Narrow Gap ◽

Arc Sound

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A Digital Control for Swinging Arc Narrow Gap MAG Welding System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.468.127 ◽

2013 ◽

Vol 468 ◽

pp. 127-133

Author(s):

Jie Zhu ◽

Wei Qiong Xiong ◽

Wei Hua Zhang ◽

Wen Hang Li ◽

Jia You Wang

Keyword(s):

Control System ◽

Digital Control ◽

Welding Process ◽

Mag Welding ◽

Narrow Gap ◽

Single Chip ◽

Single Chip Microcomputer ◽

Control Functions ◽

Welding System ◽

Exchange Data

This paper presents a digital control system for swinging arc narrow gap MAG welding based on double single-chip microcomputers. The control system utilizes a single-chip microcomputer to set and display welding process parameters, and then uses another single-chip microcomputer to realize the control functions that are necessary for the swing arc process, in which the two single-chip microcomputers can exchange data through asynchronous serial communication circuit. Experimental results show that the control system works stably and reliably with strong anti-interference capabilities, and can completely satisfy the requirements of swinging arc narrow gap welding process.

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Study on one-side narrow-gap MAG welding. Rept. I. Observation of "Uranami bead" shapes in DC electrode negative polarity.

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY ◽

10.2207/qjjws.3.261 ◽

1985 ◽

Vol 3 (2) ◽

pp. 261-269 ◽

Cited By ~ 1

Author(s):

Hidehiko Ono

Keyword(s):

Negative Polarity ◽

Mag Welding ◽

Narrow Gap

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A modified welding image feature extraction algorithm for rotating arc narrow gap MAG welding

Industrial Robot the international journal of robotics research and application ◽

10.1108/ir-11-2014-0407 ◽

2015 ◽

Vol 42 (3) ◽

pp. 222-227 ◽

Cited By ~ 7

Author(s):

Wenhang Li ◽

Yunhong Ji ◽

Jing Wu ◽

Jiayou Wang

Keyword(s):

Feature Extraction ◽

Extraction Method ◽

Image Feature ◽

Mag Welding ◽

Narrow Gap ◽

Image Feature Extraction ◽

Content Type ◽

Feature Extraction Method ◽

Extraction Algorithm ◽

Welding Image

Purpose The purpose of this paper is to provide a modified welding image feature extraction algorithm for rotating arc narrow gap metal active-gas welding (MAG) welding, which is significant for improving the accuracy and reliability of the welding process. Design/methodology/approach An infrared charge-coupled device (CCD) camera was utilized to obtain the welding image by passive vision. The left/right arc position was used as a triggering signal to capture the image when the arc is approaching left/right sidewall. Comparing with the conventional method, the authors’ sidewall detection method reduces the interference from arc; the median filter removes the welding spatter; and the size of the arc area was verified to reduce the reflection from welding pool. In addition, the frame loss was also considered in the authors’ method. Findings The modified welding image feature extraction method improves the accuracy and reliability of sidewall edge and arc position detection. Practical implications The algorithm can be applied to welding seam tracking and penetration control in rotating or swing arc narrow gap welding. Originality/value The modified welding image feature extraction method is robust to typical interference and, thus, can improve the accuracy and reliability of the detection of sidewall edge and arc position.

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