Method of combined control of the process of electrode metal transfer in mechanised arc welding

2006 ◽  
Vol 20 (12) ◽  
pp. 996-1002
Author(s):  
B E Paton ◽  
V A Lebedev ◽  
Ya I Mikitin
Keyword(s):  
Arc Welding ◽  
Metal Transfer ◽  
Combined Control ◽  
Electrode Metal

scholarly journals INFORMATION-MEASURING COMPLEX FOR INVESTIGATION OF MELTING AND ELECTRODE METAL TRANSFER AT ARC WELDING

2020 ◽  
Vol 2020 (6) ◽  
pp. 4-11
Author(s):  
Sergey Bolotov ◽  
Aleksandr Homchenko ◽  
Aleksandr Shul'ga ◽  
Evgeniya Bolotova
Keyword(s):  
Arc Welding ◽  
High Speed ◽  
Video Camera ◽  
Metal Transfer ◽  
Infrared Range ◽  
Cold Metal Transfer ◽  
Optimum Frequency ◽  
Power Characteristics ◽  
Cold Metal ◽  
Electrode Metal

The purpose of the paper consists in the description of the procedure for investigations and software-hardware means for arc welding with a melting electrode in protective gas environment with the controlled transfer of electrode metal and its visualization. For investigations of quick electrode metal transfer processes there was used Evercam 1000-4-C digital video-camera and RKDP-0401recorder of welding mode parameters. For video-control of the process there was used a method of active illumination with the further image filtration. It is determined that the visualization of a welding drop transfer dynamics during arc welding with melting electrode in protective gases should be carried out in the infrared range on one side limited with the curve of a spectral transmission of light filters – 950 nm, and on the other side of a matrix sensitivity spectral curve of a rapid camera -1050 nm. There is developed software in the environment of the LabVIEW graphical programming allowing the fulfillment of adjustment and programming welding mode parameters and high-speed shooting, device synchronization, superposition on oscillograms of electric parameters of the electrode metal image transfer, definition of power characteristics at different interval of drop transfer. The CMT (Cold Metal Transfer) process with the aid of the equipment of Fronius TransPuls Synergic 3200 is investigated. It is defined that for arc welding in protective gases an optimum frequency of video-shooting is 1500-2000 shots per second at resolution from 640x608 pixels to 320x400 pixels that allows analyzing efficiently rapid processes of drop transfer.

Mechanically assisted droplet transfer process in gas metal arc welding

2002 ◽  
Vol 216 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Y Wu ◽  
R Kovacevic
Keyword(s):  
Transfer Process ◽  
Arc Welding ◽  
High Speed ◽  
Gas Metal Arc Welding ◽  
Metal Transfer ◽  
Droplet Transfer ◽  
Macroscopic Appearance ◽  
Transfer Mode ◽  
Metal Arc Welding ◽  
Separate Control

Gas metal arc welding has been generally accepted as the preferred joining technique due to its advantages in high production and automated welding applications. Separate control of arc energy and arc force is an essential way to improve the welding quality and to obtain the projected metal transfer mode. One of the most effective methods for obtaining separate control is to exert an additional force on the metal transfer process. In this paper, the droplet transfer process with additional mechanical force is studied. The welding system is composed of an oscillating wire feeder. The images of molten metal droplets are captured by a high-speed digital camera, and both the macroscopic appearance and the cross-sectional profiles of the weld beads are analysed. It is shown that the droplet transfer process can be significantly improved by wire electrode oscillation, and a projected spray transfer mode can be established at much lower currents. By increasing the oscillation frequency, the droplet transfer rate increases while the droplet size decreases. In addition, the improvement in the droplet transfer process with wire oscillation leads to an enhancement of the surface quality and a modification of the geometry of the weld beads that could be of importance for overlay cladding and rapid prototyping based on deposition by welding.

scholarly journals Analysis of Metal Transfer and Weld Forming Characteristics in Triple-wire Gas Indirect Arc Welding

2021 ◽  
Author(s):  
Liming Liu ◽  
Zeli Wang ◽  
Tianyi Zhang ◽  
Xianli Ba
Keyword(s):  
Electromagnetic Force ◽  
Arc Welding ◽  
Metal Transfer ◽  
Force Model ◽  
High Deposition Rate ◽  
Transfer Mode ◽  
Conductive Channel ◽  
Forming Characteristics ◽  
Metal Transfer Mode ◽  
Indirect Arc

Abstract Triple-wire gas indirect arc welding (TW-GIA) has the advantages of low heat input and high deposition rate. However, the simultaneous melting of triple wires makes the metal transfer mode complicated. The unknown of the metal transfer mode restricts the development of this technology. In this paper, high-speed camera systems and electrical signal acquisition sensors were used to explore the TW-GIA metal transfer mode. The static force model and the arc conductive channel model were used to discuss the droplet force and energy conversion characteristics respectively. Results showed that the TW-GIA metal transfer modes can be divided into: short-circuit transfer (SCT), main wire projected transfer + side wire globular transfer (PGT), main wire streaming transfer + side wire projected transfer (SPT) and main wire streaming transfer + side wire streaming transfer (SST). Moreover, the process parameter ranges corresponding to the four modes were summarized. Due to the stable arc and the uniform metal transfer process, SPT and SST can form desirable weld seam. The gravity and z-axis components of electromagnetic force are the main forces that promote metal transfer. The x-axis and y-axis components of the electromagnetic force deviate the metal transfer path from the arc coverage. Due to the change of arc conductive channel, the energy transferred from TW-GIA to the base metal is less than that of GMAW, showing the advantages of small welding deformation, narrow heat affected zone and grain refinement.

scholarly journals Analysis of metal transfer in gas metal arc welding

2019 ◽  
Author(s):  
Emad Uddin ◽  
Usman Iqbal ◽  
Nabeel Arif ◽  
Samiur Rehman Shah
Keyword(s):  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Metal Transfer ◽  
Metal Arc Welding

The influence of bypass current on metal transfer in dual-bypass gas metal arc welding

2019 ◽  
Vol 38 ◽  
pp. 179-186 ◽  
Author(s):  
Jiangkang Huang ◽  
Wei Pan ◽  
Wenting Yang ◽  
Cheng Xue ◽  
Yu Shi ◽  
...  
Keyword(s):  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Metal Transfer ◽  
Metal Arc Welding
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