Mathematical Formula to Determine Geometrical Dimensions of Electrode Metal Droplets Transferred with Short Circuits

Ilyashchenko, D.P.; Chinakhov, D. A.; Kirichenko, Konstantin; Sydorets, Volodymyr

doi:10.4028/www.scientific.net/msf.938.1

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…These methods used with various simplifications (assumptions), for example, the arc column is stationary and coaxial with the electrode, and a drop of molten metal has the shape of a segment or a glob, etc., which significantly reduce the reliability of the results obtained. The use of modern computational and graphic programs [5][6][7] makes it possible to perform calculations with a high degree of reliability and reduces the processing time of experimental data.…”

Section: Introductionmentioning

confidence: 99%

Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization

Ильященко¹,

Крюков²,

Lavrova³

et al. 2020

Prib. metody izmer.

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The nature of the molten electrode metal melting and transfer is the main process parameter of manual metal arc welding (MMA) with coated electrodes. It significantly affects the efficiency of the welding process. For this reason the relevant task is to identify the parameters of the transferred molten electrode metal drops and their further transfer into the weld pool with maximum accuracy. The aim of the given paper is to develop a method and visual representation of the form and the geometrics (volume, area, mass) of a molten electrode metal drop.We have developed the method of simulation modeling and visualization for molten electrode metal drops transfer and their parameters. It allows obtaining highly reliable input data to be used for developing and verification of mathematical models for the thermal fields distribution along the welded item surface. The algorithm is realized as the calculation programs for specifying the molten metal drop parameters and means of its geometrics and space form visualization.We used this method to specify a number of molten electrode metal drop parameters: volume, mass, center-of-gravity position, surface area.We have established that it is possible to conduct the measurements with maximumThe suggested method significantly decreases the labor intensity of experimental studies aimed at specifying the size of electrode metal drops in comparison to the standard methods. When we know the size of the drops under certain welding conditions we can control the drop transfer process, i. e. reduce the heat input into the welded item and produce weld joints with the tailored performance characteristics.

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Section: Introductionmentioning

confidence: 99%

Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization

Ильященко¹,

Крюков²,

Lavrova³

et al. 2020

Prib. metody izmer.

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Influence of TIG Welding Thermal Cycle on Temperature Distribution and Phase Transformation in Low-cost Titanium Alloy

Akhonin

Belous

Selin

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Low-cost β-phase titanium alloys are starting to get a lot of attention and application in aircraft and mechanical engineering. They are effectively hardened by heat treatment and have a strength 10-20% higher than α-alloys. However, during TIG welding of low-cost titanium alloys, difficulties arise due to a change in the structure and the formation of metastable phases in the welded joint. The main criterion for choosing the modes of TIG welding is the optimal interval of the cooling rate in the weld, therefore it is advisable to compare different modes of TIG welding, including the use of pre-heating, by their thermal effect on the weld metal and the heat-affected zone.

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The Effect of Energy Parameters of Power Sources on the Structure and Properties of Permanent Joints at Manual Arc Welding

Il’yashchenko,

Chinakhov,

Lavrova

2024

Metals

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The study presents the results of the research into the effect of the dynamic properties of inverter and diode power sources of welding arc power supply on the stability of melting and transfer of electrode metal into the weld pool. The principal energy parameters of the power source include the rates of rise and fall of short-circuit current, the ratio of arc burning current to short-circuit current, and other related factors. It has been demonstrated that an increase in the rate of change of these parameters within one welding mode microcycle alters the properties of heat and mass transfer, increases the frequency of electrode metal droplet transfer, reduces the size of transferred droplets in the weld pool and the duration of their stay on the electrode end under the influence of the high temperature of the welding arc, and the duration of short circuits. The increase in the mass fraction of alloying elements at their transition from the coated electrode to the weld metal is demonstrated to depend on the rate of change of the main energy parameters of one welding mode microcycle of the inverter power source in comparison with the diode rectifier. An enhancement in the structural integrity and properties of permanent joints during welding has been observed when using an inverter power source for the welding arc with high dynamic properties.

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Mathematical Formula to Determine Geometrical Dimensions of Electrode Metal Droplets Transferred with Short Circuits

Cited by 3 publications

References 15 publications

Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization

Determination of Parameters of Electrode Metal Transported Drops by Simulation and Visualization

Influence of TIG Welding Thermal Cycle on Temperature Distribution and Phase Transformation in Low-cost Titanium Alloy

The Effect of Energy Parameters of Power Sources on the Structure and Properties of Permanent Joints at Manual Arc Welding

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