Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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INVESTIGATION OF THE PROCESS OF WELDING IN SHIELDING GASES WITH LOW-FREQUENCY MODULATION OF THE CURRENT

Solodskiy S.A. 1 Gorlov D.S. 1
1 Yurga Institute of Technology (branch) of National Research Tomsk Polytechnic University
The mathematical analysis of the technology of low-frequency modulation of the current arc combined with the cycles of the pulse wire feed (PEW). This allows a wide range, regardless of the frequency transfer metal electrode, predetermined PEW modulate the arc current with the natural frequency. This provides thermal management and crystallization processes, stabilize the formation and crystallization of the molten pool. Carrying out theoretical studies enabled us to formulate the basic criteria for a strong permanent connections to create designs for critical applications: In particular, the application of pulsed wire feed and the low-frequency modulation, can independently control the transfer of electrode metal to reduce heat input and the weld metal, thereby creating the conditions for more equilibrium structure of the weld metal and the smaller width of heat affected zone. The stabilization time of the formation and crystallization of the molten pool contributes to the improvement of weld formation and increased productivity when welding thin sheet metals. Obtain the basic mathematical models that determine the optimal parameters of the welding of the new process.