Impoving the quality of products created by additive technologies on the basisi of tig welding

Authors

  • Alexander Salenko Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0002-5685-6225
  • А. Kostenko Igor Sikorsky Kyiv Polytechnic Institute, Ukraine
  • D. Tsurkan Igor Sikorsky Kyiv Polytechnic Institute, Ukraine
  • Oleksii Samoilenko Igor Sikorsky Kyiv Polytechnic Institute, Ukraine
  • Olga Chencheva M. Ostrogradsky KRNU, Ukraine
  • Viktor Shchetinin M. Ostrogradsky KRNU, Ukraine https://orcid.org/0000-0002-3666-3514

DOI:

https://doi.org/10.20535/2521-1943.2021.5.1.234505

Keywords:

аргонно-дугове зварювання; адитивні процеси; якість; точність форми; поверхневий шар

Abstract

The paper deals with the issues of obtaining the minimum waviness of surfaces formed by additive processes of TIG welding. It is known that the geometric parameters of the melt bead, which form a reproducible workpiece layer by layer, are determined by both the energy and kinematic characteristics of the process. In this case, the laying of the rollers occurs with optimal overlap, as a result of which it is possible to achieve the maximum density of the model, however, with the simultaneous appearance of a certain waviness due to thermodynamic phenomena in the melt bath. The proposed model of the formation of a bead of melt, the use of which made it possible to establish the rational conditions for laying out the layers. Experimental studies of the process of argon-arc surfacing of models of a given, regression equations for determining the controlled waviness parameter are obtained.

It is shown that the waviness parameter is influenced by dynamic phenomena and wave processes that develop under the action of a system of forces during the formation of a melt bead. An improvement in the quality of products is seen in the optimization of the methods of forming the rollers, in ensuring the dynamic stability of the movement of the working head, ensuring the appropriate overlap of the trajectories of movement along the layers of the layout by an amount of 0.5e, establishing a rational arc length, and maintaining the dynamic stability of the arc burning.

The response surfaces of the objective functions in the planes of the process parameters are constructed, which provide a clear illustration of the dependence of the controlled geometric parameters on the welding modes.

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https://doi.org/10.1177/0954405412437126

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Published

2021-06-23

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Up-to-date machines and the technologies of mechanical engineering