Open AccessImpoving the quality of products created by additive technologies on the basisi of tig welding
Author(s) -
Oleksandr Salenko,
A. V. Kostenko,
Daniil Tsurkan,
Oleksii Samoilenko,
Olga Chencheva,
В. Г. Щетинин
Publication year - 2021
Publication title -
mechanics and advanced technologies
Language(s) - English
Resource type - Journals
eISSN - 2522-4255
pISSN - 2521-1943
DOI - 10.20535/2521-1943.2021.5.1.234505
Subject(s) - waviness , welding , process (computing) , mechanical engineering , gas tungsten arc welding , materials science , mechanics , stability (learning theory) , action (physics) , kinematics , engineering drawing , metallurgy , composite material , computer science , arc welding , engineering , classical mechanics , physics , quantum mechanics , machine learning , operating system
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.