Ensuring the quality of electron beam welding assembly

Abstract

In the process of welding, to obtain a quality welding joint, reliable mutual fixation of the
welded parts of the product is necessary.
One of the methods of fixing the two elements of the product, which have the form of
rolling bodies, excluding the displacement during welding, offered their pre-assembly with
guaranteed negative allowance. The theoretical justification of the choice of the preload of the
female element (bushing) during the assembly with the thermal action depending on the
temperature axial, radial and circumferential deformations caused by electron beam welding is
given in the article. To substantiate the choice of the optimal pull, experimental studies were carried
out on a group of samples. The spatial problem of temperature stresses is solved theoretically. As a
result of theoretical and experimental studies, a dependence was obtained to determine the required
value of the preload.
This method of calculation makes it possible to obtain simplified expressions for
temperature deformations, as well as the necessary preload of the joint for assembly by the thermal
action method, by induction heating of the male part, based on the conditions for not opening the
welded joint. The considered method of determining the value of preload allows us to ensure highquality electron-beam welding.