Technological development of a method to ensure process stability and protect the internal surfaces during the electron-beam welding of hollow spherical and cylindrical vessels made of titanium alloys

The paper considers a technological problem of ensuring cleanliness and state of the internal surfaces in manufacturing the titanium cylinder welded structure with a limited access to the internal cavity used in tank containers of the rocket and space cryogenic fuel components. To solve the problem, the paper proposes an original design of the combined protective screen with copper inserts and devices for their installation, fixation and removal from the product. Such inserts dampen the electron beam residual emission and limit the molten metal splashes spread. The proposed method of protecting the inner surface from splashes and melting by the electron beam residual emission of the closed cavities of hollow spherical vessels made of titanium alloys during the electron beam welding of the ring joints was developed. Study results are provided to confirm the resulting connection quality, solution to the problem and compliance of the product in general with requirements of the design documentation.
EDN: PMRTNE, https://elibrary/pmrtne

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