METHOD FOR ELECTRON-BEAM WELDING OF CLOSED SPHERICAL AND CYLINDRICAL VESSELS AND PROTECTIVE DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC B23K15/06 B23K37/06 

FIELD: technological processes.

SUBSTANCE: invention relates to a method and a device for one-sided electron-beam welding of spherical and cylindrical vessels. Welding is performed with through penetration and formation of root seam under conditions of limited access into inner cavity, at the same time protection against welding spray and fusion of surface of main material of produced vessel is achieved. Protective device with expansion device is installed and fixed on one of jointed edges. It is assembled with the second mating edge of the vessel with closing of the protective device in the inner cavity of the vessel and output of the hollow bolt of the protective device through the passage hole of the vessel. Tacking and electron-beam welding at joint in high vacuum with subsequent extraction of all elements of expanding device through available passage hole of vessel with its ratio to diameter of joint in place of installation of protective device is more than 1:18. Excluding additional cleaning of inner cavity of vessel.

EFFECT: invention ensures the required quality and reduces labor intensity when producing closed spherical and cylindrical vessels.

2 cl, 3 dwg