BELLOW-TYPE ARTICLE ASSEMBLING AND WELDING DEVICE Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: device has a mandrel with a bearing member and a cylindrical part. An axially movable clamping member and heat release rings are mounted on the mandrel. Clamping bushes are mounted between the bearing part of the mandrel and the clamping member. Holes for passing a protection gas are made in one bush. A channel mating the holes of one of the bushes is made in the bearing member of the mandrel, grooves for passing the protection gas are made on the cylindrical part of the mandrel. Holes for protection gas discharge are made in the second clamping bush and the clamping member, and the grooves on the cylindrical part of the mandrel are made in the form of cross channels to provide assembling and welding of a stack of two diaphragms around their inner diameter. The groove on the cylindrical part of the mandrel is made along a helical line with a slope angle of 45-60° and at a pitch of 10-15 mm, and radial holes for passing the protection gas are made in the cylindrical part of the mandrel to provide assembling and welding of outer ring butts of the bellows. The device has an additional removable cylindrical mandrel with grooves identical to the grooves made on the main mandrel, the additional mandrel is mounted on the cylindrical part of the main one. EFFECT: widened range of operation. 4 cl, 5 dwg