Means for tenon-forming a shroud to a turbine rotor

A tenon-forming machine for peening a blade tenon to secure a shroud band to a bladed turbine rotor, comprising means for supporting a turbine rotor on a horizontal axis at two locations offset on opposite axial sides of the axial region of a rotor stage at which shroud bands are to be secured to adjacent blades of the stage, tool-supporting means on one laterally offset side of the horizontal axis of turbine-rotor support, an elongate horizontally oriented cross-brace rail on the other lateral side of the horizontal axis of turbine-rotor support and supported by and between both rotor supports, and means including a chuck forming part of the turbine-rotor support means for engaging and selectively partially rotating a turbine rotor supported thereby;

• said tool-supporting means comprising a main slide and fixed horizontal ways for its travel parallel to the rotor axis, a secondary slide carried by said main slide and guided for horizontal action normal to the rotor axis, riveting means including an orbital riveting head carried by said second slide and oriented normal to the rotor axis, an induction-heating element and movable support therefor such that said element may be positioned in and out of induction-heating relation with a blade tenon in advance of a tenon-forming cycle of riveting-head action on the blade tenon, and a tie rod for selectively connecting said secondary slide to the cross-brace rail on a transverse alignment close to but offset from the rotor axis.