METHOD OF MAKING BODY OF BARREL AND APPARATUS FOR PERFORMING THE METHOD Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of making a body of a barrel from a blank in the form of a hollow drum, being centered relative to an axis of feeding power members of shaping tool units; flanging beads on edges of the blank in working recesses of dies; then performing formation of rigidity ribs on a cylindrical surface of the blank by expansion of it from inside of the portions, being formed, in such a way, that the power members are being moved to their working position for shaping the rigidity ribs in synchronism with motion of dies at flanging process, and upon removal of the above mentioned power members from their working positions the beads, had been flanged, are being supported in direction from a center. Apparatus for performing the method includes a frame with forming tool units, being in the form of carriages. Each carriage includes a main body, a movable sleeve with guiding members, a tie rod and a cone. The apparatus has a mechanism for linear motion of the sleeve and the tie rod, an additional body, power members for forming beads in the form of dies, having working portions in the form of grooves. The power members for forming the rigidity ribs, being the form of a set of punches, are mounted in the carriage with possibility of engagement with the sleeve and with the cone. The punches are mounted in grooves of the additional body. A mechanism for centering the blank relative to the feed axis of the power members is mounted on the frame between the carriages, the additional bodies and the dies are mounted on the sleeves. The carriages include additional parts for controllable motion of the dies. The mechanisms for linear motion of the sleeves and the dies have power cylinders, kinematically connected with the carriages. EFFECT: enhanced structure of the apparatus, increased efficiency of the method. 6 cl, 10 dwg