Abstract: A blank rolled in transverse directions with respect to the longitudinal axis of the blank, and with the aid of a drive for rockingly moving rolls in opposite directions, ensures that the geometry and dimensions of finished parts do not coincide with the form and dimensions of a die. A four-link articulation mechanism lifts/lowers the upper roll and transmits a rolling force thereto. Rods of hydraulic torque cylinders pivotally connect to ends of a rocker thereby transmitting oppositely directed torques and a rolling force to a lower roll. A wedge mechanism coupled to the lower end face of the lower thrust bearing lifts/lowers the lower roll thereby transmitting a rolling force thereto. A rack bar disposed between retainers horizontally moves during rolling and secures the blank using a cradle.

Abstract: The inventive method involves deforming the extremities of a plate, which has a rectangular edge and is disposed between the working surface of strikers, by ultrasonic forging with the aid of the strikers, simultaneously moving the plate in a transverse direction with respect to the longitudinal axes of the strikers and turning the strikers. Each striker is provided with a groove with a curvilinear generatrix which is made on the surface thereof with a variable radius R. The width of the plate is reduced by a value ?=R(1??/4), wherein R is the variable radius value at a point where the ultrasonic forging of the plate is carried out. The circumferential speed Vcirc.S of the striker rotation is chosen, during the plate displacement, as to correspond to the above-mentioned relationship. In the device, the circumferential speed of the striker rotation is synchronized with the plate displacement velocity. The groove of the striker is designed with the variable radius R.

Abstract: A blank is rolled by rolls in transverse directions with respect to the longitudinal axis of the blank with the aid of a drive for rockingly moving the rolls in opposite directions. The device comprises upper and lower rolls, a frame, two hydraulic power cylinders provided with pivot levers which kinematically form a four-link articulation mechanism, an upper thrust bearing and an upper axis on which an upper roll is secured. The four-link articulation mechanism is designed with the possibility of lifting/lowering the upper roll and transmitting a rolling force thereto. The device also comprises two hydraulic torque cylinders, a rocker, a lower thrust bearing and a lower axis, on which a lower roll is secured. The rods of the hydraulic torque cylinders are pivotally connected to the ends of the rocker with the possibility of transmitting oppositely directed torques and a rolling force to the lower roll.

Abstract: The inventive method involves deforming the extremities of a plate, which has a rectangular edge and is disposed between the working surface of strikers, by ultrasonic forging with the aid of the strikers, simultaneously moving the plate in a transverse direction with respect to the longitudinal axes of the strikers and turning the strikers. Each striker is provided with a groove with a curvilinear generatrix which is made on the surface thereof with a variable radius R. The width of the plate is reduced by a value ?=R(1??/4), wherein R is the variable radius value at a point where the ultrasonic forging of the plate is carried out. The circumferential speed Vcirc.S of the striker rotation is chosen, during the plate displacement, as to correspond to the above-mentioned relationship. In the device, the circumferential speed of the striker rotation is synchronised with the plate displacement velocity. The groove of the striker is designed with the variable radius R.