Patent ID: 8607606

Claim:
A method for producing a rounded edge of variable thickness on a plate by ultrasonic forging, the method comprising: arranging a source plate having a rectangular edge between working surfaces of strikers, said working surfaces having at least one groove, wherein a generatrix of the at least one groove corresponding in shape to a profile of the plate after treatment of a rounded edge plate, and the generatrix having a variable radius R, and deforming the edge of the plate by the strikers provided with ultrasonic vibrations while simultaneously moving the plate laterally relative to longitudinal axes of the strikers, wherein the plate initially has a width less than that of the plate after treatment by a value Δ=R(1−π/4), where R is the value of the variable radius at the place of ultrasonic forging of the plate, by the strikers, and wherein, when the plate is moved in the lateral direction, the strikers are turned about their longitudinal axis at a circumferential velocity V Circ S defined by the following expression: V Circ S =( V Lin P ×α×πD K )/(360 ×L ), mm/sec, where: V Lin P is a plate movement velocity, in mm/sec, α is an angle of turning of the striker, in degrees, π=3.14, D K is a working diameter of the striker, i.e. the minimum diameter of an end of the striker, in millimeters, L is a plate length, in millimeters.