A machine for forming recreated screws and similar work pieces that have a head and a vástago. (Machine-translation by Google Translate, not legally binding)

摘要

A machine for forming by upsetting screws and similar workpieces having a head and a shank, comprising a plurality of pairs of dies, each of which includes a die for the shank of the workpiece and another matrix for the work head. The same, in which the dies for the shanks of the pieces are mounted on a reciprocating mobile carriage, with the geometrical axes of said cylindrical shank matrices parallel to the direction of the reciprocating movement of the trolley, and in which the dies for the heads of the parts are mounted on a fixed part of a stationary bed of the machine, in such a way that each head die is aligned with its respective stem die according to the axis of the last, and so that, when the car moves towards the aforementioned fixed delivery of the bench in a career of work, the matrices of each pair come together to form any piece that is between them; each of said cylindrical shank dies being provided with an ejector pin having a moving active end or along the cavity of the shank die, means being provided for moving the ejector pins, relative to their shank dies, towards the head ends of their respective rod matrices, during the movement of said carriage in a return stroke in the direction of lodging of said fixed part of the bed of the machine, in such a way that, during at least part of the said carriage return stroke, said active ends of the ejector pins remain stationary with respect to said machine bed, the arrangement being such that, after a part has been formed between the matrices of any of said pairs, during the aforementioned part of the subsequent return stroke of the carriage, the shank of the part will be ejected by the respective shank ejecting from the respective the shank matrix is at a speed such that the piece remains stationary with respect to the bed of the machine, the machine including means arranged to grip the piece that leaves each of said cylindrical shank dies during said part of the stroke. Return, and to move each piece to place it in line with the next pair of matrices, after the piece has completely left the respective shank matrix. (Machine-translation by Google Translate, not legally binding)