ES219226A1 - A procedure for the manufacture of metal links for air pumps (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Process for the manufacture of metallic bonds for air pumps, which essentially comprises a first phase of embossing a circular metal plate, previously heated to increase its malleability, converting it into a cylindrical capsule with a low background. Then follows a second phase of annealing at low temperature, followed by two consecutive sausage operations in which the depth of the capsule is increased at the expense of its diameter. A third phase similar to the second one follows in which the capsule is subjected to a high temperature annealing to give it a maximum malleability and after this, it goes through two successive operations of punching until a tubular capsule is obtained in a third punching after the first two, in which its blind end is lengthened by decreasing its diameter, with which the capsule has a larger diameter back part and an anterior one, of small diameter, with a step or transition zone formed between them. Then follows a fourth phase in which the piece obtained is subjected to the action of a rulinas that form at the ends of the area of greater diameter two circular moldings in relief, half-section section and three or more moldings of section in shape sawtooth in the area of smaller diameter, whose end is drilled, disappearing from the transition zone. Next, and in a fifth phase, the edge of the area of greater diameter, including the end molding, is inserted in a circular groove, made at the base of a circular bushing with a threaded central hole, whose edge is repelled by means of rulinas. And die cutting the circular slit and imprisoning the end of the obtained cylindrical piece thereby forming the bond. Finally, it undergoes a final phase of polishing and finishing. (Machine-translation by Google Translate, not legally binding)