ES378595A1 - Manufacture of wiping rings with internal grooves and expander springs - Google Patents

Abstract

Improvements in the manufacture of segments, with slot and expander, or additional spring, adjustable by thickness and profiles, for circumferential, radial pressure; whose segments are manufactured by compression, by means of mold-matrices, essentially characterized, by comprising mold-matrices, made up of several interchangeable parts, from unit to totally, operatively arranged, consisting of a mobile upper punch-base (1), which fits with an intermediate ring (2), attached to a lower base (3), integral with the press table, both concentrated by a centering ring (4), which rests on the table, all of them supported by the effect of the disc -punch (5), integral with the mobile upper punch-base (1) and whose coordinated exchanges, allow to vary the section and the types of the compressed segments, with the whole of the mold-matrix; for profiling the copper bars, to the appropriate shape and sizes, to the types and characteristics of the segments to be compressed, with the grooves and engravings coined by the punch-disk, and alternating radial channels in the lower base; by drawing, and laminating to the appropriate thickness round (10) steel wire, in isosceles (11) square (12) and rectangular (13) profiles; for cutting and bending the pieces, forming circumferentially open expansive springs (9) with them, to lodge them in the internal groove (8), of each segment, formed by punch blows, by the appropriate flap (s), where appropriate, present the compression punch disk (5); for eventually proceeding to grinding each one of the planes of a segment, carried out in a grinding machine equipped with a magnetic plate or electromagnet, with the help of a flat disc made of iron material, with a circular bevel, less thick than at the height of the segment and with the appropriate diameter, to press together with the steel ring the segment against the surface of the magnetic plate or electromagnet; for an alternative to grinding, place a disk of ferric material, in the center of the segment, resting against the internal groove (8), to accommodate the expander spring; by the possible presentation of radial channels (18), in the working crown of the lower base (3), whose compressed channels in the upper base of the segment, facilitate the exit of the excess oil, between the cylinder and the segment, this type. (Machine-translation by Google Translate, not legally binding)