US 2004/0244194 A1 · Metal ring assembly which is assembled and soldered to a support collar in order to form the annular cooling conduit of an internal combustion engine piston, the method of producing said finned metal ring and the metal ring thus obtained

Abstract

The mounting consists of a metal sheet ring, which cross section is substantially like a “U”, wherein the free ends of the “U” branches rest and couple to the annular seats being defined in the inside face of the carrier hoop, matching their curbs of internal edge; wherein said support and coupling are sealed by respective annular welding beads extending along the mentioned annular seats and rest on the body of the carrier hoop, being conformed an inside annular cooling tube which inside surface is constituted by a metal sheet ring and the inside diametrical surface of the carrier hoop extending between said two annular seats. The method is as follows: take a flat metal sheet of a desired thickness, and cut it creating a circular disk; produce, by stamping on said disk, a circumferential wall having a folded edge of diverging fin; cut and remove the circular bottom, by stamping the piece being constituted in the previous step; take the ring constituted in the previous step and form a second folded edge of diverging fin by stamping the circular edge opposite to the one already existing in the first diverging fin. The metal sheet ring being obtained consists of a sole body of metal sheet which cross section is a “C” profile with diverging fins responding to different pre-established designs.

Claims11

Dependent claims

METHOD OF A MOUNTING OF METAL SHEET RING ASSEMBLIED AND WELDED IN A CARRIER HOOP TO CONFORM THE ANNULAR COOLING TUBE OF A PISTON OF AN INTERNAL COMBUSTION ENGINE, of the type that uses a metal sheet ring (5), whose cross section comprises a web (15) extending between two fins (10) and (11) projecting towards the carrier hoop (6), wherein the free ends of said fins rest on and couple to respective annular seats (8) and (9) being defined in the internal face of the carrier hoop, matching its curbs of internal edge;

where said support and coupling are sealed by respective annular welding beads (14) extending along the mentioned annular seats and rest on the body of the carrier hoop, being conformed an internal annular cooling tube (3) which inside surface is constituted by a metal sheet ring and the internal diametrical surface (7) of the carrier hoop extending between both annular seats, characterized in that for said support and coupling it is presented a preform of the metal sheet ring (5) that has a fin (10′) of the “U” cross section thereof open at an angle larger than the other one (11), such that the free end of said preform fin (10′) is less than the diameter of the interior surface (7) of the carrier hoop (6);
whereas the diameter of the free end of the' other fin, (11) of the same preform is greater than that' of said interior surface (7) of the support hoop (6), being the mounting completed with a final stamping operation performed by means of a ‘tool (I1) that has external dies 06/37) which provide the ultimate support and format to said fin (10) of the metal sheet ring (5).

METHOD OF MANUFACTURE A FIN METAL SHEET RING, ASSEMBLED WITH A CARRIER HOOP from taking a flat metal sheet of adequate thickness, cutting the same conforming a circular disk;

producing, by stamping over such disk, a circumferential wall having a folded edge of diverging fin (11) is formed with a greater;
cutting and removing its circular bottom, by stamping over the constituted piece in the previous step;
taking the constituted ring in the previous step and conforming a second folded edge of diverging fin by stamping over the circular edge opposite to the one already existing in the first diverging fin characterized in that the second folded edge of the diverging fin (10′) is formed' with both a lowering angle and a greater angle than, the first folded edge of the diverging fins (11);
thereafter coming the calibrating step that consists of exactly defining said diameters of the edges of said diverging fins (10′) and (11′);
thereafter incorporating this metal sheet ring preform (5) into the carrier hoop (6), making sure that the first of said diverging fins (11) rests on the appropriate annular seat (9), whereas the second diverging fin (10) is disposed facing its appropriate annular seat (8);
thereafter coming a final stamping process that gives the ultimate support and form to said second diverging fin (10).

3 more elements

Dependencies are inferred from the claim text.

Metal ring assembly which is assembled and soldered to a support collar in order to form the annular cooling conduit of an internal combustion engine piston, the method of producing said finned metal ring and the metal ring thus obtained

Life of this patent

Metal ring assembly which is assembled and soldered to a support collar in order to form the annular cooling conduit of an internal combustion engine piston, the method of producing said finned metal ring and the metal ring thus obtained

Life of this patent

Abstract

Claims11