US 5,460,776 A · Process for producing connected sintered articles

Abstract

The invention relates to a method of producing connected sintered articles obtained by breaking a unitary preform. It is characterized in that: a) a preform is pressed from powdered metals while imprinting in it a superficial groove (3) located in a plane for the purpose of subsequent breakage, b) this preform is presintered in order to consolidate it mechanically, the preform however remaining brittle, c) it is optionally compacted by recompression, d) recesses for the members for the mechanical connection of the final parts are optionally machined in this preform, e) this preform is broken into at least two parts, f) final sintering is carried out, g) the articles are cooled. The invention is applicable in particular to the production of connecting rods and connecting rod covers or of annular articles with or without an undercut (broken in the axial plane).

Claims11

Dependent claims

A process for producing connectable sintered metallic articles, comprising the steps of:

a) pressing a preform from powdered metals, imprinting in said preform during said pressing a superficial groove in an outwardly directed external surface of said preform, said groove being located in a plane for the purpose of subsequent breakage;
b) presintering to consolidate the preform;
c) optionally compacting the consolidated preform by recompression;
d) optionally machining into the consolidated preform recesses to enable mechanical connection of said articles;
e) breaking the consolidated preform into at least two parts;
f) conducting a final sintering of each of the least two parts;
and
g) cooling the sintered parts to form said connectable metallic articles.

5 more elements

Dependencies are inferred from the claim text.

Process for producing connected sintered articles

Life of this patent

Process for producing connected sintered articles

Life of this patent

Abstract

Claims11