HARDENED METAL ARTICLE AND METHOD OF MANUFACTURE OF SUCH ARTICLES Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: hardened article includes cylindrical section brought in communication with lubrication passage via expanded conjugated surface and cold-hardened surface of rotation coaxial relative to it. Hardened metal articles are produced by hot stamping of blanks, heat treatment and machining together with making the passage for lubrication from its expanded conjugation surface which is made deeper by rotating cutting tool to form cold-hardened surface of rotation around cutting and damping tools; then sections of respective diameters are fixed as follows: locating flat is fixed to first section and bearing cylindrical flat is fixed to second section. Their longitudinal axes intersect at right angles relative to longitudinal axes of tools. Machining of each surface is continued till cylindrical section of metal article and locating cylindrical flat fay and then till section of metal article and bearing cylindrical flat fay. EFFECT: enhanced reliability. 3 cl, 4 dwg