GB1174624A - Method of Mechanically-Uniting Sintered Material Parts - Google Patents

Abstract

1,174,624. Jointing; riveted joints; brazing. FEDERAL - MOGUL CORP. 18 May, 1967, No. 23049/67. Headings B3R, B3H and B3V. [Also in Division B5] A method of jointing two or more parts 22, 24, Fig. 1, of sintered powdered material, e.g. iron, bronze or nylon, comprising forming the parts with opposed recesses 28, 46, forming a coupling portion 26 alignable with the recess 46, pressing the parts together so that the portion 26 enters the recess 46 and is deformed laterally into interlocking engagement, Fig. 2, with a side 52 of the recess 46. As shown, a pair of annular coupling portions 26, 44 are used which are integral with the parts 22, 24, the coupling portions and recesses being relatively offset laterally and opposed surfaces 32, 56, 38, 50 having different angles so that the surfaces 38, 56 cam the coupling portions 26, 44 laterally as the parts are pressed together. A gap may be left between the parts, Fig. 6, for a layer 70, 72 of bonding material, e.g. brazing metal, inserted e.g. by flowing after the interlocking stage. Alternatively, rings of brazing material (132), Fig. 14 (not shown), may be located at the bottom of the recesses 28, 46. Two or more sets of interlocking projections and recesses may be formed, Fig. 7 (not shown), or annular projections and recesses may be interrupted by radial keys (80), Fig. 8 (not shown), for preventing relative rotation between the parts. In another form, Fig. 10, the coupling portions 96 have recesses 104 engaged by projections 118 in opposed recesses 107. The projections 118 expand the ends of the portions 96, Fig. 11 (not shown), and raised edges 108 surrounding the recesses are cammed inwardly by surfaces 112 surrounding the portions 96. In addition to opposed projections and recesses, frusto-conical washers 216, Fig. 15, may be used which are flattened during the interlocking operation and penetrate the parts, Fig. 17 (not shown). In a further form, Fig. 18, separate coupling members 266 are used which are expanded by projections 280, 282. Toothed coupling members 306, Fig. 21, may be used, the internal teeth 336 of which are contracted and the external teeth 334 expanded by ribs 338, 340. In another form, Fig. 26, a steel coupling member 416 is deformed as it enters sinuous passages 454 in the sintered parts 410, 412 as these are pressed together, Fig. 27 (not shown). The passages may have uniformly tapering portions, Figs. 31 and 33 (not shown).