| 摘要 |
<p>1,272,838. Welding by fusion; making bearing cages. FEDERAL-MOGUL CORP. 11 June, 1969 [9 Sept., 1968], No. 29701/69. Headings B3A and B3R. A bearing-roller-retaining cage is made by rolling, from strip, a ring or ring halves and electron beam welding together the ring ends or the pairs of ring half ends. As shown, manufacturing steps comprise: (i) punching windows in flat strip 10 taken from a stock roll (Fig. 1, not shown); (ii) rendering window-separating transverse ribs (14) wedgesectioned by swaging the rib sides 16 (Fig. 2, not shown); (iii) cutting off a length 10a ensuring that the length ends are planar; (iv) rolling the length 10a into a split-ring with the ends 17 proximate or abutting (Figs. 4, 5, not shown); (v) forming an assembly 30 of rollers 21 in the race-way of a double-shouldered race 24 and in the windows 12 of the split-ring, the latter being extended to achieve this assembly; and (vi) disposing the assembly in an evacuated electron beam welding chamber (Fig. 7, not shown) and holding it in a fixture (40) so that the ends 17 abut and are aligned with the beam for welding. As shown, the ends 17 are formed in the middle of a window-separating rib (14). The cage may be welded separately, i.e. without assembly with the rollers and race. To minimize splatter when the cage is of ferrous material, the latter may be a de-oxidized material, e.g. aluminium-killed steel.</p> |
