| 摘要 |
1,259,800. Riveting. HI-SHEAR CORP. 7 Oct., 1969 [7 Oct., 1968], No. 49272/69. Heading B3U. [Also in Division F2] The countersink surface 30 of the head of a rivet is non-congruent with the countersink surface 23 of a countersunk hole in a metallic workpiece so that during the formation of a joint in which the two countersink surfaces are fully contiguous, plastic deformation of the countersink surface on the workpiece occurs. Either one of the countersink surfaces may be convex relative to the other prior to riveting (Figs. 4 and 5, not shown). |
