| 摘要 |
1295291 Rivets; bolts HAWKER SIDDELEY AVIATION Ltd 5 Jan 1970 [9 Jan 1969] 1474/69 Heading F2H A rivet 11 or other headed securing element has a solid convex domed head 12 with a height considerably less than the height of a hemispherical head, and a shank 13 which is flared out under the head in a smooth concave profile from the normal shank diameter to the full diameter of the head. The rim of the head may be in the form of a short cylindrical portion 16. The head may have a flattened central region. When joining two plates 15 of equal thickness, the radius of curvature of the flared portion preferably equals the thickness of one plate. In making a joint, the countersink in the top plate is not fully cut out, leaving some metal to be peened on or before riveting. |
