| 摘要 |
There is disclosed an externally threaded shank, such as that of a bearing or clevis or eyebolt, or an externally threaded nipple, such as that of a tubular insert, fixedly and nonrotatably secured to and disposed within the internally threaded bore of a tube. In connection with shanks, longitudinal slots are provided therein. In connection with nipples, an end flange or shoulder with notches therein is provided. In connection with tube end portions, to receive either a shank or nipple, notches are provided in an end wall thereof. Then a sleeve, preferably of like but softer material than the tube and of larger diameter than the tube, is disposed on the shank or on the nipple and adjacent the notches or slots in the tube end portion. The sleeve selectively employs either a smooth bore, an internally threaded bore, lugs on either end wall thereof, or an internal spline, or combinations of less than all thereof. Then the sleeve is cold pressed providing metallic flow and migration of metal into the threads of the shank adjacent the tube end wall and into the longitudinal slot in the shank, if a shank is employed; or into the threads adjacent the tube end wall, into the nipple notches, and into the notches in the tube end wall, if a nipple is employed. A shank or a nipple thus nondetachably secured to a tube is the product of this invention.
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