| 摘要 |
<p>1,082,286. Jointing. GENERAL DYNAMICS CORPORATION. May 26, 1965 [June 11, 1964], No. 22345/65. Headings B3Q and B3V. Two members are joined together by a combination of magnetic forming and shrink fitting in which the temperature of at least one member is varied to an abnormal temperature, a time varying magnetic field is generated which interacts with an induced current in either of the members causing that member to move into contact with the other member, and the members are returned to their normal temperature. In a first embodiment, a rod 21 is joined to a tube 19 by heating the tube 19, cooling the rod 21, placing the rod and tube in a coil 11 through which is passed a high amperage current pulse from a capacitor bank 31 through a suitable switch 37, e.g. a thyratron or ignitron and returning the rod and tube to their normal temperature. If the tube 19 is a bad conductor a conductive sleeve 22 may be used as a driver to compress the tube 19, the sleeve 22 subsequently being removed, e.g. by chemical dissolution. In a second embodiment the coil is also provided with a source of high frequency alternating current which is used to heat the tube before it is magnetically formed. In a third embodiment two concentric tubes are joined using a coil which is placed inside the innermost tube.</p> |
