| 摘要 |
<p>1,126,038. Welding by pressure. WESTERN ELECTRIC CO. Inc. 23 Dec., 1965 [6 Jan., 1965], No. 54529/65. Heading B3R. In bonding a first body to a second body the intended bond areas are held in contact, at least the bond region, i.e. the region to undergo deformation, of one of the bodies is maintained at a temperature within its hot working temperature range i.e. the temperature range within which plastic deformation is not accompanied by strain hardening, but below the melting point of either body and applying ultrasonic vibratory energy to the bodies to effect a bond. A glass plate 11, Fig. 1, having a tantalum film 12 sputtered thereon is clamped on an anvil 10 and an aluminium lead 13 is positioned under the tip 27 of an ultrasonic welder 26 and over the film 12. The tip 27 holds the workpieces together and the lead 13 is resistance heated by means of a first conductor 31 attached to the lead and a second conductor 32 attached to the welder 26 or is heated by gas passed through a resistance heat gun and directed through a nozzle 50 on to the lead. The gas may be argon to minimize oxidation. Infra-red heating or a combination of resistance and gas heating may be employed. When the lead is correctly heated e.g. to 400‹ C. and while heating is maintained ultrasonic energy is supplied by the tip 27 in a direction at right angles to the holding force for the workpieces. The ultrasonic energy may be terminated at the same time as or before the heating is stopped.</p> |
