| 摘要 |
A system for securing first and second parts together via a spheroid, wherein the first part has an aperture slightly smaller than the spheroid while the second part and spheroid each include ultrasonically fusible material. The system comprises means for supporting the two parts in superposed relation so that the aperture in the first part overlies a portion of the second part, means containing the spheroid among a plurality thereof, and means including a concentrating horn for applying ultrasonic energy to the spheroid, the horn having a tip provided with a hemispherical depression connected to a source of vacuum for receiving and releasably retaining the spheroid. The system also comprises means for moving the horn from the containing means, where the tip receives and retains the spheroid, to the parts-supporting means, where the tip deposits and releases the spheroid in the aperture so that a portion of the spheroid extends therethrough into contact with the underlying portion of the second part. The system further comprises means for activating the horn to ultrasonically vibrate its tip against the spheroid and thus impart ultrasonic energy to both the spheroid and the underlying second part, thereby heat-softening the spheroid and second part and causing the spheroid material to flow through the aperture, fuse with the second part material, and overlap an adjacent portion of the first part, whereby the two parts, via the spheroid, are firmly secured together.
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