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Removable bonding working portions for an ultrasonic welder

  • US 5,931,367 A
  • Filed: 05/15/1997
  • Issued: 08/03/1999
  • Est. Priority Date: 08/08/1996
  • Status: Expired due to Fees
First Claim
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1. A resonator for an apparatus having a transducer for bonding workpieces with ultrasonic vibration, comprising:

  • an ultrasonic horn which is to be connected to said transducer for generating ultrasonic vibration and has a recessed portion in an exterior surface thereof at a maximum vibration amplitude point and a threaded portion provided on an upper part of said recessed portion;

    a bonding working portion having a chip base fitted in said recessed portion and a chip body provided on said chip base; and

    a screw member movable in a direction perpendicular to a vibration direction of said ultrasonic vibration and having a screw portion to fit into said threaded portion and a through-hole through which said chip body is put without contact with said screw member so that when said screw portion is screwed into said threaded portion, said bonding working portion is fixed to said ultrasonic horn by said screw member at the maximum vibration amplitude point of said ultrasonic horn such that a front end of said chip body projects through said through-hole and contacts a workpiece while said chip base is held between said screw member and a bottom of said recessed portion.

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