Single electrical signal excitation ultrasonic elliptic vibration metal welding device

Abstract

The invention discloses a single electrical signal excitation ultrasonic elliptic vibration metal welding device which comprises a pressurizing device, an ultrasonic vibration isolation device, a housing unit, an ultrasonic vibration transducer arranged in the housing unit, an elliptic vibration mode converter, a vibration head arranged at the front end of the elliptic vibration mode converter, an upper sound electrode and a lower sound electrode which are arranged below the vibration head, and an ultrasonic power supply, wherein the housing unit comprises a front baffle, an inner sleeve and a rear baffle; the ultrasonic vibration transducer comprises a bolt as well as a rear cover plate, a piezoelectric ceramic piece, electrode plates and a front cover plate which sleeve the bolt in sequence; the rear cover plate, the piezoelectric ceramic piece, the electrode plates and the front cover plate are connected and compressed through the bolt; the elliptic vibration mode converter is cylindrical and arranged at the front end of the front cover plate; three staggered rectangular gaps are formed in the upper and lower sides of the elliptic vibration mode converter; the elliptic vibration mode converter can convert longitudinal ultrasonic vibration generated by the ultrasonic vibration transducer into longitudinal-flexural composite ultrasonic elliptic vibration of the tail end of the elliptic vibration mode converter and the vibration head.

Description

technical field [0001] The present invention relates to the technical field of ultrasonic vibration metal welding, in particular to an ultrasonic vibration metal welding device which generates ultrasonic elliptical vibration by excitation of a single electric signal. Background technique [0002] As a kind of mechanical vibration, ultrasonic wave is also the carrier of energy transmission, and has been widely used in actual production and life. At present, the application of ultrasound in the field of welding is becoming more and more extensive. A series of new technologies have emerged, such as ultrasonic plastic welding, ultrasonic metal welding, ultrasonic brazing, arc ultrasonic welding technology, ultrasonic-TIG hybrid welding and ultrasonic-MIG hybrid welding. [0003] Ultrasonic metal welding is converted from a 50Hz low-frequency current to a 15-20KHz high-frequency current. The high-frequency electric energy is converted into mechanical vibration energy by a welding...

AI Technical Summary

Problems solved by technology

At present, most researchers use two vibration forms of longitudinal vibration, torsional vibration, bending vibration and radial vibration to combine to generate ultrasonic elliptical vibration. If there are two or more vibration modes, each group of piezoelectric ceramic sheets must be equipped with an ultrasonic drive power signal, and the phase difference between the ultrasonic dr

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