Darbo tikslas yra, pagaminti ultragarsinį lituoklį laboratorinėmis sąlygomis, skirtą mokymo tikslam. Apžvelgus literatūrą, yra modeliuojama kompaktiškesnė ir mažesnė ultragarsinė pjezomechaninė sistema. Sukonstravus ir pagaminus eksperimentinį pavyzdį, jis yra eksperimentiškai ištiriamas, tai yra, juo bandoma lituoti prie sunkiai lituojamų medžiagų, tokių kaip: aliuminis, stiklas, keramika ir saulės cėlės. Pateikiami bandymų rezultatai. / The aim of this – are CONSTRUCTION AND RESEARCH OF ULTRASONIC SOLDERING IRON. To achieve this, it was raised four challenges: 1) Examine existing ultrasonic soldering iron type, 2) Simulated ultrasonic piezo system, 3) Designed and produced an experimental model, 4) Experimentally investigate constructed ultrasonic soldering iron sample . After literature review is modeled more compact ultrasonic piezo system. Soldering tip is selected from a simple soldering iron, so all system is coordinated to it. Selected wavelength transducer, for the larger sizes, so delaying piezo ceramics from the fusing soldering tip. Designed and built an experimental model, it is experimentally investigated. First performed impedance - frequency and amplitude-frequency characteristics. Then, ultrasonic soldering iron is experimentally tested. Trying to solder, hard solder materials such as aluminum, glass, ceramics and solar cells. Then are presented test results.