Dynamic model of shock-vibrating machining of welded joints by ultrasonic tools with an intermediate striker
| Autor: | I. K. Vaganov, M. M. Ganiev |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Engineering
business.industry Oscillation Mechanical Engineering Acoustics Automatic frequency control Resonance Welding Structural engineering Industrial and Manufacturing Engineering Clamping law.invention Shock (mechanics) Machining law Ultrasonic sensor Safety Risk Reliability and Quality business |
| Zdroj: | Journal of Machinery Manufacture and Reliability. 36:163-169 |
| ISSN: | 1934-9394 1052-6188 |
| DOI: | 10.3103/s1052618807020112 |
| Popis: | Using the methods of the theory of shock-vibrating machining systems, machining by ultrasonic tools with a loose striker is considered in the form of forced oscillations of a two-weight system with two impact joints. The amplitude-frequency and phase-frequency characteristics of an ultrasonic shock-vibrating system under machining load are computed. The stability of shock-vibrating oscillations as a function of the tool design parameters and machining conditions is investigated. The independence of the ultrasonic converter resonant frequency from the clamping pressure up to the stability threshold is established. The parameters (clamping, excitation frequency) of the most effective mode of shock-vibrating machining, in which a maximum transfer of acoustic energy to the medium being machined is achieved, are determined. It is shown that the resonant frequency of the converter under load does not coincide with the maximum of the amplitude-frequency characteristic of the striker; therefore, the traditional automatic frequency control system adjustment to the converter resonance is not capable of ensuring oscillation excitation of the shock-vibrating system at the frequency of the most productive mode of machining. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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