Investigation of strengthening effect on the machining rigidity in longitudinal torsional ultrasonic milling of thin-plate structures
| Autor: | Caiwei Xiao, Chenjun Wu, Kai Cheng, Shijin Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
animal structures Materials science Large deformation Mechanical Engineering technology industry and agriculture food and beverages Stiffness 02 engineering and technology musculoskeletal system Equivalent stiffness Industrial and Manufacturing Engineering body regions 020303 mechanical engineering & transports 020901 industrial engineering & automation Rigidity (electromagnetism) 0203 mechanical engineering Machining medicine Ultrasonic sensor medicine.symptom Composite material |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture. 234:665-670 |
| ISSN: | 2041-2975 0954-4054 |
| DOI: | 10.1177/0954405419875346 |
| Popis: | Weak-stiffness structures are difficult to be machined because of their low stiffness, large deformation and poor stability through conventional machining. Ultrasonic-assisted machining has the superiority of reducing cutting force and increasing stiffness, which can result in better cutting performance particularly in machining weak-stiffness structures. In this article, the stiffness-strengthening effect of longitudinal torsional ultrasonic milling of thin-plate structures is thoroughly investigated by theoretical analysis and experimental trials. The strengthening coefficient of equivalent stiffness is obtained by analyzing the forced vibrations of the thin-plate structure under conventional milling and ultrasonic milling loading, respectively. The ultrasonic vibration period and the actual cutting time in one ultrasonic vibration period are proved to be the factors responsible for the stiffness-strengthening effect in ultrasonic cutting. When compared with conventional milling, longitudinal torsional ultrasonic milling trials show that the equivalent stiffness of the machining system can be increased by 1.92 times, despite the rigidity strengthening coefficient decreases with the increasing spindle speed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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