Influence of ultrasound on forming force in thin sheetmetal microforming using molten plastic as flexible punch
In this paper, a measuring force method was proposed for a special ultrasonic microforming method -- Micro Ultrasonic thin Sheetmetal Forming using molten plastic as flexible punch (short as Micro-USF), and the unique force change law in Micro-USF was observed. Using a flexible punch of the methyl s...
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| Main Authors: | , , , , , , , |
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| Format: | article |
| Language: | EN |
| Published: |
Elsevier
2021
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| Subjects: | |
| Online Access: | https://doaj.org/article/6380ea45d3804d1f98f3d7e1e84eec6b |
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| Summary: | In this paper, a measuring force method was proposed for a special ultrasonic microforming method -- Micro Ultrasonic thin Sheetmetal Forming using molten plastic as flexible punch (short as Micro-USF), and the unique force change law in Micro-USF was observed. Using a flexible punch of the methyl silicone oil in the contrast experiment, the influence of ultrasound on the forming force in Micro-USF was investigated. The force transfer properties of the methyl silicone oil and molten EVA were analyzed (the molten EVA is a flexible punch used in Micro-USF). Experiment results showed that the ultrasound could significantly decrease the forming force in Micro-USF. Compared with the contrast experiment, the forming force in Micro-USF could be decreased by 74.7% and 91.0% respectively under the pre-pressure force of 196 N and 98 N when an arc-shape cross section microchannel with an opening width 755.1 μm and depth 247.8 μm was formed for an annealed copper sheet with a thickness of 30 μm. |
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