Khoan lỗ sâu trên hợp kim nhôm có trợ giúp của rung động tần số thấp

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Tác giả: Duy Hội Lê, Văn Dự Nguyễn, Văn Nghị Phan

Ngôn ngữ: vie

Ký hiệu phân loại: 622.2 Excavation techniques

Thông tin xuất bản: Khoa học và Công nghệ các trường đại học kỹ thuật, 2013

Mô tả vật lý: 75-81

Bộ sưu tập: Metadata

ID: 558037

This paper introduces an application of low-cost vibration assisted deep drilling for aluminum alloy AA5052. An eccentric rotary mechanism was used to induce vibration for the workpiece. The vibration was integrated in feeding direction with a frequency range from 26 to 60 Hz and an amplitude range from 2 to 12 micrometers. Holes with L/D ratio of 9, with diameter of 1.5 mm versus depth of 13 mm, have been machined in both methods of conventional and vibration assisted drilling. Oversize and diameter variants of holes obtained from 18 samples were then analyzed and compared using the 2 sample t-test method. The results showed that, compared to conventional drilling, vibration assisted drilling can reduce the oversize ratio by as much as 3 times and also by 2 times for the out of roundness of the holes. The tool jam and tool crash, which are usually occuffed in conventional drilling, had not been happened in cutting with vibration assisted. This implies a very promising and low-cost way to enhance production rate as well as high quality in drilling difficult-to-cut materials using vibration assisted.
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