发明名称 |
Laser perforating process for producing an acoustical and structural microporous sheet |
摘要 |
A microporous sheet having both acoustical and structural functionality and a process for producing the sheet. Construction of the sheet requires, first of all, providing a sheet capable of functioning as a structural element of a component. A laser device capable of producing a free electron laser beam is provided, and the free electron laser beam is directed to a surface of the sheet to penetrate the sheet at a plurality of sites and thereby form a plurality of apertures. These apertures are generally uniformly dispersed and of a size and number sufficient to enable the sheet to function as an acoustical noise suppressor while retaining capability of functioning as a structural element. Use of free electron laser technology permits formation of smooth-walled, circular or non-circular apertures tailored to exact geometry specifications controlled to a nanometer in size, and produces a microporous sheet having structural functionality while meeting acoustic requirements with clean, unclogged apertures and with low friction-to-surface and/or boundary-layer control airflow.
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申请公布号 |
US5965044(A) |
申请公布日期 |
1999.10.12 |
申请号 |
US19970910945 |
申请日期 |
1997.08.14 |
申请人 |
NORTHROP GRUMMAN CORPORATION |
发明人 |
CLARKE, JAMES A.;PARENTE, CHARLES A. |
分类号 |
G10K11/16;G10K11/172;(IPC1-7):B23K26/00 |
主分类号 |
G10K11/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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