文章摘要
谢东岳,孔德义,李国欣,胡明,徐贺,钱玉洁,唐晓宁.单层宽频柔性微穿孔板的加工方法和声学特性研究[J].声学技术,2021,40(1):82~88
单层宽频柔性微穿孔板的加工方法和声学特性研究
Study on the fabrication method and sound absorption performance of single-layer wide-band flexible micro-perforated plate
投稿时间:2019-11-25  修订日期:2020-01-09
DOI:10.16300/j.cnki.1000-3630.2021.01.013
中文关键词: 柔性微穿孔板  超微孔径加工  宽带吸声
英文关键词: flexible micro-perforated plate  ultra-micro-aperture processing  broadband sound absorption
基金项目:国家自然科学基金资助项目(11774355,11474291)、国家自然科学基金青年项目(11604077)
作者单位E-mail
谢东岳 合肥工业大学, 安徽合肥 230009  
孔德义 中国科学院合肥物质科学研究院, 传感技术联合国家重点实验室, 安徽省仿生感知与先进机器人技术重点实验室, 安徽合肥 230031 kongdy@iim.ac.cn 
李国欣 中国科学技术大学, 安徽合肥 230026  
胡明 合肥工业大学, 安徽合肥 230009  
徐贺 中国科学院合肥物质科学研究院, 传感技术联合国家重点实验室, 安徽省仿生感知与先进机器人技术重点实验室, 安徽合肥 230031  
钱玉洁 河海大学常州校区, 江苏常州 213022  
唐晓宁 武汉纺织大学, 湖北武汉 430200  
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中文摘要:
      针对单层微穿孔板吸声带宽较窄、常规加工方法难以制造超微孔径微穿孔板等技术现状,着重研究了具有较宽吸声频带的单层柔性超微孔微穿孔板的加工方法,包括微机电系统(Micro-Electro-Mechanical System,MEMS)模板浇铸脱模法、热压印穿孔法、针辊式穿孔法、数控铣床穿孔法,并比较、分析了这些加工方法各自的特点。其中MEMS模板浇铸脱模法和数控铣床穿孔法都可以实现孔径小于100 μm的超微孔柔性微穿孔板加工。前者可以实现批量化加工,但成本较高;后者加工精确,但不适合孔径过小、穿孔密度太大的柔性微穿孔板批量化加工。热压印穿孔法和针辊式穿孔法可以实现批量化加工,不过难以加工出孔径100 μm以下的超微孔,且加工误差较大。进而,加工了多种柔性材质的微穿孔板膜片,包括聚二甲基硅氧烷,硬纸板,聚氯乙烯(Polyvinyl Chloride,PVC),聚碳酸酯,耐高温聚酯。其中,采用数控铣床穿孔法加工的PVC微穿孔板膜片有较好的吸声性能,部分单层PVC微穿孔板的吸声带宽可以达到3倍频程。
英文摘要:
      In order to improve the acoustic properties of single layer micro-perforated plate limited by conventional processing technology, several approaches to fabricating flexible micro-perforated plate, including micro-electro-mechanical system (MEMS) molding, hot imprinting, needle roller puncturing, and computerized numerical control (CNC) milling, are studied in this paper. Both MEMS molding and CNC milling are capable of manufacturing apertures less than 100 microns; batch processing can be realized with MEMS molding, but the process to develop MEMS mold is time consuming and costly. The CNC milling is accurate, but it is not suitable for batch processing of flexible micro-perforated plates with too small aperture and too high perforation density. Batch processing can also be achieved with hot imprinting and needle roller puncturing, but it is difficult to manufacture apertures below 100 microns, and the machining error is significant. For comparison, a variety of polymer materials, including Polydimethylsiloxane, Paperboard, Polyvinyl Chloride (PVC), Polycarbonate, Polyethylene Terephthalate, are used to develop flexible micro-perforated plates, among these, PVC micro-perforated plates processed by CNC milling have better sound absorption performance, the maximum bandwidth of single layer PVC absorber reaches 3 octaves.
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