脈衝式雷射輔助氣壓之溝槽無模成形
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2014
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Abstract
溝槽管廣泛地應用於電子產業的散熱元件中，一般而言，其製作皆需透過模具抽拉成形，因此在製作更小尺度的溝槽管時，往往會產生限制。本研究試圖提出另一種加工方法來改善此成形限制，意即利用脈衝式雷射輔助氣壓無模成形，並找出製程參數對不銹鋼薄管溝槽成形之影響。本研究的成形方法是在大氣的環境下，使用一般空氣為工作加壓氣體，再利用脈衝式雷射為加熱源，在不銹鋼薄管內側成形溝槽。接著用光學顯微鏡觀察成形後金相組織，以微硬度試驗測量硬度變化，最後再以掃描式電子顯微鏡搭配能量散佈光譜儀進行觀察及分析。研究結果顯示，利用脈衝式雷射輔助氣壓無模成形可成功地在任何位置製作溝槽，在雷射輸出功率10W及氣體壓力0.1kg/cm2下，可製作出平均槽寬382.5um、平均槽深208.5um的溝槽。此結果指出，即便成品需達到微米尺度，亦能藉由無模成形的方式獲得。
Nowadays, groove tubes are widely used in the electronic cooling module. It is usually drawn which term refers to molding. However, there are limitations while producing the smaller ones. Therefore, this study emphasis on the parameters of dieless forming which affects the shaping of groove on stainless steel that generated by pulsed laser assisted air pressure. In this study, the performance is presented on the basis of standard atmospheric conditions. To begin with, the stainless steel tube is heated by pulsed laser with ambient air surrounded and it soon forms the target groove. Then, groove samples are sliced to be observed using OM and the Vickers hardness test determines these samples’ hardness values. Finally, the samples are observed and analyzed with the aids of a SEM and an EDS. The results demonstrate that the groove can be done utilizing dieless forming with pulsed laser assisted air pressure. It is notably that the average width of groove is 382.5um and the average depth is 208.5um at 10 watt power and 0.1kg/cm2 gas pressure. In conclusion, groove in micro scale can be obtained effectively by dieless forming for industrial applications.
Nowadays, groove tubes are widely used in the electronic cooling module. It is usually drawn which term refers to molding. However, there are limitations while producing the smaller ones. Therefore, this study emphasis on the parameters of dieless forming which affects the shaping of groove on stainless steel that generated by pulsed laser assisted air pressure. In this study, the performance is presented on the basis of standard atmospheric conditions. To begin with, the stainless steel tube is heated by pulsed laser with ambient air surrounded and it soon forms the target groove. Then, groove samples are sliced to be observed using OM and the Vickers hardness test determines these samples’ hardness values. Finally, the samples are observed and analyzed with the aids of a SEM and an EDS. The results demonstrate that the groove can be done utilizing dieless forming with pulsed laser assisted air pressure. It is notably that the average width of groove is 382.5um and the average depth is 208.5um at 10 watt power and 0.1kg/cm2 gas pressure. In conclusion, groove in micro scale can be obtained effectively by dieless forming for industrial applications.
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Keywords
無模成形, 氣壓成形, 雷射輔助, dieless forming, gas forming, laser assisted