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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/35365

    Title: 以表面鍍層延長碳化鎢鑽針壽命之研究
    Other Titles: Study of improving the tool life of WC drill by various protective coatings
    Authors: 林育靖;Lin, Yu-ching
    Contributors: 淡江大學機械與機電工程學系碩士班
    趙崇禮;Chao, Choung-lii
    Keywords: 鑽針;表面鍍層;非平衡磁控濺鍍法;磨耗;壽命;drill;coating;unbalanced magnetron sputtering;wear;tool life
    Date: 2007
    Issue Date: 2010-01-11 06:26:34 (UTC+8)
    Abstract: 近年來機電產品朝向微小化、多樣性和大量生產的方向發展。隨著鑽孔微小化,印刷電路板上的鑽孔將是高密度分佈和高深寬比,鑽孔製程的費用勢必提高,因此在成本的考量下,如何提高鑽針壽命及鑽孔品質將是一個重要的研究課題。本文使用非平衡磁控濺鍍法在碳化鎢鑽針上鍍上硬質膜,藉由表面鍍層的方式提高鑽針耐磨耗性和潤滑性,以達到提高鑽針壽命和鑽孔品質的目標。實驗採用直徑0.3mm鑽針,轉速155Krpm,進給率3.5m/min,疊合2個雙面銅箔電路板鑽100-11000孔,最後用場發射電子顯微鏡觀察鑽針與鑽孔的情形。實驗結果發現,鑽針主要受到摩擦磨耗和黏著磨耗影響,而產生磨耗的位置主要在鑿刃和切刃外側邊二個地方,因為鑿刃是最先接觸材料並承受切削力,因而產生磨耗;切刃外側邊則是產生最大切削速度的位置,磨耗會隨著切削速度增加而增加。本研究實驗結果顯示,未鍍膜鑽針的壽命在1500-2000孔左右,其鑽孔在500孔後產生嚴重變形。氧化鋁鈦鍍膜(厚度0.5μm)鑽針鑽到11000孔時,以電子顯微鏡觀察發現鑿刃和切刃外側邊只產生些微磨耗,與未鍍膜鑽針相比明顯提高五倍的壽命;就PCB鑽孔而言,其鑽孔比起未鍍膜鑽針所鑽的孔明顯要改善許多,鑽孔並未產生嚴重變形,鑽孔壁也相當平滑。
    As the trend of industrial is fast moving towards miniaturization, diversity, high efficiency and high throughput, the devices to be mounted onto a PCB are increasingly densely packed so are the holes needed to keep all elements in place. To effectively and economically generate so many holes of small diameter and high aspect ratio, the drilling process has to be done in a high speed manner and the tool life has to be kept as long as possible. This study aimed to improve the tool life and the quality of the obtained holes by applying various hard coatings on the drills. The results showed that tool life could be effectively improved from 2500 hits to around 11000 hits at 155Krpm and 3.5m/min when proper hard coating was applied. It was found that wear of drill was resulted mainly from abrasive wear and adhesion wear. It was also showed in the research that while non-coated drills suffered serious deformation after 500 hits those coated with TixAl2O3 could finish 11000 hits with very limited wear land on the drills.
    Appears in Collections:[Graduate Institute & Department of Mechanical and Electro-Mechanical Engineering] Thesis

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