The Research and Development of Web Thickness Measuring Methods and Systems for Undercut Type Microdrills

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Project title

Code/計畫編號

NSC101-2218-E019-003

Translated Name/計畫中文名

過切型鑽針之芯厚量測方法與系統的研究開發

Project Coordinator/計畫主持人

Wen-Tung Chang

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Mechanical and Mechatronic Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=2595965

Year

2012

Start date/計畫起

01-08-2012

Expected Completion/計畫迄

01-07-2013

Bugetid/研究經費

603千元

ResearchField/研究領域

自動化工程(工)
電子電機工程
機械工程

"臺灣為全球印刷電路板之生產重鎮。印刷電路板相關產業目前為國內重要的經濟支柱之一。在印刷電路板的相關製程中，常需要進行鑽孔作業，以產生孔徑為0.075～0.45 mm 不等的微孔。在目前印刷電路板產業所採用的鑽孔技術中，機械鑽孔仍佔相當大的比重。機械鑽孔的原理乃是使用高速旋轉的微型鑽針對印刷電路板的材料進行切削而形成微孔。業界通用之微型鑽針可區分為標準型、過切型與反向型等三大類。過切型鑽針的特點在於其在鑽孔的過程中可以有效地減少鑽針與孔壁之間的接觸面積，以降低鑽孔時的熱量並改善孔壁品質，因此特別適用於多層板的鑽孔作業。對於外徑為0.2 mm 以下的鑽針而言，過切型鑽針已逐漸成為市場上的主流。　　鑽芯為鑽針之鑽部中未被開槽的核心部分，其厚度與鑽槽深度在設計上互為衝突。芯厚值較大的鑽針具有較佳的剛性，但其鑽槽深度較小，使得排屑效果較差；反之，鑽槽深度較大者則具有較佳的排屑效果，但其剛性較差。因此，芯厚的設計值是影響鑽針性能與耐用性的重要關鍵參數之一。針對過切型鑽針成品的芯厚值進行量測以改善製程參數是鑽針製造廠目前所關切的重要品管檢測工作之一，開發過切型鑽針的芯厚量測方法與系統有其絕對的必要性。　　本計畫的目的在於針對過切型鑽針研發其芯厚值量測方法與系統。本計畫預定以兩年完成研發目標。第一年將針對「破壞式芯厚值量測自動化系統」的硬體架構進行設計與製作，並開發相關的芯厚值量測理論方法，然後進行系統整合與開發其自動化量測程序，並進行實際的破壞式芯厚值量測實驗。第二年將針對「非破壞式芯厚值量測自動化系統」的硬體架構進行設計，並開發相關的芯厚值量測理論方法，然後進行系統整合與開發其自動化量測程序，並進行實際的非破壞式芯厚值量測實驗。最後會針對兩套系統的量測精度與重現性進行比較與驗證。" "Taiwan is one of the key production bases for printed circuit boards (PCBs) in the world. PCB and related industries are now important parts of economic pillars of Taiwan. In the manufacturing processes of PCBs, drilling operations are frequently adopted to produce microholes (or microvias) of diameters ranging between 0.075 to 0.45 mm. Mechanical drilling presently plays an important role in the drilling technologies adopted by the PCB industry. The principle of mechanical drilling is to use microdrills rotating with ultra-high speed to perform cutting action on PCBs and to form microholes. Microdrills can be classified by three types: standard type (or straight type) drill, undercut type drill and inverse drill. The characteristic of an undercut type microdrill is that it can effetely reduce the contact area between the drill and the hole, thus can achieve lower heat and a better hole quality. Therefore, undercut type microdrills are especially suitable for the drilling operation for multilayer PCBs. For microdrill products of diameters below 0.2 mm, undercut type microdrills progressively become the mainstream in the market. The web is the core portion of the drill body of a microdrill without fluted. From a design viewpoint, the web thickness conflicts with the depths of the helical flutes. A microdrill with a larger web thickness can have better rigidity, but its flute depths will be smaller and thus leads to poor chip removal ability, and vice versa. Therefore, the design value of the web thickness is one of the critical parameters that influences the performance and reliability of a microdrill. The web thickness measurement of undercut type microdrills for improving their manufacturing processes is one of the important quality control tasks concerned by microdrill manufacturers. Hence, the development of web thickness measuring methods and systems for undercut type microdrills is quite necessary for the microdrill industry. The purpose of this project is to develop web thickness measuring methods and systems for undercut type microdrills. The term of the project is two years. In the first year, a “destructive type web thickness measuring system” will be designed and constructed, and its corresponding theoretical measuring method and automated measuring processes will be developed. Experiments for the destructive web thickness measurement will also be conducted. In the second year, a “non-destructive type web thickness measuring system” will be designed and constructed, and its corresponding theoretical measuring method and automated measuring processes will be developed. Experiments for the non-destructive web thickness measurement will also be conducted. Finally, comparisons between the two developed systems will be carried out to test their measuring accuracy and repeatability."

Keyword(s)

微型鑽針
過切型鑽針
芯厚
破壞式量測
非破壞式量測
機器視覺
雷射量測
自動化量測系統
自動化光學檢測
Microdrill
Undercut type microdrill
Web thickness
Destructive measurement
Non-destructive measurement
Machine vision
Laser measurement
Automated measuring system
Automated optical inspection

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The Research and Development of Web Thickness Measuring Methods and Systems for Undercut Type Microdrills

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