目前國內汽車產業相關零配件的大多依循國際汽車特別工作小組(International Automotive Task Force, IATF)所發行的汽車產業品質管理系統要求，IATF 16949採用美國汽車工業行動協會(Automotive Industry Action Group, AIAG)所提出的量測系統分析(Measurement System Analysis, MSA)作為五大分析工具之一，MSA為國際公認標準並用來執行量測系統的可接受性的一套標準做法與程序。本研究藉由建構「即時彈簧裝置夾量測系統」，以符合制動帶的熱壓製程需求，將即時量測導入，能快速找出有問題的彈簧裝置夾，避免不良制動帶出廠後被客訴或退貨的風險。
本研究選定汽車變速箱中的零件制動帶「熱壓製程」中使用關鍵壓縮荷重參數來進行量測，而壓縮荷重產生的來源就是彈簧裝置夾。選用雷射測距感測器偵測彈簧裝置夾壓縮之位移量變化，來替代萬能量測系統中的絕對位置回授。利用設定彈簧常數k值，並搭配虎克定律來建構即時彈簧裝置夾量測系統。
應用量測系統分析進行萬能量測系統與彈簧裝置夾量測系統來分析，經%GR&R、NC與P⁄T評估後判定彈簧裝置夾量測系統合格且符合MSA要求，再由彈簧常數k比較兩種系統重差異為何，其研究結果彈簧裝置夾量測系統與萬能量測系統數值最大上誤差率約9.59%，最大下誤差率約-5.60%，且量測時間提升8倍，若每年量測10,000支，預估年省NT$437,500，另外改善了萬能量測系統五個缺點，又新增三個功能，制定彈簧裝置夾管制流程，協助現場管理人員調整的參考與方向，有效避免不良品流出，免除客戶投訴，提升制動帶熱壓製程穩定度及良率提升。

Most automotive industry for parts and accessories in Taiwan follows the regulations for quality control issued by International Automotive Task Force (IATF). The IATF 16949 standard adopts Automotive Industry Action Group’s Measurement System Analysis (MSA) as one of its measurement tools. MSA is an international standard, and a standard procedure for measuring system acceptability. This study designs a real-time measuring system for spring fixture to meet band’s production mode. By bringing in the real-time measuring system, problematic spring fixtures could be quickly detected, and thus reduces the risk of customer complaints or return of dysfunctional hot pressing brake band.
This study investigates brake band during hot pressing process and measure the compression load parameters, which originates from spring fixture. The displacement of spring fixtures is measured by laser rangefinder, in place of universal measuring machine. By setting the spring constant k value, and combining with Hook’ Law to design a real-time measuring system for spring fixtures.
Using MSA to compare measurements of universal measuring machine with that of the real-time measuring system. Statistical evaluations confirm that the real-time measuring system meets IATF 16949’s MSA requirements. By comparing spring constant k of both systems, the results showed that upper tolerance is 9.59% and lower tolerance is -5.60%, and measuring time speeds up 8 times for the real-time measuring system. For 10,000 measurements, we could save up to 437,500 NT per year. This study concluded that real-time measuring system can reduce dysfunctional products and customer complaints, and also can improve manufacturing stability and product yield.

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