- 學位論文
三次元量測儀結構分析與改善量測品質
The Structure Analysis and Improvement of the Measurement Quality of the Coordinate Measuring Machine
摘要
摘要 國際通用三次元測量儀在精密工件尺寸量測領域中，扮演一個品質把關的重要角色。目前國內對於精密量測方面，產業界最常使用的量測儀器為三次元測量儀(Coordinate Measuring Machine；CMM)，三次元測量儀在安裝及後續使用期間，須定期對系統的精度進行校正與補償，才能確保其應有的量測品質，精密量測需要高精度的設備且充分發揮量測功能，可精確量測出尺寸及形狀，以提升品質及確保產品良率。進行量測工作時，量床所產生幾何的誤差，主要是來自量床本身結構剛性以及空間位置運動，因此提高機台精度及剛性的性能需求，其結構設計必須有足夠的剛性，良好的量床結構有更好的動態特性，满足高精度的要求， 尺寸檢驗必須兼顧「穩定、準確、迅速」為目標。 本次研究為試驗參數水準選擇田口方法來驗證，以精進接觸式三次元測量儀的量測品質。首先透過小標準環規(25 mm)、中標準環規(85 mm)、大標準環規(125 mm)做為量測樣本做為量測樣本，尋找出主要的影響因子，控制因子有移動速度、掃描速度、桿長、温度等參數，干擾因子有預碰距離與返回距離等二項，再使用田口方法設計參數，進行規劃、執行實驗、分析及資料收集，最後決定最佳參數水準組合；再經過實驗結論之再現性確認。經由個案分析獲得了較佳之參數水準組合，更有效提升產品量測品質。
並列摘要
ABSTRACT International universal triple measuring bed plays an important role in the field of precision workpiece size measurement.At present, the domestic precision measurement, the industry's most commonly used measuringinstruments for Coordinate Measuring Machine (CMM). During the installation and subsequent use of the CMM, the accuracy of the system must be calibrated and compensated regularly to ensure its proper measurement quality. Precision measurement requires high-precision equipment and full use of the measurement function to accurately measure size and shape to improve quality and ensure product yield. When performing measurement work, the geometric error generated by the measuring bed mainly comes from the structural rigidity of the measuring bed itself and the movement of the spatial position. Therefore, to improve the performance requirements of the accuracy and rigidity of the machine, its structural design must have sufficient rigidity and good quality. The bed structure has better dynamic characteristics and meets the requirements of high precision. The dimensional inspection must take into account the goals of "stability, accuracy and speed". In this study, the Taguchi method was selected for the test parameter level to verify, so as to improve the measurement quality of the contact Coordinate Measuring Machine. Firstly, the small standard ring gauge (25 mm), the medium standard ring gauge (85 mm), and the large standard ring gauge (125 mm) are used as measurement samples to find out the main influencing factors, and the control factors have shifted. Parameters such as speed, scanning speed, rod length, temperature, etc., interference factors include two items such as pre-collision distance and return distance, and then use the Taguchi method to design parameters, plan, execute experiments, analyze and collect data, and finally determine the best combination of parameter levels ; Then confirm the reproducibility of the experimental conclusion. Through case analysis, a better combination of parameter levels has been obtained, which can effectively improve the quality of product measurement.