CNC工具機PES加工應用專家系統之開發與研究

The papper of this study is tried to build-up a process-oriented expert system(PES) such that the operators can easily select a block within this system according to process requirement. In this system, the process control parameters are being categorized into three main index, speed, accuracy, and surface finish with totally 16 different blocks. Here, speed means having shortest process time. Accuracy means having smallest right angle error and radius reducing error. While, surface finish means having smallest oscillating magnitude and jerk along the process contour. Taguchi method is applied to find the influence of each control parameter. According to the importance of these parameters, the parameters setting in each block on the expert system are being determined. Two three-axis machine tools A and B with SYNTEC controllers and DELTA servo systems are being used for the experiment. From the experiment results, they are found that the PES is being successful established. At the testing machine tool A, the process time for the speed setting is 1.11 s. The right angle error for the accuracy setting is 4.5 um and radius reducing error is 2.5 um. The oscillating magnitude for the surface finish is 2.1 um and the jerk is 92.7 m/s3. At the testing machine tool B, the process time for the speed setting is 2.18 s. The right angle error for the accuracy setting is 5.8 um and radius reducing error is 1.1 um. The oscillating magnitude for the surface finish is 5.7 um and the jerk is 26.2 m/s3. They are all fulfilled with the requirements.PES(Process-oriented Expert System)加工應用專家系統目的在於建立最佳參數系統，將機台、控制器、進給系統...等與加工相關的參數最佳化，並依照當前加工需求選擇最適合的參數套用，讓人員無須進行參數測試和調校，就能得到良好的加工結果。 本論文所使用的系統規畫採用SYNTEC科技公司的10系列控制器搭配台達電(delta)的驅動器馬達與工具機測試機台，因此目前專家系統先針對控制器的部分建立，將控制器中的參數找出與快準穩有直接關聯，再依照田口實驗法規劃實驗，計算出各參數對快準穩的趨勢及貢獻度，再依照此貢獻度與趨勢製作成PES加工應用專家系統，最後以實際測試機台A、B進行系統驗證並調整。 從測試機台A結果能得知：快的比例為最高的參數其加工路徑時間為1.11秒，準的比例為最高的參數其直角誤差為2.5微米、圓半徑內縮量2.5微米，穩的比例為最高的參數其路徑振盪量為2.1微米、JERK值為92.7 m/s3。 從測試機台B結果能得知：快的比例為最高的參數其加工路徑時間為2.18秒，準的比例為最高的參數其直角誤差為5.8微米、圓半徑內縮量1.1微米，穩的比例為最高的參數其路徑振盪量為5.7微米、JERK值為26.2 m/s3。致謝 I 摘要 II Abstract III 目錄 IV 圖目錄 VI 表目錄 VIII 第一章 緒論 1 1.1 研究背景 1 1.2 文獻回顧 1 1.3 研究動機與目地 4 1.4 研究方法 4 1.5 論文架構 5 第二章 CNC控制器 7 2.1 SYNTEC控制器 7 2.2 控制器的加減速規劃 7 2.3 控制器的參數 9 第三章 田口法 15 3.1 決定品質特性 15 3.2 選擇實驗因子 15 3.3 定義因子的水準數 16 3.4 選擇直交表 17 3.5 變異數分析 19 第四章 實驗分析與結果 20 4.1 實驗設備 20 4.2 實驗路徑 24 4.3 實驗分析 25 4.4 PES加工應用專家系統 27 4.5 測試機台A的實驗結果 28 4.5.1. 快的趨勢與貢獻度 30 4.5.2. 準的趨勢與貢獻度 32 4.5.3. 穩的趨勢與貢獻度 33 4.5.4. 測試機台A的PES加工應用專家系統結果 35 4.6 測試機台B的實驗結果 39 4.6.1 快的趨勢與貢獻度 41 4.6.2 準的趨勢與貢獻度 42 4.6.3 穩的趨勢與貢獻度 44 4.6.4 測試機台B的PES加工應用專家系統結果 46 4.6.5 測試機台B實際加工 51 第五章 結論與未來展望 56 5.1 結論 56 5.2 未來展望 57 參考文獻 5

Tubulin Tyrosine Ligase Like 12, a TTLL Family Member with SET- and TTL-Like Domains and Roles in Histone and Tubulin Modifications and Mitosis

Contains fulltext : 110068.pdf (publisher's version ) (Open Access)hTTLL12 is a member of the tubulin tyrosine ligase (TTL) family that is highly conserved in phylogeny. It has both SET-like and TTL-like domains, suggesting that it could have histone methylation and tubulin tyrosine ligase activities. Altered expression of hTTLL12 in human cells leads to specific changes in H4K20 trimethylation, and tubulin detyrosination, hTTLL12 does not catalyse histone methylation or tubulin tyrosination in vitro, as might be expected from the lack of critical amino acids in its SET-like and TTLL-like domains. hTTLL12 misexpression increases mitotic duration and chromosome numbers. These results suggest that hTTLL12 has non-catalytic functions related to tubulin and histone modification, which could be linked to its effects on mitosis and chromosome number stability