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On the Study of the Optimization of Kinematic Synthesis of the Transmission Mechanism of a 8-Link Drive Press and the Co 相復山、陳照忠

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On the Study of the Optimization of Kinematic Synthesis of the Transmission Mechanism of a 8-Link Drive Press and the Co

相復山、陳照忠

E-mail: [email protected]

ABSTRACT

The linkage-drive power transmission mechanism for press mold, when compared with other types of mechanism, can provide more stable working impact load and more moderate variation of slider’s velocity. With these facts, press machine will alternately produce better product, extend fatigue lives of gears and linkages, and reduce the degree of wearing away of clutch and brake.

Because the linkage sizes of the linkage-drive press can be modified to satisfy a specific production requirement, this research is focused on the dimensional synthesis of an eight-linkage-drive press machine. In this thesis, the concepts of mechanism synthesis will be applied on the design of linkage mechanism along with numerical analysis. Various combinations of linkage sizes will be

synthesized through powerful computations. Due to more and more serious requirement on “accuracy” in industry, the clearance between mechanism members has become the key factor in this issue. Therefore, this research has also included clearance factor into the problem of dimensional synthesis. The linkage mechanism model has been built with clearances at joints in order to investigate the influence of clearance on output force and mechanical efficiency.

Keywords : Linkage-drive press ; Power transmission mechanism ; Linkage mechanism ; Clearance Table of Contents

封面內頁 簽名頁 授權書………. iii 中文摘要………

………. iv 英文摘要………. v 誌謝………

………. vi 目錄………. vii 圖目錄………

………. ix 表目錄………. xii 第一章 緒論 1 1.1 簡介………

……….. 1 1.2相關文獻……….………. 3 1.3 研究目的……….. 6 第二章 連桿組的精準點 7 2.1簡介……….………...……….…….. 7 2.2 連桿組之精準點………...…………..…

7 2.3 四連桿函數產生之精準………. 9 2.4曲柄滑塊函數產生之精準點……….…... 12 2.5四連桿組路徑與運動 產生之精準點…… 16 2.6曲柄滑塊運動與路徑產生之精準點…….. 20 2.7六連桿之精確點……….. 28 2.8八連 桿組之精確點……….. 48 第三章 八連桿驅動式沖床傳動機構尺寸合成 61 3.1 EBS4-500之分類………….……

………. 61 3.2機構之自由度分析……….. 62 3.2.1 EBS4-500之運動鍊分析……… 64 3.3合成 之探討……… 65 3.4八連桿尺寸合成……… 65 3.4.1牛頓-拉福生數值法的原理……

……… 67 3.4.2合成之驗證……… 72 3.4.3契皮雪夫間隔……….………….. 74 第四章 接頭間隙的影 響 82 4.1 簡介………...……… 82 4.2 有間隙迴轉接頭之運動模式…...…..………….. 82 4.3 桿件受 力分析……….……….. 87 4.4 等效間隙連桿……….. 95 4.4.1 間隙對滑塊位置之影響…

……… 98 4.4.2間隙對機械利益之影響……… 101 第五章 結論 104 5.1 結論……..……….……

………. 104 5.2 建議………..……….….. 105 參考文獻……….…

106

REFERENCES

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參考文獻

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