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機架的設計步驟

2014-08-18 19:11 作者:管理員14 來源:未知 瀏覽: 字號:

摘要:1)初步確定機架的形狀和尺寸

    1)初步確定機架的形狀和尺寸     機架的結構形狀和尺寸,取決于安裝在它內部與外部的零件和部件的形狀與尺寸,配置情況、安裝與拆卸等要求。同時也取決于工藝、所承受的載荷、運動等情況。然后,綜合上述情況,利用經驗公式或有關資料提供的經驗數據,同時結合設計人員的經驗,并參考現有同類型機架,初步擬定出機架的結構形狀和尺寸。
    2)常規計算    常規計算是利用材料力學、彈性力學等固體力學理論和計算公式,對機架進行強度、剛度和穩定性等方面的校核,而后修改設計,以滿足設計要求。
    常規計算方法比較方便直觀,適用于一般用途的機架。對于重要的機架或結構復雜、受力復雜的機架可不進行常規計算,直接按第3)步驟進行計算。
   3)有限元靜態分析、模型試驗(或實物試驗)和優化設計    求得其靜態和動態特性,并據此對設計進行修改或對幾個方案進行對比,選擇最佳方案。
   4)制造工藝性和經濟性分析。
    最后,還要對機架進行造型設計,以求得內外質量的統一性。 (責任編輯:laugh521521)
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