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加工中心冷卻系統(tǒng)故障模式危害性模糊評價分析
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    摘要:

    加工中心冷卻系統(tǒng)的故障信息常常具有很強的模糊性。常規(guī)故障模式影響與危害度分析方法由于僅考慮故障發(fā)生頻率和嚴(yán)重程度,，當(dāng)考慮故障檢測和維修難易程度時,，難以給出有效而準(zhǔn)確的分析結(jié)果。因此提出應(yīng)用模糊綜合評判方法進(jìn)行危害度分析,。綜合考慮了故障發(fā)生概率,、故障嚴(yán)重程度、測試性和維修性等因素,，將定性問題進(jìn)行定量分析,，以某加工中心冷卻系統(tǒng)為例，計算出冷卻系統(tǒng)故障模式危害度,，并以此作為判斷可靠性改進(jìn)方向的依據(jù),。結(jié)果表明，液,、氣,、油堵塞故障模式的危害性最大,與實際相符。

    Abstract:

    The failure information of the cooling system of machining center is fuzzy frequently. The normal analysis method of failure mode critically only considers the failure probability and serious degree. When the testing and the maintainability of failure are considered, the failure mode criticality can not be accurately analyzed by FMECA. The fuzzy theory was proposed to analyze the failure mode criticality. It comprehensively included the failure probability, the failure serious degree, the testing and the maintainability of failure, which could carried out the qualitative question quantitatively. The failure mode criticality of cooling system of a machining center was calculated to determine the direction of improving reliability. The results showed that the criticality of jam stem was serious, which was consistent with the facts.

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王桂萍,賈亞洲,申桂香,張日明.加工中心冷卻系統(tǒng)故障模式危害性模糊評價分析[J].農(nóng)業(yè)機械學(xué)報,2008,39(3):171-174.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(3):171-174.

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