本文選題：平整機(jī) + 振痕��； 參考：《振動.測試與診斷》2017年01期

【摘要】：為解決某冷軋連退線平整機(jī)在平整汽車板高強(qiáng)鋼時(shí)常出現(xiàn)的表面振痕問題,對平整機(jī)輥系和傳動系統(tǒng)進(jìn)行了多輪次現(xiàn)場振動加速度測試,并進(jìn)行了時(shí)域和頻域分析。結(jié)合傳動系統(tǒng)嚙合頻率計(jì)算,認(rèn)為傳動系統(tǒng)工作不良是引起輥系振動的直接原因。建立六輥平整機(jī)機(jī)座系統(tǒng)的三維有限元模型,針對其固有特性進(jìn)行仿真,計(jì)算得到平整機(jī)易激發(fā)振動的主要頻率,通過與產(chǎn)生振痕時(shí)減速箱齒輪嚙合頻率對比,可確定減速箱齒輪的嚙合沖擊造成平整機(jī)的強(qiáng)迫振動,并引發(fā)帶鋼振痕。提出了使軋制速度避開系統(tǒng)固有頻振區(qū)的抑振對策并投入工業(yè)生產(chǎn)實(shí)踐,汽車板高強(qiáng)鋼振痕缺陷年改判量降低了近90%。
[Abstract]:In order to solve the problem of vibration marks on the surface of high strength steel in rolling automobile plate, the field vibration acceleration of roll system and transmission system of a cold rolling mill were measured and the time-domain and frequency-domain analysis were carried out. Combined with the calculation of the meshing frequency of the transmission system, it is considered that the poor working of the transmission system is the direct cause of the roll system vibration. The three-dimensional finite element model of the six-roll flatting machine stand system is established. The main frequency of the easily excited vibration of the flat mill is calculated by simulation according to its inherent characteristics. The meshing frequency of the gear of the reducer is compared with that of the reducer gear when the vibration mark is produced. It can be determined that the meshing impact of the gear of the reducer causes the forced vibration of the flat mill and causes the strip vibration mark. The anti-vibration countermeasures for rolling speed to avoid the natural frequency region of the system are put forward and put into industrial production. The annual correction of vibration mark defects of high-strength steel for automobile plate is reduced by nearly 90%.
【作者單位】： 北京科技大學(xué)機(jī)械工程學(xué)院;北京航天時(shí)代光電科技有限公司;武漢鋼鐵股份有限公司;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51175035)
【分類號】：TG333

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