共查询到19条相似文献,搜索用时 359 毫秒
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针对国内某厂厚板轧机出现轧制力偏差的实际情况,研究了轧机两侧刚度差对轧制力偏差的影响。建立了支撑辊标高调整时候阶梯垫上面残留氧化铁皮对轧机机座刚度的影响模型,基于模型替代法建立了整体轧机有限元模型,进而通过有限元模拟计算出轧机机座刚度差引起的轧辊挠度改变量、出口厚度变化量、辊间压力变化量以及轧机两侧轧制力的偏差。结果表明:当氧化铁皮的厚度为5mm残余面积分别为26.66%、36.79%和46.92%时,氧化铁皮的等效刚度变化范围为[605,674]kN/mm。当轧机上下无刚度差时,轧机两侧轧制力偏差最小,偏差为5t;当压入的残余氧化铁皮面积最多时,此时轧机两侧轧制力偏差最大,数值为30t。 相似文献
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本文分析了预应力对轧机工作机座刚度的影响,并与以往所得结论进行比较。提出预应力轧机能提高工作机座的刚度,但不是200%,而是小于50%。并提出了以往分析中的缺陷。 相似文献
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通过对轧机工作机座受力零部件变形的分析,认为采用轧辊辊环预压紧和轧辊轴承座间设置预紧装置的双环预应力法,可使工作机座完全预应力化,最大限度地提高工作机座的刚度。本文介绍了双环预应力法的工作原理、预应力工作机座的受力状态及其复合刚度。最后以实测结果进行验证。 相似文献
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1 改造前后概况 三辊型钢开坯可逆式轧机及三辊劳特式中板轧机目前仍是中、小型轧钢厂的主力设备。然而,对于直径在φ500以上的轧机其主传动联接机座的固定却是一个颇花代价的事情。在一般设计中,都是用一个地脚轨将联接机座安装在其上,但对φ650以上的大型可 相似文献
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本文介绍用于棒线材轧机的新型三辊式机座。机座无伞齿轮且三根辊轴是单独驱动的。任何直径序列和最小批量都可轧制,可以不调换孔型或机座轧制分级很细的直径。 相似文献
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Knowledge of the reactions of the roll gap according to variable gap geometry, especially of the roll force as a function of vertical displacement of the work rolls, is required to calculate the oscillatory behaviour of the roll stand. The basic equations describing the pressure distribution in the roll gap with variable geometry are formulated using the methods of continuum mechanics. The flattening of the work rolls is taken into account by using Hitchcock's formula. Exemplary calculations show that during vibration the tension between the stands can vanish or the neutral point can surpass the roll gap exit. Both effects may result in tearing the strip at the entry of the affected mill stand. 相似文献
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In order to lucubrate the rolling characteristic of the two stands reversible cold rolling mill and establish the tension and thickness control strategy, the steady-state characteristic simulating program was established using the steady-state continuous rolling theory. The influences of each factor on exit thickness under different tension control methods were analyzed. The results show that, the influence of the entry stand gap on exit thickness is significant and it changes little with different tension control methods. As a result, the entry stand gap can be used as the main control method of exit thickness, whereas rolling speed of any stand and roll gap of the exit stand can be used to adjust the inter-stand tension. The results are beneficial for thickness and tension control of the two stands reversible cold rolling mill. 相似文献
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综合考虑了对轧机刚度影响的各主要因素,分别对550短应力线轧机刚度与550牌坊轧机刚度进行了计算。通过计算结果,可以看出,跟牌坊轧机相比,短应力线轧机在刚度上具有较大优势。 相似文献
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Shapemathematicalmodelformeasuringandcontrolling ,analyticaltheoryforshapestiffnessandthelawofcoordinationcontrolforshapeandgaugearecalledShapeMeterMethod (SMM ) .Thestudyofshapetheoryandtechnologyhasbecomethekeyissueinrollingtechnologyinrecent 4 0 years .T… 相似文献
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介绍了三辊内传动和外传动两种型式定径机轧辊机架的辊缝、齿侧间隙和轴承游隙的调整设计及装配方法,分析了影响安装调整的关键尺寸公差的控制,为三辊定径机轧辊机架的设计提供了参考. 相似文献