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时间:2020-05-01
《冷轧过程中组合式支承辊与整体式支承辊性能的比较.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第2O卷第4期塑性工程学报Vo1.2ONO.42013年8月JOURNALOFPLASTICITYENGINEERINGAug.2013doi:10.3969/j.issn.1007—2012.2013.04.011冷轧过程中组合式支承辊与整体式支承辊性能的比较(燕山大学机械工程学院,秦皇岛066004)董永刚苏玉龙朱志安摘要:为比较四辊冷轧条件下热装组合式支承辊与整体式支承辊的工作性能,将辊套和辊芯进行分段离散,根据工作辊、辊套及辊芯之间的变形协调以及力平衡条件,采用影响函数法基于C语言编程求解组合式支承辊弹性压扁、辊间压力及出口前张力横向分
2、布,研究弯辊力以及窜辊量对组合式支承辊性能的影响,并将其与相同轧制工艺参数条件下的整体式支承辊性能进行比较。结果表明,相同条件下,组合式支承辊的辊间压扁量比整体式支承辊的辊间压扁量减少6以上,组合式支承辊辊身边部与中部的辊间压力差值比整体式支承辊边部和中部辊间压力差值大0.2kN/mm左右;但当弯辊力及窜辊量较大时,组合式支承辊出口前张力边部与中部差值明显大于整体式支承辊出口前张力边部与中部差值。关键词:支承辊;挠度;辊间压扁;出口前张力中图分类号:TG335.4文献标识码:A文章编号:1007—2012(2013)04—0053—06Acom
3、parativestudyofperformancebetweenthecompositeback—uprollandthesolidback--uprollduringcold-’striprollingIX)NGYong-gangSUYu-longZHUZhi—an(CollegeofMechanicalEngineering,YanshanUniversity,Qinhuangdao066004China)Abstract:Forcomparingtheworkingperformanceofcompositeback-uprollwit
4、hthatofsolidback-uproll,therollsleeveandrollmandrewasdiscretedsegmentbysegmentfirstly,thentheforceequilibrimfunctionandthedeformationcompatibilityfunc—tionbetweentherollsleeve,rollmandrelandWOrkingrol1wereproposed.Moreover,thesolutionmatrixwaslistedandthesol—vingprogramwasco
5、mpiledonthebaseofinfluencingfunctionmethodtOsolvetheelasticflattening,pressurebetweenrollsandexitforwardtensionofcompositeback-uproll,andtheinfluenceofdifferentbendingforceandcrossslidingvalueonthecompos—iteback-uprollwasstudied.Theresearchresultsindicatethatthevalueofelasti
6、cflatteningofcompositeback-uprollisreducedmorethan6comparedwiththatofsolidback-uproll,andthedifferenceofcontactpressurebetweentheedgeofrollandthemiddleofrollisabout0.2kN/mm.Moreover,ifthevalueofbendingforceorcrossslidingarebigenough,thedifferenceofexitforwardtensionofcomposi
7、teback-uprollbetweentheedgeofrollandthemiddleofrollisgreaterthanthatofsolidback-uprollbetweentheedgeofrollandthemiddleofrol1.Keywords:supportingroo1;deflection;pressurebetweenrolls;exitforwardtension轧支承辊的辊耗非常大。热装组合式支承辊由辊套引言和辊芯热装配产生的装配应力来保证辊套和辊芯表面有效结合,磨辊时单独磨削辊套,磨削量达到一目前国内冷轧支承
8、辊普遍使用整体铸造或整体定值时只需更换辊套,辊芯不用频繁更换,可重复锻造方法制造,支承辊经过数次磨削后因轧辊直径多次使用,因此可以大大降低辊耗并延长换
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