轧辊产生弹性压扁时可能轧制的板厚。在一定轧机上轧制一定的产品时，随着板带的逐渐变薄，压下越来越困难。当板带薄至某一限度后，不管如何旋紧压下螺丝或加大液压压下的压力，不管反复轧制多少道，由于轧辊产生弹性压扁而不可能再使产品变薄。(2)semihardroll:thehardnessoftheShawisabout40to60。这一极限厚度称为可轧厚度。The***allestplatethicknessmayberolledwhentherollproduceselasticsquash.Whenacertainproductisrolledonacertainrollingmill,withthegradualthinningofthestrip,itisbecomingmoreandmoredifficulttopressdown.Whenthestripisthintoacertainlimit,nomatterhowtotightendownthescreworincreasethepressureofhydraulicpressure,nomatterhowmanyrollsarerepeatedlyrolled,itisfortheproducttobecomethinduetotheelasticflatteningoftheroll.Thislimitthicknessiscalledtheminimumrollingthickness.冷轧板带轧辊的辊身呈微凸，当它受力弯曲时可保证良好扳形；型钢轧机轧辊的辊身上有轧槽，根据型钢轧制工艺要求，安排孔型。钢管轧制中采用斜轧原理轧制的轧辊有圆锥形、腰鼓形或盘形。Therollbodyofthecoldrolledstriprollerisslightlyconvex.Whenitisbentbyforce,itcanensuregoodshape.Therearegroovesontherollerbodyofthesectionmillroll,andthepassisarrangedaccordingtotherollingrequirementsofsectionsteel.Therollersofskewrollingrollingrollingprincipleofconicaldrumordisc.轧辊在制作和运用前的预备工序中会发生剩余应力和热应力。运用时又进一步遭到了各种周期应力的效果,包含有曲折、改变、剪力、接触应力和热应力等。Residualstressesandthermalstresseswilloccurinthepreparatoryprocessbeforemakingandapplyingrolls.Whenapplied,itisfurtheraffectedbyvariouscyclicstresses,includingtwists,changes,shearforces,contactstressesandthermalstresses.被轧制的钢种被轧制的钢种是选择轧辊的关键因素，其抗变形能力随坯料化学成分不同而改变，主要表现在轧制的各阶段变形的负荷大小和变化。必须根据确定的强度和硬度选择轧辊。RolledsteelTherolledsteelisthekeyfactortoselecttheroll.Itsdeformationresistancevarieswiththechemicalofthebillet.Itismainlymanifestedintheloadandchangeofdeformationineachrollingstage.Therollmustbeselectedaccordingtothedeterminedstrengthandhardness.)