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1、http://www.sddlgs.comhttp://www.sdttgs.comhttp://www.tahjhg.comhttp://www.jxynj.com卷板预弯工艺的对中操作介绍Threebendingprocess1卷板由预弯(压头)、对中和卷弯三个过程组成。1rollplatebybending(head),androllbendingofthreeprocess.2预弯(压头)在三棍卷板机或预弯压力机上进行。当预弯板厚不超过20mm的情况下,可采用预弯也一块钢板作为弯模,其厚度不应大于板厚的两倍,长度应比板略长,将弯曲模放入辊筒中,将板料置于弯模上,压下上辊并使弯模来
2、回滚动使板料边缘达到所要求的弯曲半径。同时采用弯模预弯时,必须控制弯曲功率不超过设备能力60%,操作时应严格控制上辊的压下量,以防过载损坏设备。在压力机上用模具预弯适用于各种板厚,用长度比板料短的通用模具,预弯时必须分段进行,预弯两端,预弯尺寸根据工件卷圆卷板机种类而定。如20*2000卷板机端面预弯尺寸是250-300;8*2000卷板机端面预弯尺寸是150-200。2bending(pressurehead)inthreestickmachineorbendingmachine.Whenbendingthicknessundertheconditionoflessthan20mm,b
3、endingcanbeusedalsoasasteelplatebendingdie,itsthicknessshouldnotbehttp://www.sddlgs.comhttp://www.sdttgs.comhttp://www.tahjhg.comhttp://www.jxynj.comgreaterthantwicethethickness,lengthshouldbeslightlylongerthantheboard,thebendingdieisputintotheroller,putssheetmetalbendingmold,pressurerollerandthe
4、bendingmodulusbackandforthrollingsheetedgetoachievetherequiredbendingradius.Usingcurvedbendingmouldatthesametime,mustcontrolbendingpowerequipmentcapacityby60%,notmorethanoperationshouldstrictlycontroltherollreduction,incaseofoverloaddamagetheequipment.Inpresseswithbendingmouldissuitableforvarious
5、thickness,withageneralmoldlengthshorterthansheetmetal,andmustbesegmentswhenbending,bending,bendingthesizeaccordingtothetypeofworkpiece,rollroundmachine.Suchas20*2000rollsendbendingsizeis250-300;8*2000bendingrollendbendingsizeis150-200.3对中,将预弯的板料置于卷板机上滚弯时,为防止产生扭曲将板料对中,要使板料的纵向中心线与辊筒轴线保持平行。对中方法有几种:3
6、on,bendingsheetmetalinrollonrollhttp://www.sddlgs.comhttp://www.sdttgs.comhttp://www.tahjhg.comhttp://www.jxynj.combendingmachine,inordertopreventtoproducedistortioninthesheetwillbeto,tomakethesheetmetaloflongitudinalcenterlineremainparalleltotherollaxis.Thereareseveralwaysforthe:(1)在三辊卷板机上利用挡板使板
7、边靠紧挡板;(1)onthethree-rollerplateusingbaffleplateedgebytightdamper;(2)将板料抬起使板边靠紧侧辊,然后再放平;(2)thesheetuptomaketheedgewillbetightsideroller,andthenflat;(3)把板料对准侧下辊的直槽;(3)rollunderthesheetmetalonthesideofthestraightgroove;(4