滚丝轮端面牙型收尾工艺设计

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1、题目滚丝轮端面牙型收尾工艺设计学生姓名学号所在学院专业班级指导教师________完成地点年月日滚丝轮端面牙型收尾装置设计[摘要]：近年来螺纹冷滚压工艺与设备因其高效、低耗、高强度和高精度等优点在国内外快速发展，但是目前国内外在螺纹件冷滚压精密成形的工艺与理论方面的研究较少，现在生产基本上是依靠经验，或用试验法来确定，这是不科学也不精确的，造成了很大的浪费。本文对螺纹件冷滚压过程及原理进行了分析，将螺纹的滚压过程根据滚丝轮的进给量分为了四个阶段，并对每个阶段的滚压力及压下量进行了分析。首次提出进给量对滚压力的影响，滚压力随进给量的增大而增大。运用塑性变形时的体积不变原理求解了坯件的

2、外径。对螺纹滚压时的径向、切向、轴向滚压力及其关系进行了分析，得出其相应的关系式。对滚压螺纹件的刀具滚丝轮进行了研究，分析了它与其它滚压方式的不同，并对现行的加工滚丝轮的收尾方法进行了研究，通过分析比较，设计了一套新型的关于滚丝轮端面牙型收尾的装置，使其生产效率大大提高。本课题的研究为进一步研究螺纹冷滚压工艺和螺纹冷滚压生产提供了理论依据，具有理论价值和现实意义。[关键词]：螺纹冷滚压Abstract：Inrecentyears,thethreadcoldrollingtechnologywasrapidlydevelopedduetoitshighefficiency,lowco

3、standperfectpropertiesofitsproduction.Butfewstudieswerecarriedoutonthetechnologicaltheoryandthemechanicalanalysisofthepreciseforming.Especiallyforhollowparts,becausethewallthicknesswasdeterminedbytheempiricalortrialanderrormethods,theproductionwasunscientificandinaccurate,whichresultedinseriou

4、swasteofmaterials.Inthispaper,thecoldthreadrollingprocessandtheorywereanalyzed.Therollingprocesswasdividedintofourstagesaccordingtotheamountoffeedofthethreadrollingdies.Therollingforceandtheamountoffeedindifferentstagewereanalyzed.Theeffectoftheamountoffeedontherollingforcewasputforwardforthef

5、irsttime.Itwasprovedthattherollingforcewouldincreasewiththeincreaseoftheamountoffeed.Theoutsidediameteroftheblankwasresolvedaccordingtotheprinciplethatvolumewasinvariableintheplasticdeformation.Byanalyzingtherelationoftheradialrollingforce,thetangentrollingforceandtheaxialrollingforce,therelat

6、ionformulaewereobtained.Therollingformingofthehollowpartsandthedifferencebetweenthesolidpartsandhollowpartswereresearched.Theminimumwallthicknessesweresolvedandtheirformulaewerededucedbysolvingthestaticundeterminedstructure.Itcanbeconcludedfromtheresultthatthree-dierollingwasmoresuitableforhol

7、lowworkpiecethantwo-dierolling.Thethreadpartswiththinnerwallthicknesscouldberolledwiththreethreaddies.Theconclusionprovidesthetheoreticalbasisforthefurtherresearchofthecoldrollingtechnologyandpracticaloperation.Ithasatheoreticalsignific