PRINTINGANDDIGITALMEDIATECHNOLOGYSTUDYTol.223No.22023.04印刷与数字媒体技术研究2023年第2期（总第223期）RESEARCHPAPERS研究论文卷筒纸折页机构砍刀臂破坏分析及结构优化林玉龙，姜涵，张天浩，齐元胜*（北京印刷学院机电工程学院，北京102600）摘要本研究针对N160型卷筒纸折页机构在高速运行条件下砍刀臂根部容易损坏的问题进行了分析，建立了折页机构含微小运动副间隙的有限元动力学模型，分析发现砍刀臂结构具有足够的强度。搭建了振动测试系统，对砍刀臂根部车间作业下的实际振动情况进行测试；通过比较其工作频率和固有频率，发现在36000r/h的转速下砍刀臂结构会发生共振。通过拓扑优化，对砍刀臂的结构进行了改进，改进后的双臂桁架结构在保证了强度的同时也满足了刚度要求。最后进行了初步的车间试验，验证了新结构的合理性。关键词刀式折页机构；强度计算；约束模态；振动测试；结构优化中图分类号TH113;TH114;TS803文献标识码A文章编号2097-2474(2023)02-108-09DOI10.19370/j.cnki.cn10-1886/ts.2023.02.013DamageAnalysisandStructuralOptimizationofMacheteArmforWebFoldingMechanismLINYu-long,JIANGHan,ZHANGTian-hao,QIYuan-sheng*(SchoolofMechanicalandElectricalEngineering,BeijingInstituteofGraphicCommunication,Beijing102600,China)AbstractThisstudyinvestigatedtheproblemthatthewebfoldingmechanismwaspronetodamageattherootofthemachetearmunderhighspeedoperatingconditions.Thefinitedynamicanalysisofthefoldingmechanismwascarriedout,whichwasfoundthatthestructureofmachetearmhasenoughstrength.Avibrationtestingsystemwassetuptotesttheactualvibrationattherootofmachetearm.Bycomparingtheworkingfrequencieswiththenaturalfrequencies,itwasfoundresonancewouldoccurattherotationalspeedof36000r/h.Thestructureofthemachetearmwasimprovedbytopologyoptimization.Theimproveddouble-armtrussstructureofmachetearmensuredstrengthwhileavoidingtheresonantregionofnaturalfrequencies.Preliminaryworkshoptestwascarriedouttoverifytherationalityofthenewstructure.KeywordsKnifefoldingmechanism;Strengthcalculation;Constrainedmode;Vibrationtest;Structuraloptimization收稿日期：2022-04-14修回日期：2022-05-25*为通讯作者项目来源：国家重点研发计划(No.2019YFB1707202)；北京印刷学院博士...
