JB36--400型闭式双点压力机曲轴断裂失效分析及机械性能强化的开题报告摘要：随着工业化和现代化的不断发展，压力机作为重要的机械设备，在工业生产中所占的地位日益重要。但是，随着压力机的不断升级，其复杂性和性能要求也在不断提高。因此，在使用过程中，压力机的失效问题也越来越受到关注。本文以JB36--400型闭式双点压力机曲轴断裂失效为研究对象，旨在分析其失效原因，并提出机械性能强化的方案。本文首先介绍了压力机的基本概念和工作原理，然后简要介绍了现有的同类压力机的技术水平和发展趋势。接着，针对JB36—400型闭式双点压力机曲轴断裂失效的现象，深入分析了其失效原因，主要包括材料缺陷和工艺问题两个方面。为了弥补在材料和工艺方面的缺陷，本文提出了机械性能强化的方案。具体来说，包括以下两个方面：一是改进材料选择，选用更优质的材料，提高材料的强度和韧性等机械性能；二是改进工艺流程，优化加工方式，严格控制加工参数等，提高加工质量和精度。通过以上分析和方案的制定，本文旨在为JB36—400型闭式双点压力机曲轴断裂失效问题的解决提供一定的参考和帮助。关键词：压力机；失效分析；机械性能强化Abstract:Withthecontinuousdevelopmentofindustrializationandmodernization,theimportanceofpressmachineasanimportantmechanicalequipmentinindustrialproductionisincreasing.However,asthepressmachinecontinuestoupgrade,itscomplexityandperformancerequirementsarealsoincreasing.Therefore,thefailureproblemofpressmachinehasbeenpaidmoreandmoreattention.ThispapertakestheJB36-400typecloseddoublepointpressmachinecrankshaftfracturefailureastheresearchobject,aimstoanalyzethecauseoffailure,andputforwardtheschemeofmechanicalperformanceenhancement.Thispaperfirstintroducesthebasicconceptandworkingprincipleofthepressmachine,andthenbrieflyintroducesthetechnicallevelanddevelopmenttrendoftheexistingsimilarpressmachines.Then,aimingatthephenomenonofJB36-400typecloseddoublepointpressmachinecrankshaftfracturefailure,thefailurereasonsareanalyzedindepth,mainlyincludingmaterialdefectsandprocessproblems.Inordertocompensateforthedeficienciesinmaterialsandprocesses,thispaperproposesaschemeformechanicalperformanceenhancement.Specifically,itincludesthefollowingtwoaspects:thefirstistoimprovethematerialselection,usebetterqualitymaterials,andimprovemechanicalpropertiessuchasstrengthandtoughness;thesecondistoimprovetheprocessflow,optimizetheprocessingmethod,strictlycontroltheprocessingparameters,improveprocessingqualityandaccuracy.Throughtheaboveanalysisandschemeformulation,thispaperaimstoprovidereferenceandhelpforsolvingtheproblemofJB36-400typecloseddoublepointpressmachinecrankshaftfracturefailure.Keywords:press