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1、毕业设计(论文)摘要发动机曲轴是发动机中最重要的部件之一,它承受复杂、交变的冲击载荷,是发动机设计的重点和难点。正因为曲轴在发动机动力输出中的重要性及受力的复杂性,曲轴的加工质量的好坏直接影响整个发动机的寿命及性能的好坏。随着科学技术的进步,数控加工技术得到了更广泛的应用。数控车床、数控内铣床、数控车拉床等先进设备对主轴颈、连杆轴颈进行数控车削、内铣削、车-拉削加工,以有效减少曲轴加工的变形量。曲轴精加工将广泛采用CNC控制的曲轴磨床对其轴颈进行精磨加工。此种磨床将配备砂轮自动动平衡装置、中心架自动跟踪装置、自动测量、自动补偿装置、砂轮自动修整、恒线速度等功能要求,以保证磨削质量的稳定。本文
2、以Pro/E中的NC模块与VERICUT软件为基础,结合其各自特点,通过对某发动机曲轴的数控模拟加工的研究,提出一种零件建模、仿真加工的快捷方法,可大大加快建模编程速度、仿真验证加工工艺,提高生产效率。关键词:发动机曲轴;VERICUT;Pro/E;数控加工;仿真III毕业设计(论文)ABSTRACTThecrankshaftisoneofthemostimportantpartsofengine,becauseitbearthecomplex,theimpactofalternatingload,thustheenginedesignisimportantanddifficult. Bec
3、auseofthecrankshaftintheenginepoweroutputintheimportanceandcomplexityoftheforce,thecrankshaftmachiningqualitydirectlyaffectstheentirelifeoftheengineandperformanceisgoodorbad. Withthedevelopmentofscienceandtechnology,NCtechnologyismorewidelyused.CNClathes,themillingmachine,CNClathespindlebroachingma
4、chineandotheradvancedequipmenttotheneck,connectingrodjournalforCNCturning,millinginsidethecar-pull-cutprocessing,inordertoeffectivelyreducethedeformationofthecrankshaftmachining. FinishingwillbewidelyusedcrankshaftcrankshaftgrinderCNCcontrolforfinegrindingofitsjournal. Suchgrindingmachineswillbeequ
5、ippedwithautomaticgrindingwheelbalancingequipment,thecenterrackautomatictrackingdevices,automaticmeasurement,automaticcompensationdevice,automaticwheeldressing,constantspeedandotherfunctionsrequiredtoensurethestabilityofthegrindingquality. Inthispaper,Pro/EinNCmodulesandVERICUTsoftware,combinedwith
6、theirrespectivecharacteristics,theenginecrankshaftthroughaprocessofNCsimulationpresentsapartmodeling,simulationprocessing,quickwaytogreatlyspeedupthemodeling programmingspeed,simulationprocess,improveproductionefficiency. Keywords:NC;Pro/NC;VERICUT; machine; SimulationIII毕业设计(论文)目录摘要IABSTRACTII1.绪论
7、11.1课题的提出依据和意义11.2课题选题的目的11.3曲轴的加工工艺发展22.软件的介绍42.1Pro/EGINEER及Pro/NC模块简介42.2VERICUT简介53.基于PRO/E的发动机曲轴的建模63.1发动机曲轴的选择63.2发动机曲轴PRO/E三维建模64.曲轴的加工工艺分析94.1曲轴的毛坯及其热处理94.2曲轴毛坯的制造方法94.3曲轴毛坯的热处理104.4曲轴的技术要求104.4.1尺寸