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1、本设计主耍闱绕发动机曲轴的T艺规程和专用夹具设计进行研究,其内容包括了解曲轴结构,确定曲轴的生产类型,相关的技术耍求。在此基础上,选择毛坯,确定毛坯的尺寸公差和机械加工余量,绘制毛坯图。CAD绘制标准零件图,并在认真详细分析零件图后,进行基准的选择,制定了表面加工方法,划分加工阶段,根据生产类型确定工序的集屮和分散,合理地安排工序,编排合适的工艺路线;进行详细的大量计算,包括:加工余量、工序尺寸和公差的确定、切削用量的计算及时间定额的计算。从而制定出一套合理的机械加T工艺卡片和机械加工工序卡片。
2、第二部分的设计是本课题的重点也是难点,主要閑绕专有钻床类夹具的设计,用卧式双面中心孔钻床,为铳断而打中心孔这道工序设计一钻床夹具。首先明确夹具设计的主耍任务,通过确定定位元件,导向装置,夹紧机构得出夹具的结构方案,查阅相关国家标准,绘画夹具装配图。本课题研究的发动机曲轴应用在汽车发动机中,总Z,曲轴加TT艺的安排以及专用夹具的设计是一项非常复杂的高难度T作,。它是一种需大批量生产的零件。且技术耍求比较高,为了确保产品的质量和水平,设计工作按照科学的程序进行,分清主次,合理取舍。关键词:曲轴,加工
3、工艺,工艺规程,制造工艺,夹具AbstractThedesignwasstudiedthatwasfocusedontransmissionwiththeshiftforkoftheprotocolsandproprietarydrillingfixturedesign,whosecontentswereincludedthattheuseofblades,thebladestypeofproductionandtherelevanttechnicalrequirements.Onthisbas
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6、e,processessizeandthedeterminationoftolerance.Theamountofcalculationandthecalculationofthefixedtimewascut.Thusasetofreasonablecardprocessingmachineryandmechanicalprocessescardsweredrawnup.Thesecondpartofthedesignwasthefocusofthisissuewhichwasdifficul
7、t,whowasmainlycenteredonproprietarydrillingfixturedesign,Z525-useverticaldrilling,drillingscrewholedesignprocessbywhichadrillingfixture.Firstlyfixturewasdesignedtoclearthemajortasksidentifiedbypositioningcomponents,guidancedevices,clampingbodyfixture
8、structure,accesstotherelevantnationalstandards,paintingfixtureassembly.Thestudyofthesubjecttransmissionbladeswasusedinthetransmissiongearboxshiftagencies.Throughthedesignofthetransmissionplectrumshiftgearboxbodieschangedstalls,thusitchangedthespeedof