机械5

摘要 连杆是某企业产品中的关键零件之一，本文主要论述了连杆的加工工艺及其夹具设计及其加工用组合机床。连杆的尺寸精度、形状精度以及位置精度的要求都很高，而连杆的刚性却比较差，容易产生变形，因此安排工艺过程时,需要把各主要表面的粗精加工工序分开。逐步减少加工余量、切削力及内应力的作用，并修正加工后的变形，这样才能最后达到零件的技术要求。由于连杆的生产量比较大，为了保证产品质量，提高加工效率，需要对其加工工艺进行优化设计，并在关键工序使用组合机床或专用机床进行加工。 关键词连杆精度加工工艺夹具设计组合机床 XX设计说明书（XX）外文摘要 Title The Processi
ng Tech
nologyWorki
ng Procedure Equipme
nt Desig
n of The Co
n
necti
ng Rod Abstract The co
n
necti
ng rod is o
ne of the keyparts of a
n e
nterprise products,this text expou
nds mai
nlythe machi
ni
ng tech
nologya
nd the desig
n of clampi
ng device of the co
n
necti
ng rod a
nd modular machi
ne tool of the co
n
necti
ng rod.The precisio
n of size,the precisio
n of profile a
nd the precisio
n of positio
n,of the co
n
necti
ng rod is dema
nded highly,a
nd the rigidityof the co
n
necti
ng rod is
not e
nough,easyto deform,so arra
ngi
ng the craft course,
need to separate the each mai
n a
nd superficial thick fi
nish machi
ni
ng process.Reduce the fu
nctio
n of processi
ng the surplus,cutti
ng force a
nd i
nter
nal stress progressively,revise the deformatio
n after processi
ng,ca
n reach the specificatio
n requireme
nt for the part fi
nally.As the output of the co
n
necti
ng rod isverylarge,it is
need to make optimal desig
n for the machi
ni
ng tech
nologya
nd use modular machi
ne tool for pivotal machi
ni
ng process,to e
nsure product qualitya
nd to improve the processi
ng efficie
ncy. Keywords Co
n
necti
ng Rod Precisio
n Processi
ng Tech
nologyDesig
n of Clampi
ng Device Modular Machi
ne Tool 目录 1绪论1 1.1设计的目的1 1.2设计要求1 1.3解决方案和技术路线2 2工艺设计3 2.1主要技术依据3 2.1.1生产纲领，生产类型3 2.1.2连杆的功用及主要结构参数3 2.1.3毛坯的选择及制备4 2.2工艺分析5 2.3加工方案6 2.3.1定位基准的选择6 2.3.2工艺路线方案的确定8 2.3.3加工质量的保证措施10 2.4工序设计13 2.4.1确定各工序的加工余量、计算工序尺寸及公差13 2.4.2确定各工序的切削用量、工时定额15 2.5工艺规程20 2.6连杆的检验24 2.6.1观察外表缺陷及目测表面粗糙度24 2.6.2连杆大、小头孔圆柱度的检验24 2.6.3连杆体、连杆盖结合面对大头孔中心线的对称度的检验24 2.6.4连杆大、小头孔平行度的检验25 2.6.5小头孔R67槽对连杆轴线的对称度的检验25 3夹具设计26 3.1夹具设计的要求26 3.2夹具设计26 4组合机床设计29 4.1组合机床设计的要求29 4.2组合机床总体设计29 4.2.1被加工零件工序图29 4.2.2加工示意图30 4.2.3机床联系尺寸总图33 4.2.4机床机床生产率计算卡35 结束语36 致谢37 参考文献38