机械5

摘要 对于汽车来说，最重要的动力总成就是发动机，对于发动机来说，重要的零件就是连杆，它是用来对动力进行传送的，连杆工作的地方环境非常差，作用在上面的力也很大，所以说，生产发动机连杆的时候，生产工艺要求是很高的，在这个基础上，研究连杆的生产过程，主要说明的地方有加工工艺，设计夹具，生产机器的切削配合公差等。主要介绍了发动机连杆的生产工艺还有详细的过程，设计夹具来对孔Ф10H9进行钻，铰加工，主要是设计产品的生产工艺，设计工艺流程，设计专用夹具。在进行设计的时候，首先分析了产品，之后按照工艺把坯料的构造算出来，将产品的生产基准定下来，从工序的数据将切削生产量算出来；之后设计夹具，主要设计的是夹具的结构，还有夹具的零部件，将定位偏差算出来，这篇对连杆进行设计，希望能够为这方面提出些有用的建议。 关键词：发动机连杆；加工工艺；工艺规程；夹具设计 Abstract E
ngi
ne is a
n importa
nt power assembly of automobile, co
n
necti
ng rod is a
n importa
nt part of e
ngi
ne, which plays a
n importa
nt role i
n the tra
nsmissio
n of power. The worki
ng e
nviro
nme
nt of co
n
necti
ng rod is bad, a
nd the beari
ng force is huge. It has strict requireme
nts for the processi
ng tech
nology of co
n
necti
ng rod of e
ngi
ne. Based o
n this, the processi
ng process of co
n
necti
ng rod was explored a
nd ma
nufactured. The ma
nufacturi
ng process, fixture desig
n, machi
ne tool chip a
nd tolera
nce matchi
ng are described. I
n this paper, the tech
nological rules a
nd process of e
ngi
ne co
n
necti
ng rod, the fixture desig
n of drilli
ng a
nd reami
ng 10H9 holes, i
ncludi
ng the process desig
n of parts a
nd compo
ne
nts, process desig
n a
nd special fixture desig
n, are mai
nly discussed. The desig
n process of this paper is to a
nalyze the parts, calculate the structure of the bla
nk by the basic tech
nology, determi
ne the processi
ng be
nchmark of the parts, a
nd calculate the cutti
ng parameters accordi
ng to the worki
ng procedure. Fi
nally, the fixture desig
n i
ncludes the compositio
n of the fixture a
nd the mai
n compo
ne
nts, a
nd calculate the fixture positio
ni
ng error. The research of this paper ca
n be added to the co
n
necti
ng rod of the automobile e
ngi
ne. Work provides some refere
nce. Keywords:e
ngi
ne co
n
necti
ng rod; processi
ng tech
nology; process specificatio
n; fixture desig
n 汽车发动机连杆加工工艺规程及钻孔夹具设计 目录 前言1 第1章发动机连杆零件分析2 1.1发动机连杆作用2 1.2发动机连杆工艺分析2 1.2.1工艺过程安排2 1.2.2夹紧方法选取3 1.2.3连杆两端面的加工3 1.2.4连杆大、小端孔的加工4 第2章发动机连杆加工工艺规程设计5 2.1发动机连杆毛坯制造形式5 2.2加工基准的选取5 2.3工艺路线制定6 2.4加工余量和尺寸确定8 2.5切削用量及工时确定8 第3章专用夹具的设计12 3.1问题提出12 3.2定位基准的选择13 3.3定位元件的设计13 3.4切削力和夹紧力的计算13 3.5定位误差分析14 3.6夹具设计及简要操作说明16 总结18 致谢19 参考文献20