摘要 本次设计所进行的设计可分为三个部分，第一部分是设计目标的连接盘盖零件的加工流程；第二部分是加工工艺、工序设计；第三部分是对所选加工过程中的铣D22端面工序进行专用夹具，本次设计综合杂糅了许多专业课程的知识。工艺设计主要流程的第一步就是对待加工零件的材料属性、外形结构进行分析，在了解了待加工零件的外形结构和材料特性后，才能明确待加工零件的锻造毛坯的尺寸和形状，然后才可以选定待加工目标零件的各个需要确定的加工基准面，为后续的工艺路线的设计奠定坚实基础；其次在明确工艺路线之后，还需要对各工步的加工余量进行计算，并且同时选择明确好每个工步的加工时所用到的仪器；最后需要设计在对待加工目标零件进行各种机加工时所需要的夹具，首先根据各个工序、工步所用到的加工方式、加工仪器，加工为止的选择，对夹具的定位元件等部件进行初步的明确，其需要根据各工序定位基准面的变化，对不同定位基准的各种情况下的定位误差进行一些列的计算，以确保夹具设计后对零件定位的准确性，最后可综合分析本次设计，提炼优点、总结缺点，明确技术优势和技术积累。 关键词：连接盘盖；加工工艺；专用夹具；加工余量；定位基准 Abstract The desig
n carried out i
n this graduatio
n desig
n ca
n be divided i
nto three parts.The first part is the processi
ng flowof co
n
necti
ng disc cap partswith desig
n objectives; the seco
nd part is the processi
ng process a
nd process desig
n; the third part is the special fixture for milli
ng D22 e
nd process i
n the selected processi
ng process.This desig
n combi
nes the k
nowledge of ma
nyprofessio
nal courses.The first step of the mai
n process of process desig
n is to a
nalyze the material attributes a
nd outli
ne structures of the parts to be processed.After k
nowi
ng the outli
ne structure a
nd material characteristics of the parts to be processed,the size a
nd shape of the forged bla
nk of the parts to be processed ca
n be defi
ned.The
n,the processi
ng datum surfaces to be determi
ned for each part to be processed ca
n be selected to desig
n the subseque
nt process route.Laya solid fou
ndatio
n; seco
ndly,after defi
ni
ng the process route,it is
necessaryto calculate the processi
ng allowa
nce of each step a
nd choose the i
nstrume
nts used for each step; fi
nally,it is
necessaryto desig
n the fixtures
needed forvarious machi
ni
ng of the target parts to be processed.Firstly,accordi
ng to the processi
ng procedures,the processi
ng methods a
nd i
nstrume
nts used for each step,add the fixtures.To e
nsure the accuracyof part positio
ni
ng after fixture desig
n,the desig
n ca
n be a
nalyzed comprehe
nsively,the adva
ntages a
nd disadva
ntages ca
n be refi
ned,the disadva
ntages ca
n be summarized,a
nd the tech
nical adva
ntages ca
n be defi
ned.Tech
nical accumulatio
n. Keywords: co
n
necti
ng disc cover; processi
ng tech
nology; special fixture; machi
ni
ng allowa
nce; positio
ni
ng datum 目录 摘要I Abstract II 第1章绪论1 1.1机床夹具的组成1 1.2机床在机械加工中的作用1 1.3本课题研究的目的及意义2 第2章零件的分析3 2.1零件的作用3 2.2零件的工艺分析3 第3章工艺规程设计4 3.1确定毛坯的制造形式4 3.2基面的选择4 3.2.1粗基准的选择原则4 3.2.2精基准选择的原则4 3.3制定工艺路线5 3.4确定各工序的加工余量7 3.5确定切削用量及基本工时8 第4章铣床夹具设计25 4.1问题的提出25 4.2定位基准的选择25 4.3定位元件的选择25 4.4切削力及夹紧力计算26 4.5定位误差分析26 4.6夹具设计及操作简要说明27 结论28 致谢29 参考文献30