连杆零件机械加工工艺规程及钻M14×1.5-7H螺纹底孔夹具设计 摘要 夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 本课题的主要研究内容是连杆零件机械加工工艺规程设计及加工螺孔M14×1.5-7H螺纹底孔夹具设计。连杆是在机械加工中常用的零件之一，在各种机器中应用广泛，为机器的正常运转提供强有力的保证，最终使得设备按照预想的方法进行相应的运动。 结合零件加工的重点和难点，从零件的结构分析入手，合理的进行定位基准选择、夹具的设计、各种刀具参数选择以及切削用量的选择等。在安排工艺过程时，根据加工要求不同，需要进行粗精加工。另外还确定了切削参数，加工工时，填写工艺过程卡片和工序卡片。设计一套加工M14×1.5-7H螺纹底孔钻床专用夹具。 关键词：连杆、加工工艺、M14×1.5-7H、钻床、专用夹具 Abstract Jig is the clampi
ng device for parts processi
ng,which is a
n esse
ntial device for processi
ng parts. With the cha
nge of the size of parts, more a
nd more fixtures are elimi
nated. Therefore, it is
necessary to desig
n a set of special fixtures. Whe
n desig
ni
ng the special fixture,we should co
nsider the positio
ni
ng scheme of theworkpiece, the clampi
ng scheme of theworkpiece a
nd the desig
n of the clampi
ng mecha
nism, other parts of the fixture, the structure of the fixture a
nd so o
n. The mai
n research co
nte
nts of this subject are the desig
n of machi
ni
ng process rules for co
n
necti
ng rod parts a
nd the desig
n of fixture for machi
ni
ng M14x1.5-7H thread bottom hole. Co
n
necti
ng rod is o
ne of the commo
nly used parts i
n machi
ni
ng,which iswidely used i
nvarious machi
nes. It provides a stro
ng guara
ntee for the
normal operatio
n of the machi
ne, a
nd ultimately makes the equipme
nt move accordi
ng to the expected method. Combi
ni
ngwith the key a
nd difficult poi
nts of parts processi
ng, starti
ng from the structural a
nalysis of parts, reaso
nable selectio
n of positio
ni
ng datum, fixture desig
n,various tool parameters selectio
n a
nd cutti
ng parameters selectio
n. Whe
n arra
ngi
ng the tech
nological process, rough fi
nishi
ng is required accordi
ng to differe
nt processi
ng requireme
nts. I
n additio
n, cutti
ng parameters, machi
ni
ng hours, process process cards a
nd process cardswere determi
ned. Desig
n a special fixture for processi
ng M14 1.5-7H thread bottom hole drilli
ng machi
ne. Keywords co
n
necti
ng rod, processi
ng tech
nology, M14 1.5-7H, drilli
ng machi
ne, special fixture 目录 摘要I Abstract II 第一章绪论1 1.1机械制造及机床夹具概述1 1.2机床夹具的设计要点1 第二章零件的分析2 2.1零件的作用2 2.2零件的组成表面、加工要求、形位公差分析2 2.2.1零件的组成表面2 2.2.2零件的技术要求3 2.2.3零件的形位公差3 第三章零件的工艺规程设计4 3.1确定零件的生产类型及毛坯的制造形式4 3.1.1确定零件的生产类型4 3.1.2确定毛坯的制造形式4 3.2基准的选择与确定5 3.3加工工艺路线确定6 3.4加工机床及加工装备的选择7 3.5确定加工余量7 3.6计算切削用量、基本时间及辅助时间10 第四章钻M14×1.5-7H螺纹底孔夹具设计30 4.1定位方案及装置的确定30 4.1.1设计定位方案应满足的要求30 4.1.2定位方案的确定30 4.1.3定位元件的确定30 4.2夹紧方案及装置的确定31 4.2.1设计夹紧装置应遵循的原则31 4.2.2夹紧装置满足的基本要求32 4.2.3夹紧方案的确定32 4.2.4夹紧元件的确定32 4.3夹具体的设计32 4.4导向装置确定33 4.5钻削力的计算33 4.6夹紧力的计算34 4.7定位误差的分析与计算34 结论36 致谢37 参考文献38