机械5

蝶阀阀体工艺设计及钻夹具设计 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。夹具利用率高，经济性好，对功能组件的使用和数量少。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。 本次设计的题目是蝶阀主体工艺设计及钻2-Ф17凸台面上Ф5孔夹具设计，根据老师给的图纸要求进行工艺设计和夹具设计，在掌握零件作用的基础上，对零件的工艺进行分析。针对设计给定的题目，里面主要对机床夹具进行设计。本文设计的专用夹具在立式钻床上加工。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词：蝶阀；工艺；机床夹具 Abstract Fixture is the clampi
ng device for machi
ni
ng parts, a
nd it is a
n i
ndispe
nsable device for machi
ni
ng parts. The fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy a
nd less use a
nd qua
ntity of fu
nctio
nal compo
ne
nts. 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 fixture. I
n the desig
n of special fixture,we should co
nsider the positio
ni
ng scheme ofworkpiece, the clampi
ng scheme ofworkpiece a
nd the desig
n of clampi
ng mecha
nism, the other parts of the fixture, the structure of the fixture, etc.. This desig
n topic is the butterflyvalve body process desig
n a
nd drill 2-with 17 co
nvex surfacewith 5 hole fixture desig
n, accordi
ng to teacher's drawi
ngs for process desig
n a
nd fixture desig
n, based o
n masteri
ng the role of parts, the parts of the process a
nalysis. For the give
n desig
n topics, the paper mai
nly o
n the desig
n of machi
ne tool fixture. The special fixture desig
ned i
n this paper is machi
ned o
nvertical drilli
ng machi
ne. This clip is desig
ned to e
nsure the machi
ni
ng accuracy, productio
n efficie
ncy a
nd easy operatio
n for the purpose of theworkers. At the begi
n
ni
ng of desig
n I refer to the releva
nt data a
nd literature at home a
nd abroad o
n the fixture, structure a
nd process of parts i
n the read parts map at the same time a
nalysis, clear coarse a
nd fi
ne refere
nce base selectio
n, determi
ne the machi
ni
ng allowa
nce a
nd the size of the bla
nk, so as to determi
ne the parts processi
ng process, calculatio
n of the process of cutti
ng dosage a
nd time. Fi
nally, the fixture
needed for the desig
n is completed. Keywords: butterflyvalve; process; machi
ne tool fixture 目录 第1章序言1 第2章零件的分析2 2.1零件的作用2 2.2零件的工艺分析2 第3章工艺规程设计3 3.1确定毛坯的制造形式3 3.2基面的选择3 3.2.1粗基准的选择原则3 3.2.2精基准选择的原则4 3.3制订工艺路线4 3.4机械加工余量、工序尺寸及毛皮尺寸的确定、切削用量及基本工时的确立5 第4章夹具设计31 4.1定位基准的选择31 4.2切削力及夹紧力计算31 4.3定向误差分析32 4.4夹具操作说明33 总结34 参考文献35