机械5

泵体的机械加工工艺及夹具设计 摘要 机械加工涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。在本次设计中主要包括了泵体零件的机械加工工艺规程和铣削前端面的夹具设计。工艺设计中首先对零件进行分析，拟定零件的机械加工工艺,设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；然后对零件各个工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；最后进行铣削前端面专用夹具的设计，设计出夹具的各个组成部件，如定位元件、夹紧元件、对刀装置、夹具体与机床的连接部件以及其它部件，计算出定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 通过此次设计，将所学理论与生产实践相结合，锻炼了自己分析问题，解决问题的能力，在这个过程中我独立的分析和解决了零件机械制造的工艺问题，设计了机床专用夹具的典型结构，提高了结构设计的能力，为今后的工作进行了一次适应性训练，从而为今后打下了坚实的基矗 关键词：工艺；切削用量；定位 ABSTRACT The mai
n co
nte
nts of the machi
ni
ng i
ncludevarious k
nowledge, such as the machi
ne ma
nufacture craft, the jig desig
n, the metal-cutti
ng machi
ne tool, the tolera
nce a
nd fit, a
nd so o
n. It i
ncludes the tech
nological procedure of hydraulic pump a
nd the fixture desig
n of milli
ng fro
nt-e
nd i
n this desig
n. Firstly, the process desig
n a
nalyzes the part, u
ndersta
nds the structure of the part, desig
ns the structure of the rough part, a
nd selects the process datum a
nd desig
ns the process rout of the part. The
n, part’s sizes ofvariousworki
ng steps are calculated, a
nd the key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of every process. Fi
nally, the fixture desig
n of milli
ng fro
nt-e
nd is desig
ned. All the compo
ne
nt parts of fixture are selected or desig
ned, such as the positio
n compo
ne
nts, clampi
ng compo
ne
nts, guidi
ng eleme
nts, the specific folder co
n
nectio
nwith the machi
ne parts a
nd other compo
ne
nts. The Locatio
n errorwhich is i
n the special-purpose fixture is calculated. At the same time, A
nalyzi
ng the reaso
nable a
nd deficie
ncies of the fixture structure,which is useful for improvi
ng the desig
n i
n the future. Through the curriculum desig
n,the theory a
nd productio
n practice,exercise their ability to a
nalyze a
nd solve problems, i
n this process,I i
ndepe
nde
ntly a
nalyze a
nd solve the process problems of parts i
n the machi
nery ma
nufacturi
ng, desig
n of the typical structure of machi
ne tool fixture, a
nd improve the desig
n ability structure, Co
nducted a
n adaptive trai
ni
ng for futurework, so as to lay a solid fou
ndatio
n. KEYWORDS: Craft；Cutti
ng parameters；Locatio
n 目录 第1章绪论1 第2章零件分析3 2.1零件的作用3 2.2零件的技术要求3 2.3零件的工艺分析4 第3章确定毛坯类型绘制毛坯简图5 3.1选择毛坯5 3.2确定毛坯的尺寸公差和机械加工余量5 3.3绘制泵体铸件毛坯简图6 第4章工艺规程设计7 4.1定位基准的选择7 4.2制定工艺路线7 4.3装备及工艺装备的选用9 4.4确定加工余量10 4.5切削用量的计算11 4.6时间定额的计算21 第5章夹具设计33 5.1夹具设计任务33 5.2拟定铣床夹具结构方案33 5.3加紧方案的确定35 5.4夹具体38 5.5夹具装配图38 总结39 附录41 参考文献43 致谢45