机械5

制定阀套工艺及2-M8孔钻模夹具设计 摘要 加工工艺规程是以研究机械加工工艺技术和夹具设计为主技术学科，具有很强的实践性，要求学习过程中应紧密联系生产实践，同时它又具有很强的综合性， 本次设计的内容是制定阀套工艺及2-M8孔钻模夹具设计，具体如下： 1、对零件进行分析，主要是零件作用的分析和工艺分析，通过零件分析可以了解零件的基本情况，而工艺分析可以知道零件的加工表面和加工要求。根据零件图提出的加工要求，确定毛坯的制造形式和尺寸的确定。 2、选择基面，确定加工过程中的粗基准和精基准。根据选好的基准，制订工艺路线，通常制订两种的工艺路线，通过工艺方案的比较与分析，再选择可以使零件的几何形状、尺寸精度等技术要求得到合理的保证的一种工序。根据已经选定的工序路线，确定每一步的切削用量及基本工时，并选择合适的机床和刀具。 3、设计加工2-M8孔钻模专用夹具。对定位方案及元件，夹紧方案及元件进行确定，然后计算切削力、夹紧力和定位误差的分析等。 关键词：阀套、工艺、2-M8孔、钻模、夹具 Abstract Processi
ng procedure is the mai
n tech
nical subject of studyi
ng machi
ni
ng tech
nology a
nd fixture desig
n. It has stro
ng practicality. It requires that productio
n practice should be closely li
nked i
n the lear
ni
ng process. At the same time, it has a stro
ng comprehe
nsive
ness. The co
nte
nt of this desig
n is to desig
n thevalve sleeve tech
nology a
nd the 2-M8 hole drilli
ng jig desig
n, as follows: 1. The a
nalysis of the parts is mai
nly the a
nalysis of the fu
nctio
n of the parts a
nd the process a
nalysis. Through the a
nalysis of the parts,we ca
n k
now the basic situatio
n of the parts, a
nd the process a
nalysis ca
n k
now the machi
ni
ng surface a
nd processi
ng requireme
nts of the parts. Accordi
ng to the processi
ng requireme
nts set forth i
n the part drawi
ng, the determi
natio
n of the form a
nd size of the bla
nk is determi
ned. 2. Choose the base level to determi
ne the rough datum a
nd precise datum i
n the process. Accordi
ng to the selected be
nchmark, the process route is formulated, a
nd two process routes are usually formulated. Through the compariso
n a
nd a
nalysis of the process schemes, a process is selectedwhich ca
n e
nsure the geometric shape a
nd dime
nsio
nal accuracy of the parts. Accordi
ng to the selected process routes, determi
ne the cutti
ng parameters a
nd basicworki
ng hours for each step, a
nd select the appropriate machi
ne tools a
nd cutti
ng tools. 3, desig
n a
nd ma
nufacture special fixture for drilli
ng 2-M8 hole. The positio
ni
ng scheme a
nd compo
ne
nts, clampi
ng scheme a
nd compo
ne
nts are determi
ned, a
nd the
n the cutti
ng force, clampi
ng force a
nd positio
ni
ng error are calculated. Keywords:valve sleeve, process, 2-M8 hole, drill jig, jig 目录 摘要I Abstract II 第1章零件分析和毛坯设计1 1.1零件工艺分析及生产类型确定1 1.2毛坯类型及毛坯图设计2 第2章机械加工工艺规程设计4 2.1基准选择4 2.2工艺方案拟定4 2.3机械加工余量的确定5 2.4主要工序切削用量及时间定额的计算8 第3章专用夹具设计22 3.1工序内容及加工要求22 3.2定位基准22 3.3夹具结构设计及工作流程22 3.4设计定位方案应满足的要求22 3.5定位方案的确定23 3.6定位元件的确定24 3.7夹紧方案的确定24 3.8夹紧元件的确定25 3.9夹具体的设计25 3.10导向装置26 3.11计算切削力26 3.12计算夹紧力27 3.13定位误差27 第4章结论29 致谢30 参考文献31