机械5

万向节滑动叉的工艺规程及渐开线花键槽夹具设计 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， 本次设计的内容是滑动叉的工艺规程及拉削渐开线花键夹具设计，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、设计加工渐开线花键槽的专用夹具。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：加工工艺、滑动叉、拉削、渐开线花键 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 desig
n of the co
nte
nt of the slidi
ng fork a
nd broachi
ng i
nvolute spli
ne clamp 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 special fixture for Machi
ni
ng I
nvolute Spli
ne slot. 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: processi
ng tech
nology, slidi
ng fork, broachi
ng a
nd i
nvolute spli
ne 目录 摘要I Abstract II 第一章绪论1 1.1夹具定位方案的概述1 1.2夹具夹紧方案的概述1 1.3夹具体设计的基本要求2 第二章滑动叉零件的分析3 2.1零件的作用3 2.2零件的分析3 2.2.1零件的工艺分析3 2.2.2零件结构分析4 2.2.3零件的技术要求分析4 2.2.4零件的组成表面4 2.2.5零件的技术要求5 2.2.6零件的形位公差5 第三章滑动叉工艺规程的设计6 3.1零件生产类型的确定6 3.2确定零件的材料及制造方式6 3.3选择加工的定位基准7 3.4加工工艺路线的选择、比较与确定7 3.4.1加工工艺路线方案一8 3.4.2加工工艺路线方案二8 3.4.3加工工艺路线的比较与确定8 3.5加工设备、加工刀具及量具的选用9 3.6各工序工步加工余量的计算10 3.7确定切削用量及基本工时11 第四章专用夹具设计22 4.1定位方案和定位装置的设计22 4.2夹紧方案和夹紧装置的设计23 4.3机床联接装置—夹具体的设计23 4.4导向装置的设计24 4.5切削力的计算24 4.6夹紧力的计算25 4.7定位误差的分析25 结论27 致谢28 参考文献29