机械5

摘要 本次设计的内容是摇臂支架机械加工工艺规程及车2XФ12左外圆夹具设计，具体如下： 1、零件分析，主要是零件作用的分析和工艺分析，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。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、设计车削装夹夹具。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。完成夹具装配图及夹具体图的绘制等。 Abstract The co
nte
nts of this desig
n are the machi
ni
ng process of rocker arm bracket a
nd the desig
n of the left outer circle fixture of 2X 12. 1, part a
nalysis, mai
nly the a
nalysis of the role of parts a
nd process a
nalysis, accordi
ng to the requireme
nts of the parts drawi
ng, determi
ne the ma
nufacturi
ng form a
nd size of the bla
nk. 2. Choose the base level to determi
ne the rough datum a
nd precise datum i
n the process. Accordi
ng to the selected datum, make the process route. Accordi
ng to the selected process route, the cutti
ng amou
nt a
nd basicworki
ng hours of each step are determi
ned, a
nd the appropriate machi
ne tools a
nd tools are selected. 3. Desig
n the clampi
ng fixture. The positio
ni
ng scheme a
nd compo
ne
nts, clampi
ng scheme a
nd compo
ne
nts are determi
ned, a
nd the cutti
ng force, clampi
ng force a
nd positio
ni
ng error are calculated. Fi
nish fixture assembly drawi
ng a
nd clip drawi
ng. 目录 1零件分析和毛坯设计1 1.1零件工艺分析及生产类型确定1 1.1.1零件的组成表面分析1 1.1.2零件的技术要求分析2 1.1.3零件的形位公差分析2 1.1.4零件生产类型的确定2 1.2毛坯类型及毛坯图设计3 2机械加工工艺规程设计4 2.1零件基准的选择4 2.2零件加工工艺方案的拟定5 2.3零件加工设备及装备的选择5 2.4机械加工余量的确定6 2.5加工工序切削用量及时间定额的计算9 3专用夹具设计24 3.1工序内容及加工要求24 3.2定位基准24 3.3夹具结构设计及工作流程24 3.4设计定位方案应满足的要求25 3.5定位方案的确定25 3.6定位元件的确定26 3.7夹紧方案的确定26 3.8夹紧元件的确定27 3.9夹具体的设计27 3.10计算切削力28 3.11计算夹紧力29 3.12定位误差的分析30 结论31 致谢32