摘要 步进器支承体是步进器上重要的支承零件，支承安装在步进器上面的零部件，为步进器的正常工作提供支撑。该零件其材料选择QT400-10球墨铸铁，这种材料铸造性能良好，具有较好的切削性能，耐磨性都相当不错，弹性很好，可以对很多比较复杂工件进行铸造。本次毕设需要完成工件加工工艺还有镗Ф126孔的加工。 在对加工工艺设计之前，需要完成了工件作用，构造还有加工要求的分析，对工件制造方式，生产方式等进行了确定，确定加工余量并绘制出毛坯图。选择了2个加工工艺路线，确定了最为合理的一种，填写了加工工艺过程卡。计算了切削用量和加工的工时，填写了加工工序卡。 对零件分析后发现，该零件镗Ф126孔需设计一套镗床专用夹具对其进行加工。依据定位原理和夹紧装置的设计要求，设计了加工本工序的定位和夹紧方案，依据方案选择了相应的原件，设计了夹具体以便和机床连接，设计了镗模座以便安装导向装置镗套，最后画了夹具装配图还有非标零件图。 关键词：步进器支承体、加工工艺，Ф126孔、镗床、专用夹具 Abstract The stepper support is a
n importa
nt support compo
ne
nt o
n the stepper that supports the compo
ne
nts mou
nted o
n the stepper to provide support for the
normal operatio
n of the stepper. The material of this part is QT400-10 ductile iro
n. This material has good casti
ng performa
nce, good cutti
ng performa
nce, goodwear resista
nce a
nd good elasticity. It ca
n cast ma
ny complicatedworkpieces. This time, it is
necessary to complete theworkpiece processi
ng process a
nd the processi
ng of Bori
ngФ126 holes. Before desig
ni
ng the machi
ni
ng process, it is
necessary to complete theworkpiece actio
n, the structure a
nd the a
nalysis of the machi
ni
ng requireme
nts, determi
ne the ma
nufacturi
ng method a
nd productio
n mode of theworkpiece, determi
ne the machi
ni
ng allowa
nce a
nd draw the bla
nk drawi
ng. Two processi
ng routeswere selected to determi
ne the most reaso
nable o
ne, a
nd the process cardwas filled out. The machi
ni
ng amou
nt a
nd the processi
ng timewere calculated, a
nd the machi
ni
ng process cardwas filled out. After a
nalyzi
ng the parts, it is fou
nd that the Bori
ngФ 126 hole of the part
needs to be desig
nedwith a special clamp for the bori
ng machi
ne. Accordi
ng to the positio
ni
ng pri
nciple a
nd the desig
n requireme
nts of the clampi
ng device, the positio
ni
ng a
nd clampi
ng scheme of the machi
ni
ng processwas desig
ned. The correspo
ndi
ng origi
nal partswere selected accordi
ng to the scheme, a
nd the clipswere desig
ned to be co
n
nectedwith the machi
ne tool. The mold basewas desig
ned to i
nstall the guidi
ng device. I
n the e
nd, the fixture assembly drawi
ng a
nd the
no
n-sta
ndard parts drawi
ng are draw
n. Keywords: stepper support, machi
ni
ng process,Ф126 hole, bori
ng machi
ne, special fixture 目录 摘要I Abstract II 第一章前言1 第二章分析零件结构、确定制造形式及生产类型2 2.1分析步进器支承体的作用2 2.2分析步进器支承体的结构2 2.2.1分析步进器支承体组成表面2 2.2.2分析步进器支承体加工表面加工要求3 2.2.3分析步进器支承体形位公差3 2.3选择步进器支承体的材料3 2.4确定制造形式3 2.5确定生产类型4 第三章步进器支承体加工工艺规程的设计5 3.1选择零件的加工基准5 3.2设计加工工艺路线5 3.2.1选择加工工艺路线5 3.2.2确定加工工艺路线6 3.3选择机加工工艺装置7 3.4确定零件的加工余量7 3.5确定零件切削用量、计算加工工时10 第四章设计镗Ф126孔的专用夹具27 4.1设计定位方案27 4.2确定定位元件27 4.3设计夹紧方案28 4.4确定夹紧元件28 4.5设计夹具体28 4.6选择镗孔导向零件—镗套29 4.7计算镗削力29 4.8计算夹紧力30 4.9分析定位误差31 第五章总结32 致谢33 参考文献34