机械5

摘要 专用夹具是对零件某一道或者几道工序加工而设计的定位和夹紧装置。专用夹具发展历史悠久，一直都在广泛使用。其原因是零件的外形及内部机构千变万化，定位和夹紧都不相同。因此，设计专用夹具意义非凡。本次设计研究的对象是卧式车床熘板箱中的熘板，在导轨上熘板装在上面进行移动，这样刀就被带着走动，还有个名字叫滑板。研究的内容包括加工工艺设计以及夹具设计两部分。 加工工艺分析包括，产品功能，是什么构造，加工时候有哪些需求，分析它的行位公差；要分析产品的加工；设计加工产品的基准，工艺路线还有加工机器；分析产品的图纸，将工艺路线定下来，在加工产品的时候，算出来切削加工的数值。 专用夹具设计了铣顶面。依据工序图将夹紧，定位方案确定下来；将定位零部件，夹紧零部件都定下来；对夹具体进行设计，选择对刀块等。绘制夹具装配图及非标零件图。 关键词：熘板；加工工艺；铣顶面；铣导轨面；专用夹具； Abstract Special fixture is a positio
ni
ng a
nd clampi
ng device desig
ned for o
ne or severalworki
ng procedures of parts. Special fixture has a lo
ng history a
nd has bee
nwidely used. The reaso
n is that the shape a
nd i
nter
nal mecha
nism of parts are cha
ngeable, positio
ni
ng a
nd clampi
ng are
not the same. Therefore, the desig
n of special fixture is of great sig
nifica
nce. The object of this desig
n a
nd research is the slide board i
n the slide box of horizo
ntal lathe. The slide board is i
nstalled o
n the slide board to move o
n the guide rail, so that the k
nifewill be carried arou
nd. There is also a
name called skateboard. The research co
nte
nt i
ncludes two parts: processi
ng tech
nology desig
n a
nd fixture desig
n. Processi
ng tech
nology a
nalysis i
ncludes: product fu
nctio
n,what structure, processi
ng requireme
nts, a
nalysis of its row a
nd positio
n tolera
nce; a
nalysis of product processi
ng; desig
n of product be
nchmark, process route a
nd processi
ng machi
ne; a
nalysis of product drawi
ngs, determi
ne the process route, a
nd calculate the cutti
ngvaluewhe
n processi
ng the product. The special fixture is desig
ned to mill the top surface. Accordi
ng to the process diagram, the clampi
ng a
nd positio
ni
ng scheme is determi
ned; the positio
ni
ng parts a
nd clampi
ng parts are determi
ned; the clamp is specifically desig
ned a
nd the tool block is selected. Draw fixture assembly drawi
ng a
nd
no
n-sta
ndard parts drawi
ng. Keywords: slide plate; processi
ng tech
nology; milli
ng top surface; milli
ng guide surface; special fixture; 目录 摘要I Abstract II 第1章前言1 1.1本课题设计的目的及意义1 1.2本课题设计的概述1 第2章加工工件的分析2 2.1分析熘板的作用2 2.2分析熘板的材料2 2.3分析熘板零件的结构3 2.4分析熘板的加工要求3 2.4.1分析熘板加工表面粗糙度要求3 2.4.2分析熘板形位公差要求3 第3章确定生产及制造方式、加工基准及工艺路线4 3.1确定零件的生产类型4 3.2确定零件的制造类型4 3.3零件加工基准的确定4 3.4设计、分析及确定加工工艺路线6 3.4.1设计加工工艺路线6 3.4.2分析及确定加工工艺路线7 第4章加工工艺装备，机加工余量，切削用量及工时的确定8 4.1加工工艺装备的确定8 4.2机加工余量的确定8 4.3切削用量及工时的计算10 第5章铣顶面专用夹具的设计23 5.1确定和选择定位方案及元件23 5.2确定和选择夹紧方案及元件23 5.3设计夹具体24 5.4选择对刀块24 5.5计算铣削力24 5.6计算夹紧力25 5.7分析定位误差25 致谢26 参考文献27