车床加工毕业设计说明书.docx

车床加工毕业设计说明书.docx

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车床加工毕业设计说明书

年产5000台CA6140车床尾座体零件机加工艺规程及铣底面、钻孔工序夹具设计

作者姓名：

XXX

指导教师：

XXX

单位名称：

机械工程与自动化

专业名称：

机械工程及自动化

东北大学

20011年6月

Annual5,000CA6140lathethetailstockbodypartsmachiningproceduresandmillingunderside、drillingprocessfixturedesign

ByXXX

Supervisor:

ProfessorXXX

NortheasternUniversity

June2011

毕业设计（论文）任务书

毕业设计（论文）题目：

年产5000台CA6140车床尾座体零件机加工艺规程及铣底面、钻孔工序夹具设计

设计（论文）的基本容：

（1）尾座体零件图的绘制

（2）尾座体机加工艺规程的编制

（3）底面粗铣夹具的设计

（4）两工位钻床夹具的设计

（5）设计计算说明书

（6）专业外文文献翻译

毕业设计（论文）专题部分：

题目：

设计或论文专题的基本容：

学生接受毕业设计（论文）题目日期

　　　　　　　　　　　　　第　1　周

指导教师签字：

2011年　3　月　5　日

年产5000台CA6140车床尾座体零件机加工艺规程及铣底面、钻孔工序夹具设计

摘要

CA6140车床是国应用非常广泛的一种普通通用车床。

作为CA6140的重要组成部分，尾座体的加工也有很重要的意义。

本次设计主要研究尾座体的加工工艺以及粗铣和钻孔的夹具设计。

尾座体加工以顶面为粗基准，铣削底面和定位槽，然后以底面和定位槽为精基准加工各个孔。

本工艺规程中加工重点是Ф75H7孔。

因此制定工序时应以保证Ф75H7孔的形状、位置精度为主。

由于在加工过程中，对Ф75H7孔加工次数多。

如果连续加工，容易引起工件热变形，影响工件的精度，同时，在本工艺中，还有许多其他孔的加工，而且不能一次加工完成。

因此在加工Ф75H7孔的工序中，插入其余孔的加工，这样就可以减少因为工件热变形而带来的误差。

具体工艺规程如下：

（1）铣底面及定位槽

（2）粗镗Ф75H7孔

（3）精镗Ф75H7孔

（4）钻其它孔

（5）粗珩Ф75H7孔

（6）钻其他孔

（7）精珩Ф75H7孔

（8）检验5%

（9）上漆

（10）实效

（11）研底平面

钻卡具的定位方式都采用六点定位，以底平面和定位槽限制五个自由度，V形压块限制一个自由度。

铣夹具采用六点定位方式，以Ф60mm铸造毛坯孔两端为定位基准，两个短锥套上限制四个自由度，另以端面靠在花纹支撑限制一个自由度，再以侧面和一个可调支撑钉限制一个自由度。

关键词：

底片取送系统，运送小车，夹持器

Annual5,000CA6140lathethetailstockbodypartsmachiningproceduresandmillingunderside、drillingprocessfixturedesignAbstract

CA6140latheisanormalandcommonlathewhichiswidelyusedinourcountry.AstheimportantpartofCA6140,themanufacturingoftailstockisalsosignificant.

Thisdesignmostlystudiesthemanufacturingtechnologyoftailstockandchampingapparatus’sdesignofsketchyboring.

Thefaceonthetopisconsideredtobesketchydatumwhilemanufacturingtailstock,millingthebottomandorientedtrough,andthenmanufacturingtheotherholeswiththeaccuratedatumofthefaceonbottomandorientedtrough.TheimportantpartofmanufacturingofthistechnologicalprocessistheФ75H7hole,soweshouldguaranteetheshapeandthepositionaccuracyoftheФ75H7hole.Duringtheperiodofmanufacturing,itisneededtomanufacturetheФ75H7holemanytimes,ifmanufacturingconstantly,itiseasytoresultinthethermaldeformityandaffecttheworkpiece’saccuracy.Meanwhile,thereareotherholesneededtobemanufacturedandcan’tbefinishedonetime.SoifmanufacturingtheotherholesduringmanufacturingtheФ75H7hole,wecanlowertheerrorbecauseofworkpiece’sthermaldeformity.

Thefollowingistheconcretetechnologicalprocess:

（1）.Millingthefaceonbottomandorientedtrough

（2）.SketchyboringФ75H7hole

（3）.AccurateboringФ75H7hole

（4）.Drillingtheotherholes

（5）.SketchygrindingФ75H7hole

（6）.Drillingtheotherholes

（7）.AccurategrindingФ75H7hole

（8）.Examining5%

（9）.Spraypainting

（10）.Effectivenessforagivenperiodoftime

（11）.Grindingthefaceonbottom

Thejigsofdrillingmachineusesixpointstodefineworkpiece’sposition.Itrestrictsfivefree-occasionsbyfixingsurfaceandslot,andonefree-occasionbyablockwhoseshapelikestheletterof“v”.Thejigsofmillingmachinealsochoicethiswaytofixthepartsusingbothsidesofcastingblankholeasdatum.Thediameteroftheholeis60mm.Exceptthattwoshorttapersleevesareusedtorestrictfourfree-occasions,thejigsmakestheworkpiece’sendsurfacelingonthesupportingfacetorestrictonefree-occasions.Thelastfree-occasionisdefinedbysurfaceinworkpiece’ssideandasupportingnailwhichcanbeadjusted.

Keywords:

Film-catching-and-deliveringsystem，Deliveringvehicles，catchingstructure

任务书··································································································i中文摘要···························································································ii

ABSTRACT····················································································iii

第1章绪论···················································································1

1.1本课题的目的和意义·······································································1

1.1.1本课题的目的和意义·····································································1

1.1.2工艺规程的概述···········································································1

1.2国外研究现状、发展动态·····························································2

第2章尾座体机加工艺规程的编制····················································5

2.1生产类型的确定·················································································5

2.2零件的分析························································································5

2.2.1零件的功用····················································································5

2.2.2零件的主要技术要求及其工艺分析·····················································5

2.3总体布置设计···················································································6

2.3.1工件的定位································