机械5

左摆动杠杆零件的机械加工工艺规程和夹具设计 摘要 本文是对左摆动杠杆零件加工应用及加工的工艺性分析，主要包括对零件图的分析、毛坯的选择、零件的装夹、工艺路线的制订、刀具的选择、切削用量的确定、加工工艺文件的填写。选择正确的加工方法，设计合理的加工工艺过程。此外还对左摆动杠杆零件的一道工序的加工设计了专用夹具. 机床夹具的种类很多，其中，使用范围最广的通用夹具，规格尺寸多已标准化，并且有专业的工厂进行生产。而广泛用于批量生产，专为某工件加工工序服务的专用夹具，则需要各制造厂根据工件加工工艺自行设计制造。本夹具设计的主要内容是设计钻床夹具设计。 关键词：左摆动杠杆零件，工艺，工序，切削用量，夹紧，定位，误差 Abstract This paper is a
n a
nalysis of the processi
ng applicatio
n a
nd processi
ng tech
nology of left swi
ng lever parts, mai
nly i
ncludi
ng the a
nalysis of part drawi
ng, the selectio
n of bla
nk, the clampi
ng of parts, the formulatio
n of process route, the selectio
n of cutti
ng tools, the determi
natio
n of cutti
ng parameters a
nd the filli
ng of processi
ng process docume
nts. Select the correct processi
ng method a
nd desig
n a reaso
nable processi
ng process. I
n additio
n, a special fixture is desig
ned for the machi
ni
ng of the left swi
ng lever There are ma
ny ki
nds of machi
ne tool fixtures. Amo
ng them, the most widely used ge
neral fixtures have sta
ndardized specificatio
ns a
nd sizes, a
nd professio
nal factories produce them. The special fixture, which is widely used i
n mass productio
n a
nd serves a workpiece processi
ng process,
needs to be desig
ned a
nd ma
nufactured by each ma
nufacturer accordi
ng to the workpiece processi
ng process. The mai
n co
nte
nt of fixture desig
n i
n this paper is the fixture desig
n of drilli
ng machi
ne. Key words: left swi
ng lever parts, process, process, cutti
ng parameters, clampi
ng, positio
ni
ng, error 目录 一、绪论1 1.1机械加工工艺概述1 1.2机械加工工艺流程1 1.3夹具概述1 1.4机床夹具的功能2 1.5机床夹具的发展趋势2 1.5.1机床夹具的现状2 1.5.2现代机床夹具的发展方向3 二、左摆动杠杆的工艺分析4 2.1左摆动杠杆的用途4 2.2左摆动杠杆的技术要求4 2.3左摆动杠杆的工艺分析5 2.4确定左摆动杠杆的生产类型5 三、确定毛坯、绘制毛坯简图5 3.1选择毛坯5 3.2确定毛坯的尺寸公差和机械加工余量6 四、拟定左摆动杠杆工艺路线7 4.1定位基准的选择7 4.2表面加工方法的确定7 4.3加工阶段的划分8 4.4工序的集中与分散8 4.5工序顺序的安排9 4.6确定工艺路线9 五、加工余量、工序尺寸、和公差的确定11 5.1选择加工设备与工艺设备11 5.2加工余量工序尺寸及公差的确定12 六、切削用量、时间定额的计算16 6.1粗精铣宽24mm，毛坯28mm，的下表面16 6.2孔的加工17 6.3铣槽22 6.4时间定额的计算22 七、专用夹具设计25 7.1研究原始质料25 7.2设计要求25 7.3夹具的组成26 7.4夹具的分类和作用26 7.5设计要求29 7.6夹具设计29 7.6.1定位基准的选择29 7.6.2切削力及夹紧力的计算29 7.6.3定位误差的分析32 7.6.4钻套、衬套、钻模板设计与选用33 7.6.5夹具设计及操作的简要说明34 结论36 参考文献37 致谢38