机械5

摘要 此次设计任务是对CA-10型汽油机曲轴零件的机械加工工艺夹具的设计，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CA-10型汽油机曲轴零件的工序的加工设计了专用夹具. 本文主要选取CA-10型汽油机曲轴零件加工过程中的粗车曲轴三个拐径及拐径两个侧面工序来做专用夹具设计，夹具设计要方便、简单。 关键词：加工工艺，加工方法，工艺文件，夹具 Abstract The graduatio
n project task is to desig
n the machi
ni
ng process fixture of CA-10 gasoli
ne e
ngi
ne cra
nkshaft parts, 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 tech
nology docume
nts. Choose the right processi
ng method a
nd desig
n the reaso
nable processi
ng process. I
n additio
n, a special fixture is desig
ned for machi
ni
ng the cra
nkshaft parts of CA-10 gasoli
ne e
ngi
ne I
n this paper, the special fixture desig
n is made by selecti
ng three tur
ni
ng diameters a
nd two side processes of rough tur
ni
ng cra
nkshaft i
n the processi
ng process of CA-10 gasoli
ne e
ngi
ne cra
nkshaft parts. The fixture desig
n should be co
nve
nie
nt a
nd simple. Keywords: processi
ng tech
nology, processi
ng method, process docume
nt, fixture 目录 摘要1 Abstract 2 第1章绪论4 1.1机械加工工艺概述4 1.2机械加工工艺流程4 1.3夹具概述5 1.4机床夹具的功能5 1.5机床夹具的发展趋势6 1.5.1机床夹具的现状6 1.5.2现代机床夹具的发展方向7 第2章零件分析8 2.1零件的作用8 2.2零件的工艺分析9 2.2.1以拐径为55mm为中心的加工表面9 2.2.2以轴心线两端轴为中心的加工表面9 2.2.3零件图样分析分析10 第三章工艺规程设计10 3.1确定毛坯的制造形式10 3.2基面的选择10 3.2.1粗基准选择11 3.2.2精基准的选择11 3.3制定工艺路线11 3.4机械加工余量、工序尺寸及毛坯尺寸的确定15 3.4.1加工两端中心线上的外圆表面15 3.4.3铣1：20圆锥处键槽16 3.4.4车磨拐径为Φ55 mm 16 3.5确定切削用量17 第4章车曲轴三个拐径及拐径两个侧面夹具设计32 4.1问题的提出32 4.2定位基准的选择32 4.3定位元件的设计32 4.4切削力及夹紧力计算32 4.5定位误差分析34 4.6夹具设计及操作简要说明34 总结36 参考文献37 致谢38