机械5

车削装夹夹具设计 【摘要】 本次设计的内容是制定壳体加工工艺及车削装夹夹具设计，具体如下： 1、对零件进行分析，主要是零件作用的分析和工艺分析，通过零件分析可以了解零件的基本情况，而工艺分析可以知道零件的加工表面和加工要求。根据零件图提出的加工要求，确定毛坯的制造形式和尺寸的确定。 2、选择基面，确定加工过程中的粗基准和精基准。根据选好的基准，制订工艺路线，通常制订两种的工艺路线，通过工艺方案的比较与分析，再选择可以使零件的几何形状、尺寸精度等技术要求得到合理的保证的一种工序。根据已经选定的工序路线，确定每一步的切削用量及基本工时，并选择合适的机床和刀具。 3、设计车削装夹夹具。对定位方案及元件，夹紧方案及元件进行确定，然后计算切削力、夹紧力和定位误差的分析等。完成零件及夹具装配体；夹具装配图及非标零件图的绘制等。 关键词：壳体、工艺、车削、夹具 Abstract: The co
nte
nt of this desig
n is to formulate the shell processi
ng tech
nology a
nd the desig
n of tur
ni
ng clampi
ng fixture, as follows: 1. The a
nalysis of parts is mai
nly the fu
nctio
n a
nalysis a
nd process a
nalysis of parts. Through the a
nalysis of parts,we ca
n u
ndersta
nd the basic situatio
n of parts, a
nd process a
nalysis ca
n k
now the processi
ng surface a
nd processi
ng requireme
nts of parts. Accordi
ng to the processi
ng requireme
nts of the part drawi
ng, the ma
nufacturi
ng form a
nd size of the bla
nk are determi
ned. 2. Select the base pla
ne to determi
ne the rough a
nd precise datum i
n the process of processi
ng. Accordi
ng to the selected be
nchmark, the tech
nological route isworked out. Usually, two ki
nds of tech
nological route areworked out. Through the compariso
n a
nd a
nalysis of tech
nological schemes, a processwhich ca
n reaso
nably guara
ntee the geometric shape a
nd dime
nsio
nal accuracy of parts is selected. Accordi
ng to the selected process route, the cutti
ng parameters a
nd basicworki
ng hours of each step are determi
ned, a
nd the appropriate machi
ne tools a
nd tools are selected. 3. Desig
ni
ng clampi
ng fixture for tur
ni
ng. The positio
ni
ng scheme a
nd compo
ne
nts, clampi
ng scheme a
nd compo
ne
nts are determi
ned, a
nd the
n the cutti
ng force, clampi
ng force a
nd positio
ni
ng error are calculated. Complete the drawi
ng of parts a
nd fixture assembly, fixture assembly drawi
ngs a
nd
no
n-sta
ndard parts drawi
ngs, etc. Keywords: shell, process, tur
ni
ng, fixture 目录 1零件分析和毛坯设计1 1.1零件工艺分析及生产类型确定1 1.1.1零件的组成表面分析2 1.1.2零件的技术要求分析2 1.1.3零件的形位公差分析2 1.1.4零件生产类型的确定3 1.2毛坯类型及毛坯图设计3 2机械加工工艺规程设计5 2.1零件基准的选择5 2.2零件加工工艺方案的拟定5 2.3零件加工设备及装备的选择6 2.4机械加工余量的确定6 2.5加工工序切削用量及时间定额的计算8 3专用夹具设计23 3.1工序内容及加工要求23 3.2定位基准23 3.3夹具结构设计及工作流程23 3.4设计定位方案应满足的要求23 3.5定位方案的确定23 3.6定位元件的确定24 3.7夹紧方案的确定24 3.8夹紧元件的确定25 3.9夹具体的设计26 3.10计算切削力27 3.11计算夹紧力28 3.12定位误差的分析29 结束语30 谢辞31 参考文献32