大型拖拉机薄壁壳体夹紧变形对加工精度的影响  

Influence of Clamping Deformation of Thin-walled Box of Large Tractor on Machining Accuracy

作　　者：易良均 张延喜 黄娟 王建明 YI Liangjun;ZHANG Yanxi;HUANG Juan;WANG Jianming(Manufacturing Engineering Center,First Tractor Company Limited,Xiamen University,Luoyang 471003,China)

机构地区：[1]第一拖拉机股份有限公司制造工程中心,河南洛阳471003

出　　处：《拖拉机与农用运输车》2023年第2期86-90,共5页Tractor & Farm Transporter

摘　　要：大型拖拉机薄壁壳体易变形,加工精度要求高,夹具设计时定位基准和压紧点选择不当极易引起零件变形,导致加工精度无法达到图纸要求,通过运用CAE软件结合加工要求,对定位和夹紧点多方案对比,较形象的展现了不同方案对箱体加工精度的影响,并通过方案优化改进和实际加工验证达到了图纸要求的加工精度,提高了夹具设计的准确性和零件的加工精度。The thin-walled box of large tractor is easy to deform and requires high machining accuracy.During fixture design,improper selection of positioning datum and pressing point can easily lead to deformation of parts,which leads to the machining accuracy not meeting the drawing requirements.By using CAE software combined with machining requirements,multiple schemes of positioning and clamping points are compared,which vividly shows the influence of different schemes on the processing accuracy of the box.Through the optimization and improvement of the scheme and the actual machining verification,the machining accuracy required by the drawing is achieved,and the accuracy of fixture design and the machining accuracy of parts are improved.

关 键 词：CAE 薄壁箱体 夹具设计 

分 类 号：S219.9[农业科学—农业机械化工程]