CAJ | 학술논문

针对航空发动机典型件传扭转接盘在加工过程中因易变形而导致面型误差大、成品率低的问题,利用有限元模拟、力系平衡理论和铣削试验相结合的方法分析了自重、切削力、夹具及装夹方式、加工顺序4个方面对工件变形的影响。结果表明：自重对工件变形有一定影响,利用压板夹具装夹,其装夹力对工件变形影响较大;随着切削力的增大,工件变形增大,在相同切削力变化区间内,铣削工件正面两端凸台面时切削力对工件变形影响最大;利用圆柱销和沉头螺钉装夹方式设计的夹具能够减小装夹力和自重对加工变形的影响,选用正反面反复铣削加工方法可以有效地降低工件变形程度。
침대항공발동궤전형건전뉴전접반재가공과정중인역변형이도치면형오차대、성품솔저적문제,이용유한원모의、력계평형이론화선삭시험상결합적방법분석료자중、절삭력、협구급장협방식、가공순서4개방면대공건변형적영향。결과표명：자중대공건변형유일정영향,이용압판협구장협,기장협력대공건변형영향교대;수착절삭력적증대,공건변형증대,재상동절삭력변화구간내,선삭공건정면량단철태면시절삭력대공건변형영향최대;이용원주소화침두라정장협방식설계적협구능구감소장협력화자중대가공변형적영향,선용정반면반복선삭가공방법가이유효지강저공건변형정도。
Aiming at the problems of big tolerance in flatness and low efficiency aroused in the processing deformation of typical aero engine parts--transmission reverse disc, this paper analyzed the influences of the work piece weight, milling force, clamping ways and processing technology on the part deformation with the method of finite element simulation and milling tests. The results show that the gravity has a certain effect on the part deformation and the clamping force has more effect on part deformation with the plate fixture clamp. Milling the ends of the convex surface has the greater impact on deformation in the same milling force change interval. Using cylindrical pins and countersunk head screws clamping the deformation influenced by the clamping force and gravity can be reduced. The method of repeatedly milling the obverse side and reversed side can reduce the part deformation degree effectively.