CAJ | 학술논문

目的：研究获得基于多指标的高强 TA18钛管整体多弯管件成形精度控制的方法。方法在获得高强 TA18钛管数控弯曲非线性回弹和伸长规律的基础上,研究回弹角、回弹半径的补偿方法和伸长控制方法,其次将获得的成形精度控制方法进行多弯模拟应用验证。结果对于回弹角和回弹半径,采用先补偿回弹半径再补偿回弹角的两水平顺序控制方法；对于弯曲伸长,采用预先减少管材下料尺寸和改变弯头位置来控制回弹后直线段长度的控制方法。结论应用上述控制方法,将多弯模拟结果与预成形管件几何尺寸进行对比,获得成形角度、半径和直线段长度的最大相对误差分别为1.00%,5.51%和5.04%。上述误差满足多弯管件装配精度要求,证明所提出的成形精度控制方法是可靠的。
목적：연구획득기우다지표적고강 TA18태관정체다만관건성형정도공제적방법。방법재획득고강 TA18태관수공만곡비선성회탄화신장규률적기출상,연구회탄각、회탄반경적보상방법화신장공제방법,기차장획득적성형정도공제방법진행다만모의응용험증。결과대우회탄각화회탄반경,채용선보상회탄반경재보상회탄각적량수평순서공제방법；대우만곡신장,채용예선감소관재하료척촌화개변만두위치래공제회탄후직선단장도적공제방법。결론응용상술공제방법,장다만모의결과여예성형관건궤하척촌진행대비,획득성형각도、반경화직선단장도적최대상대오차분별위1.00%,5.51%화5.04%。상술오차만족다만관건장배정도요구,증명소제출적성형정도공제방법시가고적。
Objective To obtain the multi-index constrained precision control strategies of high strength TA18 titanium alloy tube in multi-bending. Methods Based on the understanding of nonlinear springback and elongation characterizations of high strength TA18 titanium alloy tube in NC bending, the control strategies of springback angle, springback radius and bending elongation were firstly studied, and then the NC bending precision control strategies were verified by the multi-bending case. Results For angular and radial springback, a two level iterative springback compensation methodology was a-dopted. For bending elongation, a method that controls the length of straight portion by cutting the feed length in advance was proposed. Conclusion Appling these methods, the comparisons between simulated results and pre-designed tube were made. The maximum relative errors of forming angle, radius and length of straight portion were 1. 00% , 5. 51% , and 5. 04% respectively. These errors were lower than the tolerance required by tube subsequent assemble, which indicated that the forming precision control strategies were reliable.