CAJ | 학술논문

针对采用有限元模拟时焊合面不能设置为刚性对称面的空心型材，其焊合过程不能模拟计算的问题，提出了基于有限元法结合逆向工程技术的焊合面网格重构技术的解决方法，并采用该方法对异形管材分流模挤压的焊合过程进行了模拟分析．研究结果表明：当挤压行程为33．1 mm时完成了焊合，焊合温度范围477～496℃，焊合室内静水压力为169～3463 MPa，满足焊合要求；分流桥的焊合角部位所受应力最大，约为205 MPa．模具结构设计合理．
침대채용유한원모의시한합면불능설치위강성대칭면적공심형재，기한합과정불능모의계산적문제，제출료기우유한원법결합역향공정기술적한합면망격중구기술적해결방법，병채용해방법대이형관재분류모제압적한합과정진행료모의분석．연구결과표명：당제압행정위33．1 mm시완성료한합，한합온도범위477～496℃，한합실내정수압력위169～3463 MPa，만족한합요구；분류교적한합각부위소수응력최대，약위205 MPa．모구결구설계합리．
Existing FEM software cannot simulate the welding stage as the hollow profile with weld planes cannot be simplified as rigidity symmetric planes. In this paper, the metal flowing and die stress in the welding stage during porthole extrusion of a special pipe are analyzed based on Deform?3D commercial software and the reverse engineering method. The results show that the metal streams are welded as the extrusion stroke is 33.1 mm. At this moment, the welding temperatures are 477~496 ℃, the hydrostatic pressures in welding chamber are 169~3 463 MPa, which is enough to meet the welding requirements. The maximum stress located at the welding angle of porthole bridge is about 205 MPa, suggesting the die structure is reasonable.