论文部分内容阅读
针对焊接结构降低双连续弯曲半径管件力学性能的缺点,提出利用推弯模具限制成形的特点进行该类管件成形,并对其可行性进行分析。根据单弯曲半径推弯的经验,设计双连续弯曲半径推弯模具型腔,在Forge 3D软件中建立有限元模型,分别模拟有、无内置芯模与管坯端头预倒角的3种工况的成形过程,并对模拟结果进行分析。研究结果表明,芯模和端头预成形分别起到支撑和引导金属流动的作用,两者缺一不可。结合良好工艺条件下的推弯验证试验可得,双连续弯曲半径铝合金管件推弯成形的横截面畸变能够得到有效抑制,该成形方法是可行的。
Aiming at the defect that the welding structure reduces the mechanical property of the pipe with double continuous bending radius, the forming of this kind of pipe is proposed by using the characteristics of the bending forming mold to limit the forming, and its feasibility is analyzed. According to the experience of bending with single bending radius, the die cavity with double continuous bending radius is designed and the finite element model is established in Forge 3D software to simulate the three types of work with and without pre-chamfering Shape the process of forming, and analyze the simulation results. The results show that both mandrel and tip preform play the role of supporting and guiding metal flow, respectively. Combined with the good bending test, the cross-sectional distortion of double continuous bending radius aluminum alloy tube can be effectively restrained. The forming method is feasible.