Zhang Xinlong, Jiang Zhaosong, Zhao Shuang, Xie Xiaodong, Xiao Jiang, Liu Xueyan, Wu Zhe, Zhang Yang
College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China.
College of Science, Northeast Forestry University, Harbin 150040, China.
Materials (Basel). 2024 Jul 1;17(13):3230. doi: 10.3390/ma17133230.
The production of aluminum alloy multi-lumen tubes primarily involves hot bending formation, a process where controlling thermal deformation quality is difficult. Specifically, the inner cavity wall of the tube is prone to bending instability defects under the bending stress field. To address these challenges in the bending deformation of aluminum alloy multi-lumen tubes, a multi-lumen liquid-filled bypass forming method is proposed in this paper. This study focuses on the 6063-T5 aluminum alloy double-lumen tube as the research object. The liquid-filled bending deformation behavior of the aluminum alloy double-lumen tube was investigated, and the deformation theory of the aluminum alloy double-lumen tube was studied. Through experimental and numerical simulation methods, the influence of support internal pressure, bending radius, and tube wall thickness on the liquid-filled bending deformation behavior of the double-lumen tube was examined. The results indicate that when the value of internal pressure was 7.5 MPa, the straightening of the outer wall was improved by 2.51%, the thinning rate of wall thickness was minimized, and the internal concave defect was effectively suppressed. The liquid-filled bending method provides a promising new approach for the integrated bending and forming of multi-lumen tubes.
铝合金多腔管的生产主要涉及热弯成型，这是一个控制热变形质量困难的过程。具体而言，在弯曲应力场作用下，管的内腔壁容易出现弯曲失稳缺陷。为解决铝合金多腔管弯曲变形中的这些挑战，本文提出了一种多腔充液旁路成型方法。本研究以6063-T5铝合金双腔管为研究对象。研究了铝合金双腔管的充液弯曲变形行为，并对铝合金双腔管的变形理论进行了研究。通过实验和数值模拟方法，考察了支撑内压、弯曲半径和管壁厚度对双腔管充液弯曲变形行为的影响。结果表明，当内压值为7.5MPa时，外壁的校直效果提高了2.51%，壁厚减薄率最小，内凹缺陷得到有效抑制。充液弯曲方法为多腔管的整体弯曲成型提供了一种有前景的新途径。
