轴向加速度对单侧双排四通管内高压成形规律的影响

摘要

以单侧双排四通管为研究对象,应用有限元分析软件分析内压、平衡冲头速度和挤压冲头平均速度相同时,不同轴向加速度对单侧双排四通管内高压成形壁厚、支管高度和主管补料规律的影响.结果表明:随着挤压冲头加速度增大,最大壁厚和最小壁厚值变化较小,最大壁厚值变化略大于最小壁厚值变化；支管高度和主管端部轴向位移明显增加；挤压冲头加速度增大明显增加外侧主管补料,但是对内侧主管补料影响较小.这些规律为四通管加载路径的选择提供了参考.%Unilateral four-way tube was considered as the research objective. Under the conditions of the same inner pressure, balance punch speed and extrusion punches average speed, finite element simulation method was utilized to simulate and analyze the influence of axial acceleration on tube thickness, branches height and tube feeding rule for unilateral four-way tube. The results show that with the increase of extrusion punch acceleration, maximum thickness values and minimum thickness values vary slightly, and the maximum thickness values vary higher than the minimum thickness values. At the same time, branch height and end axial displacement obviously increase. Feeding of outside tube between two branches increases large as extrusion punch acceleration increases, but extrusion punch acceleration has little influence on inside tube between two branches. These rules supply references for choosing loading paths.