Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion
Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion
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DOI：
10.1016/j.cja.2022.10.001
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发表时间：
2022-10
影响因子：
5.7
通讯作者：
Shenghan Hu;Cheng Cheng-Cheng;A. Abd El-Aty;Shuo Zheng;Xunzhong Guo;Chunmei Liu;J. Tao
中科院分区：
文献类型：
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作者：
Shenghan Hu;Cheng Cheng-Cheng;A. Abd El-Aty;Shuo Zheng;Xunzhong Guo;Chunmei Liu;J. Tao
在三轴和六轴自由弯曲设备中，变形区长度(A)是在重新设计和制造相关结构时修改的固定机械结构参数。采用六自由度并联机构作为弯曲模的控制机构，提出了一种改变变形区长度a的新方法。首先，建立了基于自由弯曲主动运动的理想几何模型；然后，分析了变形区长度A对管材弯矩和弯曲半径的影响。建立了六自由度并联机构控制的基于自由弯曲主动运动的有限元仿真和运动学模型，研究了不同变形区长度的SS304管材弯曲过程。随后，分析了变形区长度A对并联机构弯曲半径、弯矩、壁厚和运动的影响。最后，在基于六自由度并联机构的自由弯曲装置上进行了实验研究。实验验证了理论分析、有限元仿真和运动学仿真的规律。
In three and six-axis free-bending equipment, the deformation zone length (A) is a fixed mechanical structure parameter modified when the relevant structure is redesigned and manufactured. In this study, a six degree of freedom (6-DOF) parallel mechanism was used as the control mechanism of the bending die, and a new method of changing the deformation zone length (A) was proposed. Firstly, an idealized geometric model of free bending-based active motion was established. Then, the influence of the deformation zone length (A) on the bending moment and the bending radius of the tube was analyzed. In addition, the finite element simulation and a kinematic model of free bending-based active motion controlled by the 6-DOF parallel mechanism were established, and bending processes of the SS304 tube with different deformation zone lengths were investigated. Afterwards, the impact of the deformation zone length (A) on the bending radius, bending moment, wall thickness, and motion of the parallel mechanism were analyzed. Finally, experiments were carried out on the free-bending equipment based on the 6-DOF parallel mechanism. Experiments verified the rules in the theoretical analysis, finite element simulation, and kinematic simulation.