【摘要】 实验研究了工艺参数对薄壁管数控弯曲成形中起皱、拉裂、回弹和截面畸变等的影响规律。推导及验证了合理芯棒伸出量的计算公式,分析了芯棒伸出量影响管件起皱和拉裂的主要原因;同时研究了弯曲中心角对回弹角和截面畸变的影响,得到了弯曲中心角与回弹角呈线性关系的结论。研究工作对于数值模拟和实际生产具有借鉴意义和参考价值。更多还原

【Abstract】 The influence of processing parameters on wrinkling, cracking, spring-back and deformation of thin-walled NC bending tube is studied by experimentation. The major reason for the extension length of mandrel influencing wrinkle and crack of tube is deeply analyzed, and the calculation formula of the most reasonable extension length of mandrel is deduced and proved. At the same time, the effects of angularity on spring-back angle and deformation of cross-section are researched, and the conclusion of the linear relationship between angularity and spring-back angle is obtained.更多还原