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大型复杂截面的型材框在新型运载型号中有着广泛的应用。针对大型横截面积、弯曲直径为Φ5 m的型材框零件进行拉弯成形工艺研究。通过分析润滑方式、预拉力、补拉量等参数对零件回弹的影响,设计拉弯工艺参数:预拉力为450 k N,预拉包角为72°,补拉力为500 k N,补拉包角为82°,补拉量为50 mm。试验表明,采用以上工艺参数得到零件端头回弹量为2.5~3 mm,验证了工艺参数的可行性。通过试验,得到了大型截面、大弯曲直径零件的成形工艺方法,且产品满足使用要求。
Large cross-section of the profile section of the new carrier model has a wide range of applications. For the large cross-sectional area, bending diameter of Φ5 m section of the box component bending process. By analyzing the influence of lubrication method, prestressing force and pulling force on springback of part, the parameters of pre-tensioning and bending are designed: the pre-tension is 450 kN, the pre-tensioning angle is 72 °, the supplementary tension is 500 kN, The wrap angle is 82 ° and the pull amount is 50 mm. Experiments show that using the above process parameters to obtain the springback of the part tip is 2.5 ~ 3 mm, which verifies the feasibility of the process parameters. Through the experiment, the forming method of the large cross-section and large bending diameter parts is obtained, and the products meet the requirements of use.