复合材料制件Invar钢光顺模具型板冲压成形回弹性能研究
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摘要
针对双曲度板材回弹难以预测,对成形效率和质量存在不利影响的问题,对基于活络方形压头非对压技术的Invar钢模具型板冲压成形的回弹问题进行了系列试验研究。试验主要针对不同形状的帆形板和鞍形板进行,结果表明,由于该设备成形力学状态的复杂性,回弹具有一定的不确定性,但也存在明显规律。针对试验板有以下规律:至边缘位置距离的大小对回弹有重要影响,中间位置的板材回弹明显比板边缘处小;板的曲率越大,回弹越小;鞍形板比帆形板回弹小。研究结果可用于指导使用可变模具成形较均匀光顺的型板零件。
To predict the springback of double curvature plates is difficult. Springback has negative effects on forming efficiency and quality. A series of experiments were carried out to study the springback problem of Invar alloy smooth mould plate forming process based on the flexible square pressure head technique. The experiment aimed at punching different sail and saddle shaped plates. Due to the complexity of the forming mechanical state of the equipment, springback has certain uncertainties, but there are clear rules: The distance from the edge of the plate has an important impact on the springback, the springback of plate at middle position is obviously smaller than the edge; The larger the curvature is, the springback is smaller, but not stable; The springback of saddle shape is smaller than that of the sail shape. The results are useful to guide the forming of smooth sheet products with uniform deformation by flexible die.
To predict the springback of double curvature plates is difficult. Springback has negative effects on forming efficiency and quality. A series of experiments were carried out to study the springback problem of Invar alloy smooth mould plate forming process based on the flexible square pressure head technique. The experiment aimed at punching different sail and saddle shaped plates. Due to the complexity of the forming mechanical state of the equipment, springback has certain uncertainties, but there are clear rules: The distance from the edge of the plate has an important impact on the springback, the springback of plate at middle position is obviously smaller than the edge; The larger the curvature is, the springback is smaller, but not stable; The springback of saddle shape is smaller than that of the sail shape. The results are useful to guide the forming of smooth sheet products with uniform deformation by flexible die.
引文
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[11]刘凯,黄钢华,张博明.Invar钢性能测试与分析[C]//第十四届中国科协年会.石家庄,2012.LIU Kai,HUANG Ganghua,ZHANGBoming.Invar alloy performance testing and analysis[C]//The 14th China association for science and technology annual meeting.Shijiazhuang,2012.
[2]杨博,李宏,曹正华.殷钢在复合材料成形模具中的应用[J].玻璃钢/复合材料,2010(6):68-69,44.YANG Bo,LI Hong,CAO Zhenghua.Application of INVAR in mould for composites[J].Fiber Reinforce Plastic/Composite,2010(6):68-69,44.
[3]王玉华,陈洁,占小红,等.复合材料Invar模具制造技术分析[J].航空制造技术,2014,57(11):93-95,99WANG Yuhua,CHEN Jie,ZHANXiaohong,et al.Manufacturing technology research on Invar composites mould[J].Aeronautical Manufacturing Technology,2014,57(11):93-95,99.
[4]王呈方,胡勇,李继先,等.三维曲面船体外板成形加工的新方法[J].武汉理工大学学报(交通科学与工程版),2010(3):431-434WANG Chengfang,HU Yong,LI Jixian,et al.A novel forming method for 3D ship hull forming[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2010(3):431-434
[5]王呈方,焦和桐,胡勇,等.方形压头可调活络模具板材曲面成形装置:ZL200910014794.6[P].2009-03-12.WANG Chengfang,JIAO Hetong,HUYong,et al.Square pressure head adjustable flexible die sheet surface forming device:ZL200910014794.6[P].2009-03-12.
[6]苏绍娟,胡勇,王呈方.船体三维曲面外板成形工艺方法研究进展[J].中国造船,2012,53(2):211-216.SU Shaojuan,HU Yong,WANG Chengfang.Research progress of three-dimensional plate forming methods for ship hull[J].Shipbuilding of China,2012,53(2):211-216.
[7]严仁军,李双印,王呈方.船体中厚板冷压成形的回弹模拟[J].塑性工程学报,2011,18(4):54-58.YAN Renjun,LI Shuangyin,WANGChengfang.Numerical simulation research on springback of ship plate in multi-point forming mechanism with square press heads[J].Journal of Plasticity Engineering,2011,18(4):54-58.
[8]WAGONER R H,LIM H,LEE M G.Advanced issues in springback[J].International Journal of Plasticity,2013(45):3-20.
[9]刘红生,江开勇,崔俊佳,等.一种预测板材成形回弹的新的自适应无网格法[J].计算机集成制造系统,2018,24(1):72-79.LIU HongSheng,JIANG Kaiyong,CUIJunjia,et al.New adaptive meshless method for spring-back prediction in sheet metal forming[J].Computer Integrated Manufacturing Systems,2018,24(1):72-79.
[10]杨燕琴,赵耀.板材成形回弹的数值仿真方法研究[J].船海工程,2013(5):43-46.YANG Yanqin,ZHAO Yao.Numerical simulation method of spring-back in plate forming[J].Ship&Ocean Engineering,2013(5):43-46.
[11]刘凯,黄钢华,张博明.Invar钢性能测试与分析[C]//第十四届中国科协年会.石家庄,2012.LIU Kai,HUANG Ganghua,ZHANGBoming.Invar alloy performance testing and analysis[C]//The 14th China association for science and technology annual meeting.Shijiazhuang,2012.