工程拼焊板拉延时焊缝移动和回弹研究
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摘要
针对工程拼焊板不同的焊缝形式,利用Dynaform软件对拼焊板进行了拉延模拟,分析了不同焊缝形式下拼焊板焊缝移动量和回弹量。结果表明:在同质同厚相同压边力下的拼焊板,焊缝硬化指数越大,拼焊板的回弹越大,回弹距离在不同的拉延深度下总体减小,而硬化指数对焊缝移动量并没有太大的影响。较小角度的折线与弧线和直线的焊缝移动量差别较小。对不同厚度的板材,厚侧板材在折线或圆弧凹向方向能降低拼焊板的回弹,拼焊板的成形性良好。
Aiming at different weld seam forms of engineering tailor welded blanks(TWB), drawing process of tailor welded blanks was simulated by using Dynaform software. The TWB weld seam movement and springback under different weld forms were analyzed. The results show that: under the same homology, same thickness and equal blank holder force, the greater the weld hardening index of TWBis, the greater the springback of TWBis. The springback distance is significantly reduced generally at different drawing depths, while the hardening index on the weld movement is not much impact. The weld movement difference of polyline weld seam with smaller angle, the arc and straight line is smaller. For the plates of different thicknesses, thick side plate in polyline and circular arc concave direction can reduce springback of tailor welded blanks, and its formability is good.
Aiming at different weld seam forms of engineering tailor welded blanks(TWB), drawing process of tailor welded blanks was simulated by using Dynaform software. The TWB weld seam movement and springback under different weld forms were analyzed. The results show that: under the same homology, same thickness and equal blank holder force, the greater the weld hardening index of TWBis, the greater the springback of TWBis. The springback distance is significantly reduced generally at different drawing depths, while the hardening index on the weld movement is not much impact. The weld movement difference of polyline weld seam with smaller angle, the arc and straight line is smaller. For the plates of different thicknesses, thick side plate in polyline and circular arc concave direction can reduce springback of tailor welded blanks, and its formability is good.
引文
[1]Veera Babu K,Ganesh Narayanan R,Saravana Kumar G.An expert s ystem based on artificial neural network for predicting the tensile behavior of tailor welded blanks[J].Expert Systems with Applications,2009,36(7):10683-10695.
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[3]张家骅,陈志祥,徐连强,等.曲线焊缝位置对拼焊板焊缝移动的影响规律研究[J].锻压技术,2013,38(6):156-159.
[4]林建平,胡巧声,鲍文华,等.曲线焊缝差厚拼焊板拉延性能研究[J].塑性工程学报,2007,14(6):63-67.
[5]韩佳.拼焊板帽形件弯曲焊缝移动及回弹控制[D].秦皇岛:燕山大学,2015.
[6]龚志辉,赵树武,钟剑,等.差厚拼焊板焊缝线偏移的控制研究[J].热加工工艺,2017,46(3):121-124.
[7]甘勇,王瀚超,郭颖颖,等.焊缝形式对拼焊板拉延性能的影响研究[J].锻压技术,2014,39(10):38-43.
[8]戴洪.前纵梁高强激光拼焊板全工序成形及回弹控制研究[D].重庆:重庆大学,2014.
[9]林建平,邢丹英,胡巧声,等.焊缝对拼焊板纵向拉伸成形性能的影响规律[J].同济大学学报(自然科学版),2010,38(9):1350-1353.
[10]孙新强.基于小波神经网络的板料拉延回弹研究[D].成都:西南交通大学,2015.
[11]Bandyopadhyay K,Basak S,Panda S K,et al.Use of stress based forming limit diagram to predict formability in two-stage forming of tailor welded blanks[J].Materials&Design,2015,67:558-570.
[2]Saunders F I,Wagoner RH.Forming of tailor-welded blanks[J].Metallurgical and Materials Transactions A,1996,27(9):2605-2616.
[3]张家骅,陈志祥,徐连强,等.曲线焊缝位置对拼焊板焊缝移动的影响规律研究[J].锻压技术,2013,38(6):156-159.
[4]林建平,胡巧声,鲍文华,等.曲线焊缝差厚拼焊板拉延性能研究[J].塑性工程学报,2007,14(6):63-67.
[5]韩佳.拼焊板帽形件弯曲焊缝移动及回弹控制[D].秦皇岛:燕山大学,2015.
[6]龚志辉,赵树武,钟剑,等.差厚拼焊板焊缝线偏移的控制研究[J].热加工工艺,2017,46(3):121-124.
[7]甘勇,王瀚超,郭颖颖,等.焊缝形式对拼焊板拉延性能的影响研究[J].锻压技术,2014,39(10):38-43.
[8]戴洪.前纵梁高强激光拼焊板全工序成形及回弹控制研究[D].重庆:重庆大学,2014.
[9]林建平,邢丹英,胡巧声,等.焊缝对拼焊板纵向拉伸成形性能的影响规律[J].同济大学学报(自然科学版),2010,38(9):1350-1353.
[10]孙新强.基于小波神经网络的板料拉延回弹研究[D].成都:西南交通大学,2015.
[11]Bandyopadhyay K,Basak S,Panda S K,et al.Use of stress based forming limit diagram to predict formability in two-stage forming of tailor welded blanks[J].Materials&Design,2015,67:558-570.