|
摘要：
|
|
在四辊卷板机卷制板材过程中，板材宽度变化会影响卷板质量。以弹塑性双线性硬化模型作为基础理论，推导出板材宽度、曲率和弯矩关系，建立四辊卷板滚弯过程数学模型，得到成形曲率与侧辊进给量的计算公式，并根据理论结果分析了板材宽度效应对板材滚弯过程的影响规律。结果表明：在宽板中心处，存在不利的双向拉伸条件，增加了板材的成形难度，宽度变化影响卷板的最小弯曲半径；随着板材宽度增加，板材所需成形力与驱动扭矩增加，筒体容易产生桶状变形。对板材四辊滚弯过程进行有限元仿真，结果表明：通过对宽板进行多道次滚弯，可以减小板材最大应力、轴辊成形力和驱动扭矩，有效控制板材宽度效应对四辊卷板成形过程的影响。
|
|
In the forming process of four-roller bending plate, the variation of plate width affects the quality of bending plate. Based on the elastoplastic bilinear hardening model, the relational formula between plate width, curvature and bending moment was derived, and the mathematical model of bending process for four-roller bending plate was established. Then, the calculation formula of forming curvature and side roller feeding amount was obtained, and according to the theoretical results, the influence of plate width effect on the bending process of plate was analyzed. The result shows that in the center of wide plate, there are unfavorable biaxial stretching conditions to increase the forming difficulty of plate, and the plate width variation affects the minimum bending radius of plate. With the increasing of plate width, the forming force and driving torque required for plate increase, and the barrel is prone to barrel deformation. Furthermore, the forming process of four-roller bending plate was simulated. And the finite element simulation result shows that the maximum stress of plate, the forming force of roller and the driving torque are reduced by multi-pass rolling of wide plate, and the influence of plate width effect on the forming process of four-roller bending plate is effectively controlled.
|
|
基金项目：
|
|
国家国际科技合作专项项目（2015DFR70090）
|
|
作者简介：
|
|
周晗琼（1996-），女，硕士研究生，E-mail：576092306@qq.com；通讯作者：武凯（1972-），男，博士，教授，E-mail：wukai@njust.edu.cn
|
|
参考文献：
|
[1]宋坤，武凯，刘庆印，等. 四辊卷板成形过程理论分析与数值仿真[J].锻压技术，2017，42（1）：137-142.
Song K，Wu K，Liu Q Y，et al. Theoretical analysis and numerical simulation on four-roll rolling process[J].Forging & Stamping Technology，2017，42（1）：137-142.
[2]孙士昆.当前数控技术和装备的发展趋势[J].河北建筑工程学院学报，2006，24(1):91-92.
Sun S K. On tendency of the development in current numerical control technology and equipments[J]. Journal of Hebei Institute of Architectural Engineering, 2006, 24(1):91-92.
[3]仉志强,付建华,宋建丽,等.厚向强度分布对特厚板三辊预弯成形的影响[J]. 吉林大学学报：工学版, 2015, 45(3): 878-883.
Zhai Z Q, Fu J H, Song J L, et al. Influence of material strength distribution along thickness on three-roller edge pre-bending of thick plate [J]. Journal of Jilin University：Engineering and Technology Edition, 2015, 45(3): 878-883.
[4]乔波,雷步芳,付建华,等.对称式三辊卷板机厚板压弯工艺参数分析[J]. 重型机械，2013,（2）：32-36.
Qiao B, Lei B F, Fu J H, et al. Analysis of process parameters of symmetrical three-roll veneer reeling machine for thick plate [J]. Heavy Machinery, 2013,（2）: 32-36.
[5]周迟,孙宇,刘庆印,等.四辊连续滚弯侧辊位移计算与数值模拟[J]. 锻压技术，2017，42（7）:36-41.
Zhou C, Sun Y, Liu Q Y, et al. Calculation of displacement and numerical simulation on side roller in four-roller continuous roll bending [J]. Forging & Stamping Technology, 2017, 42(7): 36-41.
[6]赖松柏，陈同祥,于登云.滚弯成形解析建模与数值分析[J].宇航材料工艺，2011，41(5)：18-22.
Lai S B, Chen T X, Yu D Y. Analytical modeling and simulation of roll-bending process[J]. Aerospace Materials & Technology, 2011, 41 (5): 18-22.
[7]余同希.塑性弯曲理论及其应用[M].北京：科学出版社，1992.
Yu T X. Plastic Bending Theory and Its Application[M]. Beijing: Science Press, 1992.
[8]Lin Y H, Hua M, Influence of strain hardening on continuous plate roll bending process[J]. International Journal of Mechanical Sciences, 2000, 35(5):883-896.
[9]Hua M, Lin Y H. Large deflection analysis of elastoplastic plate in steady continuous four-roll bending process[J]. International Journal of Mechanical Sciences, 1999, 41(12): 1461-1483.
[10]胡世光，陈鹤峥，李东升，等. 钣料冷压成形的工程解析[M]. 2版.北京：北京航空航天大学出版社，2009.
Hu S G, Chen H Z, Li D S, et al. Engineering Analysis of Cold Pressing for Sheet [M]. The 2nd Edition. Beijing: Beihang University Press, 2009.
[11]曹金凤，石亦平.ABAQUS有限元分析常见问题解答[M]. 北京：机械工业出版社，2009.
Cao J F, Shi Y P. Frequently Asked Questions about ABAQUS Finite Element Analysis[M]. Beijing：China Machine Press，2009.
[12]王昌，赵红坡，陆家山. 卷板机辊筒的优化分析[J]. 锻压技术，2017，42（3）：114-118.
Wang C，Zhao H P，Lu J S. Optimization analysis for the rollers of bending machine [J]. Forging & Stamping Technology，2017，42（3）：114-118.
[13]贾玉斌，刘世红.卷板弯曲变形的原因与对策[J]. 金属加工：热加工，2006，（5）：87-88.
Jia Y B, Liu S H. Reasons of bending deformation in sheet rolling & countermeasures[J]. MW Metal Forming, 2006, (5):87-88.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
