锻压技术

硼钢A柱补丁板热冲压工艺数值模拟与实验研究

英文标题：Numerical simulation and experimental study on hot stamping process of A-pillar patch plate for boron steel

关键词：硼钢热冲压补丁板焊点厚度减薄率

分类号：TG156.3

出版年,卷(期):页码：2020,45(5):100-104

摘要：

为解决硼钢A柱补丁板热冲压工艺中的焊点优化布置问题，采用热-力耦合的方法建立硼钢A柱补丁板的热冲压分析模型。通过对主板和补丁板间定义点焊单元，实现补丁板的热冲压工艺分析。结果表明：在成形过程中，由于补丁区域板料厚度大于其他区域，导致补丁区域温度一直高于其他区域，对该区域的有效冷却是保证零件性能的必要条件。相比于单层板的热冲压工艺，补丁板在热冲压过程中焊点周围区域是破裂的危险区域。经过焊点优化布置后，原破裂区域的减薄率由34%降低为6%，加工50件仅出现1件焊点开裂，合格率为98%。对于补丁板的热冲压工艺，需要考虑焊点的优化布置来改善焊点周围的成形缺陷。

In order to solve the problem of optimal arrangement for welding spots in hot stamping process of A-pillar patch plate for boron steel, the analysis model of hot stamping for A-pillar patch plate of boron steel was established by the thermal-mechanical coupling method, and the analysis of hot stamping process for patch plate was realized by defining the welding spot elements between main plate and patch plate. The results show that during the forming process, the thickness of plate material in patch area is larger than that of the other areas, which results in the temperature of patch area being always higher than that of the other areas, and the effective cooling of patch area is a necessary condition to ensure the performance of parts. Compared with the hot stamping process of single-layer plate, the areas around the welding spots in patch plate are easy to fracture during the hot stamping process. After the optimal arrangement of welding spots, the thinning rate of the original fracture area reduces from 34% to 6%, only one piece cracks after processing fifty pieces, and the qualified rate is 98%. For the hot stamping process of patch plate, it is necessary to consider the optimal arrangement of welding spots to reduce the forming defects around the welding spots.

基金项目：

国家科技重大专项（2018ZX04023-002）

李彦波（1970-），男，学士，正高级工程师，E-mail：liyanbo@lygf.com

参考文献：

[1]徐伟力，管曙荣，艾健，等. 钢板热冲压新技术介绍[J]. 塑性工程学报，2009，16（4）：39-43.
Xu W L, Guan S R, Ai J, et al. Introduction of sheet metal hot-forming[J]. Journal of Plasticity Engineering, 2009, 16(4): 39-43.
[2]张永亮，李雪刚，张鑫. 高强度钢板热冲压成形研究与进展[J]. 汽车工艺与材料，2015，(2)：41-46,49.
Zhang Y L, Li X G, Zhang X. Research and development on hot stamping of high strength steel sheet[J]. Automotive Technology & Material, 2015, (2):41-46,49.
[3]Karbasian H，Tekkayaa E. A review on hot stamping[J]. Journal of Material Processing Technology, 2010, 210(15):2103-2118.
[4]Hipchen P, Lipp A，Grass H，et al. Modelling kinetics of phase transformation for the indirect hot stamping process to focus on car body parts with tailored properties[J]. Journal of Material Processing Technology, 2016，228：59-67.
[5]Merklein M，Wieland M，Lechner M，et al. Hot stamping of boron steel sheets with tailored properties: A review[J]. Journal of Material Processing Technology, 2016，228: 11-24.
[6]Merklein M，Lechler J，Stoehr T. Investigations on the thermal behavior of ultra high strength boron manganese steels within hot stamping[J]. International Journal of Material Forming, 2009，2：259-262.
[7]George R, Bardelcik A, Worswick M J. Hot forming of boron steels using heated and cooled tooling for tailored properties[J]. Journal of Material Processing Technology, 2012, 212(11): 2386-2399.
[8]Bardelcik A, Salisbury C P, Winkler S, et al. Effect of cooling rate on the high strain rate properties of boron steel[J]. International Journal of Impact Engineering, 2010, 37(6): 694-702.
[9]Bardelcik A, Worswick M J, Wells M A. The influence of martensite, bainite and ferrite on the as-quenched constitutive response of simultaneously quenched and deformed boron steel-experiments and model[J]. Materials and Design, 2014, 55:509-525.
[10]张自强，刘翔，汪浩. 面向轻量化的TRB结构碰撞性能研究[J].锻压技术，2018，43（9）：146-156.
Zhang Z Q, Liu X, Wang H. Research on crashworthiness of TRB structure for lightweight[J]. Forging & Stamping Technology, 2018, 43(9): 146-156.
[11]Lei C X，Xing Z W，Xu W L，et al. Hot stamping of patchwork blanks: Modeling and experimental investigation[J]. International Journal of Advanced Manufacturing Technology, 2017，92：2609-2617.
[12]王晨磊，吴彦骏，徐伟力，等. 补丁版B柱热成形仿真分析及实验研究[J]. 模具技术，2016，(6)：10-13.
Wang C L, Wu Y J, Xu W L, et al. Simulation and experiment of patchwork B-pillar hot stamping[J]. Die and Mould Technology, 2016, (6): 10-13.
[13]Oberpriller B, Burkhardt L, Griesbach B. Benchmark 3-continuous press hardening part A: Physical tryout report[A]. Proceedings of the 7th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes[C]. Interlaken，2008.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】