锻压技术

基于Dynaform的Strenx960高强钢折弯工艺影响因素分析

英文标题：Analysis on influencing factors of bending process for Strenx960 high-strength steel based on Dynaform

作者：魏子豪朱春东郑淇文石磊

关键词：Strenx960高强钢折弯开裂回弹 Dynaform

分类号：TG386.1

出版年,卷(期):页码：2020,45(12):78-84

摘要：

使用瑞典先进高强钢Strenx960作为伸缩臂制造材料，为了更好地研究多种工艺参数对Strenx960高强钢折弯工艺的影响规律，以Strenx960高强钢为研究对象，采用有限元分析和实际试验相结合的方法进行研究。根据Strenx960高强钢的材料参数，建立了自由折弯有限元模型，研究了凸模圆角半径、板料厚度、摩擦系数对折弯开裂及回弹的影响规律。结果表明：回弹角大小与凸模圆角半径成正比、与板料厚度和摩擦系数成反比；板料开裂主要与凸模圆角半径和板料厚度有关，凸模圆角半径越小，板料越易开裂，板料越厚，开裂的风险越大；摩擦系数对板料开裂的影响较小。通过实际试验验证，Strenx960高强钢折弯试验结果与有限元模拟结论基本一致。

The Swedish advanced Strenx960 high-strength steel is used as the manufacturing material of telescopic boom. For Strenx960 high-strength steel, the influence laws of various process parameters on the bending process for Strenx960 high-strength steel were studied by combining finite element analysis with actual test. According to material parameters of Strenx960 high-strength steel, the finite element model of free bending was established, and the influence laws of fillet radius of punch, plate thickness and friction coefficient on bending cracking and springback were studied. The results show that the springback angle is proportional to the fillet radius of punch and inversely proportional to the plate thickness and the friction coefficient. Furthermore, the sheet metal cracking is mainly related to the fillet radius of punch and the plate thickness. The smaller the fillet radius of punch is, the easier the sheet metal cracking is. The thicker the sheet metal is, the greater the risk of cracking is. In addition, the friction coefficient has little influence on the sheet metal cracking. Thus, through the actual test verification, the bending test results of Strenx960 high-strength steel are basically in agreement with the FEM simulation conclusions.

基金项目：

随州市新能源、轻量化、智能化关键核心技术研发项目(随科发［2019］9号)

魏子豪（1996-），男，硕士研究生 E-mail：weizihao1120@163com 通讯作者：朱春东（1963-），男，硕士，教授 E-mail:zcdzcd6252@sinacom

参考文献：

［1］周鲜平.提高吊臂折弯精度的工艺措施
［J］.精密成形工程,2017,9(4):135-137.

Zhou X P. Technical measures to improve the bending precision of boom
［J］.Journal of Netshape Forming Engineering, 2017, 9(4): 135-137.

［2］张永良,李勇,李贺德.高强度板材折弯工艺性研究
［J］.金属加工：热加工, 2016，(7): 55-59.

Zhang Y L, Li Y, Li H D. Bending technology of high strength sheet
［J］.MW Metal Forming, 2016，(7): 55-59.

［3］韩飞,杨河,满力群.形变强化对车用超高强钢型材力学性能的影响
［J］.塑性工程学报,2014,21(6):102-107.

Han F, Yang H, Man L Q. Effect of strain hardening on mechanical properties of ultra-high strength steel component for vehicle
［J］.Journal of Plasticity Engineering, 2014, 21(6): 102-107.

［4］吴斌,曹志福.超高强钢板U形件热冲压回弹研究
［J］.热加工工艺,2016,45(11):140-143.

Wu B, Cao Z F. Study on springback of hot stamping of ultra high strength steel plate U-shape part
［J］. Hot Working Technology, 2016,45(11):140-143.

［5］张正群,邵建平,汪健宏,等.高强汽车大梁钢折弯开裂原因分析
［J］.物理测试,2019,37(2):50-53.

Zhang Z Q, Shao J P, Wang J H，et al. Analysis of craking of high strength auto beam steel during bending
［J］.Physics Examination and Testing, 2019, 37(2): 50-53.

［6］吴信涛,丁方强,刘国凯,等.DP800双相高强钢折弯及回弹研究
［J］.精密成形工程,2016,8(4):38-42.

Wu X T, Ding F Q, Liu G K, et al. Bending and springback of high-strength dual phase steel DP800
［J］. Journal of Netshape Forming Engineering, 2016, 8(4):38-42.

［7］陈立伟,朱春华,王新明,等.双相钢回弹的有限元模拟及工艺优化
［J］.热加工工艺,2019,48(1):139-141.

Chen L W, Zhu C H, Wang X M, et al. Finite element simulation and process optimization of dual-phase steel springback
［J］. Hot Working Technology, 2019, 48(1):139-141.

［8］石磊,肖华,陈军,等.先进高强度钢板弯曲类回弹特性的试验研究
［J］.材料科学与工艺,2009,17(5):671-674，679.

Shi L, Xiao H, Chen J, et al. Experimental research of the bending springback property on advanced high strength steel
［J］. Materials Science and Technology, 2009,17(5):671-674，679.

［9］段永川,张芳芳,杨柳,等.高强钢板自由弯曲回弹反馈控制研究
［J］.塑性工程学报,2018,25(6):1-6.

Duan Y C, Zhang F F, Yang L, et al. Research on springback feedback control of high strength steel air bending
［J］. Journal of Plasticity Engineering, 2018,25(6):1-6.

［10］Pinson M, Springer H, Depover T, et al. Qualification of the in-situ bending technique towards the evaluation of the hydrogen induced fracture mechanism of martensitic Fe-C steels
［J］. Materials ence and Engineering: A,2020,792:754-761.

［11］窦龙龙. V形自由折弯成形技术研究和控制实现
［D］. 合肥: 合肥工业大学,2019.

Dou L L. Research and Control Realization of V-Shape Free Bending Forming Technology
［D］. Hefei: Hefei University of Technology, 2019.

［12］张逸. 金属板料自由折弯模型与实验研究
［D］.武汉：华中科技大学,2012.

Zhang Y. Free Bending Model and Experimental Study of Metal Sheet
［D］. Wuhan：Huazhong University of Science and Technology, 2012.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】