Numerical simulation of the roller hemming process based on pressure-viscosity effect

被引：2
作者：
Li Jianjun
Zhu Wenfeng
机构：
[1] Tongji University,School of Mechanical Engineering
来源：
The International Journal of Advanced Manufacturing Technology | 2019年 / 105卷
关键词：
Roller hemming; adhesive; SPH; Pressure-viscosity effect;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the roller hemming process, the high-viscosity adhesive has affected the forming process of metal sheets, especially lightweight materials. However, the effect and mechanism are not clear. In this paper, the hemming adhesive is taken as a viscous Newtonian fluid. First of all, the pressure-viscosity effect in the model of parallel-panel squeeze is investigated, while the adhesive flow is simulated by smooth particle hydrodynamics (SPH) method, and the results are compared and verified by analytical solutions. Then, the roller hemming process of aluminum alloy sheet AA6106-T4 with adhesive is simulated by using the fluid-solid coupling method, while the adhesive is modeled by SPH and the aluminum alloy sheet is modeled by finite element method (FEM). The accuracy of the simulation model is verified by a comparison of roll-in/out in experiment and the effect and mechanism is studied based on the pressure-viscosity effect. The results show that adhesive thickness is the most important factor of the pressure-viscosity effect. The roll-in value of aluminum alloy sheet sample with 0.2-mm thick adhesive is relatively less than that without under the same conditions, and the roll-in of aluminum alloy sheet raises with an increase of the adhesive layer thickness. The evaluated roll-in/out of samples with different thickness of adhesive can obtain zero value theoretically after final hemming.
引用
收藏
页码：1023 / 1039
页数：16
相关论文
共 95 条
[1]  
Muderrisoglu A(1996)Bending, flanging and hemming of aluminum sheet-an experimental study J Mater Process Technol 59 10-17
[2]  
Murata M(2006)Analysis, characterization and accuracy improvement of optical coordinate measurement systems for car body assembly quality control Int J Adv Manuf Technol 30 1174-1190
[3]  
Ahmetoglu M(2003)A study on fundamental mechanisms of warp and recoil in hemming J Eng Mater Technol 123 436-441
[4]  
Kinzel G(2000)improvement of hem quality by optimizing flanging and pre-hemming operations using computer aided die design J Mater Process Technol 98 41-52
[5]  
Altan T(2004)Experimental investigation of forming defects in flat surface-convex edge hemming J Mater Process Technol 146 20-27
[6]  
Aguilar JJ(2004)Experimental investigation of forming defects in flat surface-convex edge hemming: roll, recoil and warp J Mater Process Technol 153 913-919
[7]  
Sanz M(2008)Numerical simulation of the roller hemming process J Mater Process Technol 198 226-233
[8]  
Guillomia D(2012)Numerical analysis of the roller hemming process Int J Adv Manuf Technol 62 543-550
[9]  
Lope M(2011)Fracture limit prediction for roller hemming of aluminum alloy sheet Mater Des 31 1410-1416
[10]  
Bueno I(2005)A computational design-of-experiments study of hemming processes for automotive aluminium alloys Proc IMechE B J Eng Manuf 219 711-722
12345678910