Transactions of Materials and Heat Treatment

Title：Numerical simulation of crankshaft hot forging process and tracking analysis of center loose area

Authors： Zhu Meiling Chen Xuewen Sun Lemin He Junguang Zhou Huijun

Unit： Henan University of Science and Technology

KeyWords： six throw crankshaft finite element simulation metal flow magnetic particle indication

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2014,39(8):146-149

Abstract：

Taking six throw crankshaft for an example, the temperature field, strain field and metal flow in hot forging process of crankshaft were simulated by using the finite element simulation software of Transvalor Forge-3D. The results show that, the temperature of flash parting surface is significantly higher, the strain value is larger, the plastic deformation is more intense, and the metal flow is more complex than the ones in inner region of workpiece. The metal flow in the hot forging process was observed in three dimensions, and it is found that the center sub-prime layer metal is easy to flow into the inside of axle journal during hot forging process, so the center sub-prime layer metal is exposed to the surface or near surface of forgings, and the magnetic particle indication appears. The predicted location where the magnetic particle indication occures in this research fits well with the practical case, and the measures such as modifying the preforming die cavity size and improving the forging temperature to prevent the magnetic particle indication were put forward.

Funds：

河南省重点科技攻关计划项目（132102210119）

朱美玲（1989-），女，硕士研究生；陈学文（1970-），男，博士，教授

Reference：

［1］焉永才. 成品曲轴分模面磁痕分析 [J]. 金属加工（热加工），2008, (21):43-46.Yan Y C. Analysis of magnetic marks on the finished crankshaft parting [J]. Machinist Metal Forming, 2008, (21):43-46.
［2］张光华. 相位角120°锻造曲轴探伤磁痕产生机理及减轻办法[D].重庆：重庆大学, 2013.Zhang G H. Formation Mechanism and Mitigation Methods of the Magnetic Particle Indication on Crankshaft with 120°Phase Angle [D]. Chongqing: Chongqing University, 2013.
［3］周杰，张光华，权国政. 曲轴热锻中表层局部微米级裂纹产生机理[J]. 农业机械学报, 2011,42(6): 230-235.Zhou J, Zhang G H, Quan G Z. Mechansim of micron dimension crack appeared on surface layer of crankshaft during forging [J]. Journal of Agricultural Machinery, 2011,42(6):230-235.
［4］康海鹏. 基于Forge2D/3D的阀体胎模锻模拟分析[J]. 热加工工艺, 2012, 41(1): 86-92.Kang H P. Simulation of die-forging for valve based on forge 2D/3D [J]. Hot Working Technology, 2012, 41(1):86-92.
［5］陈学文，王博. 传动轴多工位锻造过程数值模拟及工艺优化[J]. 锻压技术, 2013, 38(4):6-10.Chen X W, Wang B. Numerical simulation and optimization for drive shaft multi-station forging process [J]. Forging & Stamping Technology, 2013, 38(4):6-10.
［6］陈志仁. 曲轴锻造过程金属流动与微观组织演化规律的数值模拟研究[D].济南：山东大学，2013.Chen Z R. Study on Numerical Simulation of Metal Flow and Microstructure Evolution of a Crankshaft Forging Process [D]. Jinan: Shandong University, 2013.
［7］Banaszek G, Berski S. Theoretical modelling of metallurgical defect closing-up processes during forming a forging[J]. Journal of Iron and Steel Research (International),2013, 20(9):111-116.
［8］焉永才. 大型曲轴镦锻成形的有限元模拟分析[J]. 锻压技术, 2011, 36(3):148-152.Yan Y C. FE simulation analysis of large crankshaft upsetting formation [J]. Forging & Stamping Technology, 2011, 36(3):148-152.
［9］刘必荣. 小型柴油机曲轴表面缺陷磁粉探伤[J]. 表面技术2004,33(3):67-69.Liu B R. Surface disfigurement detection of magnetic powder to mini-diesel crankshaft [J]. Surface Technology, 2004, 33(3):67-69.
［10］Zhang Y J, Hui W J, Dong H. Hot forging simulation analysis and application of micro-alloyed steel crankshaft [A]. Proceedings of Sine-Swedish Structural Materials Symposium 2007[C]. Swedish, 2007.
［11］黄光法. 大挤压比铝型材挤压过程的数值模拟[J]. 中国有色金属学报, 2006, 16(5):887-895.Huang G F. Numerical simulation of extrusion process of aluminum profile with large extrusion ratio [J]. The Chinese Journal of Nonferrous Metals, 2006, 16(5):887-895.

Service：

【This site has not yet opened Download Service】【Add Favorite】