锻压技术

全纤维曲轴锻件曲柄臂平衡块安装面形状数值模拟

英文标题：Numerical simulation of crankweb counterweight mounting surface for continuous grain flow crankshaft

作者：李六如杜绍贵

分类号：全纤维曲轴锻件；平衡块安装面；数值模拟

出版年,卷(期):页码：2016,41(2):148-152

摘要：

采用弯曲镦锻法锻造中高速柴油机曲轴时，曲轴锻件曲柄臂安装面极易出现塌角缺陷。针对平衡块安装面为平面类型的曲柄臂，以16V240曲轴为研究对象，设计了4种平衡块安装面形状的曲柄臂锻件，并采用有限元法模拟了6V240曲轴锻件4种方案的RR法镦锻成形过程。从镦锻过程金属坯料的流动速度和速度矢量方向两个方面讨论了4种平衡块安装面形状对曲柄臂锻件成形质量的影响，模拟结果表明，设计为收敛形状的平衡块安装面在锻造过程中能有效避免塌角缺陷。根据方案4的模拟结果优化设计了模具并进行了曲轴单拐的挤压实验，实验结果与数值模拟结果基本一致。

The underfill defect is easy to appear on the mounting surface of crankweb when the crankshaft of high speed diesel engine is forged by bending and upsetting method. For the planar mounting surface of crankweb 16V240, a crankweb forge piece with four different shapes of mounting surface was designed, and their forging processes with RR forging method were simulated by FE method respectively. The influences of the four shapes of counterweight mounting surface on the forging quality of crankweb were analyzed by the flow velocity and velocity vector of metal blank during the forging process. The simulation results show that the convergence shape of mounting surface can avoid the underfill defect efficiently during the forging process. New die was optimally designed in accordance with the simulation results of plan No.4, and the extrusion test of single crank was carried out, which shows that the testing result is basically identical with the numerical simulation result.

基金项目：

李六如（1978－），男，硕士，工程师

参考文献：

[1]万煦义，大中型全纤维曲轴锻造方法的探讨[J].大型铸锻件，2006，（3）：45-52.Wan X Y.The exploration of the forging method for the large-middle size continuous grain flow crankshaft[J]. Heavy Castings and Forgings，2006，（3）：45-52.

［2］徐戊矫,朱若岭,周杰.大型船用曲轴TR法镦锻成形缺陷分析与工艺优化[J].热加工工艺,2010, 39 (7):155-158.Xu W J, Zhu R L, Zhou J. Forming defect analysis and process optimization of heavy marine crankshaft formed by TR upsetting-bending [J]. Hot Working Technology, 2010, 39 (7):155-158.

[3]康凤，杨鄂川，陈强，等.车用曲轴弯曲镦锻成形工艺模拟及试验研究[J].锻压技术，2014,39(11):135-138.Kang F,Yang E C,Chen Q,et al.Simulation and experiment study on upset-bending forging process of crankshaft in automobile[J].Forging & Stamping Technology, 2014，39(11):135-138.

[4]樊志江，孙丹凤，大型全纤维曲轴平衡块成形塌角问题研究[J].大型铸锻件，2009，（4）：19-21.Fan Z J,Sun D F. Research on the upset forging sunk defects of large full fiber crankshaft's balance block [J].Heavy Castings and Forgings, 2009，（4）：19-21.

[5]李六如，杜绍贵，毛章雄，等，机车曲轴RR法镦锻成形工艺模拟研究[J].金属加工：热加工，2011，（23）：22-24. Li L R, Du S G, Mao Z X，et al. Process simulation studies for locomotive crankshaft upset forged by RR method [J]. Metal Working-Hot Working, 2011，（23）：22-24.

[6]李六如，杜绍贵，付雪梅. RR装置上曲轴镦锻工艺优化研究[J].精密成形工程，2011，3（5）：5-8.Li L R,Du S G,Fu X M. Forging process optimization study of crankshaft on RR device[J]. Journal of Netshape Forming Engineering, 2011，3（5）：5-8.

[7]吕炎.锻压成形理论与工艺[M].北京：机械工业出版社，1991.Lv Y. Forging Forming Theory and Technology [M]. Beijing: China Machine Press, 1991.

[8]陈慧琴，刘建生，郭会光，12V240曲轴弯曲镦锻成形模具结构设计的改进[J].模具技术，2001，（6）：13-45. Chen H Q, Liu J S, Guo H G. Improvement of die structure design for 12V240 crankshaft bending upsetting-forming[J].Die and Mould Technology, 2001，（6）：13-45.

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