基于响应面法的连杆模锻成形载荷影响因素研究  

Affecting Factors of Forming Load of Connecting Rod Die Forging Based on Response Surface Method

作　　者：贾德文[1] 孙艳[1] 邓伟[1] 冀会平 王茜 彭益源[1,3] JIA De-wen;SUN Yan;DENG Wei;JI Hui-ping;WANG Xi;PENG Yi-yuan(Yunnan Key Laboratory of Internal Combustion Engines,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Xiyi Industry Co.,Ltd.,Kunming 650114,China;Kunming Yunnei Power Co.,Ltd.,Kunming 650200,China)

机构地区：[1]昆明理工大学云南省内燃机重点实验室,昆明650500 [2]云南西仪工业股份有限公司,昆明650114 [3]昆明云内动力股份有限公司,昆明650200

出　　处：《精密成形工程》2023年第5期193-201,共9页Journal of Netshape Forming Engineering

基　　金：云南省重大科技专项计划(202202AC080006)。

摘　　要：目的解决42CrMo连杆预锻成形过程中因成形载荷较大导致的模具损坏风险较大和使用寿命低的问题。方法构建连杆预锻成形的仿真模型,分析不同坯料温度、模具温度、模锻速度、摩擦因数对成形载荷的影响规律,基于Box–Behnken试验设计与响应面法对连杆预锻的成形载荷进行研究,并结合多岛遗传算法进行优化。结果在多因素交互下,各工艺参数按对成形载荷显著性影响由大到小的顺序依次为:坯料温度、摩擦因数、模锻速度、模具温度。当坯料温度为1190℃、模具温度为350.7℃、模锻速度为532.5 mm/s、摩擦因数为0.1时,成形载荷为3226.6 kN,相比原工艺的成形载荷降低了50.74%。模锻试验后成形效果较好,说明了优化工艺参数的合理性。结论优化后的工艺参数可使成形载荷明显降低,该研究可为连杆实际模锻成形的生产提供有效指导。The work aims to solve the high risk of die damage and low service life 42CrMo connecting rods due to the large forming load in pre-forging.The pre-forging simulation model of connecting rods was constructed,and the effect law of different billet temperature,die temperature,die forging speed and friction coefficient on forming load was analyzed.Based on the Box–Behnken test design and response surface method,the forming load of pre-forging was studied and optimized in combination with the multi-island genetic algorithm.The results showed that under the interaction of multiple factors,the order of the significant effect of each process parameter on the forming load was:billet temperature,friction coefficient,die forging speed,and die temperature.When the billet temperature was 1190℃,the die temperature was 350.7℃,the die forging speed was 532.5 mm/s,and the friction coefficient was 0.1,the forming load was 3226.6 kN,which was 50.74%lower than the original process.The forming effect after the die forging test was good,which showed the rationality of optimizing the process parameters.The optimized parameters can significantly reduce the forming load.This research can provide effective guidance for production in actual die forging forming of connecting rods.

关 键 词：连杆 成形载荷 响应面法 多岛遗传算法 

分 类 号：TG316[金属学及工艺—金属压力加工]