液力变矩器叶轮重力铸造和低压铸造工艺对比与验证  

Comparison and Verification of Gravity Casting and Low Pressure Casting for Torque Converter Impeller

作　　者：沙宇 闫清东[1,2] 刘城[1,3] 魏巍[1,4] SHA Yu;YAN Qing-dong;LIU Cheng;WEI Wei(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081;Advanced Technology Research Institute,Beijing Institute of Technology,Jinan,Shandong 250300;National Key Laboratory of Vehicular Transmission,Beijing Institute of Technology,Beijing 100081;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401122)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]北京理工大学济南前沿技术研究院,山东济南250300 [3]北京理工大学车辆传动重点实验室,北京100081 [4]北京理工大学重庆创新中心,重庆401122

出　　处：《液压与气动》2024年第2期10-17,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51475041,51805027);国家部委基础产品创新计划(237099000000170009);重点实验室基金(202320301118)。

摘　　要：以某型铸造型液力变矩器为研究对象,对比其重力铸造和低压铸造两种常用铸造方式的成型质量。应用铸造工艺仿真软件ProCAST进行了充液和凝固过程的仿真及铸造缺陷的评估及对比分析。在此基础上,将预测的缺陷与实际浇铸产品射线无损探伤结果进行对比验证。结果表明,相比于重力铸造,低压铸造可以通过调整压力实现对液流充型过程的控制,使得充型平稳、顺序凝固、补缩动力增强,提高液力变矩器的力学性能。实际浇铸及探伤结果表明,铸造仿真可以较好地预测缺陷种类及分布,为铸造工艺改进提供有效指导。Taking a cast torque converter as the research object,the molding quality of two common casting methods,gravity casting and low pressure casting,were compared.The simulation of liquid filling and solidification process and the evaluation and comparative analysis of casting defects were carried out by using the casting process simulation software ProCAST.On this basis,the predicted defects are compared with the results of radiographic nondestructive testing of actual cast products.The results show that compared with gravity casting,low-pressure casting can control the liquid flow filling process by adjusting the pressure,make the filling stable,sequential solidification,enhance the feeding power,and improve the mechanical properties of hydraulic torque converter.The actual casting and flaw detection results show that the casting simulation can better predict the types and distribution of defects,and provide effective guidance for the improvement of casting process.

关 键 词：液力变矩器 铸造方法 铸造缺陷 数值分析 

分 类 号：TH137[机械工程—机械制造及自动化] TG244[金属学及工艺—铸造]