基于变形分析的叶片精锻模具预补偿方法  

Pre-compensation method of blade precision forging die based on deformation analysis

作　　者：胡学超 吕彦明 李彦奎 张星星 Hu Xuechao;Lyu Yanming;Li Yankui;Zhang Xingxing(Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology, Jiangnan University, Wuxi 214122 , China;Wuxi Turbine Blade Co., Ltd.,Wuxi214023 , China)

机构地区：[1]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [2]无锡透平叶片有限公司,江苏无锡214023

出　　处：《锻压技术》2019年第3期94-100,132,共8页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(61409230303);国家重点新产品开发计划(2010GRC10021)

摘　　要：采用热弹塑性有限元法,利用DEFORM-3D软件模拟叶片锻造过程中模具型面的弹性变形。分析了不同锻压步数下的模具型面的弹性变形量,并对Z=75 mm、Z=35 mm和Z=5 mm模具型面截面弹性变形量及变形规律进行了分析。分析结果表明,精锻完成后,模具型腔表面不同部位发生了不同程度的弹性变形,进出气边弹性变形量较小,叶身心部模具的弹性变形量大,最大为0. 2 mm。阐述了原始模具型面弹性补偿的必要性,分析了模具型面弹性补偿方法,提出了模具型面反向补偿法,利用UG二次开发技术,对叶片模具型面预补偿设计进行了参数化实现,分析了Z=75 mm、Z=35 mm和Z=5 mm的模具型面补偿效果。分析结果显示,叶片的最大偏差量不超过0. 02 mm。通过实验验证了模具表面补偿方法的准确性和可靠性。The elastic deformation of the mold profile during blade forging was simulated by the thermal elastoplastic finite element method and software DEFORM-3D,and the amount of elastic deformation of the mold profile under different forging steps was analyzed. Then,the amount of elastic deformation and deformation law of the mold profile with Z = 75 mm,Z = 35 mm and Z = 5 mm were analyzed,respectively. The analysis results show that after the precision forging,the different degrees of elastic deformation occur in different parts of the mold cavity surface,the amount of elastic deformation of the inlet and outlet air is small,and in the heart of the blade body reaches maximum 0. 2 mm. Then,the necessity of the elastic compensation of the original mold surface was expounded,and the elastic compensation method of the mold surface was analyzed to propose the reverse compensation method of the mold surface. Furthermore,the parameterized design of blade die surface pre-compensation was realized by UG secondary development technology,and the die surface compensation effects with Z = 75 mm,Z = 35 mm and Z = 5 mm were analyzed,respectively. Finally,the analysis results show that the maximum deviation of the blade does not exceed 0. 02 mm. The accuracy and reliability of the mold surface compensation method were verified by experiments.

关 键 词：航空叶片 精锻模具 弹性变形 模具补偿 数值模拟 

分 类 号：TG316.3[金属学及工艺—金属压力加工]