颤振冷挤压振动台设计与振动特性研究  

Design and research of vibration characteristic of flutter cold extrusion vibration platform

作　　者：杨庆华[1] 夏航[1] 王志恒[1] 鲍官军[1] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2015年第1期24-29,共6页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(51275475);浙江省科技厅基金资助项目(2012C21112)

摘　　要：针对冷挤压成形过程中变形抗力大、易产生挤压不充分的问题,设计了一种新型颤振冷挤压振动台.利用ANSYS软件建立了有限元分析模型,分析确定了振动台安全有效的工作方式,研究了输入油压、振动台加载、弹性端盖凹槽中心半径、弹性端盖凹槽开口高度、弹性端盖凹槽开口圆弧半径等五项振动台振幅影响因素与振幅的数值关系及敏感度,建立了输入-输出的仿真二元插值模型,并通过实验修正模型.实验结果表明:冷挤压过程中振动台振幅共有五个阶段,修正后的模型能有效仿真振动台振幅.研究结果表明:所设计的振动台满足颤振冷挤压成形需要,通过改变振幅影响因素能改善振动台振动特性.To reduce the problems of large resistance to deformation and inadequate extrusion,a new flutter vibration platform of cold extrusion was designed.Finite element analysis model was established with ANSYS,the safe and effective working way of the vibration platform was analyzed and determined,the sensitivity and the relationship between five factors of amplitude of the vibration platform such as input oil pressure,loaded on vibration platform,radius of groove center of elastic end cover,groove opening height of elastic end cover,the radius of circular arc groove openings of elastic end cover and amplitude values was researched,the bivariate interpolation model of input-output is established and be validated by experiments. The experimental results indicate that the amplitude of the vibration platform during the cold extrusion process is divided into five phases,and prove that the bivariate interpolation model can simulates amplitude of the vibration platform effectively.Experimental research proves the designed the vibration platform meets the need of flutter cold extrusion forming,and changing amplitude factors can improve vibration characteristics of the vibration platform.

关 键 词：颤振 冷挤压 有限元分析 二元插值模型 振动特性 

分 类 号：TG376.3[金属学及工艺—金属压力加工] TB534.2[理学—物理]