振动时效消除大型机床床身残余应力的研究  

Research on Vibration Aging on Eliminating Residual Stress of Large Machine Bed

作　　者：刘杨[1] 张宇[1] 钱海盛 郭汉德 胡敏敏[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500 [2]沈机集团昆明机床股份有限公司,云南昆明650203

出　　处：《热加工工艺》2016年第10期225-228,共4页Hot Working Technology

基　　金：国家重大科技专项(2012ZX04012-031)

摘　　要：使用有限元软件Ansys Workbench对机床床身进行模态分析,确定了激振频率、支撑点、激振点等工艺参数。对床身进行谐响应分析,得到床身在固定激振力作用下的动应力大小。结果显示,当激振力为40 kN时,床身产生的动应力符合振动时效要求。根据模态分析和谐响应分析得到的振动时效工艺参数,对机床床身进行振动时效试验。利用盲孔法对振动时效前后床身的残余应力进行测量,振动时效后床身的残余应力明显减小。Modal analysis of machine bed was done using the finite element analysis software Ansys Workbench, and process parameters such as exciting frequency, support point, exciting point, etc were determined. Harmonic response analysis of machine bed was done to get the dynamic stress under fixed vibration force. The results show that when the exciting force is 40 kN, the dynamic force of machine bed meets the requirements of vibration aging. According to the vibration aging process parameters obtained by modal analysis and harmonic response analysis, vibration aging test of machine bed was done. By using blind hole method to measure the residual stress of machine bed before and after vibration aging, the residual stress of bed after vibration aging was significantly decreased.

关 键 词：床身 振动时效 盲孔法 残余应力 

分 类 号：TG115[金属学及工艺—物理冶金]