内燃机曲轴振动时效工艺分析与装置设计  

Crankshaft Vibratory Stress Relief Process Analysis and Device Design

作　　者：蔡敢为[1] 黄院星[1] 李岩舟[1] 

机构地区：[1]广西大学机械工程学院,南宁530004

出　　处：《振动．测试与诊断》2013年第S1期97-101,222,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：广西理工科学实验中心重点项目(LGZX201201);南宁市科学研究与技术开发计划资助项目(201102091G)

摘　　要：分析了振动时效处理消除曲轴残余应力效果不好的原因,以某型号内燃机曲轴为研究对象,设计了新的工艺和装置,对采用该工艺的振动时效处理装置进行计算机仿真。分析结果表明,该工艺和装置能够在偏心激振器的激振频率范围内使曲轴产生共振,可有效消除曲轴的残余应力,对大批量曲轴生产中振动时效工艺的制定提供了一定的理论依据,具有一定工程意义。Crankshaft is one of the significant parts of internal combustion engines, residual stress will be produced in each manufacturing process such as casting, heat treatment, machining and chemical heat treatment. The existence of residual stress can reduce the stability of crankshaft′s dimension. The vibration will influence the structure of the internal combustion engine, fatigue failure may occur during service. Therefore, the residual stress must be relieved. Thermal aging treatment is usually utilized to relieve the residual stress in practical engineering applications. This conventional method can eliminate most of the residual stress, but there are also some drawbacks. Vibratory stress relief is also an effective method, there are some improper processes and devices produce little effect. To meet this problem, the paper analysis the reasons that the traditional methods can not eliminate residual stress effectively. New process and new device base on a certain model of crankshaft are proposed. In this paper, the new vibration system will be simulated, including modal analysis and harmonic response analysis. Computer simulation result demonstrates that the residual stress in the crankshaft can be eliminated effectively by eccentric vibration exciter. The proposed process and device are examined by experiment. Relevant conclusions will be published in another paper.

关 键 词：振动时效 内燃机曲轴 工艺分析 装置设计 模态分析 谐响应分析 

分 类 号：TK406[动力工程及工程热物理—动力机械及工程]