热缩刀杆的装刀疲劳特性研究

Clamping fatigue analysis of shrink-fit holder

为探究热缩刀杆的装刀疲劳特性,利用ANSYS软件分析了热缩刀杆装夹过程中的热应力与接触应力,并综合两者选定危险区对其进行了疲劳分析。试制了一种数控热缩刀杆装刀疲劳试验装置,实现了对热缩刀杆进行自动化装夹;在该装置上每装夹500次热缩刀杆后,用热缩刀杆进行一次铣削试验,采集和分析加工时工件的振动信号并测量和分析工件表面粗糙度,分析不同装夹次数下热缩刀杆加工性能的变化,对比验证有限元疲劳分析的准确性。

In order to explore the clamping fatigue characteristics of shrink-fit holder,ANSYS software was used to analyze the thermal stress and contact stress during the clamping process of the shrink-fit holder,and the fatigue analysis was performed by selecting the dangerous areas based on the two stresses.A numerical control shrink-fit holder fatigue test device was manufactured,and the automatic clamping of the shrink-fit holder was realized.Performing a milling test on the shrink-fit holder for each 500 clamping times.By collecting the vibration signal of the workpiece during processing and measuring the change in the surface roughness of the workpiece,and then analyzing the change in the machining performance of the shrink-fit holder under different clamping times,the accuracy of the finite element fatigue analysis is compared and verified.