超声振动辅助孔挤压强化装置研制及试验

Development and Test of Ultrasonic Vibration Auxiliary Cold Extrusion Strengthening Device

为探究超声振动辅助孔挤压强化工艺,设计超声振动辅助孔挤压强化装置。利用ANSYS软件对设计的装置进行模态分析,测量装置的谐振频率及位移,开展孔结构件挤压强化试验。研究结果表明:模态分析中装置的谐振频率为25 542.5 Hz,测试装置的谐振频率为26 918 Hz,相对误差为5.39%;测量装置中挤压芯棒工作环部位的位移,其最大值为3.38μm;与无超声挤压强化相比,超声挤压强化后孔壁表面粗糙度降低程度大,装配孔直径增加范围为6~17μm。

In order to explore the ultrasonic vibration assisted cold extrusion strengthening process,an ultrasonic vibration auxiliary cold extrusion strengthening device is designed.ANSYS software is applied to perform modal analysis on the designed device,the resonant frequency and displacement of the device are measured,and cold extrusion strengthening test is carried out.The research results show that resonant frequency of the device in the modal analysis is 25542.5 Hz,resonant frequency of the test device is 26918 Hz,and the relative error is 5.39%.For the displacement of the working ring of the extruded mandrel in the measuring device,the maximum value is 3.38μm.Compared with no ultrasonic extrusion strengthening,the surface roughness of the hole wall is greatly reduced after the ultrasonic extrusion strengthening,with an increase of 6~17μm in assembly hole diameter.