超声滚压装置设计及试验研究

The Design of Ultrasonic Rolling Device and the Study of Experiment

设计了一种新的超声滚压装置,并利用该装置研究了超声滚压加工对18CrNiMo7-6齿轮钢表面性能的影响。首先对滚压装置进行了结构设计,应用ANSYS Workbench对装置进行了模态分析和谐响应分析,通过调整滚压装置结构,使该装置能够正常高效地工作;然后综合利用NPFLEX型三维表面形貌测量系统、Proto高速大功率X射线残余应力分析仪、HV-1000型显微硬度计及VHX-2000E型超景深三维显微系统观察分析了超声滚压加工前后试样的表面粗糙度、表面二维形貌、表层显微硬度及残余应力。经超声滚压加工后试样的表面粗糙度从3.003μm降低至0.419μm,最大残余压应力出现在距离表面80μm处,大小约为-672.04MPa,高硬度层达到了200μm。结果表明,利用该装置能够有效的改善材料的表面性能。

A new ultrasonic rolling device was designed to study the effects of ultrasonic rolling processing on the surface properties of 18CrNiMo7-6 gear steel.Firstly,the structural design of the rolling device was carried out,through the ANSYS Workbench,the modal analysis and harmonious response analysis of the device were carried out,and the structure of the rolling device was adjusted so that the device could work normally and efficiently,and then the surface roughness,two dimensional surface topography,surface microhardness and residual stress of samples before and after processing were observed and analyzed comprehensively using NPFLEX 3d surface topography measurement system,Canadian proto high speed high power X-ray residual stress analyzer,HV-1000 microhardness tester and VHX-2000E Hyperdepth-3d microscopy system.After the ultrasonic rolling processing,the surface roughness of the sample decreased from 3.003μm to 0.419μm,and the maximum residual compressive stress appeared at 80μm away from the surface,which is about-672.04 MPa.The high hardness layer reached 200μm.The results show that this device can effectively improve the surface properties of materials.