曾加恒,陈燕,张科丙,刘新龙,陈宇辉.旋转超声辅助磁力研磨镍基合金参数优化设计及分析[J].表面技术,2018,47(11):274-280.
ZENG Jia-heng,CHEN Yan,ZHANG Ke-bing,LIU Xin-long,CHEN Yu-hui.Optimization Design and Analysis of Ni Based Alloy by Rotating Ultrasonic Assisted Magnetic Abrasive Finishing[J].Surface Technology,2018,47(11):274-280 |
| 旋转超声辅助磁力研磨镍基合金参数优化设计及分析 |
| Optimization Design and Analysis of Ni Based Alloy by Rotating Ultrasonic Assisted Magnetic Abrasive Finishing |
| 投稿时间：2018-04-18 修订日期：2018-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.11.039 |
| 中文关键词: 旋转超声 磁力研磨 镍基合金 响应面法 参数优化 |
| 英文关键词:rotating ultrasound magnetic abrasive finishing nickel base alloy response surface method parameter optimi-zation |
| 基金项目:国家自然科学基金（51105187） |
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| Author | Institution |
| ZENG Jia-heng | School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China |
| CHEN Yan | School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China |
| ZHANG Ke-bing | School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China |
| LIU Xin-long | School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China |
| CHEN Yu-hui | School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051, China |
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| 中文摘要: |
| 目的 针对镍基高温合金进行旋转超声磁力研磨加工试验，通过响应面法分析主轴转速、超声频率、超声振幅、粒径交互作用对工件表面的影响。方法 在磁力研磨基础上添加旋转超声高频轴向机械振动，通过磁性研磨粒子对工件表面的垂直冲击，增加研磨压力以及磁性研磨粒子的翻滚动作，完成旋转超声辅助磁力研磨，测定表面粗糙度、表面残余应力等性能参数。采用响应面法分析主轴转速、磁性研磨粒子粒径和超声频率的交互作用对试验的影响规律，拟合出最佳工艺参数条件。结果 在试验条件下得出，主轴转速1000 r/min、磁性研磨粒子粒径250 μm、超声频率19 kHz、超声振幅19 μm的加工工艺组合效果最佳，并与响应面法优化参数后的结果相一致。根据优化参数进行试验，经过40 min研磨加工后，Ra从加工前的3.2 μm降至0.072 μm，工件表面各位置粗糙度均匀，表面质量较好。工件内部残余拉应力从+51 MPa转变为残余压应力-121 MPa。结论 旋转超声辅助磁力研磨加工后，工件表面均匀性提高，原始工件表面的凹坑、凸起、表面微裂纹等缺陷被完全去除，表面形貌和表面质量较好。该工艺加工效率较高，工件内部可得到良好的应力状态。 |
| 英文摘要: |
| The work aims to carry out the rotating ultrasonic magnetic abrasive grinding test for nickel base superalloy and analyze the influence of the spindle speed, the ultrasonic frequency, the ultrasonic amplitude and the interaction of the particle size on the work-piece surface by the response surface method. On the basis of magnetic grinding, the rotating ultrasonic high frequency axial mechanical vibration was added and the surface of the work-piece was impacted vertically by the magnetic abrasive particles. The grinding pressure and the rolling motion of the magnetic abrasive particles were increased to complete the rotational ultrasonic assisted magnetic grinding and obtain the surface roughness and the residual stress of the surface. The response surface method was used to analyze the influence of the interaction among the spindle speed, the particle size of magnetic abrasive particles and the ultrasonic frequency on the test and fit the optimum parameters. In the test conditions, the combination of the spindle speed at 1000 r/min, the magnetic abrasive particle size of 250 μm, the ultrasonic frequency of 19 kHz and the ultrasonic amplitude of 19 μm was the best and accorded with the results after the optimized by response surface method. According to the optimized parameters, after 40 min grinding, the roughness of the workpiece surface before and after the processing was measured by the roughness measuring instrument and decreased from the Ra 3.2 μm to Ra 0.072 μm. The surface roughness of the workpiece was uniform and the surface quality was good. The residual tensile stress of +51 MPa inside the workpiece changed to the residual compressive stress of -121 MPa. The surface uniformity of the work-piece is improved after the rotating ultrasonic assisted magnetic grinding. The defects of the pits, convex and micro cracks on the surface of the original work-piece are completely removed. The quality of the morphology and surface of the work-piece is better, the machining efficiency is higher and the good state of the work-piece is obtained. |
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